The present invention relates to a polyimide photosensitive resin applied to ultraviolet curing 3D printing and a preparation method therefor. Raw materials for preparing the polyimide photosensitive resin comprises in parts by weight: 40-60 parts of a polyimide resin with active groups; 20-50 parts of an organic active agent; and 2-5 parts of a photoinitiator. The preparation process of the present invention is simple, and less waste liquid is generated during preparation. The prepared polyimide photosensitive resin can be used for a conventional commercial-grade SLA or DLP printer, printed products feature simple post-treatment, no need for high-temperature imidization, stable size, high strength, and good heat resistance, and the preparation process is environmentally friendly.
C08F 283/04 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polycarbonamides, polyesteramides or polyimides
100-xx0.20.2, a maximum tensile strength of greater than or equal to 490 MPa, a yield strength of greater than or equal to 167 MPa, and an elongation of greater than or equal to 124%, and thus has high strength and also has superhigh plasticity.
C23G 5/00 - Cleaning or de-greasing metallic material by other methodsApparatus for cleaning or de-greasing metallic material with organic solvents
B08B 3/12 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
B22F 1/145 - Chemical treatment, e.g. passivation or decarburisation
3.
HIGH-PLASTICITY DUAL-PHASE HIGH-ENTROPY ALLOY AND PREPARATION METHOD THEREFOR
100-xx33Ti. Moreover, the atomic radius of Ti differs greatly from that of the matrix element, which causes lattice distortion and increases the yield strength and tensile strength of the alloy. The good coherency effect between the two phases of the alloy further ensures good plasticity of the alloy. Experimental results show that the maximum tensile strength of the high-plasticity dual-phase high-entropy alloy is 710 MPa, the yield strength thereof is 400 MPa, and the elongation thereof is 62%; thus, the high-plasticity dual-phase high-entropy alloy has high strength while ensuring good plasticity.
C23G 5/00 - Cleaning or de-greasing metallic material by other methodsApparatus for cleaning or de-greasing metallic material with organic solvents
B08B 3/12 - Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
B22F 1/145 - Chemical treatment, e.g. passivation or decarburisation
4.
HIGH-ENTROPY ALLOY (HEA) WITH ROOM-TEMPERATURE SUPERPLASTICITY AND PREPARATION METHOD THEREOF
The present disclosure provides a high-entropy alloy (HEA) with room-temperature superplasticity and a preparation method thereof, belonging to the field of metal materials. In the present disclosure, the HEA with room-temperature superplasticity has a chemical formula shown in Formula I: (FeCoNiCr)100-xCux (Formula I), where in Formula I, x is 2.0 to 4.0. A FeCoNiCr alloy is used as a matrix, and then added with a trace amount of a Cu element, thereby significantly reducing formation of a metastable phase in the FeCoNiCr alloy while reducing stacking fault energy of the alloy, such that the alloy maintains a desirable work hardening ability and achieves an excellent elongation at break. Moreover, a plasticity of the alloy is further improved through twinning-induced plasticity (TWIP).
C22C 30/02 - Alloys containing less than 50% by weight of each constituent containing copper
B08B 7/02 - Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
The present disclosure relates to the field of genetic engineering or enzyme engineering, and in particular to an application of MmBBK2 in preparation of trypsin and chymotrypsin inhibitors. The MmBBK2 has the amino acid sequence shown in SEQ ID NO.1 or SEQ ID NO.2. The present disclosure clarifies for the first time that MmBBK2 in mulberry leaves has both trypsin and chymotrypsin inhibitory activity, and reveals its physical and chemical properties. The MmBBK2 has good application prospects in preparing trypsin and chymotrypsin inhibitors. On the basis of knowing its physical and chemical properties, its activity may be accordingly eliminated, promoting the development and utilization of mulberry leaf resources in animal feed, providing new perspectives and ideas for the development and utilization of mulberry leaves in animal feed and health food, and improving economic benefits of mulberry resources.
