Abstract

44] (R being tert-butyl) and di-t-butyl peroxide as an oxidant. The present invention is not only applicable to a methylbenzene compound containing a benzylic primary carbon-hydrogen bond but also applicable to an ethylbenzene compound containing a benzylic secondary carbon-hydrogen bond, and therefore is widely applicable. This is the first case where the preparation of a benzyl amine compound by means of an oxidation reaction between a methylbenzene/ethylbenzene compound and arylamine is implemented by an iron catalyst.

IPC Classes  ?

• C07D 233/58 - Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring nitrogen atoms
• C07C 209/02 - Preparation of compounds containing amino groups bound to a carbon skeleton by substitution of hydrogen atoms by amino groups
• C07C 211/48 - N-alkylated amines

Abstract

The present invention relates to the use of n-butyllithium and specifically relates to the use of n-butyllithium for catalyzing the hydroboration of an imine and a borane. A catalyst, the borane and the imine are sequentially stirred and mixed uniformly, and are reacted for 1-2 h; the mixture is exposed to air to terminate the reaction; and the reaction liquid is subjected to reduced pressure to remove the solvent, so as to obtain a borate with different substituents. The n-butyllithium disclosed in the present invention can be used for catalyzing the hydroboration of the imine and the borane in high activity under room temperature conditions, the amount of the catalyst is only 4-5 mol% of the molar weight of the imine, and the yield of the reaction can reach 90% or more. Compared with the existing catalytic system, the commercialized reagent n-butyllithium is used, the reaction conditions are mild, and the yield of the borate with different substituents under limited conditions can reach 99%.

IPC Classes  ?

• B01J 31/12 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing organo-metallic compounds or metal hydrides
• C07F 5/02 - Boron compounds
• C07F 5/04 - Esters of boric acids

Abstract

Disclosed are a method and system for reducing noise interference on the basis of a cascaded Kalman filter, designed for suppressing a phase noise caused by laser line width. The method comprises: generating a spiral 16-QAM signal, wherein 16 constellation points of the spiral 16-QAM signal are located on four amplitudes, and there are only four constellation points on each amplitude, with the minimum angular distance between adjacent points being π/2; and receiving the spiral 16-QAM signal by means of clock recovery and channel balancing processing, and the spiral 16-QAM signal being then processed by a Kalman filter. The method and system have a relatively high noise margin and a relatively high robustness against laser line width.

IPC Classes  ?

• H04L 27/34 - Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems

Abstract

Disclosed are a trifluoromethyl alkenylphosphonate derivative and preparation method therefor. The preparation method comprises the following steps: dissolving an acetylene derivative, an iodine compound, and a phosphorus reagent in a solvent for reaction at the temperature from the room temperature to 100ºC to obtain the trifluoromethyl alkenylphosphonate derivative. In the present invention, the acetylene derivative is used as a starting material, and the raw materials are easily available and diversified; products obtained by using the method of the present invention have various types and can be directly used and also used for other further reactions; moreover, the method disclosed in the present invention has the advantages of short steps, mild reaction conditions, simple reaction operation and post-treatment processes, and high yield, and is suitable for large-scale production.

IPC Classes  ?

• C07F 9/40 - Esters thereof

Abstract

A snapshot full-field white light interference microscopic measurement method and a device thereof. On the basis of a white light interference microscopic measurement method and a snapshot spectral imaging and detecting technology, polychromatic parallel light passes through an axial dispersion-type interferential optical system and is dispersed successively in the axial direction and is focused, in one-to-one correspondence, on positions having different axial depths, the intensity of a white light interference signal on a spectral domain varies with wavelengths and reaches a maximum value at the focal plane of certain monochromatic light obtained by axial dispersion, so that unique coding between a white light interference signal, a spectrum, and a depth can be established, realizing measurement of distribution of three-dimensional morphology of an element to be detected.

IPC Classes  ?

• G01B 11/25 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. moiré fringes, on the object

Abstract

The present invention discloses a method for preparing a perfluoroalkyl sulfinate ester, comprising: subjecting an α-carbonyldiazo compound and sodium perfluoroalkyl sulfinate, which serve as reaction substrates, to a coupling reaction in an organic solvent in the presence of inexpensive anhydrous copper acetate as an optimal catalyst and tert-butyl hydroperoxide (TBHP) as a green oxidant, to obtain the perfluoroalkyl sulfinate ester. Compared to the prior art, the present method has the advantages of a wide range of reaction substrates, a short reaction time, a high reaction yield, and mild reaction conditions, among others. The reaction does not require pre-activation of sodium perfluoroalkyl sulfinate, which can participate in the reaction directly, making reaction operations simple. The present method uses TBHP as a green oxidant and produces tert-butanol and water after reaction. Moreover, the present method avoids using a bromide or a chloride as a reaction material, and thus avoids formation of a large amount of a halide salt. Therefore, the present method is environmentally friendly and meets the requirements of contemporary green chemistry.

IPC Classes  ?

• C07C 303/02 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
• C07C 303/32 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of salts of sulfonic acids
• C07C 313/04 - Sulfinic acidsEsters thereof
• C07C 313/02 - Sulfinic acidsDerivatives thereof
• C07C 303/22 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids by reactions not involving the formation of sulfo or halosulfonyl groups

Abstract

A method and system for designing a sponge city on the basis of total rainwater control, wherein a database of a rainwater source control facility is preset, background information of a city to be designed is acquired, and design rainfall is determined; a user selects a base range on a map, and a system automatically identifies underlying surface types within the base range, and provides rainfall runoff coefficients corresponding to various underlying surface types respectively; an automatic or manual method is used to design a corresponding rainwater source control facility on each underlying surface, calculate and display storage rainfall of each facility, display a total volume of controlled rainfall under a current design state, the design rainfall, an actual control rate and a required increased rainfall control volume; and the sponge city design is completed by means of modifying so that an actual design rainfall corresponding to the total volume of controlled rainfall under the current design state is greater than or equal to the design rainfall.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• E03F 1/00 - Methods, systems, or installations for draining-off sewage or storm water

Abstract

Provided are a method and a device for measuring microstructure topography based on dispersion spectrum coding. After passing through an axial dispersion optical system, parallel light of polychromatic sine fringes is sequentially dispersed in the axial direction and focused on different axial depth positions one by one, and the modulation of each monochromatic sine fringe of axial dispersion varies with the axial depth and reaches a maximum near its focal plane position, a unique code required for measurement among "spectrum-modulation-depth" is established, and a non-contact measurement of the three-dimensional topography distribution of a measured element is implemented.

IPC Classes  ?

• G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures

Abstract

A welding method for preparing a graphene-reinforced weld seam between dissimilar steel and aluminum materials comprises the following steps: (1) preparing a certain amount of nickel powder and graphene powder according to a mass ratio, performing ball milling and mixing, and after the uniform mixing, acquiring mixed nickel/graphene powder; (2) placing the uniformly mixed nickel/graphene powder in a die for a press, pressing the mixed nickel/graphene powder into a nickel/graphene block, and performing vacuum sintering on the pressed block to prepare a composite nickel/graphene material; (3) rolling the composite nickel/graphene material into a composite nickel/graphene foil having a certain thickness; (4) selecting a composite nickel/graphene foil having the same thickness as the thickness of a sheet to be welded, cutting the composite nickel/graphene foil to a required welding size, and causing the composite nickel/graphene foil to be held between clean steel and an aluminum alloy to be welded; and (5) welding the steel and the aluminum alloy to acquire a graphene-reinforced weld seam between dissimilar steel and aluminum materials.

IPC Classes  ?

• B23K 3/00 - Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods

Abstract

A virtual surgical method for a minimally invasive abdominal surgical robot, comprising the following steps: a. building a virtual surgical simulation platform, comprising designing a robot model having a parallelogram telecentric positioning mechanism, and controlling the operation of a virtual robot by means of a force feedback device; b. establishing a physical model of a surgical object, and performing force balance calculation to realize simulation operations and force interactions of the pressing deformation and clamping deformation of the surgical object; c. establishing a grid model of the surgical object, to realize cutting simulation of the surgical object; d. establishing a suture using a spring model, to realize suture knotting simulation; and e. realizing the suture simulation process of the surgical object by analyzing the frictional force and tension of the suture involved in the interaction of same with soft tissue. The virtual surgical method of a minimally invasive abdominal surgical robot is able to perform full-range simulation of a surgery, and has high accuracy and strong real-time performance.

IPC Classes  ?

• A61B 34/10 - Computer-aided planning, simulation or modelling of surgical operations

Abstract

Disclosed is a minimally invasive transabdominal surgery robot, comprising a control device, a rack, at least three robot arms (100) connected to the rack, and at least three end effector clamping devices (200) connected to the robot arms, with each of the robot arms (100) comprising a position adjustment mechanism, and a telecentric mechanism capable of taking control by means of the control device, wherein the position adjustment mechanism comprises a first sliding block (111), a rotatably-connected first rod member (112), a rotatably-connected second rod member (113) and a rotatably-connected third rod member (114); and the telecentric mechanism comprises a pivot member (115) pivotally connected to the position adjustment mechanism, a rotatably-connected first connecting rod (116), a rotatably-connected second connecting rod (117), a rotatably-connected third connecting rod (118) and a second sliding block (119). According to the minimally invasive transabdominal surgery robot, the telecentric mechanism of the robot arm is a single parallelogram mechanism, so that the range of angles of rotation of each joint is increased, and the flexibility and the obstacle avoidance capacity of the telecentric mechanism of the robot arm is improved.

IPC Classes  ?

• A61B 34/30 - Surgical robots
• A61B 17/00 - Surgical instruments, devices or methods

Abstract

The invention discloses a porous lithium ion battery separator film employing a cross-linked polymer and a linear polymer, a preparation method and an application thereof. The specific preparation method is: uniformly mixing polyvinylidene fluoride-hexafluoropropylene, (methyl)acrylate monomers, an octavinyl polyhedral oligomeric silsesquioxane cross-linking agent and a nano-oxidant in a suitable solvent; and forming a gel polymer film having a cross-linked structure via radical polymerization. After pore formation by nano-zinc oxide, ionic conductivity of the gel polymer film at 25℃ reaches 1.4×10 -3 S/cm, the tensile strength thereof reaches 16 MPa, and the gel polymer film has excellent dimensional stability. The lithium ion battery separator film obtained by the invention can greatly improve ionic conductivity, demonstrates significant improvement in high-rate charging/discharging performance, and has good application potential.

IPC Classes  ?

• H01M 2/14 - Separators; Membranes; Diaphragms; Spacing elements
• H01M 2/16 - Separators; Membranes; Diaphragms; Spacing elements characterised by the material
• H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodesLithium-ion batteries

Abstract

The present invention relates to a β phase polyvinylidene fluoride-based piezo-composite comprising β phase polyvinylidene fluoride and a molecular ferroelectric having a plurality of polar axes, the β phase polyvinylidene fluoride occupying 85%-96% of the mass fraction of the piezo-composite. The present invention also provides a preparation method therefor, comprising: uniformly mixing and dissolving PVDF and the molecular ferroelectric having a plurality of polar axes in an organic solvent to obtain a mixed solution, the mass ratio of polyvinylidene fluoride to the molecular ferroelectric being 99:1-4:1, the sum of the mass of polyvinylidene fluoride and the molecular ferroelectric accounting for 1%-15% of the mass fraction of the mixed solution; and subjecting the mixed solution to evaporation and crystallization to obtain a β phase polyvinylidene fluoride-based piezo-composite. The piezo-composite of the present invention has a high content of β phase polyvinylidene fluoride, stable properties, and better piezoelectricity, and the preparation method is simple and easy to operate.

