A hollow embolic microsphere, a preparation method, and a pharmaceutical composition and use thereof, wherein: the hollow embolic microsphere is a microsphere prepared using a polymer material and having a unique shape and structure, and is suitable for transcatheter arterial embolization. The hollow embolic microsphere of the present disclosure can enter channels having different sizes, and has embolization effects on various target positions. The hollow microsphere is internally porous and has drug loading abilities, and drug release when loading drug can be easily controlled and the treatment effect is good. No emulsifier or surfactant is needed in the preparation of the hollow microsphere, reaction conditions are mild, and the process is simple. The obtained microsphere has a uniform shape and a controllable size, and is capable of controlling the embolization time. Various drugs including protein heat-sensitive drugs can be loaded, and the drug encapsulation efficiency can reach more than 70%.
Provided is a modified cellulose, a preparation method and application thereof. The modified cellulose includes a flame retardant cellulose ester film, and the preparation method includes: obtaining a homogeneous cellulose solution by adding a cellulose to an ionic liquid cosolvent system; obtaining a cellulose phosphite ester solution by adding dimethyl phosphite and a catalyst to the homogeneous cellulose solution for performing a transesterification; obtaining cellulose phosphite ester powder by regeneration solvent precipitation, washing, centrifugation, and drying of the cellulose phosphite ester solution; and obtaining the flame retardant cellulose ester film by evaporating solvent after dissolving the cellulose phosphite ester powder in dimethyl sulfoxide.
The invention provides a composite catalyst material and a preparation method and application thereof, and relates to the technical field of water environment treatment. The preparation method comprises the following steps: (1) adding an alkaline aqueous solution into microplastics, and then adding an accelerator for a hydrolysis reaction to obtain a first reaction solution; (2) adding acid into the first reaction solution to adjust pH to be acidic, and then adding ferric chloride for a solvothermal reaction to obtain a second reaction solution; and (3) carrying out post-treatment on the second reaction solution to obtain the composite catalyst material. The invention solves the technical problem of low resource utilization rate of microplastic degradation in the prior art.
The present disclosure discloses a bias control device and method based on pulse phase stabilization for adaptive Mach-Zehnder modulator. The device includes a mode-locked femtosecond laser, a Mach-Zehnder modulator, an optical fiber coupler, a photodetector, an amplifying filter, an analog-to-digital converter, an FPGA bias control module, a digital-to-analog converter, a bias amplifier, and an electrical pulse generator. The FPGA bias control module demodulates the amplitude of the high-frequency signal to determine and output the initial bias value, setting the operating point of MZM at the Null point. Simultaneously, the low-frequency signal phase at this moment is demodulated as the target value and compared with the demodulated phase of the real-time updated low-frequency signal to generate an error signal. Through PID, the bias voltage is adjusted in real time to achieve stability at the Null point.
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
G02F 1/21 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference
G02F 1/225 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference in an optical waveguide structure
The disclosure relates to the technical field of fabric printing, in particular to a waterless digital printing method, which includes: scanning and detecting a surface to be printed of a target fabric and determining a first type hydrophilic detection point and a second type hydrophilic detection point of the target fabric according to a yarn type; performing a primary hydrophilic detection on the first type hydrophilic detection point and the second type hydrophilic detection point and calculating a hydrophilicity stability parameter; determining a fabric preheating mode according to the hydrophilicity stability parameter, the fabric preheating mode including differential temperature preheating and uniform temperature preheating; performing digital ink-jet printing on the target fabric by a digital printing device when preheating is completed; and performing drying and curing in which the printed target fabric is placed into a drying chamber for heating and curing.
B41J 3/407 - Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
B41J 11/00 - Devices or arrangements for supporting or handling copy material in sheet or web form
6.
JOINT OPTIMIZATION METHOD FOR TASK OFFLOADING AND CONTAINER CACHING IN CONTAINERIZED EDGE COMPUTING
The present invention relates to the technical fields of task offloading and container caching. Disclosed is a joint optimization method for task offloading and container caching in containerized edge computing. The specific process is as follows: first, on the basis of a containerized edge computing environment, establishing a mathematical model; then, on the basis of the mathematical model, establishing a joint optimization problem of non-linear 0-1 programming; and finally solving a non-linear 0-1 programming problem. According to the present invention, a mathematical model of a containerized edge computing environment is established, and an optimization problem for minimizing the task processing time of a terminal device is established. In addition, the joint optimization method for task offloading and container caching is provided, and according to the method, a non-linear 0-1 programming problem which is originally difficult to solve is converted by means of an equivalent conversion method into a linear 0-1 programming problem which is easy to solve, thereby solving the problem of mutual coupling of a caching decision and a task offloading decision in edge computing, and reducing image file download time and container start time in a containerized edge computing system, so as to reduce the task processing time of terminal devices.
Disclosed in the present invention are an apparatus and method for performing bias control on an adaptive Mach-Zehnder modulator (MZM) on the basis of pulse phase stability. The apparatus comprises a mode-locking femtosecond laser, an MZM, an optical fiber coupler, a photoelectric detector, an amplification filter, an analog-to-digital converter, an FPGA bias control module, a digital-to-analog converter, a bias amplifier and an electric pulse generator, wherein the FPGA bias control module demodulates a high-frequency signal amplitude and outputs an initial bias value, sets an MZM working point at a Null point, and also demodulates a low-frequency signal phase at this moment as a target value, compares same with a low-frequency signal demodulation phase which is updated in real time, so as to generate an error signal, and adjusts a bias voltage in real time by means of PID, so as to realize the stability at the Null point. In the present invention, a method for maintaining pulse phase stability is used to stabilize an MZM at a Null point, without introducing additional noise, thereby improving the bias control precision, ensuring the long-term stability of a working point, and realizing a high-extinction-ratio output of laser pulses at any frequency.
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
8.
DEEP LEARNING-BASED DIGITAL HOLOGRAPHIC CONTINUOUS PHASE NOISE REDUCTION METHOD FOR MICROSTRUCTURE MEASUREMENT
A deep learning-based digital holographic continuous phase noise reduction method for microstructure measurement is provided. A MEMS microstructure is simulated to generate an object phase image through generation of random matrix superposition, noise in a digital holographic continuous phase map is simultaneously simulated to generate a noise grayscale image, and a simulation data set is thus created. An end-to-end convolutional neural network is designed, and a trained convolutional neural network is trained and obtained. A holographic interference pattern of an object under measurement is collected by photographing, and after spectrum extraction, angular spectrum diffraction, phase unwrapping, and distortion compensation, a continuous phase map containing only the object phase and noise is obtained and input into the trained convolutional neural network to obtain an object phase map. A simulation data set is accurately created in the disclosure, thereby the difficulty of collecting a large amount of experimental data is avoided.
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
G03H 1/16 - Processes or apparatus for producing holograms using Fourier transform
9.
MICROSTRUCTURE MEASUREMENT DIGITAL HOLOGRAPHIC CONTINUOUS PHASE NOISE REDUCTION METHOD BASED ON DEEP LEARNING
Disclosed in the present invention is a microstructure measurement digital holographic continuous phase noise reduction method based on deep learning. The method comprises: simulating a MEMS microstructure by means of a random matrix generation and superposition mode to generate an object phase image, simultaneously simulating noises in a digital holographic continuous phase diagram to generate a noise grayscale image, and further making a simulation data set; designing an end-to-end convolutional neural network, and training same to obtain a trained convolutional neural network; and collecting a holographic interferogram of a measured object by means of photographing, carrying out spectrum extraction, angular spectrum diffraction, phase unwrapping and distortion compensation to obtain a continuous phase diagram only containing an object phase and noises, and inputting the continuous phase diagram into the trained convolutional neural network to obtain an object phase diagram. The present invention accurately makes the simulation data set so as to avoid the difficulty of requiring collection of a large amount of experimental data, and adds a subspace projection module into a network structure, greatly improving the noise reduction performance, and reducing the number of network parameters, thus having the advantages of high operational speed and good noise reduction performance.
MODERN TEXTILE TECHNOLOGY INNOVATION CENTER (JIANHU LABORATORY) (China)
ZHEJIANG BOAO NEW MATERIALS CO., LTD (China)
ZHEJIANG UNIVERSITY OF TECHNOLOGY SHANGYU INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE CO., LTD (China)
ZHEJIANG SCI-TECH UNIVERSITY (China)
Inventor
Qi, Dongming
Cui, Zhihua
Guo, Lixue
Huang, Junfeng
Song, Lixiang
Shang, Zuzheng
Abstract
The present invention belongs to the field of dyes, and particularly relates to a sun-resistant green liquid disperse dye and a preparation method therefor. The formula of the sun-resistant green liquid disperse dye of the present invention comprises the following components, in percentages by weight: 5-24% of a yellow dye, 6-25% of a blue dye, 9-11% of a composite dispersing agent and the balance of water, wherein the sum of the weight of the yellow dye and the blue dye accounts for 28-32% of the total weight of the sun-resistant green liquid disperse dye. The sun-resistant green disperse dye of the present invention overcomes the defects of serious wastewater pollution, dust pollution, etc., of a powdery disperse dye, has good color fastness to sun, and also enriches green varieties lacking in disperse dyes.
The present invention relates to the technical field of water environment treatment, and provides a composite catalyst material and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) adding an alkaline aqueous solution to micro-plastics, and then adding an accelerator to perform a hydrolysis reaction, so as to obtain a first reaction solution; (2) adding an acid to the first reaction solution to adjust the pH until acidic, and then adding ferric chloride to perform a solvothermal reaction, so as to obtain a second reaction solution; and (3) subjecting the second reaction liquid to a post-treatment to obtain a composite catalyst material, such that the technical problem of the low resource utilization rate of micro-plastic degradation in the prior art is solved.
In a digital holographic wrapped phase aberration compensation method based on deep learning, a random Zernike polynomial coefficient and a corresponding wrapped phase map are generated by a computer and are respectively treated as a learning label and a network to train a neural network model. A digital holographic optical setup is built to record a hologram of a sample to be measured, the wrapped phase map is inputted into the trained neural network model after numerical reconstruction, and the Zernike polynomial coefficient is outputted to reconstruct a phase aberration distribution and to compensate complex amplitude in a spatial domain. Phase filtering and unwrapping are performed on the compensated wrapped phase map, and Zernike polynomial fitting based on background segmentation is performed on the unwrapped phase to compensate for residual aberration.