The present disclosure relates to the field of genetic engineering or enzyme engineering, and in particular to an application of MmPI in preparation of trypsin inhibitors. The amino acid sequence of the MmPI is shown in SEQ ID NO.1. The present disclosure clarifies for the first time that MmPI in mulberry leaves has trypsin inhibitory activity and reveals its physical and chemical properties. The MmPI has good application prospects in preparing trypsin inhibitors. On the basis of knowing the physical and chemical properties of the MmPI, its activity may be accordingly eliminated, thereby it promotes the development and utilization of mulberry leaf resources in animal feed, provides new perspectives and ideas for the development and utilization of mulberry leaves in animal feed and health food, and enhances the economic benefits of mulberry resources.
Provided is the use of MmPI in the preparation of a trypsin inhibitor. The amino acid sequence of the MmPI is as shown in SEQ ID NO. 1. In the present invention, it is confirmed that MmPI in mulberry leaves has a trypsin inhibitory activity, and the physical and chemical properties thereof are disclosed. The MmPI has good application prospects in the preparation of the trypsin inhibitor. On the basis that the physical and chemical properties of MmPI are confirmed, the activity of the MmPI can be eliminated in a targeted manner, so that the development and utilization of mulberry leaf resources in animal feeds are promoted, new perspectives and ideas are provided for the development and utilization of mulberry leaves in animal feeds and health foods, and the economic benefits of mulberry resources are improved.
The present invention belongs to the technical fields of genetic engineering and enzyme engineering, and specifically relates to the use of MmBBK2 in the preparation of trypsin and chymotrypsin inhibitors. The MmBBK2 has an amino acid sequence as shown in SEQ ID NO. 1 or SEQ ID NO. 2. In the present invention, it is confirmed that MmBBK2 in mulberry leaves has inhibitory activities on both trypsin and chymotrypsin for the first time, and the physical and chemical properties thereof are disclosed. The MmBBK2 has good application prospects in the preparation of trypsin and chymotrypsin inhibitors. On the basis that the physical and chemical properties of MmBBK2 are determined, the activities of the MmBBK2 can be eliminated in a targeted manner, so that the development and utilization of mulberry leaves in animal feeds are promoted, new perspectives and ideas are provided for the development and utilization of mulberry leaves in animal feeds and health foods, and the economic benefits of mulberry resources are improved.
A photosensitive polyimide resin for ultraviolet curing-based three-dimensional printing, which is prepared from 40-60 parts by weight of an active group-containing polyimide resin; 20-50 parts by weight of an organic activator; and 2-5 parts by weight of a photoinitiator. This application further provides a method for preparing the photosensitive polyimide resin.
A water and fertilizer integrated citrus drip irrigation system based on an Internet of Things technology, comprising a drip irrigation water pipe (1). An embedded pipe (2) communicated with the drip irrigation water pipe (1) is fixedly connected to the lower end of the drip irrigation water pipe (1); an accompanying guide pipe (3) is fixedly connected to the lower end of the embedded pipe (2); a drip drain pipe (6) is fixedly connected to the lower end of the accompanying guide pipe (3); an accompanying extension cavity (303) is formed in the accompanying guide pipe (3); and an auxiliary regulation and control assembly (5) is provided in the accompanying extension cavity (303). The drip irrigation depth can be regulated in the drip irrigation process according to the growth trend of a citrus root system by means of the configuration of the accompanying guide pipe (3), water expansion extension rings (4), and the auxiliary regulation and control assembly (5), and the growth direction of the citrus root system is guided by changing the position depth of moisture and fertilizer in the soil, such that the rooting stability of the citrus root system can be effectively improved, the pest resistance of the citrus can be improved, the survival rate and the fruiting rate of the citrus can be effectively increased, and the functionality of the water and fertilizer integrated system can be improved.
An atmospheric visibility prediction method based on deep belief networks (DBN) includes steps of establishing a DBN model, determining a network input parameter, preprocessing input data, preferably selecting the number of hidden layers and the number of nodes in each layer, training the DBN model and predicting atmospheric visibility. According to the method, an output layer of the DBN model is a back propagation (BP) network, an output feature vector of a restricted Boltzmann machine (RBM) is received as an input feature vector, and an entity relationship classifier is trained in a supervised way. A process of training a model by an RBM network can be regarded as initialization of a deep BP network weight parameter, such that the DBN overcomes defects that the BP network is prone to local optimization and is long in training time.