IPC Classes  ?

• C08L 27/16 - Homopolymers or copolymers of vinylidene fluoride
• C08K 5/3462 - Six-membered rings
• C08K 5/55 - Boron-containing compounds
• C08J 5/18 - Manufacture of films or sheets
• H01L 41/193 - Macromolecular compositions

Abstract

A platinum sulfide protein nanoparticle having near-infrared photothermal effect and multi-modal imaging function, a preparation method therefor and an application thereof. The platinum sulfide nanoparticle having near-infrared photothermal effect and multi-modal imaging function is prepared in aqueous phase by means of formulation screening and process limitation. The nanoparticle has an ultra-small particle size and good stability as well as tumor targeting and photothermal effects and integrates functions of near-infrared imaging, CT imaging, and thermal imaging, so as to achieve high sensitivity, high resolution, and precise positioning of tumors, and to produce high-efficiency photothermal effects under the excitation of near-infrared light to kill tumor cells by thermal ablation, thereby achieving the purpose of efficient, safe, visual, and accurate treatment of tumors. The nanoparticle has the potential for further development and clinical application.

IPC Classes  ?

• A61K 41/00 - Medicinal preparations obtained by treating materials with wave energy or particle radiation
• A61K 49/00 - Preparations for testing in vivo
• A61K 49/22 - Echographic preparationsUltrasound imaging preparations
• A61K 49/04 - X-ray contrast preparations
• A61P 35/00 - Antineoplastic agents

Abstract

Disclosed in the present invention are a method for preparing an inorganic perovskite battery based on synergistic effect of gradient annealing and an antisolvent, and a prepared inorganic perovskite battery, which is a perovskite solar battery capable of being produced at a low temperature, is simple to prepare, has a low cost and a high efficiency, a perovskite layer being formed by spin-coating method using gradient annealing and antisolvent treated solution, such that a smoother, more uniform, more efficient and more stable thin film can be obtained. Compared to the conventional one-step annealing and toxic antisolvent method, the gradient annealing method can form a denser thin film and provide a purer phase state; and the use of a green antisolvent in place of traditional toxic antisolvents effectively reduces environmental contamination. Furthermore, in the microstructure, the grain size of the antisolvent treated thin film is in the order of a micrometer, and the grain boundaries are extremely few, such that the defect state of the whole thin film is suppressed, which also provides a guarantee for the thermal stability and humidity stability of the perovskite thin film.

IPC Classes  ?

• H01L 31/18 - Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
• H01L 31/032 - Inorganic materials including, apart from doping materials or other impurities, only compounds not provided for in groups

Abstract

399] 3+433] 3–33 CN is used as a catalyst, and a 2-naphthol is used as an accelerator for a catalytic reaction of a chalcone compound so as to prepare a product; and Ln, contained in the catalyst, represents a positive trivalent rare earth metal ion and is selected from one of La, Nd, Sm, Gd and Yb. According to the method, the raw materials are easy to obtain, the reaction process is simple, the catalyst dosage is low, the catalyst is universally applicable to various substituted 2-hydroxy chalcones, the obtained cyclopentadienyl [c] chromium compound is unreported. The catalyst synthesis method is simple and easy to obtain, the target product shows a high yield and can reach 85%.

IPC Classes  ?

• C07D 311/94 - Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems condensed with rings other than six-membered or with ring systems containing such rings
• B01J 31/22 - Organic complexes

Abstract

The present invention relates to an Eu3+1-xx455, wherein 0.001 ≤ x ≤ 1.0. The Eu3+ ion activated fluorescent material emits red fluorescence under the excitation of an ultraviolet and/or near-ultraviolet light. The present invention achieves a pure-phase red fluorescent powder, which has an excellent light-emitting performance, by using a high-temperature solid-phase method. The red fluorescent powder has a very strong excitation efficiency under ultraviolet and near-ultraviolet light, and the emission wavelength thereof coincides considerably with that of a near-ultraviolet LED chip, and the light emitted therefrom has a sharp spectrum mainly comprising 615 nm red light.

IPC Classes  ?

• C09K 11/86 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing inorganic luminescent materials containing rare earth metals containing oxygen and halogen, e.g. oxyhalides

Abstract

Disclosed is a convolutional neural network based multi-point regression forecasting model for traffic flow forecasting, comprising the following steps: a first perception input layer and a second convolutional layer: performing convolution on data of the input layer and outputting after passing an activation function; a plurality of convolutional layers: using the output of the previous layer as an input to perform convolutional processing and outputting after passing an activation function; a fourth all-link layer and a fifth dropping layer: "a random dropping layer" discarding some redundant nerve cells and maintaining 40-70% of all-link nodes of the previous layer; and a sixth output layer: performing regression calculation on an effective node output of the dropping layer; the obtained regression numerical value being an output of the entire network; setting m output nodes, that is, mapping the all-link layer to the output layer as a weight combination. Compared with the traditional statistical regression model, the regression forecasting model has data space associated feature extraction capability, has the advantages of local perception and weight sharing, and has good balance on time complexity and feature selection.

IPC Classes  ?

• G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
• G06N 3/04 - Architecture, e.g. interconnection topology

Abstract

Provided are an ultraviolet light triggered crosslinking near-infrared molecular probe and a preparation method and an application therefor. The preparation method comprises the following steps: constructing and synthesising a photo-crosslinking near-infrared molecular probe DACF; triggered by ultraviolet light, the photo-crosslinking near-infrared molecular probe DACF implements crosslinking in cells. The probe is irradiated by light of a specific wavelength to produce a highly active carbene intermediate that bonds covalently to intracellular biomolecules, significantly increasing the intake of the probe in the cells and extending the retention time, and being capable of implementing long-term tracking of tumour cells. In addition, using the photothermal effect of the probe can better kill tumour cells. The photo-crosslinking near-infrared molecular probe DACF obtained by the present preparation method can effectively increase the enrichment and retention time of the probe in living tumours, integrating the diagnosis and treatment of tumours, and having important scientific research and economic value.

IPC Classes  ?

• C07D 487/04 - Ortho-condensed systems
• C09B 23/08 - Methine or polymethine dyes, e.g. cyanine dyes characterised by the methine chain containing an odd number of CH groups more than three CH groups, e.g. polycarbocyanines
• A61K 31/519 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
• A61P 35/00 - Antineoplastic agents

Abstract

The present invention relates to an Eu3+1-xx3466, with 0.001≤x≤0.1, wherein the Eu3+ ion-activated phosphate-based fluorescent material emits red fluorescent light under near ultraviolet light excitation. The fluorescent material of the present invention is prepared by using a wet chemical sol-gel method. Same has rich raw material sources, a simple process, and a low sintering temperature. The fluorescent material of the present invention has a very good absorption of light in the near ultraviolet light region, a good heat stability and a high light-emitting efficiency, and is suitable for various lighting displays and photoluminescence chrominance adjustments in which near ultraviolet light is involved as the excitation source.

IPC Classes  ?

• C09K 11/75 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
• H01L 33/50 - Wavelength conversion elements

Abstract

Provided are a polyethylene glycol-b-polytyrosine-lipoic acid copolymer, polypeptide micelle, method for preparation thereof, and application thereof. First, a PEG-PTyr-LA polypeptide copolymer is prepared by means of NCA ring-opening polymerization and an esterification reaction; the method is simple and controllable, and the prepared polymer has good biocompatibility and biodegradability. Then, the polymer is self-assembled to obtain a micelle having a small particle size, good stability, reduction responsiveness, and a high drug loading amount. The micelle drug can circulate in vivo for a long time, and penetrates tumor tissues better, greatly improving the enrichment of the drug at the tumor and thus also better inhibiting the growth of an MDA-MB-231 breast cancer transplantation tumor.

IPC Classes  ?

• C08G 69/46 - Post-polymerisation treatment
• C08G 69/40 - Polyamides containing oxygen in the form of ether groups
• A61K 47/34 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
• A61K 47/42 - ProteinsPolypeptidesDegradation products thereofDerivatives thereof, e.g. albumin, gelatin or zein
• A61K 47/36 - PolysaccharidesDerivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
• A61K 9/107 - Emulsions
• A61K 31/704 - Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages attached to a carbocyclic compound, e.g. phloridzin attached to a condensed carbocyclic ring system, e.g. sennosides, thiocolchicosides, escin, daunorubicin, digitoxin
• A61P 35/00 - Antineoplastic agents

Abstract

A single chip ONU of an FPGA transceiver which faces a multi-application PON, comprising: an MAC module, a physical interface module and a transceiver module, the MAC module carrying out frame forming processing in a transmission direction, adding a preamble and check sum to a data packet to be transmitted of a user, transmitting same to the physical interface module so as to carry out character set conversion according to a line coding format, burst caching, and transmitting the packet to the transceiver module for parallel-to-serial conversion; in a receiving direction, performing serial-to-parallel conversion on the received data by means of the transceiver module, transmitting same to the physical interface module for data realignment and control character deletion, and transmitting the data to the MAC module to filter and parse valid data. In the described ONU, a general layered model which use transceivers as a basis and a provided physical interface layer complete unified compatibility of transceivers having different line coding schemes and differing synchronization functions; by using the physical interface layer to shield the differences between high-speed transceivers, transceivers which have different coding formats and synchronization functions are made compatible.

IPC Classes  ?

• H04B 10/40 - Transceivers
• H04L 29/06 - Communication control; Communication processing characterised by a protocol

Abstract

The present invention discloses a method for preparing a β-phosphonyl-enamine derivative. The preparation method is characterized by comprising the following steps: dissolving an enamine derivative, an organic phosphine compound, a manganese acetate and a potassium carbonate in a solvent, and reacting at room temperature to obtain the β-phosphonyl-enamine derivative. The enamine derivative is used as a starting material, and the raw materials are easy to obtain and are of many different types. The various forms of the products obtained therein can be directly applied and can be used in further reactions. The reaction conditions are mild, the reaction speed is high, the reaction operation and the post-treatment process are simple, the production is convenient, and the method is suitable for large-scale production.

IPC Classes  ?

• C07F 9/40 - Esters thereof
• C07F 9/53 - Organo-phosphine oxidesOrgano-phosphine sulfides

Abstract

A bolt screening machine, comprising an external frame (10), a feeding mechanism (20), and a screening mechanism (30), wherein the feeding mechanism (20), the screening mechanism (30), and the external frame (10) are mounted in an integrating mode; the feeding mechanism (20) sends bolts without being screened to the screening mechanism (30); and the screening mechanism (30) screens and arranges the bolts.

IPC Classes  ?

• B07B 13/04 - Grading or sorting solid materials by dry methods, not otherwise provided forSorting articles otherwise than by indirectly controlled devices according to size
• B07B 13/16 - Feed or discharge arrangements
• B07B 13/14 - Details or accessories

Abstract

Provided is a method for preparing a β-amino phosphonic acid derivative comprising the following steps: dissolving an N-(aryl vinyl)benzamide, a dialkyl phosphite, a manganese acetate and a potassium carbonate in a solvent; reacting at room temperature to obtain a (2-benzamido-1-aryl vinyl) dialkyl phosphonate derivative; and electrolytically reducing the compound to obtain the β-amino phosphonic acid derivative. The N-(aryl vinyl)benzamide derivative is used as a starting material, and the raw materials are easy to obtain and are of many different types. The synthetic route is short, the reaction conditions are mild, the reaction operation and the post-treatment process are simple, the production is convenient, and the method is suitable for large-scale production.