A method for predicting, regulating and controlling a wear characteristic of a flow channel in a valve. The method comprises: pasting an aluminum sheet in a valve core, and testing a wear rate; regulating inlet pressure, and obtaining distribution characteristics of a pressure field and a velocity field; establishing an association relationship between the wear rate and pressure and a flow velocity; increasing the inlet pressure, and drawing a discrete data curve and a continuous curve; obtaining a discrete data change curve and a continuous curve of the wear rate along with an opening degree of the valve core; obtaining an association relationship graph between the wear rate of the aluminum sheet and the inlet pressure and the opening degree of the valve core; and performing comparison and determination on a real-time wear rate actual value of the aluminum sheet and a critical wear rate value.
Disclosed is a method for identifying and eliminating ammonium salt deposition characteristics in a pipe of a hydrogenation air cooler. A multiphase flow medium enters an inlet pipe box of a hydrogenation air cooler; cross sections and temperature transmitters are arranged on a pipe bundle of the air cooler in the axial direction; a temperature signal value is monitored and transmitted to a single-chip microcomputer for analysis; an infrared thermal imager performs photographing, and transmits data to determine that an ammonium salt deposition risk is present under this working condition; a monitored temperature value is calculated, an ammonium salt deposition risk identification model is established, and ammonium salt deposits are peeled off from the inner wall of the pipe bundle of the air cooler by means of vibration of the pipe bundle caused by the intermittent frequent switching-on/switching-off of an electromagnet and a magnetic block, and ultrasonic signals.
The invention relates to the technical field of detecting ancient silk fabric, and in particular to a preparation method for an immunomagnetic bead test strip for rapidly detecting trace protein in cultural relics, and to an application thereof. The preparation method comprises the following steps: (1) performing a coupling reaction between carboxyl magnetic beads and protein antibodies, performing magnetic separation to remove supernatant, and successively washing in buffer solution and cleaning agent to obtain immunomagnetic beads; (2) spraying the immunomagnetic beads onto a pretreated nitrocellulose membrane, and drying for later use; respectively spraying a diluted antibody solution I and a diluted antibody solution II onto a detection line and a quality control line of the nitrocellulose membrane, and drying for later use; (3) successively assembling a sample pad, an immunomagnetic bead combination pad, the nitrocellulose membrane, and an absorbent pad, and cutting, to obtain immunomagnetic bead test strips, then drying, sealing, and storing. The prepared test strip enriches trace proteins while simultaneously achieving rapid and sensitive detection, is convenient to operate on archaeological sites, and is less time consuming.
A digital holographic wrapped phase distortion compensation method based on deep learning. The method comprises: generating, by means of a computer, a random Zernike polynomial coefficient and a corresponding wrapped phase map that are respectively used as a learning label and a neural network model for network training; building a digital holographic optical path to record a hologram of a sample to be tested, after numerical reconstruction, inputting a wrapped phase map of said sample into the trained neural network model, outputting the Zernike polynomial coefficient to reconstruct phase distortion distribution, and compensating for an object light complex amplitude in a space domain; and carrying out phase filtering and unwrapping on the compensated wrapped phase map, and carrying out background segmentation-based Zernike polynomial fitting on the unwrapped phase to compensate for residual distortion.
The present disclosure discloses methods for preparing a composite film based on reduced graphene oxide, cellulose nanocrystals, and cellulose nanofibers. The method mainly includes: 1. preparing a suspension mixed with graphite oxide and cellulose; 2. centrifuging the suspension obtained in the step (1) and washing the sediment after centrifuging with deionized water to obtain a solution, homogenizing the solution in a high-pressure homogenizer to obtain a suspension mixed with graphene oxide, cellulose nanocrystals, and cellulose nanofibers; and 3. drying the suspension mixed with graphene oxide, cellulose nanocrystals, and cellulose nanofibers in a petri dish, and soaking a dried film in a hydroiodic acid solution; and washing the soaked film with deionized water to obtain the composite film of reduced graphene oxide, cellulose nanocrystals, and cellulose nanofibers. The composite film obtained has a higher specific capacitance and a better cycle stability than pure reduced graphene oxide obtained under a same preparation condition.
A method for preparing a fiber-based dressing having a directional exudate-guiding function. The method comprises: step I, respectively preparing a spinning solution of a hydrophobic layer, a spinning solution of a transition layer A, a spinning solution of a transition layer B, and a spinning solution of a transition layer C, wherein the spinning solutions have different hydrophobicity; step II, sequentially forming, by means of electrospinning, the transition layer C, the transition layer B, the transition layer A and the hydrophobic layer on a surface of a cotton fabric, so as to obtain a composite membrane; step III, forming, by means of a mold, hemispherical bulges and tapered channels on a surface of the composite membrane; step IV, cutting the composite membrane obtained in step III into an A-type composite membrane having an exudate guiding strip at a side edge, and cutting the composite membrane obtained in step II into a B-type composite membrane, which has no exudate guiding strip and matches the A-type composite membrane in terms of size; and step V, fitting the A-type composite membrane to the B-type composite membrane, and sealing the periphery thereof to obtain a wound dressing. The fiber-based dressing is provided with a plurality of transition layers having gradient wettability, such that a wound exudate can be directionally guided out and collected; moreover, the hemispherical bulges and the tapered channels are constructed on a surface of the dressing, such that the exudate guiding efficiency can be regulated by means of an external force.
A61L 15/18 - Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
20.
PURIFICATION METHOD FOR STRONTIUM ISOTOPE DETECTION OF SILK CULTURAL RELICS
A purification method for strontium isotope detection of silk cultural relics. The invention relates to the technical field of cultural relic detection. The method comprises: (1) the enrichment of strontium isotopes: after the cleaning of silk cultural relics, adding same to a digestion agent for microwave digestion, then drying same by means of evaporation, adding the dried product to a nitric acid solution for centrifugal separation, and extracting a supernatant; and (2) the purification of the strontium isotopes: first mixing 4',4''(5')-di-tert-butyldicyclohexyl-18-crown-6 with a defoaming agent, adsorbing the mixture into a purification resin separation column, and pre-cleaning the purification resin separation column with a nitric acid solution; injecting the supernatant in step (1) into the purification resin separation column by using the nitric acid solution as carrier liquid; and sequentially injecting a 84Sr solution and an eluent into the purification resin separation column to obtain a separated and purified strontium solution. The method can eliminate the interference of other impurity ions, reduce the loss of strontium, and achieve the effective enrichment and purification of strontium in silk.
G01N 27/62 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosolsInvestigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electric discharges, e.g. emission of cathode
21.
Preparation method of composite films based on cellulose nanocrystals, cellulose nanofibers and reduced graphene oxide
The present disclosure discloses methods for preparing a composite film based on reduced graphene oxide, cellulose nanocrystals, and cellulose nanofibers. The method mainly includes: 1. preparing a suspension mixed with graphite oxide and cellulose; 2. centrifuging the suspension obtained in the step (1) and washing the sediment after centrifuging with deionized water to obtain a solution, homogenizing the solution in a high-pressure homogenizer to obtain a suspension mixed with graphene oxide, cellulose nanocrystals, and cellulose nanofibers; and 3. drying the suspension mixed with graphene oxide, cellulose nanocrystals, and cellulose nanofibers in a petri dish, and soaking a dried film in a hydroiodic acid solution; and washing the soaked film with deionized water to obtain the composite film of reduced graphene oxide, cellulose nanocrystals, and cellulose nanofibers. The composite film obtained has a higher specific capacitance and a better cycle stability than pure reduced graphene oxide obtained under a same preparation condition.
Disclosed in the present invention is a preparation method for an RGO/CNC/CNF composite thin film. The method mainly comprises: 1. preparing a graphite oxide/cellulose mixed suspension; 2. centrifugally washing the graphite oxide/cellulose mixed suspension with deionized water, and then homogenizing same in a high-pressure homogenizer to obtain a graphene oxide/cellulose nanocrystal/cellulose nanofiber mixed suspension; and 3. drying the graphene oxide/cellulose nanocrystal/cellulose nanofiber mixed suspension in a culture dish, soaking the dried thin film in a hydroiodic acid solution, and finally washing the soaked thin film with deionized water to obtain a reduced graphene oxide/cellulose nanocrystal/cellulose nanofiber composite thin film. The composite thin film obtained in the present invention has higher specific capacitance and more excellent cycle stability than reduced pure graphene oxide obtained under the same preparation conditions.
A hollow embolic microsphere, a preparation method therefor, and a pharmaceutical composition and use thereof. The hollow embolic microsphere is a microsphere having a unique shape and structure prepared by using a polymer material, and is suitable for transcatheter arterial embolization. The hollow embolic microsphere disclosed by the invention can enter different channels having different sizes, and has a good embolization effect on various target positions. The hollow microsphere is internally porous, and has drug loading abilities. Drug release after drug loading is easy to control, and the treatment effect is good. No emulsifier and surfactant need to be used in the preparation of the hollow microsphere, reaction conditions are mild, and the process is simple. The obtained microsphere is uniform in shape and controllable in size, and the embolization time can be controlled. Various drugs including protein heat-sensitive drugs can be loaded, and the drug encapsulation efficiency can reach more than 70%.
A61L 31/14 - Materials characterised by their function or physical properties
A61L 31/16 - Biologically active materials, e.g. therapeutic substances
A61L 31/18 - Materials at least partially X-ray or laser opaque
A61K 47/69 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit
A61K 47/36 - PolysaccharidesDerivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
A61K 45/00 - Medicinal preparations containing active ingredients not provided for in groups
24.
SOLID BIMETALLIC TITANIUM-BASED POLYESTER CATALYST, PREPARATION METHOD THEREFOR, AND USE THEREOF
A solid bimetallic titanium-based polyester catalyst, a preparation method therefor, and use thereof. The preparation method for the catalyst comprises: (1) adding a titanium compound to an aqueous solution of a carboxylic acid compound and/or a carboxylic acid derivative, heating, then slowly adding an alcohol compound, and carrying out a reaction to obtain an intermediate product, namely a complex formed by coordination of titanium, alcohol hydroxyl, and carboxylic acid hydroxyl; and (2) adding the intermediate product to an anhydrous alcohol compound, adding a metal salt, and carrying out a reaction to obtain a finished product. The solid bimetallic titanium-based polyester catalyst with high activity is prepared by means of strictly regulating and controlling the types and proportions of the organic acids, alcohols, and metal compounds that coordinate with the titanium compound. When applied to polyester synthesis, the catalyst can effectively inhibit side reactions to obtain a high-quality polymerized product.