An atmospheric visibility prediction method based on a DBN. The method comprises the steps of establishing a DBN model, determining network input parameters, pre-processing input data, optimizing the number of hidden layers and the number of nodes in each layer, training the DBN model, and predicting atmospheric visibility. The output layer of a DBN model is a BP network, the output feature vector of an RBM is received as an input feature vector of the BP network, an entity relationship classifier is trained in a supervised manner, and the process of training a model by using an RBM network can be regarded as the initialization of a weight parameter of a deep-layer BP network, such that a DBN overcomes the defect of the BP network being prone to falling into local optimum and having a long training time.
A laser radar for meteorological observation, comprising a base (1). A stabilizing seat (2) is fixedly mounted at the top of the base (1); a connecting sleeve plate (3) is mounted at the top of the stabilizing seat (2); a housing (4) is mounted at the top of the connecting sleeve plate (3); a power panel (101) is fixedly mounted on a bottom surface of an inner cavity of the base (1); a snap-fit slot plate (102) is fixedly mounted at the top of the power panel (101); a connecting insert plate (103) is snap-fitted to the top of the snap-fit slot plate (102); and a fixing sleeve plate (104) is fixedly sleeved outside the connecting insert plate (103). By injecting gas into the interior, the air pressure at the bottom is increased, and the disassembly between the stabilizing seat (2) and the connecting sleeve plate (3) is achieved; the disassembly process of the connecting sleeve plate (3) and the base (1) is mainly to change magnetic poles of a positioning electromagnet (5) by switching a current direction of an external coil of the positioning electromagnet (5), such that the positioning electromagnet (5) and a locking magnet (51) are separated, so as to cooperate with a linkage assembly (6) to facilitate detachment of the base (1) and the connecting sleeve plate (3), thereby facilitating the assembly and disassembly process of the entire device.
The present disclosure discloses a laser radar for meteorological observation, and specifically relates to the field of meteorology. The laser radar comprises a base. According to the present disclosure, air pressure at the bottom of 301 is increased by injecting gas into the interior of 202, so that the 301 falls off from 201, and the disassembly between the stable seat and the connecting sleeve plates is realized; with regard to the disassembly process of the connecting sleeve plates and the base, the magnetic pole of a positioning electromagnet is changed mainly by switching the current direction of an external coil of the positioning electromagnet, so that the positioning electromagnet is separated from the locking magnet, thereby facilitating the detachment of the base and the connecting sleeve plates in combination with the linkage component, and the disassembly process of the whole device.
G01S 17/95 - Lidar systems, specially adapted for specific applications for meteorological use
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G01W 1/02 - Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
15.
GRAPHENE-LOADED NOBLE METAL COMPOSITE POWDER AND PREPARATION METHOD THEREFOR, AND SCHOTTKY DEVICE
Provided are a graphene-loaded noble metal composite powder and a preparation method therefor, and a Schottky device. Graphene oxide and a noble metal precursor are used as raw materials, and the composite powder is prepared by means of a hydrothermal reduction reaction. During the hydrothermal reduction reaction, graphene oxide and noble metal ions can be synchronously reduced, and formed noble metal nanoparticles are evenly distributed on the surface and between layers of graphene, such that the agglomeration of graphene can be effectively inhibited, and the conductivity of the graphene can be fully exerted. According to the preparation method, the raw materials are easily available, the steps are simple, the cost is low, the regulation and control flexibility is good, and the noble metal doping concentration is easy to control. A Schottky device prepared using the graphene-loaded noble metal composite powder has a relatively large Schottky barrier height and a small deviation of ideal factor from the theoretical value.
Disclosed are a graphene-supported noble-metal composite powder, a preparation method thereof, and a Schottky device. In the disclosure, graphene oxide and a noble metal precursor, as raw materials, are subjected to a hydrothermal reduction reaction to prepare the composite powder. In the process of the hydrothermal reduction reaction, graphene oxide and noble metal ions can be simultaneously reduced, and the formed noble metal nanoparticles are uniformly distributed on the surface and between layers of graphene, which effectively suppresses agglomeration of graphene, thereby fully exerting the electrical conductivity of graphene.