IPC Classes  ?

• C07F 9/38 - Phosphonic acids [R—P(:O)(OH)2]Thiophosphonic acids
• C07F 9/40 - Esters thereof

Abstract

Disclosed are an aramid fiber electrochemical capacitor and a preparation method therefor. Silver nanoparticles, carbon nanotubes, and polypyrrole are successively applied to the surface of aramid fibers in a chemical bonding manner so as to prepare an aramid fiber electrode. Two aramid fiber electrode bundles are wound with an electrolyte so as to obtain an aramid fiber electrochemical capacitor. Compared with a polymer fiber electrochemical capacitor prepared in the prior art, the present aramid fiber electrochemical capacitor has the characteristics of a high specific capacitance, a high energy density, a high mechanical property, a high stability, good flexibility and wearability, etc.; and the preparation method is controllable and suitable for large-scale application.

IPC Classes  ?

• H01G 11/84 - Processes for the manufacture of hybrid or EDL capacitors, or components thereof

Abstract

Disclosed by the present invention are an aramid fiber electrode and a preparation method therefor. An aramid fiber electrode is prepared by coating a Ag nanoparticle, a carbon nanotube and polypyrrole on the surface of an aramid fiber in sequence in a chemical bonding mode; and two bundles of the prepared aramid fiber electrodes and electrolyte are wound to obtain an aramid fiber electrochemical capacitor. Compared with the polymer fiber electrochemical capacitor prepared by the prior art, the aramid fiber electrochemical capacitor provided by the present invention has the characteristics of high specific capacitance, high energy density, high mechanical property, high stability, good flexibility and wearability and the like. The preparation method is controllable and is suitable for large-scale application.

IPC Classes  ?

• H01G 11/30 - Electrodes characterised by their material
• D06M 11/83 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereofSuch treatment combined with mechanical treatment, e.g. mercerising with metalsTreating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereofSuch treatment combined with mechanical treatment, e.g. mercerising with metal-generating compounds, e.g. metal carbonylsReduction of metal compounds on textiles

Abstract

The invention discloses a transparent rollable foldable polysiloxane film and a preparation and self-repairing method thereof. 2,2'-dithiothreitol and a diisocyanate were added into a chloroalkane to perform a chain extension reaction to give a disulfide-containing isocyanate; bis(3-aminopropyl) terminated polydimethylsiloxane and a diisocyanate were added into a chloroalkane to perform a chain extension reaction to give a linear polydimethylsiloxane; the linear polydimethylsiloxane and a hyperbranched polysiloxane containing amino groups at the terminal were added into a chloroalkane, followed by addition of the disulfide-containing isocyanate, and after uniformly mixed, the mixture was poured into a mold, and dried to give the transparent rollable foldable polysiloxane film. In the invention, the prepared polysiloxane film has both rigidity and toughness by the dynamic physical crosslinking of hydrogen bonds at room temperatre and the permanent chemical crosslinking of hyperbranched polysiloxane, and also has good reversible self-repairing performance through hydrogen bond dissociation and disulfide ether exchange under heating conditions.

IPC Classes  ?

• C08J 5/18 - Manufacture of films or sheets
• C08L 75/02 - Polyureas
• C08L 83/08 - Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
• C08K 5/36 - Sulfur-, selenium-, or tellurium-containing compounds
• C08G 77/26 - Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen nitrogen-containing groups
• C08G 18/61 - Polysiloxanes
• C08J 7/00 - Chemical treatment or coating of shaped articles made of macromolecular substances

Abstract

An electrocardiogram generation and classification method based on a generative adversarial network. An electrocardiogram curve is trained by means of a generative adversarial network (GAN) to obtain a generative model and a discriminative model, and more pieces of electrocardiogram curve data are mined and integrated, wherein the discriminative model uses a convolutional neural network (CNN) structure, such that the generated electrocardiogram curve is more authentic; and the electrocardiogram curve is trained by means of an RBF neural network to obtain a classification model, and the classification model is tested by means of the generated electrocardiogram curve, such that the classification model can be used in clinical research, thereby realizing precise medical treatment and intelligent medical treatment.

IPC Classes  ?

• G16H 50/70 - ICT specially adapted for medical diagnosis, medical simulation or medical data miningICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for mining of medical data, e.g. analysing previous cases of other patients
• A61B 5/0402 - Electrocardiography, i.e. ECG

Abstract

A partially-observable automatic driving decision-making method and system based on constraint online planning. The decision-making method is mainly used for automatic driving and making a vehicle have multiple driving modes. The system comprises a driving environment state unit, a searching unit, a simulating unit, and a cost constraint unit. By means of the decision-making method, the present invention not only can generate a driving scheme according to a current driving environment, but also adjusts the scheme in real time according to real-time road conditions and vehicle conditions so as to improve the flexibility of the scheme. A history-based Monte Carlo search tree is constructed by means of the method, and the simulating of a solution is performed on the basis of real conditions, so that reliability is improved. In addition, certain optimal selection conditions are met in the method, so that an obtained strategy is ensured to be a random strategy, and the defect of a deterministic strategy is remedied. By means of the decision-making method, the present invention fully meets the driving requirements of current general users, and in particular, multiple modes are provided for selection, so that user experience is greatly improved.

IPC Classes  ?

• G05D 1/02 - Control of position or course in two dimensions

Abstract

A preparation method for an ultrathin boron nitride nanosheet, comprising the following steps: (a) precursor configuration: using melamine as a nitrogen source and boric acid as a boron source, the molar ratio of the nitrogen source to the boron source being 1:1-10:1; and completely dissolving melamine powder in deionized water under heating and stirring conditions, then adding boric acid powder and stirring until the reaction is complete, and obtaining a precursor solution; (b) centrifugal treatment: cooling the precursor solution to room temperature to obtain turbid liquid and carrying out centrifugal treatment, recovering obtained white precipitate, and drying to obtain precursor powder; (c) calcination treatment: pre-calcining the precursor powder under a reducing atmosphere, and then carrying out secondary calcining after heating; and naturally cooling to room temperature to obtain the ultrathin boron nitride nanosheet. The boron nitride obtained by the method is of a two-dimensional sheet structure, is rich in functional groups such as an amino group and a hydroxyl group on the surface, is thin in thickness and can be widely applied to the fields of biology, chemistry, photoelectric physics, and materials. The method has the advantages of easily available raw materials, low costs, simple process, short period, good repeatability, large-scale development, and easiness in popularization.

IPC Classes  ?

• C01B 35/14 - Compounds containing boron and nitrogen, phosphorus, sulfur, selenium or tellurium
• B82Y 40/00 - Manufacture or treatment of nanostructures

Abstract

An Eu3+1-xx33(F,Cl), wherein 0.01≤x≤0.1, and the Eu3+ion-activated bismuth chlorofluoroantimonate emits red fluorescence under the excitation of near ultraviolet light. The preparation method therefor comprises: dissolving bismuth oxide in an acid, then adding ammonia water to adjust the pH to 2-3, obtaining a white colloid, filtering, then extracting a solid for washing, and drying to obtain a precursor; evenly mixing the precursor, antimony oxide and europium fluoride and calcining at 500-600°C, and then cooling to obtain the EU3+ ion-activated bismuth chlorofluoroantimonate.

IPC Classes  ?

• C09K 11/88 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements

Abstract

526266(F,Cl), and can be used as a photocatalyst. The bismuth chlorofluorotantalate is simple in preparation method, low in production cost, good in product stability and high in photocatalysis efficiency as the photocatalyst.

IPC Classes  ?

• B01J 27/12 - Fluorides
• C02F 1/32 - Treatment of water, waste water, or sewage by irradiation with ultraviolet light

Abstract

Provided is a sgRNA for an AHI1 gene, wherein by means of an experiment of forming white to blue clones, such a prokaryotic evaluation system confirms the editing efficiency of the aforementioned sequence, proves that the sequence has excellent editing efficiency, and provides a reference for future AHI1 gene therapy.

IPC Classes  ?

• C12N 15/113 - Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides
• C12N 15/90 - Stable introduction of foreign DNA into chromosome
• C12N 9/22 - Ribonucleases
• A61K 31/7105 - Natural ribonucleic acids, i.e. containing only riboses attached to adenine, guanine, cytosine or uracil and having 3'-5' phosphodiester links
• A61P 25/00 - Drugs for disorders of the nervous system

Abstract

22 fluid dyeing and dyeing processing of a blended fabric of the natural fiber, particularly, has a very good dyeing effect on a natural fiber such as cotton, wool and silk.

IPC Classes  ?

• C07C 225/34 - Amino anthraquinones
• C07C 221/00 - Preparation of compounds containing amino groups and doubly-bound oxygen atoms bound to the same carbon skeleton
• C09B 1/32 - Dyes with amino groups substituted by hydrocarbon radicals substituted by aryl groups

Abstract

222 fluid dyeing and dyeing processing of a blended fabric of the natural fiber, and has a good dyeing effect especially for a fiber such as cotton, wool and silk. The various fastness indexes of a dyed fabric are better. The synthesis process for the dye is simple, the reaction conditions are mild, the manufacturing cost is low, and the applicability is strong.

IPC Classes  ?

• C09B 62/06 - Anthracene dyes
• C09B 62/467 - Anthracene dyes
• D06P 1/382 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using reactive dyes with a reactive group directly attached to the heterocyclic group
• D06P 1/384 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using reactive dyes with a reactive group not directly attached to the heterocyclic group
• D06P 3/66 - Natural or regenerated cellulose using reactive dyes
• D06P 3/14 - Wool
• D06P 3/10 - Material containing basic nitrogen containing amide groups using reactive dyes
• C07C 221/00 - Preparation of compounds containing amino groups and doubly-bound oxygen atoms bound to the same carbon skeleton
• C07C 225/34 - Amino anthraquinones

Abstract

Provided is an sgRNA for DJ-1 gene, the sequence thereof being as shown in SEQ ID NO: 1. Further provided are a drug and a plasmid for DJ-1 gene, the drug and the plasmid comprising the sgRNA.

IPC Classes  ?

• C12N 15/113 - Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides
• C12N 15/63 - Introduction of foreign genetic material using vectorsVectorsUse of hosts thereforRegulation of expression
• A61K 31/7105 - Natural ribonucleic acids, i.e. containing only riboses attached to adenine, guanine, cytosine or uracil and having 3'-5' phosphodiester links
• A61P 25/16 - Anti-Parkinson drugs

Abstract

Disclosed is a piezoelectric ultrasonic microinjection device based on a flexible hinge mechanism. The piezoelectric ultrasonic microinjection device comprises: a sealing cover (10), a flexible hinge mechanism (20), a base (30), a rotary cover (40) and an end cover (50), which are fixedly assembled, a pump interface (35) being arranged on the base (30); and a microneedle (60) which is fixedly mounted inside the base (30), the rotary cover (40) and the end cover (50) and which extends outwards, the microneedle (60) being in communication with the pump interface (35). The flexible hinge mechanism (20) comprises a housing (21), a piezoelectric ceramic packaging module (22) packaged inside the housing (21), a pivot shaft (23) fixedly mounted to the piezoelectric ceramic packaging module (22) and the base (30), and a vibration output shaft (24) extending to the interior of the pivot shaft (23) from the piezoelectric ceramic packaging module (22), wherein several flexible hinge beams (25) are provided between the pivot shaft (23) and the housing (21). The device can effectively suppress the harmful radial vibration of the point of the microneedle during a microinjection operation process, reduces damage to a cell and greatly improves the sealing of the device.