SHAOXING-KEQIAO INSTISUTE OF ZHEJIANG SCI-TECH UNIVERSITY CO., LTD. (China)
ZHEJIANG SCI-TECH UNIVERSITY (China)
Inventor
Qi, Dongming
Huang, Zhichao
Tian, Qianjun
Wang, Lin
Liu, Chenghai
Abstract
An environmentally-friendly flexible conductive polyurethane (PU) and a preparation method thereof are disclosed. The environmentally-friendly flexible conductive PU is prepared by subjecting a mixture of a component A and a component B in a specified mass ratio to in-situ solvent-free polymerization, where the component A is prepared from a polyol, a T-type chain extender, a diselenide diol, high-conductivity carbon black, a dispersing agent, a catalyst, and a leveling agent, and the component B is prepared from a polyisocyanate, a polyol, a multi-walled carbon nanotube (MWCNT), and a dispersing agent. The PU has a reliable electrically-conductive function, and shows a self-healing function under room temperature or light conditions when damaged, wherein a microphase separation value HBI (0.5 to 3.0) of soft and hard segment molecules can be adjusted to achieve different hand touches and different mechanical properties, and an organic pollutant emission (volatile organic compound (VOC)) is less than 50 mg/kg.
H01B 1/24 - Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon, or silicon
B82Y 30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites
B82Y 40/00 - Manufacture or treatment of nanostructures
26.
ENVIRONMENTALLY-FRIENDLY FLEXIBLE CONDUCTIVE POLYURETHANE AND PREPARATION METHOD THEREFOR
SHAOXING-KEQIAO INSTISUTE OF ZHEJIANG SCI-TECH UNIVERSITY CO., LTD. (China)
ZHEJIANG SCI-TECH UNIVERSITY (China)
Inventor
Qi, Dongming
Huang, Zhichao
Tian, Qianjun
Wang, Lin
Liu, Chenghai
Abstract
Disclosed in the present invention are environmentally-friendly flexible conductive polyurethane and a preparation method therefor. The environmentally-friendly flexible conductive polyurethane is prepared from a component A and a component B by means of a two-component prepolymer in-situ solvent-free blending polymerization method according to a certain mass ratio. The component A is composed of polyol, a T-chain extender, diselenide diol, high conductivity carbon black, a dispersant, a catalyst, a leveling agent, etc. The component B is composed of polyisocyanate, polyol, multi-walled carbon nanotubes, a dispersant, etc. According to the present invention, the polyurethane has a reliable conductive function, the damaged conductive polyurethane material has self-healing performance under the condition of room temperature or illumination, and different hand feelings and different mechanical properties can be regulated and controlled by adjusting the microphase separation value HBI (0.5-3.0) of soft and hard segment molecules. The organic pollutant emission (VOCs) is lower than 50 mg/kg, and the polyurethane is green and environmentally-friendly, and has a good industrial application prospect.
The present invention provides a divide-by-two latch circuit for deterministic fieldbus network data forwarding, and an application thereof. The circuit comprises: a data buffer, two cache units being provided in the data buffer; a divide-by-two enable latch signal generation module for generating a first divide-by-two latch signal and a second divide-by-two latch signal which have opposite levels, and selecting a data cache unit of the data buffer on the basis of the first divide-by-two latch signal, the second divide-by-two latch signal and a reception enable signal; and a shift register comprising two flip-flops, i.e., a first flip-flop and a second flip-flop which are initialized to be in opposite output states, wherein the first flip-flop is connected to the second flip-flop to realize a shift operation, and finally, data stored in the data buffer unit is selected and read on the basis of low-order and read enable signals in the shift register composed of the two flip-flops. The present invention can be applied to a scenario of deterministic fieldbus network data forwarding as an intra-frequency heterogeneous data cross-time domain circuit, thereby achieving the effects of high resource utilization rate and stability.
The present invention provides a frequency-halving latch circuit for deterministic field bus network data forwarding and application thereof. The frequency-halving latch circuit includes a data buffer equipped with two buffer units; a frequency-halving enable latch signal generation module for generating a first frequency-halving latch signal and a second frequency-halving latch signal with opposite levels, and selecting data buffer units of the data buffer based on the first frequency-halving latch signal, the second frequency-halving latch signal and a receiving enable signal; and a shift register including a first trigger and a second trigger which are initialized to opposite output states, the first trigger and the second trigger is connected to realize a shift operation, and data stored in the data buffer units is finally selected and read based on a low order in the shift register composed of the two triggers and a read enable signal. The frequency-halving latch circuit can be applied to a scenario of deterministic field bus network data forwarding as a same-frequency out-of-phase data cross-clock domain circuit, with high resource utilization rate and stability.
The present invention relates to the field of glass fibers, and in particular to a mesoporous glass fiber and a preparation method therefor and graded porous fiber cotton and a preparation method therefor. The diameter of the glass fiber is 0.25 μm-5 μm, and the glass fiber has a mesoporous structure, and has good heat insulation and sound insulation effects. The graded porous fiber cotton comprises a resin adhesive and the mesoporous glass fiber. The glass fiber cotton is good in porosity, contains a mesoporous and microporous graded pore structure, and is low in heat conductivity coefficient and excellent in sound insulation and heat insulation performance, the lowest heat conductivity coefficient of the glass fiber cotton can reach 0.015W/(m·K), a fire resistance grade is A1 grade, and the highest loss of 2000 Hz of sound transmission can reach 2.1 dB.
C03B 37/04 - Manufacture of glass fibres or filaments by using centrifugal force
C03B 37/022 - Manufacture of glass fibres or filaments by drawing or extruding from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres
D04H 3/12 - Non woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
30.
METHOD FOR PREDICTING, REGULATING AND CONTROLLING WEAR CHARACTERISTIC OF FLOW CHANNEL IN VALVE
A method for predicting, regulating and controlling a wear characteristic of a flow channel in a valve. A multi-phase flow and regulating valve is arranged in a circulating pipeline loop. The method comprises: pasting an aluminum sheet in a valve core (13), and testing a wear rate; regulating inlet pressure, and obtaining distribution characteristics of a pressure field and a velocity field; establishing an association relationship between the wear rate and pressure and a flow velocity; increasing the inlet pressure, and drawing a discrete data curve and a continuous curve; obtaining a discrete data change curve and a continuous curve of the wear rate along with an opening degree of the valve core (13); obtaining an association relationship graph between the wear rate of the aluminum sheet and the inlet pressure and the opening degree of the valve core (13); changing a particle size and a particle concentration, and obtaining an association relationship graph between the wear rate of the aluminum sheet and the inlet pressure, the opening degree of the valve core (13), the particle size and the particle concentration; and performing comparison and determination on a real-time wear rate actual value of the aluminum sheet and a critical wear rate value, thereby avoiding the rapid wear and failure of the valve core (13). The method can be applied to flow wear state monitoring and dynamic regulation and control of a multi-stage depressurization string type liquid level regulating valve, and self-elimination of a flow wear critical characteristic of a high-pressure-difference liquid level regulating valve in a complicated service environment is realized.
Disclosed in the present invention is a method for identifying and eliminating ammonium salt deposition characteristics in a pipe of a hydrogenation air cooler. A multiphase flow medium enters an inlet pipe box of a hydrogenation air cooler; an initial service state is calibrated, and an initial temperature calibration line and an equivalent temperature reference line are drawn to set a benchmark; cross sections and temperature transmitters are arranged on a pipe bundle of the air cooler at equal intervals in the axial direction; a temperature signal value is monitored and transmitted to a single-chip microcomputer for data analysis; an infrared thermal imager performs photographing, and transmits data such that same is processed to determine that an ammonium salt deposition risk is present under this working condition; a monitored temperature value is calculated, an ammonium salt deposition risk identification model is established, and an ammonium salt deposition risk on a temperature information monitoring section is then determined; and ammonium salt deposits are peeled off from the inner wall of the pipe bundle of the air cooler by means of vibration of the pipe bundle caused by the intermittent frequent switching-on/switching-off of an electromagnet and a magnetic block, and ultrasonic signals. In the present invention, the surface temperature field of a hydrogenation air cooler is monitored in real time, such that early identification, state monitoring and precise intelligent elimination of ammonium salt deposition characteristics in a pipe are realized.
The present invention relates to the technical field of modified carbon fibers, and in particular to a carbon fiber modification method and a product thereof. Carbon fibers are subjected to magnetron sputtering treatment and then subjected to heating treatment in an inert atmosphere, and modified carbon fibers are obtained, wherein the magnetron sputtering treatment takes the carbon fibers as a base material and carbon as a target material, and the sputtering conditions are: the vacuum degree is 2×10-3 Pa, the target-base distance is 4 cm, the magnetron sputtering power is 150-350 W, the magnetron sputtering pressure is 0.5-1.6 Pa, the magnetron sputtering time is 20-60 min, high-purity argon is taken as working gas, and an argon flow is 80 ml/min; and the heating treatment conditions are: the heating rate is 5°C/min, the heat treatment temperature is 200-600°C, and the heat treatment time is 25-40 min. For the carbon fibers which are modified according to the present invention, the tensile breaking strength can be increased by 4%-12%, the tensile breaking work can be increased by 15%-40%, and the mechanical performance of the carbon fibers can be effectively improved.
C23C 14/35 - Sputtering by application of a magnetic field, e.g. magnetron sputtering
C23C 14/06 - Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
D06M 11/74 - 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 carbon or compounds thereof with carbon or graphiteTreating 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 carbon or compounds thereof with carbidesTreating 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 carbon or compounds thereof with graphitic acids or their salts
A graphene/polymer microsphere a modified chemical fiber filled with a multi-oriented graphene/polymer composite and a preparation method are disclosed. Graphene is coated by an in-situ suspension polymerization, which greatly improves the dispersion effect of graphene. Comonomers are used to increase the compatibility between graphene and polymers, so that a strong interaction between graphene and polymers is formed. The graphene/polymer microsphere with low melting point and high toughness is used to fill a chemical fiber, and is oriented therein to modify the chemical fiber. The graphene/polymer microspheres could be oriented to form a microfibril structure with a high aspect ratio in the chemical fiber.