SHAANXI MOBO INFORMATION TECHNOLOGY CO., LTD. (China)
ZHEJIANG KUNHUAN TECHNOLOGY CO., LTD. (China)
Inventor
Pei, Jinjin
Jin, Wengang
Chen, Dejing
Geng, Jingzhang
Wang, Jinze
Huang, Yigang
Liu, Zhe
Abstract
A segmented extraction device for a nutrient solution used in giant salamander protein production, which belongs to the technical field of biological extraction, and comprises a casing assembly (1), and further comprises a liquid supply tube group (2) for outputting protein extracts of different components to the casing assembly (1); a liquid storage mechanism (3) that is rotatably sleeved on the liquid supply tube group (2), which is used to contain the protein extracts; a sliding casing mechanism (4), which is slidingly sleeved on a fixed rotation casing (301) and which is used to slidingly control the opening and closing of liquid discharge nozzles (305); and a liquid discharge member (5), which is used to control the discharge of protein extracts of different components from corresponding liquid discharge nozzles (305). By turning the liquid discharge member (5) that is placed on the liquid supply tube group (2), the protein extracts of different components may be sequentially inputted into the liquid storage mechanism (3), and in cooperation with the sliding casing mechanism (4), giant salamander raw materials are mixed, stirred and centrifuged. By using the liquid discharge member (5), the protein extracts of different components are discharged by passing through different channels, so as to achieve the segmented extraction of the giant salamander protein nutrient solution. Moreover, the extraction steps are all carried out in the same container, and thus not only is operation convenient and fast but efficiency is also improved.
A method and an apparatus for planning a vehicle lane-changing trajectory, a device, a storage medium, and a vehicle. The method for planning a vehicle lane-changing trajectory comprises: determining a start point and an end point of a path to be planned on a grid lane-changing map, the grid lane-changing map being a gridded local map that embodies lane-changing operating conditions, and the grid lane-changing map using road boundaries as map boundaries; using a potential function to assign weightings to all of the grids in the grid lane-changing map; searching for optimal solutions corresponding to different weighting requirements between the start point and the end point; performing smoothing processing on the optimal solutions corresponding to different weighting requirements to acquire lane-changing trajectories corresponding to different weighting requirements; and selecting an optimal lane-changing trajectory from the lane-changing trajectories corresponding to different weighting requirements.
The vehicle lane changing trajectory planning method includes: determining a starting point and an end point of a to-be-planned path on a grid lane changing map, which is a gridded local map reflecting a lane changing condition and takes a road boundary as a map boundary; performing weight allocation on all grids in the grid lane changing map by using a potential function; searching for optimal solutions corresponding to different weight requirements between the starting point and the end point; smoothing the optimal solutions corresponding to the different weight requirements to obtain lane changing trajectories corresponding to the different weight requirements; and selecting an optimal lane changing trajectory from the lane changing trajectories corresponding to the different weight requirements.
An intelligent welding device, comprising a welding gun (3), a guide mechanism, a driving mechanism, a clamp (2) mechanism and a control system (11), wherein the welding gun is arranged on the guide mechanism; the driving mechanism is used for driving the welding gun to move along the guide mechanism; the clamp mechanism is used for fixing a workpiece to be welded; the control system is electrically connected to the welding gun, the guide mechanism, the driving mechanism and the clamp mechanism; and the control system is used for controlling the operation of the welding gun, the driving mechanism and the clamp mechanism. The guide mechanism comprises multiple guide blocks (100) and guide wheels (13). The multiple guide wheels can form any guide rail by means of changing the positions of the guide wheels on the guide blocks, and the driving mechanism can move the welding gun along a preset track in the guide mechanism, such that a moving track of the welding gun is parallel to a welding seam so as to complete the welding of any curve or straight welding seam in a plane.
B23K 37/04 - Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
B23K 37/02 - Carriages for supporting the welding or cutting element
21.
Desalination device with graphene filtering for the production of drinking water
The invention relates to an anti-blocking seawater desalination device based on graphene filtering, comprising heating device, solar heat-collecting device, fresh water condensation heat-exchange device and thermal-expansion and cold-shrinkage control valve mechanism; the heating device can fully heat and distill seawater, the sprayed seawater is distilled by graphene heat-conduction layers to improve the distillation efficiency and avoiding blocking; the distilled water vapor enters into fresh water condensation heat-exchange device to exchange heat with seawater, increasing the seawater temperature, making full use of the heat in water vapor, and increasing water vapor condensation speed; the distilled concentrated seawater enters into the thermal-expansion and cold-shrinkage control valve mechanism, the flow of seawater entering into the heating device is controlled by the concentrated seawater temperature, when the temperature is too high, the flow of the seawater entering into the heating device increases, and when the temperature is too low, the flow decreases.