IPC Classes  ?

• C12M 1/00 - Apparatus for enzymology or microbiology

Abstract

Disclosed is a fairness-balanced result prediction classifier for context perceptual learning. The classifier uses the following classification steps: (1) initializing a search parameter of a classifier; (2) initializing a weight matrix of the classifier; (3) determining whether there is data in a database, if so, randomly selecting a feature of one piece of data therein, and turning to step (4), and if not, finishing training; (4) taking out a classification sample according to the probability of selecting a gambling arm; (5) predicting a result according to the weight matrix; (6) receiving feedback of an actual result, determining whether a condition is met, if so, failing in prediction, and turning to step (7), and if not, turning to step (3); and (7) updating the weight matrix of the classifier. According to the classifier in the present invention, the classifier is updated by means of a classification result, categories are classified according to features, and if classification is incorrect, a weight matrix of the classifier is updated, so that the categories classified by the classifier are more accurate, and a prediction success rate is higher.

IPC Classes  ?

• G06F 17/30 - Information retrieval; Database structures therefor

Abstract

Disclosed in the present invention is a method for preparing 1,2,4-triazole, comprising using a fluoroborate aryl diazonium salt, a diazoester derivative and an organic nitrile as reaction substrates, using a transition metal as a catalyst, and using an inorganic base as an additive to prepare 1,2,4-triazole by means of cyclization. The method used in the present invention has the following characteristics: The reaction is more economical, the substrate is more universal, the post-functionalization is easier, the reaction conditions are mild, the reaction can be performed in air, the catalyst amount used is less, and the post-treatment is simple, being beneficial to the purification and industrial application of the product. Meanwhile, in the present invention, the raw materials such as the reactants and the catalyst used are inexpensive and easily available, the reaction composition is reasonable, no ligand is needed, there are less reaction steps, and only one step of reaction is required to obtain a high yield, meeting the requirements and directions of contemporary green chemistry and medicinal chemistry, being suitable for screening highly active 1,2,4-triazole drugs.

IPC Classes  ?

• C07D 249/10 - 1,2,4-TriazolesHydrogenated 1,2,4-triazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms

Abstract

Disclosed are a 1,8-naphthalimide derivative, a preparation method therefor and a use thereof. The 1,8-naphthalimide derivative of the present invention is relatively easy to prepare, and is an enhanced Cu2+fluorescent probe, which can detect Cu2+by means of two wavelengths, and can be especially applied to almost-all-water systems. According to a titration experiment at 392 nm and a blank experiment at 754 nm, the detection limit of the 1,8-naphthalimide derivative of the present invention for Cu2+is 2.6368×10-7mol/L and 2.0156×10-7mol/L respectively, indicating that same can perform quantitative detection for Cu2+ with a high selectivity and a high sensitivity by using two wavelengths. In addition, a pH colorimetric switch based on 1,8-naphthalimide can rapidly and reversibly respond to a pH by means of three ways: a maximum absorption wavelength, absorbance and color change. Same has a narrow switching pH range (from a pH of 5.8 to a pH of 6.0, only 0.2 pH units), a good selectivity and a high sensitivity, can be used in almost-all-water systems, and has a bright application prospective.

IPC Classes  ?

• C07D 221/14 - Aza-phenalenes, e.g. 1,8-naphthalimide
• C09K 11/06 - Luminescent, e.g. electroluminescent, chemiluminescent, materials containing organic luminescent materials
• G01N 21/64 - FluorescencePhosphorescence

Abstract

Disclosed is a bombyx mori hatching and young silkworm rearing frame, comprising a rearing frame main body (1) and a rearing frame drawer (2), wherein the size of the rearing frame is convenient for needs of silkworm rearing production; the rearing frame drawer (2) can be used for storing silkworm eggs during hatching and adding water to moisturize during rearing; the shape and size of grooves (4) of the rearing frame drawer (2) and those of meshes of a middle meshed interlayer (3) are both designed according to physiological needs of silkworm bodies; a stacked fixing device is further arranged at the periphery of the rearing frame; and a carbonate polymer layer is arranged on the surface of the meshed interlayer (3). According to the use of the rearing frame, the labor productivity of hatching and young silkworm rearing can be improved, and a novel rearing instrument can be provided for large-scale and labor-saving silkworm rearing.

IPC Classes  ?

• A01K 67/04 - Silkworms

Abstract

The invention discloses a medical text generation method based on a generative adversarial network (GAN). The method comprises the following steps of: downloading multiple medical documents of a field to which a department belongs; using a word vector to express each word in each medical document; classifying the medical documents and retaining required medical documents; obtaining optimal output sequence tags of each required medical document; obtaining indexes of keyword sets of each required medical document, and randomly ordering the indexes to obtain new medical documents and corresponding sequence tags; performing training by adopting a GAN-based generative model to generate medical text; outputting the generated medical text; obtaining BLEU parameters of the generated medical text; and evaluating the generated medical text to finally obtain target medical text. The invention resolves the problem of securing patient privacy and an insufficiency of medical texts by randomly ordering data to generate new medical texts.

IPC Classes  ?

• G06F 16/30 - Information retrievalDatabase structures thereforFile system structures therefor of unstructured textual data

Abstract

A nano-gap in-situ activation-based composite anodic bonding method and device. The method comprises a discharge activation process and an anodic bonding process, and comprises the following specific steps: setting composite anodic bonding parameters; placing a silicon wafer (04) and a glass sheet (02), which are attached to and stacked with each other, on a fixed workbench, forming a nano-gap on a bonded interface, and meanwhile applying a set bonding pressure and heating the interface to a set bonding temperature; and applying a dielectric barrier discharge voltage and a bonding voltage to obtain a bonding layer. The method utilizes a nano-gap of an initial anodic bonding interface as a dielectric barrier discharge gap to implement the activation process, and then directly implement the anodic bonding process by switching a power source, thereby achieving the anodic bonding of the in-situ activation, and significantly lowering the bonding temperature, so that low temperature bonding is achieved.

IPC Classes  ?

• B81C 3/00 - Assembling of devices or systems from individually processed components

Abstract

The present invention relates to a method for configuring and operating a redundant path in a quantum communication network, and is designed in order to establish a good security protection mechanism in a quantum communication process. In the present invention, a sender performs simultaneous transmission of signals on a working path and a protection path, taking the signal transmitted on the working path to be the main signal and the signal transmitted on the protection path to be the follow signal. When the working path is normal, the sender passes the primary signal level by level on the working path, thereby achieving long-distance transmission of a quantum signal. If the working path fails, then a proxy working path will be selected from the highest priority protection paths remaining, and finally, the transfer of information is performed by means of the proxy working path. The present invention prevents unknown quantum information from being damaged during the process of transmission and becoming unrecoverable, and thus greatly improves the security, stability, and reliability of information transmission during the process of quantum communication.

IPC Classes  ?

• H04B 10/038 - Arrangements for fault recovery using bypasses

Abstract

An optical fiber nonlinear equalization method based on a non-data-aided KNN algorithm comprises: acquiring a distribution density parameter of respective data points, selecting a data point whose distribution density parameter is greater than a preset threshold and performing signal demodulation, obtaining a label corresponding to each data point, and dividing the data points into M clusters according to the labels, and obtaining a corresponding centroid; re-classifying the data points according to the obtained centroid and a Euclidean distance to form a training sample set; selecting a data point X without a label, and acquiring K nearest neighbors of the data point X from the training sample set; calculating KNN Euclidean distance data of the data point X, and finding a label cluster of the K nearest neighbors; determining a predicted label of the data point X by using a weighted sum and a voting rule, and allocating X to a corresponding cluster; and repeating above steps until processing of all data points is completed. The method greatly reduces computation complexity, realizes system zero redundancy, significantly improves system classification performance, and improves a bit error rate of the system.

IPC Classes  ?

• H04L 27/38 - Demodulator circuitsReceiver circuits
• H04B 10/61 - Coherent receivers

Abstract

Disclosed are a super-hydrophobic electrothermal epoxy resin composite material and a preparation and self-repairing method therefor. Mixing a 2,2'-dithiooxalic acid dihydrate and methylhexahydrophthalic anhydride, adding an epoxy resin thereto and curing same to obtain a reversible self-repairing epoxy resin, then coating same with carbon nanotubes/an epoxy prepolymer, curing same to obtain an electrothermal epoxy resin matrix composite, then adhering same with a modified super-hydrophobic copper powder, and curing same to obtain a super-hydrophobic electrothermal epoxy resin composite material. The electrothermal epoxy resin composite material of the present invention has a reversible self-repairing effect on major types of damage such as cracking and peeling, etc., and at the same time, the heat resistance thereof is outstanding, exceeding that of the existing polymer-based reversible self-repairing electrothermal coating; the composite material can effectively repair major types of damage such as cracking and peeling, etc., and still has a good super-hydrophobic effect after being repaired; and the composite material has an additional reversible self-repairing performance while meeting the technical requirements of anti-icing and de-icing of wind turbine blades, thereby effectively ensuring the operation safety of wind turbine units and prolonging the service life of same.

IPC Classes  ?

• C08J 7/04 - Coating

Abstract

Disclosed by the present invention are a reversible self-repairing epoxy resin and a preparation and recovery remoulding method therefor. Under the catalysis of potassium iodide, the acetate solution of 2-mercaptoacetic acid is oxidized by 30% hydrogen peroxide to obtain 2,2'-dithioglycolic acid; performing dehydration and cyclization on the 2,2'-dithioglycolic acid by means of anhydride to obtain 2,2'-dithioglyoxalic anhydride; and mixing the 2,2'-dithioglyoxalic anhydride with methylhexahydrophthalic anhydride in proportion and after curing with epoxy resin added in, a reversible self-repairing epoxy resin is obtained. According to the present invention, the composition of a dynamic cross-linked network and a permanent cross-linked network in an epoxy resin is changed, thus reversible self-repairing and recovery remoulding of the epoxy resin are realized, and meanwhile, excellent heat resistance is obtained and the mechanical property is improved. The preparation method for the reversible self-repairing epoxy resin provided by the present invention has the advantages of wide source of raw materials, simple process, good applicability and strong practicability of products.

IPC Classes  ?

• C08G 59/40 - Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups characterised by the curing agents used
• C08G 59/42 - Polycarboxylic acidsAnhydrides, halides, or low-molecular-weight esters thereof
• C08J 11/04 - Recovery or working-up of waste materials of polymers
• C07D 327/00 - Heterocyclic compounds containing rings having oxygen and sulfur atoms as the only ring hetero atoms
• C08L 63/00 - Compositions of epoxy resinsCompositions of derivatives of epoxy resins

Abstract

Provided is a long-chain non-coding RNA based BCL2 gene inhibitor, and the sequence of the long-chain non-coding RNA is as shown in SEQ ID NO: 1. The BCL2 gene inhibitor can inhibit the expression of the BCL2 gene, thereby inhibiting the growth and metastasis of tumors.

IPC Classes  ?

• A61K 48/00 - Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseasesGene therapy
• A61K 31/7105 - Natural ribonucleic acids, i.e. containing only riboses attached to adenine, guanine, cytosine or uracil and having 3'-5' phosphodiester links
• C12N 15/113 - Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides
• A61P 35/00 - Antineoplastic agents
• A61P 35/02 - Antineoplastic agents specific for leukemia

Abstract

Disclosed is a method for preparing an imidazoline-2 ketone compound. The method comprises: dissolving tropone and aryl isocyanate into an anhydrous solvent, and reacting for 0.5-5 hours at the temperature of 100ºC-250ºC; and extracting, distilling to dryness, and performing column chromatography purification after reaction is complete to obtain a product of the imidazoline-2 ketone compound. The method is a simple method for synthesizing an imidazoline-2 ketone compound, does not need an oxidant or a metal catalyst, is simpler than the conventional cyclization method for compounds such as α-amino carbonyl and propargyl urea, and is good in atomic economy and step economy.