D01F 6/52 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated carboxylic acids or unsaturated esters
A valve opening and closing structure and a valve. The valve opening and closing structure comprises: a rotating chuck (8), a plurality of valve flaps (5), and a limiting chuck (1). Both sides of each valve flap (5) are respectively provided with a sliding member (6) and a guide member (4); the rotating chuck (8) is provided with sliding grooves (7) in one-to-one correspondence to the sliding members (6); the sliding members (6) can slide along the sliding grooves (7); the limiting chuck (1) is provided with guide rails (2) in one-to-one correspondence to the guide members (4); the guide members (4) can slide and rotate along the guide rails (2); and the plurality of valve flaps (5) are enclosed to form a circle. The valve opening and closing structure is configured to drive, by means of the rotation of the rotating chuck (8), the plurality of valve flaps (5) to move along respective sliding grooves (7) and guide rails (2). The valve comprises a housing and the valve opening and closing structure; the rotating chuck (8) is movably supported in the housing; and the limiting chuck (1) is fixed to the housing.
F16K 3/03 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor with a closure member in the form of an iris-diaphragm
F16K 3/314 - Forms or constructions of slidesAttachment of the slide to the spindle
F16K 27/04 - Construction of housingsUse of materials therefor of sliding valves
F16K 31/53 - Mechanical actuating means with toothed gearing
35.
Variable synthetic wavelength absolute distance measuring device locked to dynamic sideband and method thereof
A variable synthetic wavelength absolute distance measuring device locked to a dynamic sideband and a method thereof are disclosed. A high-frequency electro-optic phase modulator driven by an adjustable clock source to modulate a single-frequency reference laser to generate laser sidebands with equal frequency intervals. The tunable laser is locked to the fifth-order sideband through an offset frequency locking technology. After locking, the interval frequency of the sideband is determined by the adjustable clock source, namely dynamic sideband. The frequency of the adjustable clock source is dynamically adjusted, the interval frequency of the sideband and the frequency difference between the two lasers will change accordingly. Combined with the multi-wavelength interferometry, the constructed synthetic wavelength is also determined by the adjustable clock source, that is, the variable synthetic wavelength. The variable synthetic wavelength is dynamically adjusted, and the multi-level second-level synthetic wavelength is continuously constructed from large level to small level.
G01C 3/02 - Measuring distances in line of sightOptical rangefinders Details
G01B 9/02001 - Interferometers characterised by controlling or generating intrinsic radiation properties
G01B 9/02004 - Interferometers characterised by controlling or generating intrinsic radiation properties using two or more frequencies using frequency scans
G01B 11/02 - Measuring arrangements characterised by the use of optical techniques for measuring length, width, or thickness
G02B 27/12 - Beam splitting or combining systems operating by refraction only
G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
G02F 1/21 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference
H01S 5/0687 - Stabilising the frequency of the laser
36.
Method for preparing PET/PTT parallel complex filament with high self-crimpiness
The present invention discloses a method for preparing a PET/PTT parallel complex filament with high self-crimpiness, wherein PET and PTT are sliced, dried and crystallized, and then fused separately and subjected to extrusion molding through a parallel-type spinneret plate; oil is applied after cooling; then level 1-3 drafting and heat setting treatment are adopted; and during drafting, a total drafting rate is controlled to be 3 to 3.5, wherein the level-1 drafting rate is 2.8 to 3.0 at a temperature controlled to be 75 to 80° C., according to the method for preparing the PET/PTT parallel complex filament with high self-crimpiness, methods like multi-level drafting for increasing the drafting rate are adopted, and the effects of improving the fiber strength, moderately lowering the breaking elongation, and greatly improving the self-crimpiness are achieved.
D01D 5/22 - Formation of filaments, threads, or the like with a crimped or curled structureFormation of filaments, threads, or the like with a special structure to simulate wool
D01F 8/14 - Conjugated, i.e. bi- or multicomponent, man-made filaments or the likeManufacture thereof from synthetic polymers with at least one polyester as constituent
D02G 1/00 - Producing crimped or curled fibres, filaments, yarns or threads, giving them latent characteristics
D02J 1/22 - Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
D02J 13/00 - Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
1−3)+2], and a grade number of shaded color is less than or equal to the maximum number of the shaded weaves. The designed fabric meets the covering requirements and can be mass produced.
D03D 13/00 - Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
D03D 15/54 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads coloured
D03C 19/00 - Methods or devices concerned with designing or making patterns, not provided for in other groups of this subclass
38.
CONSTRAINED REDUNDANT PARALLEL MECHANISM WITH FOUR DEGREES OF FREEDOM INCLUDING TWO ROTATIONAL AND TWO TRANSLATIONAL DEGREES OF FREEDOM
A constrained redundant parallel mechanism with four degrees of freedom including two rotational and two translational degrees of freedom, the parallel mechanism comprising a machine frame, a movable platform (1), and two first branches and two second branches which are connected in parallel between the machine frame and the movable platform, wherein each first branch comprises a first translational pair, a first spherical hinge (13), a first connecting rod (14) and a second spherical hinge (15), which are sequentially connected between the machine frame and the movable platform; each second branch comprises a second translational pair, a first rotational pair (23), a second connecting rod (24) and a first hooke joint (25), which are sequentially connected between the machine frame and the movable platform; and a first rotating shaft of the first hooke joint in the second branch is connected to the movable platform, and the axis of a second rotating shaft of the first hooke joint connected to the second connection rod is parallel to the axis of the first rotational pair and perpendicular to the translational axis of the second translational pair. The parallel mechanism has the advantages of a high precision/rigidity, a high operation speed, a good dynamic performance, and a high carrying capacity.
Method for synthesizing polymer/pigment hybrid latex through sulfur-free and soap-free in-situ reversible addition-fragmentation chain transfer (RAFT) emulsion copolymerization
A method for synthesizing a polymer/pigment hybrid latex through sulfur-free and soap-free in-situ reversible addition-fragmentation chain transfer (RAFT) emulsion copolymerization includes the following: dispersing a pigment with a reactive emulsifier to prepare a pigment dispersion; synthesizing an amphiphilic sulfur-free ω-vinyl-terminated polymethyl methacrylate (PMMA) macromolecular RAFT agent in-situ on a surface of pigment particles through catalytic chain transfer polymerization (CCTP); and adding an acrylate monomer dropwise, allowing in-situ sulfur-free RAFT polymerization on a surface of pigment particles through the RAFT agent, and adjusting a structure and a composition of an encapsulated polymer layer to obtain a series of uniformly encapsulated and stably dispersed polymer/organic pigment hybrid latexes. The new hybrid latex prepared through sulfur-free and soap-free in-situ RAFT emulsion copolymerization has the characteristics of high dispersion stability, high pigment encapsulation efficiency, clear encapsulated polymer layer sequence, controllable structure, etc., which is suitable for surface encapsulation modification of various pigments.
C08F 293/00 - Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
B01J 13/18 - In situ polymerisation with all reactants being present in the same phase
C08F 2/44 - Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
C09B 67/02 - Dyestuff preparations characterised by special physical forms, e.g. tablets, films
The present invention relates to a method for sulphur-free soap-free in-situ RAFT emulsion copolymerisation of polymer/pigment hybrid latex, comprising the following steps: selecting a reactive emulsifier to disperse a pigment to prepare a pigment dispersion; using a catalytic chain transfer polymerisation method to synthesise an amphiphilic sulphur-free terminal ω-vinyl methacrylate macromolecular RAFT reagent in situ on the surface of the pigment particles; dropwise adding an acrylate monomer, performing in-situ sulphur-free RAFT polymerisation on the surface of the pigment particles by means of the RAFT reagent, and adjusting the structure and the composition of the coating layer polymer to acquire a series of uniformly coated and stably dispersed polymer/organic pigment hybrid latexes. The hybrid latex prepared by means of the sulphur-free soap-free in-situ RAFT emulsion copolymerisation of the present invention has high dispersion stability, high pigment coating rate, clear coating polymer layer sequence, and a controllable structure, and is suitable for surface coating modification of various pigments.
C08F 2/38 - Polymerisation using regulators, e.g. chain terminating agents
C08F 293/00 - Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
41.
GRAPHENE/POLYMER MULTI-ORIENTATION FILLING MODIFIED CHEMICAL FIBER AND PREPARATION METHOD THEREFOR
The present invention relates to the technical field of fiber modification, and provides a graphene/polymer multi-orientation filling modified chemical fiber and a preparation method therefor. In the present invention, graphene is coated by means of in-situ suspension polymerization, thereby greatly improving the dispersion effect of the graphene; the compatibility between the graphene and polymer microspheres is improved by utilizing a comonomer, thereby forming relatively strong interaction between the graphene and the polymer microspheres; the present invention employs a low-melting-point and high-toughness graphene/polymer microsphere oriented filling modified chemical fiber, strength and toughness of the chemical fiber can be increased simultaneously, and electrical and thermal conduction properties of a chemical fiber product are expected to be improved; oriented graphene/polymer microspheres can form a microfiber structure having a high length-to-diameter ratio in a single fiber, and the structure can inhibit formation of cracks in the radial direction (the main fracture direction of the fiber) on one hand, and can induce high orientation and crystallization of polymer molecules in a chemical fiber matrix on the other hand, so that the strength of a fiber material is increased.
D01F 6/52 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated carboxylic acids or unsaturated esters
The present disclosure discloses an electromagnetic regulating valve with a check function. The valve may effectively regulate the flow in a valve body. Due to different lengths and taper angles of a valve flap group, the flow can be regulated more finely, and a medium can be prevented from backflow by a check function when necessary. Meanwhile, a mesh structure of bases of valve flaps can effectively reduce the instability of flow field motion so as to achieve an effect of rectifying.
A water injection method for a PID control-based adaptive intelligent water injection system is provided. The system includes a water injection portion, a power portion, a control portion, and a measurement and transmission portion. The water injection portion includes a hydrogenation reactor, heat exchangers, air coolers, and a separation tank. The power portion includes a motor and a water pump. The control portion includes a console and a bus. Temperature, pressure and flow velocity transmitters are additionally arranged at each of inlet and outlet pipes of various heat exchangers, and water injection points are disposed. Temperature, pressure and flow velocity signals of the inlet and outlet pipes of heat exchange devices are monitored, and the console performs error analysis on the three signals and uses a PID control algorithm to control the adjustment valve to alter the valve opening degree to adjust the water injection amount in real time.
B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus
G06F 17/18 - Complex mathematical operations for evaluating statistical data
B01J 8/04 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
44.
