1128results about How to "Strong controllability" patented technology

The invention discloses a preparation method of a chelate coating with copper ions capable of controllably catalyzing release nitrogen monoxide and a polyphenol complex. The preparation method comprises the following steps: soaking a target modified material or an instrument in a mixed aqueous solution consisting of soluble metal salt, soluble copper salt and a compound having an o-phenol structure; and depositing a layer of chelate coating with copper ions with a function of catalyzing nitrogen monoxide and the polyphenol complex on the surface. The chelate coating with the copper ions and the polyphenol complex, which is obtained by the preparation method disclosed by the invention, not only has excellent biocompatibility and bacterial resistance, but also has a function of inducing catalysis of endogenous nitrogen monoxide to release in a blood environment. In addition, the coating is nearly applicable to surface modification of materials of all textures, complex geometrical shapes and different topological structures.

The invention discloses a dynamic polymer material. The dynamic polymer material comprises a product obtained through reaction of the following components: at least one polyol compound containing two or more 1,2-diol motifs or 1,3-diol motifs as well as at least one phenylboronic acid compound containing two or more phenylboronic acid motifs provided with aminomethyl groups in ortho-positions. Dynamic reversible phenylborate bonds are formed through the reaction of the components and then constitute a dynamic cross-linked polymer. The polymer material has reusability and recoverability because of the dynamic reversibility of the special phenylborate bonds; besides, when the polymer material adopting a specific formula receives external force, dynamic bonds break preferentially to have energy dissipation and stress elimination functions, so that the material has good toughness. The material has broad application prospect in the fields of military space equipment, functional paint and coatings, biomimetic materials, biomedical materials and the like.

The invention relates to a power driven system of the aircraft, which is characterized in that the power driven system comprises a power supply, a motor and a bearing support. The motor is vertically arranged in the bearing support by a bearing. Both the stator and the rotor of the motor are extending upwards and are respectively provided with propellers. The upper ends of the stator and the rotor where the propellers are arranged are coaxially sleeved, and the lower end of the rotor is fixed with a rotary disc after stretching out of the bearing support, an electromagnet with the magnetic pole part near the rotary disc is fixed-arranged outside the bearing support. When the motor is electrified, both the rotor and the stator drive the propellers to rotate to acquire power at the same time, and the power is transmitted to the frame by the bearing support to drive the aircraft to rise or advance. Meanwhile the electromagnetic moment between the electromagnet and the rotary disc is used to counteract the friction torque, and control the size of the electromagnetic moment to achieve the turning of the aircraft. The power driven system has the advantages of solving the problem of anti-torque of the propeller, satisfying the design requirements of miniature, simplification and lightness of the aircraft, and being beneficial to the popularization and manufacturing of the aircraft.

The present invention relates to a comprehensive treatment technique of restaurant kitchen garbage. Said technique includes the following steps: firstly, removing non-degradable components from said restaurant kitchen garbage, then breaking said garbage, making hydraulic separation to form cream liquor of organics. Said invention mainly includes three-stage high-speed centrifugal separation process, in which first stage centrifugal separation utilizes the cream liquor formed by hydraulic separator to produce solid dregs and oil-water mixture phase; second stage centrifugal separation utilizes the above-mentioned oil-water mixture phase to produce waste oil and clear water phase containing rich organics; the clear water phase and the above-mentioned cream liquor formed by blending solid dregs produced by first centrifugal separation are fed into fermentation tank, undergone the process of aerobic fermentation so as to form solid-liquid mixture, then the solid-liquid mixture is fed into third stage high-speed centrifugal machine to make solid-liquid separation to obtain heavy phase and light phase. Said heavy phase is solid fertilizer and the light phase is liquid biological organic fertilizer.