IPC Classes  ?

• C07D 235/02 - Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems

Abstract

A stem cell preparation resisting hypoxia injury, a preparation method therefor, and use thereof in preparation of a medicament for treating acute myocardial infarction. The preparation method for the stem cell preparation resisting hypoxia injury comprises mixing stem cells and a liquid of lentivirus with Fstl1 overexpression in a medium to obtain the stem cell preparation resisting hypoxia injury. The Fstl1 modified MSCs provided by the present invention have anti-hypoxia injury capability, can improve transplant survival rate, and can improve the cardiac function after infarction by means of direct injection into the cardiac muscle.

IPC Classes  ?

• C12N 5/0775 - Mesenchymal stem cellsAdipose-tissue derived stem cells
• A61K 35/28 - Bone marrowHaematopoietic stem cellsMesenchymal stem cells of any origin, e.g. adipose-derived stem cells
• A61P 9/10 - Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis

Abstract

12020alkyl; and R112020alkyl. The method of the present invention has simple reaction conditions, a convenient post-treatment, is environmentally friendly, and requires no transition metal catalysis.

IPC Classes  ?

• C07D 333/08 - Hydrogen atoms or radicals containing only hydrogen and carbon atoms
• C07D 333/12 - Radicals substituted by halogen atoms or nitro or nitroso radicals
• C07D 333/24 - Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals

Abstract

toto water a plant in the plant pot (2). Compared with conventional facade greening techniques, the system solves problems such as nonuniform watering of plants, low watering levels, and high maintenance costs.

IPC Classes  ?

• A01G 27/00 - Self-acting watering devices, e.g. for flower-pots
• A01G 9/02 - Receptacles, e.g. flower-pots or boxes Glasses for cultivating flowers

Abstract

Disclosed is a partially observable Markov decision process (POMDP)-based optimal robot path planning method. A robot searches for an optimal path to a target position. A POMDP model and an SARSOP algorithm are used as a basis. A GLS search method is used as a heuristic condition during searching. For continuous state and massive view space problems, the usage of the present invention can reduce the times for updating upper and lower bounds of the belief state in multiple similar paths which are updated repetitively by an early classical algorithm using an experiment as the heuristic condition. The final optimal policy is not affected, the algorithm efficiency is improved, and the robot can get a better policy and find a better path in the same time.

IPC Classes  ?

• G05D 1/02 - Control of position or course in two dimensions

Abstract

A recognition system for security checks and a control method thereof. The recognition system for security checks is integrated with a reinforcement learning algorithm and an attention region proposal network. The recognition system for security checks comprises the following modules: an object feature extraction module (1); a dangerous item region segmentation module (2); a preliminary classification module (3); a preliminary classification result determination module (4); and a fine-grained recognition module (5). In the invention, optimization of a dangerous item region segmentation module and provision of a fine-grained recognition module greatly improve accuracy and efficiency of security check, shorten a duration of security check, alleviate congestion, save labor, and reduce pressure on security check personnel.

IPC Classes  ?

• G06K 9/62 - Methods or arrangements for recognition using electronic means

Abstract

Disclosed in the present application are an edge computing service caching method, system and device, and a computer-readable storage medium. An edge computing service network is divided into multiple areas, and each area comprises multiple sub-areas; the sub-areas correspond one-to-one with edge computing nodes; each edge computing node is divided into a hotspot storage space and an ordinary storage space; according to the degree of preference for different information data at different nodes, different information data are stored in the hotspot storage space and a local storage space of each edge computing node using a certain computing mode, so as to optimize cross-node coprocessing of user access requests, shorten the access time of a user and maximize the use of the processing ability and storage space of the edge computing nodes; and finally, the size of the hotspot storage space is continuously adjusted and the distribution of information data stored in the edge computing node is changed, so that a solution is obtained for information data storage distribution data of the edge computing nodes under the optimal average access delay of the user, and the average access delay of the user is thus minimized.

IPC Classes  ?

• G06F 3/06 - Digital input from, or digital output to, record carriers

Abstract

Disclosed are a network planning method for service transmission with asymmetric traffic of a multi-core fiber network, and a network. The method comprises: acquiring a service with asymmetric traffic needing to be transmitted of a multi-core fiber network, and obtaining a target service; and according to the target service, respectively establishing a corresponding route, and for each link passed by the route, reversely allocating, in a staggered manner, optical cores in the multi-core fiber and corresponding frequency gaps, so as to optimize network planning based on a multi-core fiber. In the network planning method for asymmetric service transmission of a multi-core fiber network provided in the present application, by reversely allocating, in a staggered manner, optical cores in a multi-core fiber and corresponding frequency gaps, not only is the problem of crosstalk between unidirectional optical cores in the multi-core fiber network suppressed, but the utilization rate of multi-core fiber network resources is also improved, thus optimizing the network planning of service transmission of the multi-core fiber network.

IPC Classes  ?

• H04B 10/25 - Arrangements specific to fibre transmission

Abstract

A polymer laser for continuous optical pumping and a manufacturing method therefor: coating an organic solution of an organic polymer on a flat transparent substrate to form an organic polymer film, and covering a surface of the organic polymer film with a template having a distributed feedback-type structure, or coating a solution of the organic polymer on a transparent substrate having a distributed feedback-type structure to form an organic polymer film, and covering a surface of the polymer film with a flat panel; the organic polymer is a photoluminescent polymer; heating the substrate to raise the temperature thereof to be above a phase inversion temperature of the organic polymer, and pressurizing a surface of the template or the flat panel for 1-100 min; slowly cooling such that the temperature of the substrate reaches below the phase inversion temperature of the organic polymer, and removing the template or the flat panel from the surface of the organic polymer to obtain a polymer laser for continuous optical pumping.

IPC Classes  ?

• H01S 5/04 - Processes or apparatus for excitation, e.g. pumping
• H01S 5/12 - Construction or shape of the optical resonator the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers

Abstract

A self-adaptive torsional vibration damper, which comprises: an inner casing (1), an outer casing (2) and resonance bodies that are disposed between the inner casing (1) and the outer casing (2); the resonance bodies comprise mass blocks (4) and restraining springs (3) that support the mass blocks (4) between the inner casing (1) and the outer casing (2); the resonant bodies are arranged in pairs and are symmetrically distributed about the center of a rotating shaft. When the excitation force frequency of the rotating shaft coincides with a resonant frequency, the resonant bodies targetedly absorb the torsional vibration energy at said frequency so as to reduce vibration, thereby reducing a torsional amplitude value from a source angle, and ensuring the safe operation of a shaft system. The present invention further relates to a diesel engine comprising a self-adaptive torsional vibration damper.

IPC Classes  ?

• F16F 15/14 - Suppression of vibrations in rotating systems by making use of members moving with the system using freely-swinging masses rotating with the system

Abstract

A railway sound insulation and noise reduction structure, and manufacturing method thereof. The structure is composed of a certain number of topographical unit members (1) arranged in a sound wave direction of railway noise. The topographical unit members (1) comprise embankments and recesses and meet earthwork balance. The embankments and a main constituent in the recesses, air, construct phononic crystal cells periodically arranged to form a one-dimensional phononic crystal structure. An elastic wave forbidden band is created because of Bragg scattering, thus enhancing the sound insulation and noise reduction performance. The embankments form an acoustic barrier and reflect sound waves. The recesses between the embankments are used to form cavity structures, enabling noise sound waves to be reflected multiple times and dissipated as thermal energy. The embankments comprise greening grass slopes and pedestrian tracks (7). Water is drained from the greening grass slopes to the recesses, and collected for plant watering to save water resources. The pedestrian tracks (7) can be used for recreation. The greening grass slopes are covered with lawns and form resonant unit members to control forward propagation of elastic waves, thus further enhancing the sound insulation and noise reduction performance.

IPC Classes  ?

• E01F 8/00 - Arrangements for absorbing or reflecting air transmitted noise from road or railway traffic

Abstract

An automatic driving system based on relative-entropy deep inverse reinforcement learning, comprising: (1) a client configured to display a driving strategy; (2) a basic driving data collection sub-system configured to collect road information; and (3) a storage module connected to the client and the basic driving data collection sub-system and configured to store the road information collected by the basic driving data collection sub-system, wherein the basic driving data collection sub-system collects the road information and transmits the road information to the client and the storage module; the storage module receives the road information, stores a piece of continuous road information as a historical route, conducts analytical calculation according to the historical route to simulate the driving strategy, and transmits the driving strategy to the client for user selection; and the client receives the road information and implements automatic driving according to the selection of the user. The system adopts the relative-entropy deep inverse reinforcement learning algorithm to achieve automatic driving under a model-free condition.

IPC Classes  ?

• G05D 1/02 - Control of position or course in two dimensions

Abstract

Disclosed in the present invention is an optical fiber nonlinearity equalization method used in a 64-QAM coherent light communications system, processing received 64-QAM data, and comprising: configuring a received data set to be a first-level data set, calculating a density parameter of each data point, setting a threshold, and selecting data having a density parameter exceeding the designated threshold as a second-level data set; demodulating the second-level data set, dividing into 64 clusters, and acquiring 64 centroids; according to the acquired centroids, categorizing data in the second-level data set into corresponding clusters according to a nearest Euclidean distance, and updating using centroids of 64 acquired new clusters; allocating data in the first-level data set into corresponding clusters according to a nearest Euclidean distance, acquiring 64 clusters after categorization, and calculating an optimum centroid of an acquired cluster. The present invention can rapidly and precisely select a globally optimal K-means cluster centroid without requiring iteration, greatly decreasing the effects of Kerr nonlinearity in optical fiber, and enabling an obtained bit error rate performance to be half an order of magnitude higher than previous un-processed performance.

IPC Classes  ?

• H04L 25/03 - Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
• H04L 27/38 - Demodulator circuitsReceiver circuits
• H04B 10/61 - Coherent receivers

Abstract

A laser cladding device comprises: a wire feeder (110) and a spraying head (2). The wire feeder (110) and the spraying head (2) are integrally configured via a connecting frame (140). The spraying head (2) is disposed below the connecting frame. The wire feeder (110) is disposed on the connecting frame via the connecting frame (140). The connecting frame (140) connects the wire feeder (110) and the spraying head (2). The spraying head (2) comprises a sealed structure and a nozzle. The sealed structure comprises a support base (1), a support cover (8), and a beam splitter and a reflective focusing mirror disposed inside the support base (1) and the support cover (8). The beam splitter is coaxial with the reflective focusing mirror, and a sealed space is formed inside the spraying head. The wire feeder and the spraying head are integrally configured, and a wire is directly fed to the inside of the spraying head, shortening a distance between the wire feeder and the spraying head, such that wire feeding is stable, ensuring a high-precision cladding layer shape, and accurate dimensions.

IPC Classes  ?