DEVICE AND METHOD FOR MEASURING ABSOLUTE DISTANCE BY VARIABLE SYNTHETIC WAVELENGTH LOCKED TO DYNAMIC SIDEBAND
A device and method for measuring an absolute distance by a variable synthetic wavelength locked to a dynamic sideband. The measurement device comprises: a reference laser (1), a first optical fiber beam splitter (2), a high-frequency electro-optical phase modulator (3), an orthogonal optical fiber combiner (4), a high-frequency amplifier (10), an adjustable clock source (11), an atomic clock (12), an offset frequency detection and locking controller (13), a tunable laser (14), a second optical fiber splitter (15), an optical fiber combiner (16), and a sinusoidal phase-modulating interferometer. Said method comprises: using a high-frequency electro-optical phase modulator (3) driven by an adjustable clock source (11) to modulate a single-frequency reference laser, so as to generate a laser sideband having equal frequency intervals; locking a tunable laser (14) to a fifth-stage sideband by means of offset frequency locking technology, after locking, the spacing frequency of the sideband being determined by an adjustable clock source (11), i.e. a dynamic sideband; dynamically adjusting the frequency of the adjustable clock source (11), the spacing frequency of the sideband and the difference between frequencies of two lasers changing therewith, according to a multi-wavelength interference method, the constructed synthetic wavelength also being determined by the adjustable clock source (11), i.e. a variable synthetic wavelength; dynamically adjusting the variable synthetic wavelength, and continuously constructing multiple stages of second-order synthetic wavelengths in a descending order; and obtaining a distance to be measured according to a synthetic wavelength transition theory.
The disclosure discloses a differential sinusoidal phase modulation laser interferometric nanometer displacement measuring apparatus and method. The beam output from the single-frequency laser is converted into a 45° linearly polarized beam after passing through the polarizer, then projected onto two sets of sinusoidal phase modulation interferometers consisting of the beam splitter, the electro-optic phase modulator, the half wave plate, three pyramid prisms, two polarization beam splitters, thereby forming measurement and reference interference signals which are received by two photodetectors. A high-frequency sinusoidal voltage signal is applied to the electro-optic phase modulator placed in the common reference arm of the two interferometers, thereby modulating the interference signal into a high-frequency AC signal. By detecting the difference between the phase change amounts of the two interference signals when the measured object moves, the measured displacement can be obtained.
G01B 11/14 - Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
46.
BLADE LOAD DISTRIBUTION-BASED METHOD FOR DESIGNING CENTRIFUGAL-PUMP COMPOUND IMPELLER
Provided is a blade load distribution-based method for designing a centrifugal-pump compound impeller: calculating an initial impeller to obtain the Euler head gradient coefficient, and determining whether long blades should be replaced by short blades for the impeller; while ensuring that the total load of the long and short blades is consistent, performing rear loading design for the long blades and performing front loading design for the short blades, such that the composite impeller can significantly improve the flow conditions inside the impeller. The invention improves the jet-wake phenomenon at the exit of the impeller, enhances the anti-cavitation performance of the centrifugal pump, and reduces the impact of pressure pulsation on the pump, making the flow more stable.
A sample preparation mould and a sample preparation method for the triaxial test of MSW are provided. In the present invention, the cylindrical main mould comprises two curved steel pieces, and the two sides of each curved steel piece have a stretched connection part; the two curved steel pieces are connected with each other and clamped by two steel clamps; porous stones are arranged at two ends of the cylindrical main mould and fixed separately by a top limiting lantern ring and a bottom lantern ring; the top limiting lantern ring is detachably connected to the top hopper, from which MSW materials are input; the cylindrical main mould is radially constrained in four positions, and the two ends thereof are axially constrained, thereby significantly improving stability during compacting and hence ensuring the axial and radial sizes of the MSW sample.
A preparation method for a highly self-crimpable PET/PTT side-by-side composite filament: after slicing, drying and crystallizing PET and PTT, melting each and forming by means of extruding out of side-by-side spinneret plates, cooling then applying oil, carrying out 1-3 stages of drafting and heat setting treatment, the total drafting ratio when drafting being controlled to be 3-3.5, a first stage drafting ratio being 2.8-3.0, and temperature being controlled to be 75-80°C. The present highly self-crimpable PET/PTT side-by-side composite filament preparation method uses methods such as multiple stages of drafting to improve a drafting ratio, achieving the results of increased fiber strength, moderately decreased elongation at break, and greatly improved self-crimping functionality.
D01D 5/22 - Formation of filaments, threads, or the like with a crimped or curled structureFormation of filaments, threads, or the like with a special structure to simulate wool
A differential laser interferometric nanometer displacement measurement apparatus and method employing sinusoidal phase modulation. The method comprises: converting, by means of a polarizer (2), a light beam outputted by a single-frequency laser (1) into 45° linearly polarized light, directing the 45° linearly polarized light to two sinusoidal phase modulation interferometers respectively consisting of a beam splitter (3), an electro-optic phase modulator (5), a half-wave plate (4), three pyramidal prisms (6, 8, 9), and two polarizing beam splitters (7, 10) so as to form a measurement interference signal and a reference interference signal, and using two photoelectric detectors (11, 12) to receive the two signals; applying a high-frequency sinusoidal voltage signal to the electro-optic phase modulator (5) on a common reference arm of the two interferometers so as to modulate the interference signal into a high-frequency alternating-current signal; and measuring a difference between phase changes of the two interference signals existing when an object under measurement is moving, so as to acquire a measured displacement. Sinusoidal phase modulation improves the anti-interference performance of the interference signal, and a differential optical path is used to eliminate temperature drifts and environmental disturbance errors of the reference arm and part of measurement arms. The invention achieves sub-nanometer measurement accuracy, and is applicable to precision displacement measurement in the fields of high-end equipment manufacturing and precision test and measurement.
A reference laser beam locked to a femtosecond optical frequency comb is modulated through a high frequency electro-optic phase modulator, and laser sidebands with equal intervals are generated. Beat frequency is performed on the sixth-order sideband and the frequency sweeping laser beam, a beat signal and a frequency sweeping signal source are down-mixed to generate a difference frequency signal, and the difference frequency signal is locked to a reference clock through a digital phase detector and a PID controller. The frequency sweeping laser beam is locked to reference laser beam with a dynamic offset frequency under the closed loop control, and sinusoidal frequency sweeping is simultaneously performed together with the frequency sweeping signal source. The locked laser beam is used for absolute distance measurement, and a distance to be measured is obtained according to the synthetic wavelength transition theory.
Disclosed are an absolute distance measurement apparatus and method using dynamic frequency offset locking and sinusoidal frequency scanning interferometry. The method comprises: a high-frequency electro-optic phase modulator modulating reference laser light locked to a femtosecond optical frequency comb and generating laser light sidebands at equal intervals; a sixth-order sideband and swept-frequency laser light performing frequency beating, a beat frequency signal and a signal output by a swept-frequency signal source undergoing down-mixing to generate a difference frequency signal, and locking the difference frequency signal to a reference clock by a digital phase discriminator and a PID controller; the swept-frequency laser light undergoing dynamic frequency offset locking to reference laser light under closed-loop control, and performing sinusoidal frequency scanning synchronously with the swept-frequency signal source; and the locked laser being used for absolute distance measurement to obtain an interference signal, solving a phase according to the characteristic of sinusoidal frequency scanning, and solving a distance to be measured according to a synthetic wavelength transition theory. By means of the present invention, the problems of it being difficult to accurately control the laser light frequency in a frequency scanning method, it being difficult to accurately measure the frequency scanning amount, etc., are solved, the absolute distance measurement accuracy and efficiency are improved, and the present invention can be widely applied to the technical field of interference measurement.
Disclosed are a PID control-based adaptive smart water injection system and a water injection method. The system comprises a water injection portion, a power portion, a control portion, and a measurement and transmission portion. Temperature transmitters, pressure transmitters and flow transmitters are additionally arranged at inlet and outlet pipelines of various heat exchangers, and water injection points are set. Heat exchange device inlet/outlet pipeline temperature, pressure and flow signals are monitored, a control platform performs error analysis on the three signals, a PID control algorithm is used to control various adjustment valves to alter the valve opening degrees, and the water injection amount is adjusted in real time, thereby solving the defect of lag in traditional intermittent water injection, and achieving the goal of alleviating the problem of ammonium salt corrosion failure in petrochemical hydrogenation apparatuses, in addition to conforming with the concepts of energy conservation and environmental protection. The present invention is suitable for hydrogenation apparatuses in fields such as petrochemical engineering, has simple processes and strong applicability, and can be applied to hydrogenation processes having different numbers of heat exchange devices.
F28F 19/00 - Preventing the formation of deposits or corrosion, e.g. by using filters
G05B 11/42 - Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
53.
Phase delay extraction and compensation method in PGC phase demodulation technology
The disclosure discloses a phase delay extraction and compensation method in a PGC phase demodulation technology. The sinusoidal phase modulation interference signal is converted into a digital interference signal by an analog-to-digital converter after amplification and filtering, and the digital interference signal is subjected to orthogonal downmixing of first-order, second-order, and fourth-order harmonics simultaneously to obtain three pairs of orthogonal harmonic amplitude signals. The three pairs of orthogonal harmonic amplitude signals are used to extract phase delay, and the result is used to calculate the corresponding phase delay correction coefficients, and the phase delay correction coefficient are multiplied by the corresponding absolute harmonic amplitude signal equal to the sum of the absolute value of the orthogonal harmonic amplitude signals to obtain a new harmonic amplitude signal that is not affected by the phase delay, then the phase to be measured is obtained through the arc tangent operation.
Disclosed in the present invention is a phase delay extraction and compensation method in a PGC phase demodulation method, comprising: converting, by means of an analog-to-digital converter, an amplified and filtered sinusoidal phase modulation interference signal into a digital interference signal, simultaneously performing quadrature downmixing of first-order, second-order and fourth-order harmonics on the digital interference signal, so as to obtain three pairs of quadrature harmonic amplitude signals, using the three pairs of quadrature harmonic amplitude signals to extract a phase delay amount, using the phase delay amount to calculate a corresponding phase delay correction coefficient, multiplying the phase delay correction coefficient by a corresponding absolute harmonic amplitude signal equal to the sum of the absolute values of the quadrature harmonic amplitude signals, obtaining a new harmonic amplitude signal which is not affected by the phase delay, and then obtaining, by means of an arc tangent operation, a phase to be measured. The present invention solves the problems in the PGC phase demodulation technology of the difficulty in accurately measuring the phase delay and the difficulty in performing real-time compensation on the non-linear error caused by the phase delay, improving the phase measurement accuracy; and is widely used in the technical field of sinusoidal modulation interference.