The invention discloses a self-repairing polyurethane coating and a preparation method thereof. The polyurethane coating comprises the following raw materials in parts by mass: 15-20 parts of polyisocyanates, 40-60 parts of hydrophilic polyester polyol or polyether polyol, 2-3 parts of a chain extender and 7-15 parts of methylcystein. The preparation method comprises the following steps: preparing a hydrophilic polyurethane prepolymer from hydrophilic polyester polyol or polyether polyol and the chain extender, and reacting the isocyanate group in the hydrophilic polyurethane prepolymer with methylcystein, so as to obtain a polyurethane material of which the tail end or the main chain contains 2-urea-4-pyrimidone units; spraying or coating the polyurethane material on the surface of a substrate, thereby obtaining the self-repairing polyurethane coating. The self-repairing of the self-repairing polyurethane coating disclosed by the invention can be completed without external repairing agent or requirements of special environment, the coating is good in transparency, high in strength, good in filming property, simple in process and low in cost, and the function of repeated repairing in same positions can be achieved.

The invention relates to a device for treating dye wastewater by a dielectric barrier discharge technology and a method thereof. Uniform grooves are processed on a surface of a metal negative plate to make dye wastewater formed into a uniform liquid film on the surface of the negative plate; a metal column closely clings to a dielectric barrier inner wall to form a sleeve structure, the distance between the sleeve and the negative plate is adjusted to form dielectric barrier discharge between the negative plate and a high-voltage electrode, and pollutants are degraded by O3, .OH, H2O2, high-energy electrons, ultraviolet light and the like generated in the discharge process; unused ozone and other active substances generated in reaction are injected into a container through a micropore aeration device so as to further degrade organic matter in the dye wastewater; and in addition, Mn2+, Cu2+, Zn2+, Co2+ and other metal ions or MnO2, FeOOH, TiO2, active carbon and other heterogeneous catalysts are added into the reaction container to strengthen a treatment effect.

An electrode material of Fe¿CLi phosphate and its composite metal phosphate is electrode material of LiFePO4 and LiFePO4 / MxP in high density spherical shape with diameter of 2micro m. The electrode material of LiFePO4 and LiFePO4 / MxP can be prepared by low ¿C temperature controllable one ¿C stage atomizing process in short flow.

The invention discloses a high-resilience self-repair high-polymer aquagel and a preparation method thereof. The high-resilience self-repair high-polymer aquagel is prepared from the following raw materials in parts by mass: 15-20 parts of polyisocyanate, 40-75 parts of hydrophilic polyester polyol or hydrophilic polyether glycol, 1-5 parts of acrylate monomer, 10-15 parts of acrylamide monomer, 0.5-2 parts of chain extender, 1-3 parts of surfactant, 0.1-1 part of alkyl acrylate monomer and 0.5-2 parts of catalyst. The preparation method comprises the following steps: preparing an acrylate-monomer-terminated hydrophilic polyurethane high-polymer monomer self-assembly and an alkyl acrylate micelle; and carrying out radical copolymerization with acrylamide monomer under the photoinitiation action. The obtained self-repair high-polymer aquagel can complete self repair on self damage without any repair agent or specific environment, and has excellent resilience and physical and mechanical properties.

The invention relates to a parallel vibration isolation buffer based on the magnetic rheomorphism technology, which is composed of a magnetic rheologic elastic body buffer and a magnetic rheologic liquid buffer, which are connected in parallel. The magnetic rheologic elastic body buffer is composed of a connecting rod and a magnetic rheologic elastic body shearing ring; the magnetic rheologic elastic body shearing ring is composed of a magnetic rheologic elastic body, a coil winding and a field core; each of the right side and the left side is provided with a group of coil winding and a group of field core; the field core is composed of two hemicycle iron cores and the magnetic rheologic elastic body is respectively held between the two hemicycle iron cores of each set to form the magnetic rheologic elastic body shearing ring, the two sets of the magnetic rheologic elastic body shearing rings are connected organically by the connecting rod; the magnetic rheologic liquid buffer is arranged between the two sets of magnetic rheologic elastic body shearing rings and is fixed between the upper connecting rod and the lower connecting rod, and is connected with the two sets of magnetic rheologic elastic body shearing rings in parallel structurally. The device can control the structural rigidity and the damp, reduce the impact and vibration on the system from the outside and has the advantages of good controllability, wide dynamic range, high response speed, low power consumption and so on; furthermore the device has strong environmental conformability.