• B23K 26/40 - Removing material taking account of the properties of the material involved

Abstract

Disclosed in the present invention is a network switching system for an all-optical data center. The system comprises an all-optical switching subsystem and a soft defined control subsystem. The all-optical switching subsystem comprises an optical switching unit and a plurality of OEO signal converters connected to the optical switching unit. Each OEO signal converter is also connected to an Ethernet switching device in a data center, so that high-speed interconnection is implemented among the Ethernet switching devices through the all-optical switching subsystem. The soft defined control subsystem is separately connected to the optical switching unit and each OEO signal converter and is used for collecting real-time state information of an optical switching plane and delivering a control instruction. By using the technical solution provided in embodiments of the present invention, the network switching system for an all-optical data center is established, the switching capacity can be increased, the network bandwidth can be improved, and the network delay can be reduced.

IPC Classes  ?

• H04Q 11/00 - Selecting arrangements for multiplex systems

Abstract

A laser cladding device, used for receiving an incident beam and converting the incident beam into a focused beam, so as to form a focus on a substrate. The laser cladding device comprises a support base (1) and a nozzle (2) located below the support base, the support base (1) being provided with a beam splitter mirror (3), at least two reflection focusing mirrors (4) and an adjustment bracket (5) used for fixing and adjusting the position of each reflection focusing mirror (4), the beam splitter mirror (3) receiving the incident beam and reflecting the incident beam, so as to form a reflection beam, and the reflection focusing mirrors (4) receiving the reflection beam and converting the reflection beam into the focused beam.

IPC Classes  ?

• C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer

Abstract

Disclosed is a laser cladding and forming method for a metal or alloy under partial atmosphere protection, which is as follows: a metal or alloy powder beam is conveyed by an inert carrier gas (1), and moves along with a focused laser beam (2) on a processing surface; and at least one layer of an inert protective gas is formed on the outer periphery of the metal or alloy powder beam.

IPC Classes  ?

• C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer

Abstract

Disclosed is a stopping device used for stopping inadvertent sliding of an automobile (20, 30) on an incline (40), wherein the stopping device is provided on the ground of an incline (40), and comprises a stopping pile (1), a sensing device, a driving device and a controller, the stopping pile (1) comprises a stopping latch (9) and a transmission component (10), the sensing device comprises a pressure sensor (11) and an infrared sensor (12), the sensing device and the controller are in a signal connection, the controller and the driving device are in a signal connection, and the driving device drives the stopping pile (1) to change position status. Disclosed is a stopping method comprising the sensing device acquiring data, the controller receiving data and determining to control the starting of the driving device, and the driving device controlling the stopping pile (1) to raise or flip to abut a tyre. The stopping device and method can effectively stop collisions and friction caused by inadvertent sliding.

IPC Classes  ?

• E01F 15/00 - Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollardsArrangements for reducing damage to roadside structures due to vehicular impact

Abstract

A large-range monitoring method based on deep weighted double-Q learning. The method involves: firstly, providing a robot (10) having a Q value table comprising a QA table and a QB table; secondly, an unidentified object (30) entering a large-range space (20) so as to trigger the robot (10); then, the robot (10) sensing a current state s, and determining whether the current state s is a target state; if so, the robot (10) reaching the next state and monitoring the unidentified object (30); if not, the robot (10) reaching the next state, and the robot (10) obtaining a reward value according to the next state; and the robot (10) choosing to update a QA value or a QB value equiprobably, and then updating a Q value, until the optimal monitoring policy is obtained through convergence. Not only does the method solve the problems of a limited monitoring range and a limited camera capacity, the problem of the synchronisation of a plurality of cameras also does not need to be considered, thereby reducing the cost.

IPC Classes  ?

• G05B 13/00 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
• G05D 1/12 - Target-seeking control

Abstract

Disclosed in the present invention is a metal-sulfur battery. The metal-sulfur battery comprises a positive electrode, a negative electrode, and electrolytes. The negative electrode is made of metal. The positive electrode comprises a transitional metal sulfide, or the positive electrode comprises a sulfur-containing material and a transitional metal material. The electrolytes comprise a liquid electrolyte and a solid electrolyte. The metal-sulfur battery has excellent effect on inhibiting the loss of active materials and on the shuttle effect caused by the dissolution of polysulfides in traditional metal-sulfur batteries. Even through the active substance sulfur exists in the electrolytes in the form of polysulfides, the transitional metal collector can also capture almost all of the polysulfides and make them no longer return to the electrolytes by means of the strong chemical actions of the transitional metal and the polysulfides, and a series of problems caused by the dissolution of the polysulfides is suppressed from the root, and unexpected technical results are obtained.

IPC Classes  ?

• H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
• H01M 4/36 - Selection of substances as active materials, active masses, active liquids
• H01M 10/052 - Li-accumulators

Abstract

Disclosed in the present invention is a method for use in preparing an isoxazoline derivative: an olefin derivative, a diazo derivative and tert-Butyl nitrite are used as a reaction substrate, while a copper compound is used as a catalyst; under alkaline conditions, a tandem cyclization reaction is further carried out by means of the coupling of metal carbene and free radicals so as to obtain an isoxazoline derivative. The present invention designs mild reaction conditions, and the raw materials selected are low-cost and easy to obtain, an inexpensive metal copper compound being selected as a catalyst, while the isoxazoline derivative may be conveniently synthesized directly in a sealed tubular system. The present invention avoids the use of a large amount of an oxidant, the use of a noble metal as a catalyst and the harsh water-free and oxygen-free experimental conditions of a traditional method for synthesis such that the reaction is simple and easy, while post-processing is simple, thereby having potential value in industrial application.

IPC Classes  ?

• C07D 261/04 - Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
• C07D 261/20 - Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings condensed with carbocyclic rings or ring systems
• C07D 413/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
• A01N 43/80 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms, as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2

Abstract

A modularization-based processing system for road rainwater runoff in a low impact city, the system comprising modularized curbs and a processing pool. The modularized curbs form side walls of the processing pool. The modularized curbs comprise modules A (1), modules B (2), and modules C (3). The modules C (3) are provided with an opening at an upper portion thereof. The processing pool comprises a first-stage processing pool (4), a second-stage processing pool (5), and a third-stage processing pool (6). A module C (3) is provided between the first-stage processing pool and the second-stage processing pool, and between the second-stage processing pool and the third-stage processing pool. A rainwater inlet is provided at the first-stage processing pool (4). A gravel layer (41) is provided at the rainwater inlet. Also disclosed is a modularization-based processing method for road rainwater runoff in a low impact city.

IPC Classes  ?

• E03F 5/046 - Gullies with or without odour seals or sediment traps adapted to be used with kerbs
• E03F 5/14 - Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates

Abstract

Disclosed is a device for preparing an experimental gas. The device comprises a mixing vessel (1) and several buffer vessels (2) connected in sequence. The mixing vessel (1) and the buffer vessels (2) are respectively provided with an input opening (3) and an output opening (4), with the input opening (3) being connected to a pipeline (5) extending into the respective vessel. The mixing vessel (1) is further provided with an injection opening (7) cooperating with an injector. Further disclosed is a method for preparing an experimental gas by using the device. The method comprises the following steps: (1) respectively inputting a functional liquid and a carrier gas into the mixing vessel by means of the injection opening and the input opening, so as to perform preliminary mixing, and then obtaining a mixed gas; and (2) enabling the mixed gas to successively pass through the buffer vessels so as to be sufficiently mixed, and then obtaining an experimental gas. The above-mentioned device and method are simple in operation, and the prepared experimental gas has an accurate concentration, a relatively wide range, and uniform dispersion.

IPC Classes  ?

• G01N 1/28 - Preparing specimens for investigation
• B01F 3/04 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed gases or vapours with liquids

Abstract

Disclosed is a method for preparing a borate ester on the basis of a tricyclopentadienyl rare earth metal complex, the method comprising the following steps: uniformly stirring and mixing a catalyst, a borane and a carbonyl compound for reaction to prepare a borate ester, wherein the catalyst is a tricyclopentadienyl rare earth metal complex; and the molecular formula of the tricyclopentadienyl rare earth metal complex can be expressed as: Ln(Cp)3, wherein Ln represents a rare earth metal selected from one of lanthanide elements. The preparation method has a higher catalytic activity, mild reaction conditions, a product that is easy to post-treat, a short reaction time, a low catalyst consumption amount, and a good range of applicable substrates, and can be used for industrial production.

IPC Classes  ?

• C07F 5/04 - Esters of boric acids
• B01J 31/22 - Organic complexes

Abstract

Disclosed in the present invention is a synthesis method for a spiro hydroxyindole cyclopentane β-intra-ester compound. Specifically, reactions are carried out by using phenyl-unsaturated aldehyde and unsaturated keto ester as reactants and using heterocyclic carbene as a catalyst, so as to obtain the spiro hydroxyindole cyclopentane β-intra-ester compound. In the method disclosed in the present invention, raw materials are easy to obtain, the reaction conditions are moderate, the aftertreatment is simple and convenient, the scope of applicable substrates is wide, the yield rate is high, the diastereoselectivity and enantioselectivity are high, and a synthesized product can be used as an intermediate for synthesizing drugs and pesticides.

IPC Classes  ?

• C07D 491/107 - Spiro-condensed systems with only one oxygen atom as ring hetero atom in the oxygen-containing ring
• B01J 31/02 - Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
• A61P 31/00 - Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics

Abstract

A multifunctional composite coating for removing formaldehyde and undesirable odors and preventing bacteria and mildew comprises functional micro-nano powders, a resin adhesive and additives. The powders comprise nano-scale Anatase titanium dioxide, micrometer-scale porous diatomite, micrometer-scale adsorption carbon and micrometer-scale calcium carbonate. The additives comprise a surfactant and a dispersant. In the preparation, the powders are added into the resin adhesive, and then the additives are added and stirred. The coating can remove formaldehyde and undesirable odors and prevent bacteria and mildew on a day and a night that has no light.

IPC Classes  ?

• C09D 175/04 - Polyurethanes
• C09D 163/00 - Coating compositions based on epoxy resinsCoating compositions based on derivatives of epoxy resins
• C09D 5/14 - Paints containing biocides, e.g. fungicides, insecticides or pesticides
• C09D 7/12 - Other additives

Abstract

Disclosed in the present invention is a rapid and efficient method for screening microcystin degrading bacteria, comprising primer pair design, polymerase chain reaction (PCR) amplification, and product detection: designing a primer pair as shown in SEQ ID NO:1 and SEQ ID NO:2; using the DNA of a microcystin degrading bacteria to be screened as a template, performing PCR amplification by using the primer pair to obtain an amplification product; detecting the amplification product and completing screening of the microcystin degrading bacteria according to a detection result.

IPC Classes  ?

• C12Q 1/68 - Measuring or testing processes involving enzymes, nucleic acids or microorganismsCompositions thereforProcesses of preparing such compositions involving nucleic acids
• C12Q 1/04 - Determining presence or kind of microorganismUse of selective media for testing antibiotics or bacteriocidesCompositions containing a chemical indicator therefor

Abstract

Provided is a driving device used for magnetic resonance elastography of an animal and an extra-corporeal sample, the driving device comprising a base (10), and the base (10) being provided with a piezoelectric driver and an animal/sample mounting mechanism driven by the piezoelectric driver, wherein the piezoelectric driver comprises a hollow oval beam (21) and a piezoelectric ceramic sheet (22) arranged along a long axis of the oval beam (21), two ends of the piezoelectric ceramic sheet (22) are respectively connected to two ends of the oval beam (21) that correspond to the long axis thereof, and two ends of the oval beam (21) that correspond to a short axis are power output ends (23); and the mounting mechanism comprises a driver connecting member (31) connected to one of the power output ends (23), a driving rod (32) connected to the driver connecting member (31), an anaesthesia ferrule (33) sheathed at an end portion of the driving rod (32), and two adjusting brackets (34) arranged on the base (10), respectively located on two sides of the driving rod (32), and used for adjusting a mounting position of the animal/sample, wherein end portions of the two adjusting brackets (34) extend beyond an end portion of the anaesthesia ferrule (33), the end portions of the adjusting brackets (34) extending beyond the anaesthesia ferrule (33) are animal head fixing ends, and the fixing ends are provided with several fixing holes (35). The driving device is simple in structure and has a relatively high power transmission efficiency.