G01D 5/26 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light
The present invention discloses a layered electro-magnetic refreshable braille display device and braille reader. The layered electro-magnetic refreshable braille display device includes three layers of braille display modules and a touch panel. Each braille display module includes 5 plates and a plurality of tactile pin driving mechanisms for driving the “up” and “down” of the braille dots. One or more lines of braille cells are arranged on the touch panel. Each line of braille cells displays a plurality of braille characters. A microprocessor is connected to a braille translation module, a voice playing module and an interaction controller respectively, wherein the interaction controller is connected to the braille display device, to form the braille reader. This device can display one or more lines of braille characters by relying on the electro-magnetic principle. It boasts real-time refreshing of the braille, synchronization of braille display and voice playing.
G09B 21/00 - Teaching, or communicating with, the blind, deaf or mute
G06F 3/041 - Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
G09F 9/37 - Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
56.
ELECTROMAGNETICALLY-DRIVEN BRAILLE DISPLAY DEVICE WITH LOW ENERGY CONSUMPTION
Disclosed is an electromagnetically-driven Braille display device with low energy consumption, comprising a base, a main body, actuation rods, ejector pins and actuators, wherein the main body is mounted on the base, the main body is at least provided with ejector pin mounting holes with the same number as that of Braille contacts in a "cell", the actuation rods with the same number as that of each column of ejector pins are arranged below the column of ejector pins, and the bottom of each ejector pin is always in contact with the actuation rod; and the main body is further provided with actuation rod mounting holes, each actuation rod mounting hole is respectively in communication with the corresponding ejector pin mounting hole, each actuation rod is driven by an actuator, and each actuation rod uniquely controls the lifting movement of an ejector pin corresponding to the actuation rod. The present invention provides an electromagnetic-driven Braille display device with low energy consumption, wherein same is suitable for the generation of Braille characters in all languages and in all forms.
The present invention discloses a real-time normalization apparatus and method of the PGC demodulation in a sinusoidal phase modulation interferometer. An optical setup containing a measuring interferometer and a monitoring interferometer is constructed. An electro-optic phase modulator is placed in the common reference arm of the two interferometers. High-frequency sinusoidal wave modulation and low-frequency triangular wave modulation are applied to the electro-optic phase modulator at the same time. Sinusoidal modulation is used for generating phase carrier, and PGC demodulation is performed to obtain quadrature signals containing the phase information to be measured. Triangular wave modulation makes the quadrature signals change periodically. Ellipse fitting is performed on the Lissajous figure corresponding to the quadrature signals, and real-time normalization of the PGC demodulated quadrature signals is achieved. By calculating the variation of the phase difference between the two interference signals, the measured displacement is obtained, and nanometer scale displacement measurement is achieved.
G01D 5/353 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
H04L 27/233 - Demodulator circuitsReceiver circuits using non-coherent demodulation
58.
REAL-TIME NORMALIZATION MODIFICATION APPARATUS AND METHOD FOR PGC DEMODULATION IN SINE PHASE MODULATION INTERFEROMETER
A real-time normalization modification apparatus for PGC demodulation in a sine phase modulation interferometer, containing an optical path structure for measuring an interferometer and monitoring the interferometer; an electro-optic phase modulator is placed in a common reference arm of the two interferometers, and high-frequency sinusoidal wave modulation and low-frequency triangular wave modulation are applied at the same time; the sinusoidal wave modulation is used for generating a phase carrier, and PGC demodulation is performed to obtain an orthogonal signal containing information about a phase to be measured; the triangular wave modulation enables the orthogonal signal to periodically change, and ellipse fitting is performed on a Lissajous figure corresponding to the orthogonal signal, so as to realize the real-time normalized modification of the PGC demodulated orthogonal signal; and a measured displacement is obtained by calculating a phase difference variation of two interference signals, realizing nanoscale displacement measurement. Also provided is displacement detection method based on real-time normalization processing of PGC demodulation in a sine phase modulation interferometer. Non-linear errors caused by changes in a phase modulation depth, a phase delay, a multiplier, a filter gain, etc. in PGC demodulation are eliminated, and there is a sub-nanoscale measurement precision, which is applicable for precise displacement measurement in the field of high-end equipment manufacturing and machining.
Disclosed are a continuous weft inserting and border lockstitching device based on a three-dimensional annular knitting machine and a weft insertion method therefor. In the weft insertion method, a stepping motor (1) is connected to a left border lockstitching air cylinder (2) and drives the rotation thereof; the left border lockstitching air cylinder (2) is mounted on a left border lockstitching air cylinder fixing member (14); a left border lockstitching laser distance measurement device (10) monitors the stroke of a piston rod of the left border lockstitching air cylinder (2); a right border lockstitching air cylinder (5) is mounted on a right border lockstitching air cylinder fixing member (15); a right border lockstitching laser distance measurement device (11) monitors the stroke of a piston rod of the right border lockstitching air cylinder (5); a weft insertion rapier air cylinder (3) and a rapier (4) are respectively mounted on a rapier and an air cylinder fixing member (17); a rapier laser distance measurement device (9) monitors the stroke of the rapier (4); a beating-up heald frame (18) is fixed on a rack (19); a right border pressing air cylinder (6) is mounted on a right border pressing fixing member (16) and is connected to a U-shaped presser (7); the U-shaped presser (7) presses against a cloth fell (8); the cloth fell (8) is located on the rack (19); and a left border pressing laser distance measurement device (12) monitors the stroke of the cloth fell (8). A weft locking device fixes an outer weft of a warp layer, thus preventing a weft motion caused by the reciprocating motion of the rapier and increasing the success rate of weft insertion.
D03D 47/12 - Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
60.
Two rotational and one translational degrees of freedom parallel manipulator with high rotational capability
Disclosed is a two-turn-one-movement parallel mechanism with a large turning angle, comprising a machine frame, a movable platform, a first branch and two second branches, characterized in that the first branch comprises a machine frame turning pair, a first moving pair slider, a first moving pair guide rod and a first universal joint; each one of the second branches comprises a second moving pair guide rail, a second moving pair slider, a second universal joint, a connecting rod and a movable platform turning pair; in the two second branches, the axis of the first turning pair of each one of the second universal joints is superimposed with and parallel to the axis of the machine frame turning pair in the first branch, and the axis of each one of the movable platform turning pairs is parallel to the second turning axis of the first universal joint in the first branch.
F16H 21/54 - Gearings comprising primarily only links or levers, with or without slides with movements in three dimensions for conveying or interconverting oscillating or reciprocating motions
The present invention discloses a dual-homodyne laser interferometric nanometer displacement measuring apparatus and method based on phase modulation. The linearly polarized beam with single wavelength emitted from a single frequency laser is projected onto a dual-homodyne laser interferometer consisting of four beam splitters and two retroreflectors to respectively form a measurement interference signal and a reference interference signal received by two photodetectors, respectively; an electro-optic phase modulator is placed in the optical path and a periodic sawtooth-wave voltage signal is applied to modulate the measurement and reference DC interference signals into AC interference signals; the measured displacement is obtained by detecting the variation of the phase difference between the two interference signals caused by the movement of the measured object. The present invention overcomes the error arising from DC drift in the homodyne laser interferometer and avoids the sinusoidal error caused by the direct subdivision of the interference signal or non-quadrature error of measurement interference signal. The present invention is applicable for the precision displacement measurement with sub-nanometer level accuracy in the fields of high-end equipment manufacturing and processing.
A large-rotation angle two-rotational and one-translational parallel mechanism, comprising a chassis, a mobile platform (1), one first branch and two second branches; the first branch comprises a chassis rotating pair, a first translational pair sliding block (13), a first translational pair guide rod (14) and a first Hooke's joint (15); a second branch comprises a second translational pair guide rail (21), a second translational pair sliding block (22) a second Hooke's joint (23), a connecting rod (24) and a mobile platform rotational pair (25); in the two second branches, first rotational pair axes of the second Hooke's joints coincide, and are also parallel to an axis of the chassis rotational pair of the first branch; in the two second branches, axes of the movable platform rotational pairs are parallel to a second rotational axis of the first Hooke's joint (15) of the first branch. The present parallel mechanism has the advantages of a large degree of rotation, simple structure, high stiffness, large carrying capacity, and good kinetic performance.
A method of air refractive index correction for an absolute long distance measurement adopting a two-color method based on a single wavelength and a synthetic wavelength is provided. Two lasers emit two laser beams with a constant single wavelength and a variable wavelength, respectively, to form a synthetic wavelength chain from large to small through a laser interferometric system. Each order of the synthetic wavelength chain is used to obtain a series of the estimate values of optical distance with gradually increasing accuracy. After optical distances corresponding to a minimum synthetic wavelength and a single wavelength are obtained simultaneously, the corrected absolute distance is achieved according to the principle of the two-color method for air refractive index correction. The method can realize full-path correction of air refractive index along the actual path of the distance measurement, and has low requirements on the measurement precision of environmental parameters such as temperature and pressure.
A phase modulation-based dual-laser single-frequency interferometric nanometer displacement measurement device, comprising: a single frequency laser (1), first to fourth beam splitters (2, 3, 4, 5), an electro-optic phase modulator (6), a high voltage amplifier (7), a signal generator (8), a reference corner cube prism (9), a measurement corner cube prism (10), and first and second photodetectors (11, 12). The single frequency laser (1) outputs single-wavelength linearly polarized light to a reference laser single-frequency interferometer composed of the first to fourth beam splitters (2, 3, 4, 5) and the reference corner cube prism (9) and a measurement laser single-frequency interferometer composed of the second beam splitter (3), the reference corner cube prism (9), and the measurement corner cube prism (10), to respectively form a reference interference signal and a measurement interference signal that are received by the first and second photodetectors (11, 12). The electro-optic phase modulator (6) is disposed between the second beam splitter (3) and the reference corner cube prism (9) and is used to modulate a DC interference signal into an AC interference signal. A displacement of a measured object is obtained according to a variation of a phase difference of the two interference signals. A displacement measurement method using the displacement measurement device is further provided. The device and method prevent a DC drift error generated by a single frequency interferometer and a sinusoidal error or non-orthogonal error caused by directly subdividing a measurement interference signal.