A single screw extrusion sprayer of a 3D printer includes a drive mechanism, a stir mechanism, and an extrusion mechanism. A side of the drive mechanism is connected to the stir mechanism to drive the stir mechanism to rotate, and another side of the drive mechanism is connected to the extrusion mechanism to drive the extrusion mechanism to rotate. The extrusion mechanism is connected to the stir mechanism to deliver stirred particles to the stir mechanism. The single screw extrusion sprayer has a compact structure and a light weight, and can be used in desktop 3D printers. The particle material can be melted for 3D printing.
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B29C 64/106 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
B29C 64/118 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
23.
Organic glass, and preparation method and use thereof
An organic glass includes an acrylic plate, a methyl methacrylate layer, and a fluorescent bubble layer that are sequentially stacked; and the fluorescent bubble layer is prepared from fluorescent polymethyl methacrylate beads, a first methyl methacrylate prepolymer and a second methyl methacrylate prepolymer. The fluorescent polymethyl methacrylate beads added into the raw material of the organic glass have an expandable characteristic, and can generate bubbles according to a design pattern to achieve the purpose of controllable bubbles, and the added fluorescent polymethyl methacrylate beads show fluorescent green under ultraviolet irradiation, giving bubbles a fluorescent color, and enabling the organic glass to have extremely artistic and decorative effects.
B32B 5/20 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer containing foamed or specifically porous material foamed in situ
B29C 44/12 - Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
B32B 5/30 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer comprising granules or powder
B32B 17/10 - Layered products essentially comprising sheet glass, or fibres of glass, slag or the like comprising glass as the main or only constituent of a layer, next to another layer of a specific substance of synthetic resin
B32B 27/06 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance
B29K 33/00 - Use of polymers of unsaturated acids or derivatives thereof, as moulding material
B29K 105/04 - Condition, form or state of moulded material cellular or porous
24.
Polishing fluid for improving surfaces formed by fused deposition molding with abs and method of preparing same
Disclosed is a polishing fluid for improving surfaces formed by fused deposition molding with ABS, consisting of 30%-40% by weight of polymethyl methacrylate and 60%-70% by weight of a mixture. This application further discloses a method of preparing the polishing fluid by mixing under heating. The polishing fluid provided herein can quickly form a film on surfaces of the workpiece to be processed and fill depressions of the surfaces of the workpiece while dissolving the protrusions on the surfaces to render the surfaces smooth and even.
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B32B 3/10 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material
B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling
B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
26.
Device and method for breeding blueberry-specific mycorrhizal fungi
A device and a method for breeding blueberry-specific mycorrhizal fungi. The device includes a container, where a bottom of the container is laid with perlite to form a perlite layer; an absorbent cotton is arranged on the perlite layer; a hole for planting is provided in the absorbent cotton and blueberry tissue culture seedlings or moss seedlings are placed in the hole; and a spore transfer solution is provided around the blueberry tissue culture seedlings or moss seedlings. When used as a bacterial fertilizer for inoculation in the field, the pieces of absorbent cotton are buried directly around the blueberry roots; while used for research, one of the pieces of the absorbent cotton is washed with sterile water and filtered with a filter paper to obtain mycorrhizal fungi spores.
The present invention discloses a preparation method for a surface molding film of a PVC-based stone plastic composite board, including: surface activation treatment of the PVC-based stone plastic composite board: preparation of an activated putty, coarse roughening of a substrate surface, application and solidification of the activated putty, and fine roughening of the substrate surface; preparation of a PMMA slurry; and surface film forming of the PVC-based stone plastic composite board. The PVC-based stone plastic composite board coated with a PMMA film is obtained by cold pressing and shaping in a mold, tightening up a clamp, solidifying at low temperature, treating at high temperature, cooling and demolding. The PVC-based stone plastic composite board coated with the PMMA film prepared by the present invention can avoid the problems of large investment in production lines and equipment and high production costs involved in the production of floorboards by the conventional surface printing and surface laminating technologies, to partially replace composite floorboards, stone, acrylic panels, and curtain wall panels, etc. currently popular in the market, and provide a new path for the high additional utilization of waste.
patents