The invention provides a niobium, titanium and boron microalloy hot-rolled ribbed bar (HRB) 600 high-performance aseismic reinforcing bar and production of the niobium, titanium and boron microalloy hot-rolled ribbed bar (HRB) 600 high-performance aseismic reinforcing bar. Through molten steel smelting, molten steel casting, billet controlled rolling and controlled cooling, the niobium, titanium and boron microalloy HRB600 high-performance aseismic reinforcing bar is produced and comprises the following chemical constituents according to mass ratio: 0.14-0.18% of C, 0.30-0.50% of Si, 0.50-0.75% of Mn, 0.50-0.70% of Cr, 0.030-0.050% of Nb, 0.0015-0.0030% of B, 0.020-0.040% of Ti, no more than 0.045% of S, no more than 0.045% of P and the balance of Fe and unavoidable impurities. The niobium, titanium and boron microalloy HRB600 high-performance aseismic reinforcing bar has the characteristics of low production cost, technological applicability, strong controllability and the like, the steel microstructure is uniformly distributed and has good form, the refining effect of ferrite is obvious, and the niobium, titanium and boron microalloy HRB600 high-performance aseismic reinforcement has good low-strain timeliness, high strength, good toughness, good welding performance, excellent aseismic performance and excellent combination property.

The invention discloses a process and device for disposing wastewater adopting low temperature plasma technology, wastewater is pumped into water distributing machine and sent into a water distributing plate by a water pump, wherein the upper portion and the lower portion of the water distributing plate are respectively provided with a high-pressure stage and an earth electrode, a silex glass plate is mounted between the water distributing plate and the high-pressure stage, leading the silex glass plate to form a medium to resist discharge, use O3, H2O2, OH, H, O, high-energy electrons and ultraviolet light which produce in the process that the medium resists discharge, and pollutants in wastewater which flows on the water distributing plate to make reaction, thereby achieving the target of removing pollutants. The method is capable of proceeding in normal temperature and pressure, reaction condition with strong steerability is moderate, device and operation of the reaction are simpler, the active materials like high-energy electrons, O3, H2O2 and OH, H, O which produce in the reaction process react with pollutants in wastewater without choice, and degrades pollutants into carbon dioxide, water and simple organic matter.

The invention relates to a rare-earth-based SCR denitration catalyst and a preparation method thereof, and belongs to the technical field of environmental catalysis. The catalyst is a denitration catalyst which is compounded from CeO2 and TiO2 at the medium and low temperature, the active component of the catalyst is cerium dioxide, the carrier is titanium dioxide, and the assistant is transition metal and rare earth metal oxide; and the structural formula of the catalyst is CeO2-MOx / TiO2, CeO2 / Mox-TiO2 or CeMTiOy, wherein M is one or several kinds of compounds selected from Al, Si, Y, Zr, Nb, Mo, Sn, Sb, La, Pr, Nd, Sm and W, x ranges from 1 to 3 and y ranges from 2 to 5. The invention has the advantages that no toxic substance V2O5 is used in the catalyst, the catalyst has good NO(i) x( / i) conversion rate, N2 selectivity and NH3 conversion rate in the range of 200-500 DEG C, the SO2 conversion rate is small, the H2O and alkali metal poisoning prevention capability is superior to that of commercial vanadium-titanium catalysts.

The invention relates to medical equipment, particularly a medical scaffold with an inner coating film, and a preparation method for the medical scaffold, and belongs to the field of medical equipment. In the medical scaffold with the inner coating film, a non-woven inner coating film of which fibers are distributed on the axial direction of the medical scaffold is prepared on the inner surface of an inner film by an electrospinning method by taking a coating film scaffold as a basis, wherein the coating film scaffold consists of a netlike scaffold which is formed by weaving medical alloy wires, an electrospinning non-woven inner film and an electrospinning non-woven outer film; and the thickness of the inner coating film is 2 to 6 mu m. During preparation of the medical scaffold with the inner coating film, the inner coating film, the inner film and the outer film are prepared sequentially, and the inner coating film in the medical scaffold improves the biocompatibility with tract tissues of a human body, facilitates adhesion, migration and reproduction of endothelial cells at two ends of the medical scaffold, promotes quick endothelialization of the medical scaffold, and prevents the medical scaffold from becoming narrow again. The preparation method for the medical scaffold is simple, convenient to operate, and low in cost, and suitable for preparation of medical scaffolds with different diameters and lengths.