A method for correcting an air refractive index in large-range absolute distance (D) measurement. Self-correction of the air refractive index in the absolute distance (D) measurement is implemented by using a two-color method based on a single wavelength (λ1) of a laser and a synthetic wavelength. Two laser devices (1, 2) respectively output a laser beam having a fixed wavelength and a laser beam having an adjustable wavelength; a chain of synthetic wavelengths (λS1, …, λSi, …, λSn) from large to small is constructed by a laser interference system (II); each stage of synthetic wavelength meets an inter-stage transition condition, and a minimum synthetic wavelength (λSn) can transition to a single wavelength (λ1); to-be-measured absolute distances (D) are respectively measured to obtain optical distance estimated values (LS1, …, LSi, …, LSn) of which the precision is gradually improved; optical distances (LSn, L1) corresponding to the minimum synthetic wavelength (λSn) and the single wavelength (λ1) are simultaneously obtained; a corrected absolute distance (D) is obtained according to a two-color method air refractive index correction principle. The present method is applicable to large-range distance measurement and high-precision distance correction, relates to full-path correction of an air refractive index along an actual measurement optical path, and is easily implemented due to low measurement precision requirements for environmental parameters, such as temperature and pressure.
The present invention relates to the technical field of polymer composites, in particular to a poly (cyclic butylene terephthalate)/silicon dioxide nanocomposite, wherein the added silicon dioxide is catalyst-modified nanosilicon dioxide.
2. The orthogonally linearly polarized beam projects onto the wavelength-leverage laser interferometric system to form the interference beam. The interference beam projects onto the interference signal processing and controlling system. In the wavelength-leverage laser interferometric system, the synthetic wavelength and the single wavelength as well as the measured absolute distance and the moving displacement of the cube-corner prism in the reference arm form a wavelength-leverage absolute distance measurement relationship.
G01B 11/14 - Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
A laser heterodyne interferometric straightness measurement apparatus and method with six DOFs determination includes a part for determining the straightness and its position based on laser heterodyne interferometry and a part for error determination and compensation. The optical path for determination of four DOFs errors including three common beam-splitters, a polarizing beam-splitter, a planar mirror, a convex lens, a position-sensitive detector and two quadrant detectors is added in the optical configuration of the part for determining the straightness and its position based on laser heterodyne interferometry.
A laser interference wavelength lever-type absolute distance measurement apparatus, comprising a light source system (I), a wavelength lever-type laser interference system (II) and an interference signal processing and control system (III). The light source system (I) outputs orthogonal linear polarized beams of which the wavelengths are respectively λ1 and λ2, and emits same to the wavelength lever-type laser interference system (II) to form interference beams which are emitted to the interference signal processing and control system (III). In the wavelength lever-type laser interference system (II), a wavelength lever-type absolute distance measurement relationship is formed between a synthetic wavelength and a single wavelength and between a measured absolute distance and the motion displacement of a cube-corner prism (22) of a reference arm. The interference signal processing and control system (III) is responsible for detecting a phase difference between two single wavelength interference signals, calculating the measured absolute distance and controlling the change in the wavelength λ2 in the light source system (I). The apparatus can realize the measurement of any absolute distance, can realize the transition from the synthetic wavelength to the single wavelength, and is suitable for large-scale/large-sized and high-precision absolute distance measurement in the fields of large precise equipment manufacturing, spatial engineering, a measurement technique and the like. Also provided is a laser interference wavelength lever-type absolute distance measurement method.
The present disclosure discloses a device for biaxially-oriented stretching polytetrafluoroethylene hollow fiber membranes and the method thereof. The device may include a lubricant removing oven and a tube blank heating oven mounted at the outlet end of the push-compression mold, a core extension extending from the core into the lubricant removing oven and the tube blank heating oven, and a speed regulating guide wheel mounted at the outlet of the tube blank heating oven. A tube blank is extruded from a push-compression machine, inserted on the core extension for removal of lubricant in the lubricant removing oven, heated in the tube blank heating oven, transversely stretched by means of the bulked core, and then wound onto the speed regulating guide wheel for longitudinal stretching. Both transverse and longitudinal stretching can be realized for polytetrafluoroethylene tube blanks, overcoming disadvantages of traditional processing devices that can merely perform longitudinal stretching.
B29C 55/26 - Shaping by stretching, e.g. drawing through a dieApparatus therefor of tubes biaxial
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
A laser heterodyne interference linearity measuring apparatus and method having six-degrees-of-freedom detection. The laser heterodyne interference linearity measuring apparatus comprises a laser heterodyne interference linearity and position detection portion and an error detection and compensation portion; in a light path structure of the laser heterodyne interference linearity and position detection portion, a four-degrees-of-freedom error detection light path consisting of three ordinary beam splitters (2, 5, 13), a polarization beam splitter (14), a plane reflector (10), a convex lens (4), a position sensitive detector (3) and two four-quadrant detectors (15, 16) is added; by utilizing a method combining laser heterodyne interferometry and a laser spot detection method, six-degrees-of-freedom simultaneous detection on a swing angle, a pitch angle, a roll angle, horizontal linearity, vertical linearity and linearity positions of a detected object is realized, and error compensation is performed on the vertical linearity and a vertical linearity position, so that the influence of a rotating error of the detected object on a measurement result during the linearity measuring process is eliminated, and the measurement precision on the laser heterodyne interference linearity and positions thereof is improved.
A layered electromagnetic Braille display device and a Braille reading machine. The Braille display device comprises three layers of Braille display modules (8, 9, 10) and a touch pad (17). Each layer of Braille display modules (8, 9, 10) comprises five plates and multiple contact driving mechanisms for driving Braille contacts (7) to rise and reset. The touch pad (17) is provided with one or multiple rows of Braille units, and each row of Braille units comprises multiple Braille units displaying Braille characters. A microprocessor is connected to a Braille translation and conversion module, a voice play module and a contact controller, and the contact controller is connected to the Braille display device to form the Braille reading machine. The Braille display device can display one or multiple rows of Braille characters by using the working principle of electromagnetic induction, and is exquisite in structural design, low in cost, stable in performance and high in reliability; and the Braille can be updated in real time, the Braille display is synchronized with voice play, and the reading and study requirements of the blind can be satisfied.
An environment-friendly sucrose polyester emulsion used as a fabric softener and a preparation method therefor. The prepared sucrose polyester emulsion has uniform granularity, low viscosity and good stability; requires no coemulsifier or thickener, so the cost is saved and the application is simple and convenient; has a simple process and requires a few devices and a small amount of labor work; and can be stably stored and transported for a long term and is suitable for industrial production.
C08J 3/03 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
C08L 67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chainCompositions of derivatives of such polymers
Provided are a bidirectionally-stretching apparatus and method for a polytetrafluoroethylene hollow fiber membrane. The apparatus comprises a mandrel extension section extending from a mandrel. The mandrel extension section extends into a degreasing oven and a tube blank heating-up oven. The diameter of the mandrel extension section in the tube blank heating-up oven is expanded to form an expanded mandrel. By means of the apparatus and the method, a polytetrafluoroethylene tube blank can be bidirectionally stretched, thereby improving the porosity of the polytetrafluoroethylene hollow fiber membrane.
Disclosed is a method for processing a polytetrafluoroethylene filament with a circular cross-section using a cutting and hot-melt forming process. The filament is made by mixing polytetrafluoroethylene dispersive resin powder with a liquid lubricant, and subjecting same to the processes of material mixing, green compacting, calendering, longitudinal stretching, cutting, hot-melt forming etc. The method disclosed in the present invention is simple and has a low cost. The polytetrafluoroethylene filament prepared therefrom has a quasi-circular cross-section shape and a strength of 4.3 - 3.2 cN/dtex, which can substantially decrease the damage of a needle or a spunlace to the filament during the process. The filament can be widely used for treating a high-temperature tail gas in industries of waste incineration plants, coal-fired power plants, cements etc., and has notable economic and social benefits.
D01F 6/48 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of halogenated hydrocarbons
A feedback apparatus for fingertip force, comprising a positioning assembly for a fingertip force bearing face, a feedback assembly for fingertip normal pressure, a feedback assembly (14) for fingertip sliding friction force and a feedback assembly (31) for fingertip torque. The positioning assembly for the fingertip force bearing face realizes the positioning of the fingertip force bearing face through the side swaying of an external framework (15); the feedback assembly for the fingertip normal pressure realizes feedback of the fingertip positive pressure through unfolding and folding of the external framework (15); the feedback assembly (14) for the fingertip sliding friction force drives the sliding of a rotary seat (27) via levers (18, 19) and a spring (16) so as to realize feedback of the fingertip sliding friction force; and the feedback assembly for the fingertip torque drives the rotation of the rotary seat (27) via a micro servo electric motor (26) and gears (29, 30) so as to realize feedback of the fingertip torque. The feedback apparatus for the fingertip force has a compact structure, and can realize feedback of normal pressure, friction force and torque of force bearing faces of a fingertip at different positions.
The present invention discloses a processing method for laser heterodyne interferometric signal based on locking edge with high frequency digital signal. A reference signal and a measurement signal of heterodyne interferometer, after being processed by photodetector, signal amplifier, filtering circuit, voltage comparator and high frequency digital edge locking module, are transferred to pulse counting synchronized latching processing module, to obtain entire cycle interference fringe numbers and filling pulse numbers in one interference fringe cycle, of the reference signal and the measurement signal; the numbers are transferred to a computer to obtain displacement and speed of a measured object; usage of a high frequency digital pulse signal to lock the rising edge of laser heterodyne interferometric signal can improve the gradient of the rising edge of interference signal and eliminate wrong pulse caused by noises, and improve the accuracy and stability of the processing for the following signals.
G01B 11/14 - Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
G01P 3/36 - Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
A melt condensation polymerization reactor comprising an upright housing (7) tube-external falling film component (16) arranged within the upright housing (7), a heat transfer system, a film distributing apparatus, a sealing head (1) connected to the upper end of the housing (7), an upper evacuation port (19), and a bottom housing (14) connected to the lower end of the upright housing (7). The sealing head (1) is provided at the top part thereof with a material inlet (26). The bottom housing (14) is provided at the bottom part thereof with a material outlet (13). The bottom housing (14) has arranged therein a stirrer (27). The melt condensation polymerization reactor employs a reaction scheme that combines a tube-external falling film reaction and a stirring reaction and has a high condensation polymerization efficiency and even reaction temperature.