IPC Classes  ?

• A61B 5/055 - Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fieldsMeasuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging

Abstract

Disclosed is the use of a 4,6-dimethyl-2-mercaptopyrimidine monovalent copper complex in the catalysis of a ketone or aldehyde hydrogen transfer reaction for preparing an alcohol, wherein the following steps are comprised: under the protection of an inert gas, a reactant, i.e. an aldehyde or a ketone, an alkali and a catalyst are added, according to a molar ratio, into a reaction container equipped with a stirring device, isopropanol is then added, and same are stirred and reacted at 80℃-120℃ for 20-30 hours to obtain an alcohol compound. A 4,6-dimethyl-2-mercaptopyrimidine ligand monovalent copper complex is used as a catalyst, and isopropanol is used as a solvent and a reducing agent, thereby not only avoiding the use of a toxic phosphine-containing ligand, but also not using a precious metal, thus greatly reducing the cost. The whole process is green, efficient and easy to operate, and is a good method for synthesizing an alcohol.

IPC Classes  ?

• B01J 31/22 - Organic complexes
• C07C 29/143 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen-containing functional group of C=O containing groups, e.g. —COOH of ketones
• C07C 29/14 - Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen-containing functional group of C=O containing groups, e.g. —COOH of a —CHO group

Abstract

A pertechnetate adsorbent and the synthesis process thereof, and the use thereof in the treatment of radioactive wastewater, comprising the steps of: a hydrothermal reaction being carried out by using silver nitrate and tetrakis[4-(1-imidazolyl) phenyl]methane as raw materials, and an organic solvent and water as a medium; and after the reaction, the reaction solution is washed and filtered, and the resulting filter cake is dried to obtain the pretechnetate adsorbent. The pertechnetate adsorbent has a porous three-dimensional infinite extension structure, with free nitrates contained in the pores, wherein same can effectively be exchanged with pertechnetates, thereby efficiently treating radioactive wastewater.

IPC Classes  ?

• C02F 1/28 - Treatment of water, waste water, or sewage by sorption

Abstract

A method for treating selenate-containing wastewater, comprising: firstly adjusting the pH of the selenate-containing wastewater to be not less than 7; then introducing an adsorbent into the selenate-containing wastewater at a solid-liquid ratio of 1.5-2.5g/L, and stirring for 10-15 hours; finally removing the adsorbent, so as to complete the treatment of the selenate-containing wastewater; and the adsorbent being Y2(OH)5Cl·1.5H2O. Also disclosed is the use of Y2(OH)5Cl·1.5H2O in water treatment and the use of Y2(OH)5Cl·1.5H2O as an adsorbent in treating selenate-containing wastewater. The adsorbent material is a two-dimensional laminated material, wherein the laminate is positively charged, with free chlorine ions therebetween, wherein same can effectively remove the selenate, and the removal rate of selenate in selenate wastewater is as high as 99.9%, thus having a good recycling effect.

IPC Classes  ?

• C02F 1/28 - Treatment of water, waste water, or sewage by sorption
• B01J 20/06 - Solid sorbent compositions or filter aid compositionsSorbents for chromatographyProcesses for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group

Abstract

A biomechanical test method for an environmental pH, comprising the following steps: selecting cell or tissue samples in different pH environments and different incubation time, measuring the mechanical properties of the samples by means of an AFM tester, and establishing a mapping relation between the mechanical properties of the cells or tissues and the pH environment; performing an extrusion test by means of the AFM tester to obtain an extrusion mechanical property curve; observing the extrusion mechanical property curve and selecting a corresponding elastic modulus calculation method to calculate an elastic modulus E; establishing and fitting a function or a table E=E(pH, t); establishing, according to the function or the table of E(pH, t), the mapping relation between pH based on the measured E value, and the growth time; and selecting the cells or tissues required to be detected in the pH environment, measuring the elastic modulus E of the cells or tissues, and discovering the corresponding environment pH value and the incubation time information from the mapping relation.

IPC Classes  ?

• G01Q 60/24 - AFM [Atomic Force Microscopy] or apparatus therefor, e.g. AFM probes

Abstract

Provided are a biomass-based epoxy resin and method for preparation thereof; under conditions of N,N-dimethylformamide as a catalyst, 2,5-furandicarboxylic acid and thionyl chloride are acylated to obtain 2,5-furan diformyl chloride; then it is dissolved with dichloromethane; under tertiary amine conditions an esterification reaction takes place, and bis(4-allyl-2-methoxyphenyl)furan-2,5-dicarboxylic acid ester is thus obtained; by means of meta-chloroperoxybenzoic acid, its unsaturated double bond is epoxidized to obtain a biomass-based epoxy resin. The process of the present invention is simple; the raw materials come from biomass 2,5-furandicarboxylic acid and eugenol; in comparison with bisphenol-A epoxy resin based on petroleum and coal resources, the raw materials are green and renewable, and are advantageous to reducing the consumption of renewable resources with regard to polymeric material. The obtained cured epoxy resin has excellent thermal properties and modulus, and has broad prospects for application.

IPC Classes  ?

• C08G 59/24 - Di-epoxy compounds carbocyclic
• C07D 307/68 - Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
• C07D 407/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings

Abstract

Provided are a bismaleimide resin and method for preparation thereof; under conditions of N,N-dimethylformamide serving as a catalyst, biomass-based 2,5-furandicarboxylic acid and thionyl chloride are acylated to obtain 2,5-furan diformyl chloride, which is then dissolved in dichloromethane with a biomass-based eugenol; under tertiary amine conditions an esterification reaction takes place, and a whole-biomass-based bis(4-allyl-2-methoxyphenyl)furan-2,5-dicarboxylic acid ester is thus obtained; same is used for preparing a modified bismaleimide resin. The bismaleimide resin prepared by the present invention has excellent thermal properties and rigidity; the preparation method uses 2,5-furandicarboxylic acid from biomass as well as eugenol; the raw materials are green and environmentally friendly and renewable; the invention also has the feature of a simple production process, and has broad prospects for application in such fields as aeronautics and astronautics, electronic information, electrical insulation.

IPC Classes  ?

• C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors

Abstract

Disclosed are a biomass-based phosphate flame retardant and a preparation method thereof comprising: forming an eugenol salt suspensoid from a whole biomass eugenol in the present of a strong alkali metal base: adding dropwisely a solution of phosphorus oxychloride in methyl chloride into the eugenol salt suspensoid, and after the reaction finished, wanshing, and removing the solvent by rotary evaporation to obtain the biomass-based phosphate flame retardant in a liquid form at room temperature. The biomass-based phosphate flame retardant disclosed in the present invention has a biomass content up to 91.2%, and contains allyl group, and thus can be copolymerized with various materials to improve the compatibility between the flame retardant and the material. The prepared flame-retardant polymer material has excellent flame retardancy. The preparation method of the invention has the advantages of simple process, short synthesis cycle, high yield, green renewable raw materials, which is favorate for reducing consumption of non-renewable petroleum and coal resources required by organic phosphate flame retardants, and thus has application prospect.

IPC Classes  ?

• C08K 5/523 - Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds

Abstract

Disclosed are a flame-retardant bismaleimide resin and a preparation method thereof comprising: forming an eugenol salt suspensoid from a whole biomass eugenol in the present of a strong alkali metal base, adding dropwisely a solution of phosphorus oxychloride in methyl chloride to react to obtain a biomass-based phosphate flame-retardant; mixing bismaleimide, 2,2'-diallylbisphenol with the obtained phosphate, curing and posttreating to obtain the flame-retardant bismaleimide resin. Compared with petroleum-based bismaleimide resin, the flame-retardant bismaleimide resin prepared by the present invention is obtained from eugenol derived from biomass, and the raw material is green and renewable. It maintains mechanical properties and processing properties of the petroleum-based bismaleimide resin and has an excellent flame- retardant property. The preparation method provided by the invention has the advantages of low cost and simple production process, and has wide application prospect in the fields of aerospace, electronic information, electrical insulation and the like.

IPC Classes  ?

• C08G 73/10 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors

Abstract

A tester for micromechanical properties of a biological soft tissue, comprising: a support, the support being provided thereon with a sample test platform (21), a pressure test head (22) facing the sample test platform (21) and a drive mechanism driving the pressure test head (22) to move towards/away from the sample test platform (21); a miniature force testing assembly, the miniature force testing assembly comprising a first conduit (31), a first piston (32) actively connected to the first conduit (31) and supporting the sample test platform (21), a second conduit (33), a second piston (34) actively connected to the second conduit (33), a pressure-amplifying platform (35) connected to the second piston (34), and a force sensor (36) for testing the force of the pressure-amplifying platform (35), the first conduit (31) and the second conduit (33) being connected by means of a hose, and the cross-sectional area of the sample test platform (21) being smaller than the cross-sectional area of the pressure-amplifying platform (35). A micro force is amplified using the principle of hydraulic amplification, and a micro displacement is amplified using the principle of lever amplification so as to test the micro force and the micro deformation of a biological soft tissue.

IPC Classes  ?

• G01N 3/06 - Special adaptations of indicating or recording means

Abstract

Disclosed is an intraventricular pulsatile blood pump. A pulsatile blood pump (2) is fixedly arranged at the cardiac apex inside a ventricle (1) so as to generate an open-type pulsatile effect. The pulsatile blood pump (2) is generally of a jellyfish shape, comprising a bell-shaped body (5) and a driving source, with an opening of the bell-shaped body (5) being opposite to an outlet of the ventricle (1), the driving source driving the bell-shaped body (5) to perform systolic or diastolic movements. The systolic or diastolic movements of the bell-shaped body (5) drive the blood inside the ventricle (1) to be ejected directionally to an artery and to form a swirl type blood flow field between an inner wall of the bell-shaped body (5) and an inner wall of the ventricle (1). The open-type pulsatile effect not only provides pulsatile blood flow to assist the function of the ventricle (1), but also optimizes the flow field and pressure distribution inside the ventricle (1). The intraventricular pulsatile blood pump has better biocompatibility as compared with existing blood pumps.

IPC Classes  ?

• A61M 1/12 - Blood pumps; Artificial hearts; Devices for mechanical circulatory assistance, e.g. intra-aortic balloon pumps implantable into the body

Abstract

A laser broadband cladding device, used for converting and projecting a laser beam emitted by a laser onto a processing surface (20) to be used in broadband laser cladding processing, the laser broadband cladding device comprising a reflection mirror (2) and a double surface reflection part (3). The reflection mirror (2) reflects the laser beam to the double surface reflection part (3). The double surface reflection part (3) comprises an upper reflection surface (31) and a lower reflection surface (32) which is located below the upper reflection surface (31); the upper reflection surface (31) is a paraboloid focusing surface and the lower reflection surface (32) is a plane; the upper reflection surface (31) receives and reflects a laser beam onto a processing surface (20) to form a cladding spot (30); the lower reflection surface (32) receives and reflects a laser beam to form a preheat slow-cooling spot (40) on the processing surface, and the preheat slow-cooling spot (40) is located at an outer side of the cladding spot (30). The present invention may meet thermal treatment requirements for processes of different materials and structures, and reduce residual thermal stress of a clad layer and probability of defects such as a crack.