The invention discloses a convenient and effective video session managing and controlling system and method, the system comprises a video session service management system, a MCU, a system management terminal and a session management terminal; wherein the video session service management system is used for session scheduling, managing and controlling platform, the MCU is used for the access of session terminal and process of the media; the session management terminal is set according level and field, the lower level the lower range of field and the session management terminal authority; the system management terminal is responsible for the scheduling, control and monitoring of the session; the system management terminal is responsible for managing all terminal lists and field structure, while the session management terminal manages the corresponding level and the lower terminal lists and field structure. Each level field and each level session management terminal is set by the responsibility of system management terminal, or the system management terminal sets the higher field and higher session management terminal, and sets the lower field and lower session management terminal by the higher session management terminal in its own field range.

The invention discloses a device for preparation of superfine spherical metal powder on the basis of a uniform droplet spray method. The device comprises a shell, a crucible and a powder collection area, and the crucible and the powder collection area are arranged in the shell. The device is characterized in that a thermocouple is arranged in the crucible, sensing heaters are arranged outside the crucible, and a nozzle with small holes is arranged at the bottom of the crucible; the powder collection area comprises a collection plate and a rotary circular plate, the collection plate is arranged at the bottom of the shell, and the rotary circular plate is connected with a motor and arranged above the collection plate. The invention further discloses a method for preparation of the superfine spherical metal powder. The method for preparation of the superfine spherical metal powder is mainly combined with the uniform droplet spray method and a centrifugal atomization method to prepare metal power narrow in particle size distribution interval, high in sphericity, excellent in liquidity and spreadability, controllable in size, free of satellite droplets and accordant with the utilization requirement on 3D (three-dimensional) printing.

The invention relates to a technique for microbe oil extraction, in particular to a method for regulating and controlling a microbial community for the oil extraction. The method comprises the following regulating and controlling steps of: firstly, performing field sampling and detection on a goal oil deposit; secondly, judging a structure and the nutrient deficiency condition of the oil deposit microbial community according to a detected result, and then determining a preliminary regulation and control scheme; thirdly, optimizing the preliminary regulation and control mode by using a microbeoil displacement physical simulation experiment, and then determining a final regulation and control scheme; and finally, performing field implementation according to the optimized final regulation and control scheme. The invention provides the method for regulating and controlling the microbial community to be evolved into the goal structure in different phases of the field implementation, whichfurther improves the recovery ratio of the microbe and the effect of the field implementation.

The invention relates to a preparation method of superfine modified kaolin, which is characterized in that the preparation method comprises the following steps that (1), kaolin powder and carbamide are uniformly mixed in an open container, and fully absorb moisture in air to form a mixture; (2), the mixture is heated, and reacts at 70-120 DEG C; a kaolin-carbamide intercalation compound is prepared; an intercalation rate is 80%-98%; (3), the compound is placed into a ball mill; a certain amount of dispersing agent and water is added; wet grinding is conducted; the content of ground kaolin with a particle size less than 2 micrometers is above 90%; a kaolin mud cake is obtained through suction filtration and dehydration; (4) a certain amount of silane coupling agent and water is added into the kaolin mud cake, and stirred at 50-80 DEG C; a coupling reaction happens; the modification is achieved; and (5) the modified kaolin is dried, and the finished superfine modified kaolin is prepared. According to the preparation method, the intercalation rate is high; the influence on a crystal structure of the kaolin is small; a peeling effect is good; and the prepared superfine modified kaolin is particularly applicable to rubber and plastic materials and oil paint.

The invention provides a method for preparing a graphene nanopore array, which comprises the following steps: 1) coating a carbon source solution on the surface of a porous anodic alumina (PAA) template; 2) pressing the PAA template with the carbon source coated on the surface (obtained in the step 1)) on the surface of a metal base, peeling the PAA template, and ensuring that the carbon source is reserved on the surface of the metal base and the carbon source reserves a pattern which is consistent with that on the surface of the PAA template; and 3) performing annealing treatment on the obtained metal base in the presence of a mixed gas flow of hydrogen gas and argon gas, thus converting the carbon source into the graphene nanopore array. The nanopore array obtained by the invention is an interconnected nanopore array structure rather other a single nanopore or several nanopores; and the pore size of the nanopores can be regulated through the template effect of the PAA itself, and can be further regulated through growing and etching in the later stage. Thus, the pore size controllability is very excellent.

The invention relates to a LED light source system with flexural and adjustable light spectrum, and the LED light source system belongs to the photobiology research instrument field. The invention mainly comprises system hardware, system software, and a light spectrum flexible combination and adjusting method. The LED is connected with a LED array substrate in a movable plug way, so as to form a unit module and to build a LED array; the LED array is connected with a LED constant current drive circuit, the circuit is connected with a controller through a data line and a supply line, and then is connected with a power supply. The light spectrum flexible combination and adjusting method comprises a wavelength combination, the light density adjusting, the photoperiod adjusting and control, and the operation frequency adjusting and control. The invention solves the problems that the traditional light source cannot provide multi optical spectrum parametric combination, and cannot exactly quantify and modulate the optical spectrum parameters, can perform flexural modulate to the optical spectrum parameters according to the demands of the photobiology research experiment, and can get series light source of the multi optical spectrum parametric combinations with different wavelengths, different light densities, different photoperiods and different operational frequencies through exact quantification.

The present invention relates to a preparation method of ferric oxide hollow ball, the grain size of which can be controlled. In the present invention, the inorganic iron salt and urea are used as raw material and is dissolved in a mixture system of inferiority monohydric alcohol and water; the iron-containing precursor is obtained by the coprecipitation technique, and then is dispersed into the inferiority monohydric alcohol / water mixture system, finally is heated to a certain temperature with a certain reaction time under the condition of hot mixed solvent, thereby, the ferric oxide(alpha-Fe2O3)submicron grain with single crystal hollow structure, narrow particle size distribution and excellent dispersity is obtained. The hollow ball with controlled grain can be obtained by simply adjusting the compounding ration of the reaction system. The present invention has the advantages of simple system, high output, even grain, pure product, easy separation process and excellent crystallinity, and is adapted to industrialization production.

The invention provides a wind turbine generator health management method based on machine learning algorithm platform. The health management method includes: theoretical power generation balance analysis, performance grade evaluation, fault diagnosis model and health management model design, health evaluation and health analysis, health management is the realization of condition-based maintenance.According to the deep application of the theoretical electric quantity balance analysis method, Combining Big Data Technology, through the combination of machine learning and artificial intelligence,to realize the prediction and evaluation of the health status of the fan and its accessories and main equipment, finally, the maintenance mode of wind turbine generator system is transited from planned maintenance and fixed maintenance to condition-based maintenance, so as to reduce the power loss of planned maintenance, unplanned maintenance and performance loss of wind turbine generator system,so as to achieve the goal of increasing the power generation of wind farm station and improving the economic benefit of wind farm station.

The invention discloses a preparation method and application of a graphite phase carbon nitride nanosheet visible-light-induced photocatalyst synthesized by promotion of ionic liquid and belongs to the technical field of material preparation and photocatalysis. A graphite phase carbon nitride nanosheet material is formed by using room-temperature ionic liquid of urea and dialkyl imidazolium tetrafluoroborate as a precursor through high-temperature co-polymerization. The graphite phase carbon nitride prepared by the preparation method has a low-dimensional nanosheet layer microstructure and a suitable forbidden bandwidth and shows more efficient photocatalytic hydrogen production performance than that of conventional body phase carbon nitride under the visible light. The graphite phase carbon nitride nanosheet visible-light-induced photocatalyst synthesized by promotion of the ionic liquid is simple in synthetic process, is low in cost, has high photocatalytic efficiency, accords with the actual production requirement and has a wide application prospect in the field of photocatalysis.

The invention relates to an adsorbing material performance testing device and a using method of the adsorbing material performance testing device. The adsorbing material performance testing device comprises a main body testing system, a thermodynamic desorption system, an automatic control system, an air compressor, an air filtering dehumidifier, a testing gas generation source, an air drying part, a gas mixer, an electromagnetic flowmeter, a temperature and humidity sensor, a pressure sensor, a temperature and humidity controller, a solenoid valve, an upstream gas sampling hole, an adsorption tank, a sealing ring, an adsorbent barrel, an adsorbent barrel coupling, an annular sampling ring, a segmental gas sampling hole, a gas concentration detector, an elastic pipe section, a downstream gas sampling hole, a vacuum pump, an air cylinder swinging arm, an oscillating cylinder, an electronic balance, a reciprocating cylinder, a circuit and a main machine; the adsorbent performance testing system has regulation performance under certain pressure at certain temperature in a certain humidity range due to cooperation of the above components, the adsorbing material performance testing device can be applied to the competition and interference action mechanism when researching adsorption of all components of mixed gas. The adsorbing material performance testing device has the characteristics of advanced and reasonable structure, automation control and complete function, and can be operated simply and rapidly and the like.

The invention discloses a stretchable or bendable composite circuit system and a fabrication method thereof. The method comprises the following steps of S1, fabricating an elastic shape memory polymer; S2, pre-stretching the elastic shape memory polymer fabricated in the step S1 by 10-150% under 60-120 DEG C, cooling to a room temperature and fixing a temporary shape of the elastic shape memory polymer; S3, fabricating a circuit system in the pre-stretched elastic shape memory polymer or a surface of the pre-stretched elastic shape memory polymer by a spraying or pasting or circuit printing process; and S4, heating and trigging the elastic shape memory polymer processed in the step S3 to restore, and causing the circuit system to form drape and obtain the stretchable or bendable composite circuit system. The invention also discloses the stretchable or bendable composite circuit system. The elastic shape memory polymer is employed to be combined with the relatively rigid circuit system so as to achieve a bendable / stretchable effect of a circuit.

The invention discloses a method for preparing silver nanowires. The silver nanowires are prepared controllably by the self-assembly characteristic of micelle of amphiphilic hyperbranched polymer. The method comprises the following specific steps of dissolving or dispersing the amphiphilic hyperbranched polymer in polyhydric alcohol; adding halogenous inorganic salt or sulfurated inorganic salt in the mixture; adding silver salt in the mixture after the halogenous inorganic salt or sulfurated inorganic salt is dissolved in the mixture completely; placing obtained mixed solution in a sealed reaction kettle; performing constant-temperature reaction at a certain temperature in a range of 120-240 DEG C; naturally cooling down a reaction product to obtain raw products of silver nanowires; and washing the raw products by using organic solvent and centrifugally separating the raw products to obtain the silver nanowires. A one-kettle solvothermal method is used, the amphiphilic hyperbranched polymer is used for preparation of the silver nanowires, and the silver nanowires with uniform sizes and morphologies can be obtained. The steps of the method are simple and are easy to operate; the controllability and the reproducibility are high; and the silver nanowires are easily produced in batches.

The invention discloses a force-induced response dynamic polymer. The polymer chain skeleton contains at least one force-sensitive group and at least one boron-free dynamic covalent bond, optionally contains at least one boron-containing dynamic covalent bond, and also optionally contains at least one supramolecular interaction; and under the action of mechanical force, the force-sensitive group in the dynamic polymer is subjected to chemical and / or physical change to realize force-induced response. According to the dynamic polymer, the force-sensitive group with a force-induced response characteristic, the boron-free dynamic covalent bonds with different dynamic properties, the optional boron-containing dynamic covalent bond and the supramolecular interaction are introduced, so that the force-induced response dynamic polymer material with a wide controllable range, a rich structure and various properties can be prepared. The force-induced response dynamic polymer can be widely appliedas a functional coating with a force-induced response function, a self-repairing material, an energy storage device material, an energy absorbing material, a photoelectric device material, a mechanical probe and the like.

The invention belongs to the field of wind power generation and particularly relates to a device for monitoring inclination and settlement of a tower of a wind generation set. The device is characterized by comprising a laser transmitting and receiving unit, a signal processing and operating unit, a communication unit and an upper computer; the laser transmitting and receiving unit is composed of three laser distance measuring sensors and three laser baffle boards; the laser distance measuring sensors are used for measuring the distance between the sensors and the baffle boards. When the tower inclines or settles, the distance between the sensors and the baffle boards, namely detection data of the three laser distance measuring sensors, are changed, the detection data are processed through an algorithm in the signal processing and operating unit, results obtained through operation are sent to the upper computer to be displayed in real time through the communication unit, and the inclination angle and the settlement distance of the tower are obtained. According to the device, online monitoring for inclination and settlement of the tower of the wind generation set is achieved by combining the laser distance measuring and multi-point positioning technique with an effective calculation method, and the device has the characteristics of being accurate and high in precision.

The invention provides a method for growing an InGaP / GaAs / Ge three-junction solar cell on a silicon substrate. The method comprises the following steps of: epitaxially growing a GexSi1-x stress transition layer with gradient components on the silicon substrate; forming a Ge thin film layer with fully relaxed stress on the stress transition layer; and performing the epitaxial growth to form the InGaP / GaAs / Ge three-junction solar cell comprising a bottom Ge sub-cell, a middle GaAs sub-cell and a top InGaP sub-cell on a Ge / GexSi1-x / Si template. By substituting the Si substrate of low cost for the expensive Ge substrate necessary for a conventional growth method, the method is used for the growth of the high-efficiency solar cell; and meanwhile, the InGaP / GaAs / Ge three-junction solar cell of larger area and lower defect density can be grown on the Si substrate so as to greatly reduce the production cost of the InGaP / GaAs / Ge three-junction solar cell.

The invention relates to an electrostatic spinning method and device of a fiber-based waterproof moisture-permeable film high in moisture-permeable flux. The electrostatic spinning method includes that during electrostatic spinning, polymer solution jet flow is injected at a certain included angle with air of a certain temperature and / or lateral air flow of non-solvent steam, and polymer molecules in the jet flow are quickened to be separated and solidified into fibers; water-pressure resistance of the electrostatic spinning film, namely the fiber-based waterproof moisture-permeable film high in moisture-permeable flux is greater than or equal to 100kPa, and the moisture-permeable flux is greater than or equal to 15000g / m<2> / d. The electrostatic spinning device is composed of an electrostatic spinning box, a high-voltage direct-current power supply, an electrostatic spinning hydraulic system, a spinning jet and a receiving base material, and a steam generation and air supply system is mounted on one side of the electrostatic spinning box. The fiber-based waterproof moisture-permeable film produced by the method has the advantages of small bore diameter, controllable adhesion degree and high porosity; the film is high in water-pressure resistance and moisture-permeable flux when used in the waterproof and moisture-permeable areas, and is wide in actual application prospect.

The invention relates to a super fast preparation method of a flawless photonic crystal. The method of the invention employs spin coating, spraying or ink-jet printing, and comprises the steps of: mixing monodisperse emulsion particles, water-soluble polymer monomer, cross-linking agent, initiator and water to obtain a mixed emulsion, and coating or printing the mixed emulsion to the surface of a hydrophilic flexible base material; then carrying out thermal initiation polymerization on water-soluble polymer monomers among the monodisperse emulsion particles in the mixed emulsion to form a polymer, so as to obtain a flawless large-area composite opal structured photonic crystal, which uses the monodisperse emulsion particles as a skeleton and has polymer filled in gaps of the monodisperse emulsion particle skeleton, or a flawless and large-area patterning composite band gap composite opal structured photonic crystal, which uses the monodisperse emulsion particles as a skeleton and has polymer filled in gaps of the monodisperse emulsion particle skeleton. The monodisperse emulsion particles used as the skeleton in the composite opal structured photonic crystal are further dissolved by a solvent to obtain a flawless large-area inverse opal structured photonic crystal and a flawless and large-area patterning composite band inverse opal structured photonic crystal.