Disclosed is a melt condensation polymerization reaction method. A molten monomer blend or a prepolymer flows along the outer walls of U-shaped tubes to engage in a condensation polymerization reaction. A heat transfer medium circulates within the U-shaped tubes. Melts on the U-shaped tubes converge to the lower part of a condensation polymerization reactor to further engage in a stirring reaction and homogenization by mixing. A material is discharged upon completion of the reaction. The condensation polymerization reactor implementing the present method comprises an upright housing, an upper end sealing head, a lower end bottom housing, U-shaped tubes, a heat transfer system, a film distributing apparatus, and a helical ribbon mixer. The present reactor has the advantages of a simplified structure, full heat exchange, large film-forming area, even reaction temperature, high condensation polymerization efficiency, and plug flow-satisfying process, and can be used for melt condensation polymerization reactions of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyamide, and polycarbonate.
An inclined inwardly-transplanting wide-narrow row transplanting mechanism comprises a power transmission case (1), a left transplanting mechanism (7) and a right transplanting mechanism (3). A left power output shaft (8) and a right power output shaft (6) are assembled on the left side and the right side of the power transmission case (1), the shaft axes of the left power output shaft (8) and the right power output shaft (6) are configured to be inclined downwards and symmetrical with respect to a horizontal plane. A driven bevel gear (4) engaged with a driving bevel gear (2) on a main driving shaft (10) in the power transmission case (1) is assembled on the left or right power output shaft (8, 6). A left bevel gear (9) and a right bevel gear (5) are respectively assembled on the left power output shaft (8) and the right power output shaft (6) and engaged with each other, and the transmission ratio is 1:1. The left transplanting mechanism (7) and the right transplanting mechanism (3) are vertically mounted and meshed with the left and right power output shaft (8, 6). The left transplanting mechanism (7) and the right transplanting mechanism (3) as a whole is the inwardly inclined symmetrical structure which takes a shape of an inverse "八", and the symmetrical structure is wide at the seedling-taking part and is narrow at the seedling-transplanting part. The mechanism can achieve the inward-offset transplanting operation after taking seedling via the left transplanting mechanism and the right transplanting mechanism. The mechanism solves the technical problem of damming mud, damming water and pushing over the seedlings.
A method for processing a laser heterodyne interference signal based on high-frequency digital signal edge locking, comprising: sending a reference signal and a measurement signal of a laser heterodyne interferometer into a pulse counting synchronous latch processing module (6) to obtain the full-period interference fringe number and the filling pulse number within one interference fringe period of the reference signal and the measurement signal after processing the signals by respective photoelectric detectors (1, 8), signal amplifiers (2, 9), filter circuits (3, 10), voltage comparators (4, 11) and high-frequency digital edge locking modules (5, 12), and sending the full-period interference fringe number and the filling pulse number within an interference fringe period of the reference signal and the measurement signal to a computer through a serial port communication module (14) to obtain the displacement and the speed of an object under detection. A high-frequency digital pulse signal is used for locking the rising edge of a laser heterodyne interference signal, so that the steepness of the rising edge of the interference signal can be improved, error pulses caused by noise interference can be eliminated, a signal period will not be changed, the phase delay of the rising edge of the signal is eliminated, and the accuracy and the stability of subsequent signal processing are improved.
Provided is a conjugated cam and planetary gear train combined-type pot-grown rice seedling transplanting mechanism. The mechanism comprises a uniform/non-uniform speed driving planetary gear train mechanism (1-1), a conjugated cam swinging mechanism (1-2) and a transplanting arm (1-3). Power drives, through a central shaft (1-4) of the planetary gear train mechanism (1-1), the planetary gear train mechanism (1-1) to rotate. The planetary gear train mechanism (1-1) provides power for the conjugated cam swinging mechanism (1-2) while pulling the transplanting arm (1-3) to move. The conjugated cam swinging mechanism enables a transplanting arm shell (1-15) to rotate relative to a planetary gear (1-8), so that movement of the transplanting arm (1-3) becomes a composition of pulling movement of the planetary gear train mechanism (1-1) and relative rotation, and a sharp point of a seedling clamping piece on the transplanting arm (1-3) forms a movement trajectory in a woodpecker manner. Further provided is a high-speed pot-grown seedling transplanting mechanism of a free second-order noncircular gear planetary system. As driven by the free second-order noncircular gear planetary system, a first seedling claw (2-8) and a second seedling claw (2-8') take two unequal amplitude swings in a cycle, forming a track in a shape of a Chinese character "卜", which has a beak on the right. The transplanting mechanism has the characteristics of strong adaptability, simple structure, low cost, small vibration and high efficiency.
Disclosed are an environment-friendly paste discharge agent for textile printing and a preparation method thereof. The environment-friendly paste discharge agent comprises the following components in parts by weight: 30-60 parts of decamethyl cyclopentasiloxane, 40-70 parts of thiourea dioxide, 1-3 parts of surfactant, and 3-6 parts of glycerin, and is prepared as follows: putting decamethyl cyclopentasiloxane into a ball grinder container; adding the surfactant to be evenly dispersed or dissolved and stirring the surfactant evenly; and then adding the thiourea dioxide into the ball grinder container to blend and grind for 1-3 hours. Specific liquid compound decamethyl cyclopentasiloxane, which is used as a dispersion medium in the present invention, is not subjected to a chemical reaction with the thiourea dioxide; the thiourea dioxide is isolated from the external water and air; the stability of the thiourea dioxide is improved; the discharge effect is excellent; and the problems of low solubility, poor dispersible uniformity in discharge pulp, poor net permeability and insufficient development of the discharge effect when the common thiourea dioxide is used as the discharge agent are solved. In addition, the feel of pigment printed discharging fabric is not affected at all.
A high-performance rechargeable battery is formed of an anode, a cathode, an insulating film between the two, and an electrolyte containing anions and cations and having ion conductivity. The cathode adopts an active material dominated by the element zinc. The active material adopted for the anode is manganese dioxide electrode material capable of absorption and release of zinc ions. The electrolyte is an aqueous solution system containing zinc ions and a surfactant. The present invention adopts the modification effect of a surfactant, so that the capacity and life cycle of a battery are enhanced.
A method and a device for measuring air refractive index based on laser synthetic wavelength interference are disclosed. The laser synthetic wavelength interferometer is composed of a double frequency laser, a spectroscope, two polarization spectroscopes and two pyramid prisms. The quartz vacuum cavity is located in the measuring optical paths and is parallel with the direction of ray propagation. During the measurement, the air is conveyed to the quartz vacuum cavity until equaling the outside environment. Then, the change of the air refractive index in the cavity can cause the change of the interference signal of the wavelength λ2. The integral change number N of interference fringes of the wavelength λ2 is directly detected by photoelectric detector. Then, the pyramid prisms of the interferometer is moved, so as to make the phase difference of the interferential signal of wavelength λ1 and λ2 equal to the original phase difference before conveying the air to the quartz vacuum cavity. Based on the subdivisional principle of the laser synthetic wavelength interference fringes, the decimal fraction ε of change part of interference fringes of the wavelength λ2 is detected. Air refractive index n is computed according to the length L of vacuum cavity, the integer N of interference fringes and the decimal fraction ε. The invention has the measurement accuracy of over 10-9 and strong environment interference resisting capability.
G01N 21/45 - RefractivityPhase-affecting properties, e.g. optical path length using interferometric methodsRefractivityPhase-affecting properties, e.g. optical path length using Schlieren methods
G01N 21/41 - RefractivityPhase-affecting properties, e.g. optical path length
87.
SEPARATING-TRANSPLANTING MECHANISM OF WIDE-NARROW ROW TRANSPLANTER
The invention provides a separating-transplanting mechanism of a wide-narrow transplanter. An output shaft of a transmission case in the transplanter forms an inclination angle with the center axis of the sun gear in a planetary transmission gear system of the separating-transplanting mechanism. The output shaft of the transmission case is arranged to form an inclination angle with the input shaft of the separating-transplanting mechanism by setting a transmission of universal-joint, a pair of helical gears, combination of helical gear and spur gear, or helical internal gears between the axis of the sun gear in the separating-transplanting mechanism and a chain wheel shaft in the transmission case. Therefore the rotating working plane of a planet carrier which is mounted on the input shaft forms an inclination angle with the output shaft. Planting arms driven by the planet gears and seedling needles mounted on the planting arms move in a plane inclined relative to the output shaft. The lateral movement relative to an advancing direction produced by the inclination of the planet carrier enables seedling buried points to move leftwards or rightwards relative to seedling taking positions after the seedling needles take seedlings, and then transplanting positions form a distribution of wide and narrow rows at unequal row spaces meeting agronomic requirements on the premise that seedling taking openings are distributed at equal intervals. PCT/CN2011/072525201107030002872C18ExamineCreate
A sequential pot seedling transplanter which comprises a conveyer belt(16), a conveyer drum(18), a seedling bowl feed plat(19), a rolling cage, a bowl pressing(20), and also comprises a seedling lifting mechanism, a transmission mechanism, a bowl recovering and a seedling bowl auto-separating mechanism. The transmission mechanism and the seedling lifting mechanism eject rice seedlings that are fed to seedling bowls(30) by the rolling cage, and push the seedlings to field via guide tube; the bowl recovering mechanism recovers the seedling bowl(30); the seedling bowl auto-separating mechanism which is under the rolling cage makes connected agraffe on the seedling bowl open and the bowls drop into reclaiming box on frame.
A rotary transplanting mechanism of walking seedling transplanter. A central sprocket (3) in sprocket box (4) drives left/right gear boxes (5, 5') fixed to the two ends of central shaft (1). Fixed central gear (14, 14') meshes planetary gears (6, 6') fixed to planetary shaft (7, 7') by intermediate gears (11, 11', 13, 13') and planetary gears rotate with unequal speed relatively to gear box. A planting arm (8, 8') is fixed to an end of planetary shaft outside the said gear box, and its absolute motion is synthetic motion of unequal speed rotation of planetary gears relatively to gear box and circumferential motion of gear box relatively to shaft. The gear box is rotated through one cycle, and can make planting arms operating by once. So the said invention can be fitted for working frequency of walking seedling transplanter. Seen from side, the axes A, B, C of the planetary gear train are formed into acute angle of triangle. By optimizing structure parameters, the claws of the planting arms can travel along a path that meets the requirements of getting seedling of the claws, the angle of planting and relatively traveling path, thereby that can ensure small planting holes, reduce falling seedling and floating seedling.
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