IPC Classes  ?

• C23C 24/10 - Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
• B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
• G02B 27/10 - Beam splitting or combining systems

Abstract

A low frequency random vibration-oriented electromagnetic energy harvester comprises a stator magnet (3) and a rotor magnet (4). Taking advantage of mutual attraction between magnets and in case of the low frequency random vibration in the external environment, the rotor magnet produces a relative motion with electromagnetic coils (2) distributed circumferentially while rotating about the stator magnet, thereby generating electrical energy output, and achieving high efficiency energy harvesting. The electromagnetic energy harvester is applicable to energy harvesting in a variety of complex random vibration environments, and has a low operating frequency, a wide frequency band, and a wide usage range.

IPC Classes  ?

• H02K 35/02 - Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems

Abstract

An error proofing system for an assembly line electric screwing gun, comprising an upper computer (12) used for obtaining information on a vehicle to be processed from a preset product processing database and sending the information on the vehicle to be processed to a screwing gun control module (11); the screwing gun control module (11) used for receiving the information on the vehicle to be processed and sending corresponding screwing data information to a screwing gun according to the information on the vehicle to be processed, such that a worker controls, according to the screwing data information, the screwing gun to work; and a video monitoring and analyzing module (13) used for taking an operation video of the worker operating the screwing gun on site, obtaining a video frame at a preset time interval from the operation video, performing image template analysis and comparison on the video frame and a pre-stored operation process picture, and triggering an alarm to start if the video frame is inconsistent with the operation process picture. By means of monitoring an assembly line in real time, the error proofing system for an assembly line electric screwing gun can remind a worker of an abnormal operation and thus has an alarming and correcting function to the worker.

IPC Classes  ?

• G08B 21/00 - Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
• B23P 19/06 - Screw or nut setting or loosening machines

Abstract

Disclosed is a method for preparing a silicon carbide nanowire through vacuum sintering, comprising the following steps: step (1): firstly mixing Si and SiO2 to obtain a silicon mixture, and then mixing the silicon mixture with graphene to obtain a mixed raw material; step (2): placing the mixed raw material into a high-temperature vacuum sintering furnace, exhausting oxygen and vacuumizing; and step (3): sintering the mixed raw material under a vacuum state in the high-temperature vacuum sintering furnace, firstly heating same to 1400ºC-1500ºC from room temperature within 2.5-3 h, then maintaining the temperature for 2-2.5 h, and finally, cooling same to room temperature within 2.5-3 h, so as to obtain the silicon carbide nanowire prepared through vacuum sintering. The method has a high preparation efficiency, and the shape of the prepared silicon carbide nanowire is relatively good.

IPC Classes  ?

• B01J 27/224 - Silicon carbide
• B82Y 40/00 - Manufacture or treatment of nanostructures
• C01B 32/956 - Silicon carbide

Abstract

Provided is a surface strengthening method by laser shock on a graphene or graphene oxide coating, comprising the following steps: applying a solution of graphene, graphene oxide, or a mixture of graphene and graphene oxide to a material matrix surface to be strengthened, so as to form a coating; providing aluminium foil on the coating as an absorber layer; providing optical glass or silica gel on the absorber layer as a constraining layer; performing laser shock scanning on the absorber layer by using pulsed laser; naturally cooling the material matrix after laser shock to room temperature, and removing residues on the material matrix to obtain a material matrix having a well strengthened surface.

IPC Classes  ?

• C23C 24/08 - Coating starting from inorganic powder by application of heat or pressure and heat

Abstract

A method for preparing an antitumor drug, comprising the following steps: (1) adding a polymer tetrazole derivative and a crosslinking agent containing methacrylate group to water or a buffer to obtain a carrier solution having a concentration of 0.5-10 mg/mL; (2) adding a protein drug to the carrier solution to obtain a mixed solution; (3) injecting the mixed solution into an organic solvent to obtain a suspension, and then carrying out an ultraviolet irradiation reaction to obtain the antitumor drug.

IPC Classes  ?

• A61K 47/34 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
• A61K 38/00 - Medicinal preparations containing peptides
• A61P 35/00 - Antineoplastic agents

Abstract

Provided is an application of a β-diimide bivalent rare earth borohydride complex for catalyzing a hydroboration reaction between a borane and a ketone. A β-diimide rare earth dichloride is reacted with NaBH4 in a tetrahydrofuran solution, and then undergoes in-situ Na/K chemical reduction to obtain a β-diimide bivalent rare earth borohydride complex: [2,6-ipr2-(C6H3)-NC(Me)CHC(Me)N-(C6H3)-2,6-ipr2]Ln-BH4∙2THF. The β-diimide bivalent rare earth borohydride complex can provide, under mild conditions, a highly active catalytic effect for a hydroboration reaction between a borane and a ketone. The invention provides a short reaction time, can be used under mild conditions, and has a simple and convenient post-treatment method.

IPC Classes  ?

• C07F 5/00 - Compounds containing elements of Groups 3 or 13 of the Periodic Table
• C07F 5/02 - Boron compounds
• C07F 5/04 - Esters of boric acids
• B01J 31/22 - Organic complexes

Abstract

An application of a trisilicon amine rare earth complex for catalyzing hydroboration reaction between an aldehyde and a borane. The trisilicon amine complex La[N(SiMe3)2]3 can provide, under mild conditions, a highly catalytic effect for a hydroboration reaction between an aldehyde and a borane. The usage volume of a catalyst is only 0.1-0.5% of the molar quantity of the aldehyde. The reaction has a very fast reaction speed and reaches a yield exceeding 90% after a 10-minute reaction. When compared to a catalytic system of the prior art, the invention uses less catalyst, improves yield, requires less time, and can be used under mild conditions.

IPC Classes  ?

• C07F 5/04 - Esters of boric acids
• B01J 31/22 - Organic complexes

Abstract

An application of a bis(β-diimide) rare earth amide for catalyzing a hydroboration reaction between a ketone and a borane. The molecular formula of a catalyst is [2‑Me‑C6H4‑NC(Me)CHC(Me)N‑C6H4‑2‑Me]2LnN(SiMe3)2, wherein Ln represents a rare earth metal selected from either Nd or Pr. The catalyst can achieve an addition reaction between a borane and a ketone within a short period of time (8-10 minutes) under mild conditions (room temperature) and can provide an extremely high yield. The invention is the first embodiment using a rare earth compound for catalyzing a reaction.

IPC Classes  ?

• B01J 31/22 - Organic complexes
• C07F 5/04 - Esters of boric acids

Abstract

The present invention relates to the technical field of optical instrument detection, in particular to a method for detecting shapes of cylindrical surfaces in a non-contact interference manner. Disclosed are a method and apparatus for detecting concave cylindrical surfaces and cylindrical diverging lenses. In the present technical solution, a cylindrical converging lens (4) and a cylindrical diverging lens (3) are respectively combined with a cylindrical surface to be tested (1); combined wave surface error data of the cylindrical diverging lens (3) and the cylindrical surface to be tested (1), as well as combined wave surface error data of the cylindrical converging lens (4) and the cylindrical surface to be tested (1) are obtained by means of interference measurement, and then the combined wave surface error data of the cylindrical diverging lens (3) and the cylindrical converging lens (4) are obtained by means of interference measurement; surface shape error data of the cylindrical surface to be tested (1), the cylindrical diverging lens (3) and the cylindrical converging lens (4) are respectively obtained by using a difference algorithm and a wave surface restoration algorithm. According to the present invention, the detection light path is simple, and high-precision surface shape detection of cylindrical surfaces is made possible without using high-precision and high-measurement performance gauges. The method and apparatus are especially applicable to cylindrical surface processing in the optical processing field.

IPC Classes  ?

• G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures

Abstract

The present invention relates to the technical field of optical instrument detection, in particular to a method for detecting shapes of cylindrical surfaces in a non-contact interference manner. Disclosed are a method and apparatus for detecting cylindrical surfaces and cylindrical converging lenses. Two converging lenses (3,4) which can modulate parallel light into cylindrical light waves are respectively used in combination with a cylindrical surface to be tested; combined wave surface error data of the converging lenses (3,4) and the cylindrical surface to be tested are obtained by means of testing; the two cylindrical converging lenses (3,4) are combined, so that the combined wave surface error data of the two cylindrical converging lenses (3,4) are obtained; and surface shape error data of a cylindrical surface (1) to be tested and the two cylindrical converging lenses (3,4) are obtained respectively by using a difference algorithm and a wave surface restoration algorithm. According to the present invention, the detection light path is simple, and high-precision surface shape detection of the cylindrical surface is made possible without using high-precision and high-measurement performance gauges. The method and apparatus are especially applicable to cylindrical surface processing in the optical processing field.

IPC Classes  ?

• G01B 11/24 - Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures

Abstract

Provided are an Titanium film application and a silicon-based optical waveguide with the same. The titanium film is used for reducing and even completely eliminating reflection of an electromagnetic wave of a near-infrared band. According to the invention, the titanium film that is used as an anti-reflecting film for the electromagnetic wave of a near-infrared band has properties of broad band of 1000nm to 2200nm, wide angle, and ultra-thin; and the preparation method of the film is simple and the preparation cost is low. Because of the ultra-thin property of the film, the weight of the anti-reflection device can be reduced and the cost of the anti-reflection device is saved; and the device can be carried conveniently. Besides, in order to realize anti-reflection effects for different dielectric substances, only the thickness of the titanium film needs to be adjusted, so that the film can be applied widely. In addition, because a titanium film covers the end surface of a silicon-based optical waveguide, reflection of the end surface of the silicon-based optical waveguide can be reduced substantially and thus the standing wave in the silicon-based optical waveguide can be reduced substantially, so that the influence of the reflecting waves on other devices in the optical path can be reduced substantially and stability of the optical path system is guaranteed.

IPC Classes  ?

• G02B 1/113 - Anti-reflection coatings using inorganic layer materials only
• G02B 6/122 - Basic optical elements, e.g. light-guiding paths

Abstract

A method for preparing a gel for use in three-dimensional dose verification of radiotherapy, the method comprising the following steps: mixing an oil-soluble polymeric monomer with water to obtain a first solution; deaerating the mixture, and putting the mixture in a γ-ray source for irradiation crosslinking so as to obtain a second solution containing a polymer; centrifuging the solution, and lyophilizing the solution to obtain a solid polymeric microsphere powder; mixing the solid polymeric microsphere powder with a radiation luminescence monomer in water to obtain a third solution; dissolving a water-soluble polymeric monomer in water to obtain a fourth solution; mixing the third solution and the fourth solution; deaerating the mixture; and putting the mixture in a γ-ray source for irradiation crosslinking so as to obtain a gel.

IPC Classes  ?

• C08F 112/08 - Styrene
• C08F 112/12 - Hydrocarbons containing a branched unsaturated aliphatic radical or an alkyl radical attached to the ring
• C08F 112/06 - Hydrocarbons
• C08F 257/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group on to polymers of styrene or alkyl-substituted styrenes
• C08F 257/00 - Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group
• C08F 220/56 - AcrylamideMethacrylamide
• C08F 220/06 - Acrylic acidMethacrylic acidMetal salts or ammonium salts thereof
• C08J 3/28 - Treatment by wave energy or particle radiation
• C08J 3/24 - Crosslinking, e.g. vulcanising, of macromolecules
• C08J 3/075 - Macromolecular gels
• A61N 5/10 - X-ray therapyGamma-ray therapyParticle-irradiation therapy
• A61K 47/30 - Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates