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Graphene transistor based on metamaterial structure, optical sensor based on metamaterial structure, and application of graphene transistor

Disclosed are a graphene transistor based on a metamaterial structure, an optical sensor based on a metamaterial structure, and application of the graphene transistor. The graphene transistor sequentially comprises a liner, a grid metal layer, a grid medium layer, a grapheme layer and a source and drain metal layer from bottom to top. At least local area of the source and drain metal layer is provided with a periodicity micro-nano structure. The periodicity micro-nano structure, the grid metal layer and the grid medium layer match to form the metamaterial structure with the feature of complete absorption. By changing refractive index, thickness and the like of the periodicity micro-nano structure and the grid medium layer material, optical absorption frequency range of the metamaterial structure can be adjusted. Due to the feature of perfect wavelength selectivity absorption, higher flexibility and narrow-band response of the metamaterial structure, the graphene transistor can work under visible light to infrared even longer wave bands by selecting different metamaterial structures. By integrating optical sensor working in different wave bands, image sensors, spectrum detecting analyzing device and the like which can work in ultra-wide bands can be formed.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

Wireless energy transmission device

The invention discloses a wireless energy transmission device which comprises a power source, a transmitting device and a receiving device; the transmitting device comprises a transmitting coil and an efficiency regulation transmitting network used for regulating the efficiency optimal equivalent transmission impedance Zeqt at the two ends of the transmitting coil to the optimal load impedance Zsof the power source; one end of the efficiency regulation transmitting network is connected with the transmitting coil, and the other end of the efficiency regulation transmitting network is connected with the power source; the receiving device comprises a receiving coil which performs energy coupling through an alternating electromagnetic field and the transmitting coil and an efficiency regulation receiving network used for regulating the received load impedance ZL to the efficiency optimal equivalent receiving impedance Zeqr at the two ends of the receiving coil; one end of the efficiency regulation receiving network is connected with the receiving coil, and the other end of the efficiency regulation receiving network is connected with the load. According to the transmission device disclosed by the invention, the transmission energy is not absorbed by the surrounding substances on the non-resonant frequency points, so that the transmission device has good transmission efficiency; moreover, the transmission device is applied to the power source with the load and output load in any sizes, and can keep the highest and optimal transmission efficiency at any distances.
Owner:SOUTHEAST UNIV

Gas diffusion layer for proton exchanging film fuel cell and its preparing method

This invention relates to a gas diffusion layer used in proton exchange film fuel cells and its preparation method, in which, the gas diffusion layer includes a multihole supporting layer and a microhole layer, the multihole supporting layer is a net and porous structure, the microhole layer is composited on the surface of the porous supporting layer closing to the catalyzed layer and covers the surface of the large hole and fiber dense region of the supporting layer uniformly but not penerates into the inside of the supporting layer, which applies a drying method to prepare a gas diffusion layer used in proton exchange membrane fuel cells, and polymr 1 and 2 containing FI is either a same kind or different, and the hydrophile / hydrophobic degree of the two layers is adjustable, so the gas diffusion layer structure is matched with the running condition of the fuel cell and discharges water more easily.
Owner:SUNRISE POWER CO LTD

Petroleum hydrocarbon cracking carbon nine cut fraction hydrogenation technology

This invention relates to a craft of hydrogenation of petroleum alkanes schizolysis carbon nine fraction of distillate, and it applies the craft of the combination of pressure thermal polymerization and finestill. Some of the carbon nine is conducted pressure thermal polymerization, while the other is conducted negative pressure finestill. The hydrogenation is conducted on flash evaporation oil which is from pressure thermal polymerization and finestill carbon nine which is from negative pressure finestill. This craft can inprove the carbon nine distill proportion and cut down the amount of colloid of schizolysis carbon nine, which make the schizolysis carbon nine product after hydrogenation colorless and none stimulant smell.
Owner:广东省茂名华粤集团有限公司 +2

Medium resonator antenna with reconfigurable directional diagram and phased array thereof

The invention relates to a medium resonator antenna with a reconfigurable directional diagram, and a phased array thereof, which belong to the technical field of antennas. The radiator of the medium resonator antenna with the reconfigurable directional diagram comprises two monopole antennas capable of working independently, one metal baffle and a high-dielectric constant medium hemisphere covered on the baffle; and a feeding structure adopts a coaxial feed microstrip circuit and a PIN switching diode to realize the simultaneous input of a DC PIN switch control signal and a radio frequency signal and the switching of the working states of the monopole antennas. The phased array of the antenna is a linear phased array consisting of a plurality of the medium resonator antennas with the reconfigurable directional diagrams as antenna units. The medium resonator antenna with the reconfigurable directional diagram has the characteristics of adjustable radiation directional diagram and working frequency; and the phased array of the antenna has the characteristics of the adjustable radiation directional diagram and working frequency, can realize beam scanning in a lager angle and reduce the sidelobe level of a scanning directional diagram, and the gain of the scanning directional diagram is basically unchanged with the increasing of a scanning angle.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA

Preparation method for three-dimensional ordered stephanoporate chitosan bone renovating bracket material

The invention discloses a method for preparing three-dimensionally sequentially porous chitosan bone repair scaffold material. The method comprises the steps of dissolving chitosan powder in dilute acetic acid and standing to defoam; coating the prepared chitosan solution on the surface of a mold evenly, placing in a solidification solution at room temperature to solid and form a membrane, demoulding and obtaining a chitosan membrane moulding plate; pouring the prepared chitosan solution into the chitosan membrane moulding plate, sealing and soaking in the solidification solution to solid and demould to obtain chitosan gel; and washing the chitosan gel to be neutral by distilled water and drying. The method is simple in preparation technology; the three-dimensionally sequentially porous chitosan bone repair scaffold material prepared is good in regularity and high in strength and porosity, and can meet the requirements of tissue engineering scaffold material.
Owner:ZHEJIANG UNIV

High power LED phase transition heat sink structure

The invention discloses a high-power LED phase-change heat sink structure, the heat sink body of the structure is a circular or square structure with an cavity, a boiling structure and a low temperature boiling heat transfer working medium are arranged in the cavity, a sealing end cover is arranged at the upper end of the heat sink body and tightly connected with the heat sink body, thus forming the closed cavity, the inner surface of the sealing end cover is a condensation structure, and the cavity is sealed into the vacuum state; at least one high-power LED chip is fixed at the lower end of the outside of the heat sink body, an electrode is arranged outside of the phase-change heat sink, the phase-change heat sink, the electrode and a lens are connected by packaging resin, and the high-power LED chip is directly connected with the electrode by a gold wire. The high-power LED phase-change heat sink structure utilizes the liquid-gas phase change of the working medium to realize the isothermal effect of the heat sink body to reduce the temperature difference at upper and lower ends of the heat sink, thus effectively conducting the generated heat of the high-power LED chip out, realizing the integration of the high-power LED and a high-efficiency heat radiating device and having the advantages of light weight, high power, simple structure, high heat radiation efficiency, long service life and no consumption of additional energy, etc.
Owner:SOUTH CHINA UNIV OF TECH

Electrostatic protection method and circuit having detection control circuit

The present invention discloses an electrostatic protection method with detection control circuit and circuit which belongs to electrostatic protection field, and the method comprises the following steps: detect input voltage on input / output terminal of a chip internal circuit through a detection circuit, when input voltage smaller than trigger voltage set by the detection circuit, it is judged to be working voltage, and working current corresponding to the working voltage flows into the chip internal circuit through input / out terminal of the chip internal circuit directly, and the trigger voltage is smaller than minimum breakdown voltage of the chip internal circuit; when input voltage on input / output terminal of a chip internal circuit is detected bigger than or equal to the trigger voltage, it is judged to be electrostatic discharge voltage, and the detection circuit controls electrostatic discharge current corresponding to the electrostatic discharge voltage bleed through a bleeder circuit, thereby the input voltage is clamped in safe voltage range and plays the role of internal circuit protection. The present invention realizes clamp or normal work through detecting input voltage and control bleed.
Owner:SHENZHEN SUNMOON MICROELECTRONICS

Adjustable LED lamp dispensing device

The invention discloses an adjustable LED lamp dispensing device. The adjustable LED lamp dispensing device comprises a workbench, a vertical plate, a glue cylinder and a clamping mechanism. The workbench is perpendicular to the vertical plate. A movable frame is arranged at the center position of the vertical plate. A rotary cylinder is mounted on the movable frame. The rotary cylinder is rotationally connected with the movable frame. A limiting bolt capable of preventing the rotary cylinder from rotating is arranged on the movable frame. The glue cylinder is embedded into the center position of the rotary cylinder. Lead screw sleeves are fixedly arranged at the center positions of the two outer side faces of the movable frame. The periphery of a lead screw is sleeved with the corresponding lead screw sleeve. Each lead screw is provided with a motor for driving the lead screw to rotate. The clamping mechanism is arranged on the workbench. The clamping mechanism comprises extending-and-contracting devices, sliding seats, fixing plates, push-pull rods and clamping plates, all of which are correspondingly arranged in a left-right symmetrical manner. By the adoption of the dispensing device, the angle and height of the glue cylinder can be adjusted conveniently, and the universality of the device is improved; and meanwhile a clamping device convenient and fast to operate is arranged, and the work efficiency is improved.
Owner:XIAMEN LONGSTAR LIGHTING

Preparation method and application of composite probiotics fermentation Chinese medicinal herb composite feed additive

The invention discloses a probiotics fermentation Chinese medicinal herb composite feed additive used for preventing and treating diarrhea of delivery room suckling piglets and weaning conservation piglets. According to laboratory repeated fermentation experiments and actual using effect of products at a plurality of scaled pig farms, a screened and determined formula is as follows: bacillus cereus inoculum size 2-4%, bacillus subtilis inoculum size 2-4%, Chinese medicinal herb inventory 8-20% (main ingredients of which are the root of Chinese pulsatilla, myrobalan, liquorice and schisandra chinensis), and performing liquid state fermentation and then drying. The probiotics fermentation Chinese medicinal herb composite feed additive used for preventing and treating diarrhea of delivery room suckling piglets and weaning conservation piglets can effectively resolve the problem of piglet diarrhea during scaled pig farming process, effectively improve organism immunity and disease resistance capability of piglets, adjust animal enteric micro-ecology balance and repair intestine mucosa damage, and has the effects of improving weaning piglet daily gain by 6%-12% and feed use ratio by 10%-15% and lowering diarrhea rate by 25%-35%. The probiotics fermentation Chinese medicinal herb composite feed additive used for preventing and treating diarrhea of delivery room suckling piglets and weaning conservation piglets is an ideal green environment-friendly safe and novel feed addictive for replacing antibiotic medicines in diarrhea controlling.
Owner:漳州大北农农牧科技有限公司

Light diffusion materials and preparation method thereof

The invention belongs to the technical field of materials and chemistry and provides light diffusion materials. The light diffusion materials comprise light diffusion particles and light-passing materials. The light diffusion particles are multihole light diffusion particles or hollow light diffusion particles or a mixture of the hollow light diffusion particles and the substance light diffusion particles. The light diffusion particles account for 0.1%-25% by weight of the light diffusion materials. The light diffusion materials have high light transmittance and high harizonae. The invention also provides a preparation method of the light diffusion materials.
Owner:SHENZHEN UNIV

Base-adjustable fixture for elongated workpiece with outer contour needing to be milled

A base-adjustable fixture for an elongated workpiece with the outer contour needing to be milled comprises a base, movable portal devices, a positioning device and a control system. A transverse guide rail is mounted at each of the upper and lower edges of the base, and limiting devices for limiting a workblank are arranged on the upper surface of the base at intervals according to the shape of the outer contour of the workblank needing to be machined. Movement of a portal frame structure of each movable portal device along the transverse guide rails is controlled by a portal frame cylinder. The positioning device comprises a press-down positioning device and a plurality of rotatable angle positioning devices, wherein the press-down positioning device is used for pressing down the middle of the workblank, and the rotatable angle positioning devices are used for pressing down the outer contour of the workblank. The control system controls the movable portal devices to move according to machining movement trails of a cutter and controls single or multiple positioning device bodies in the positioning device to loosen to make way for a cutter path. The base-adjustable fixture for the elongated workpiece with the outer contour needing to be milled has the advantages that deformation of the elongated workpiece during machining is avoided, machining efficiency is improved, the positioning device can be controlled to make way for the machining path of the cutter, operation safety is improved and machining precision is high.
Owner:江苏普拉迪数控科技有限公司

Annular supersonic velocity spray pipe and design method thereof

The invention provides an annular supersonic velocity spray pipe and a design method thereof. The design method for the annular supersonic velocity spray pipe comprises the following steps of: predicting a flow field parameter in a transonic velocity segment area, and extracting an initial characteristic line from the flow field parameter; determining the mach number distribution of a supersonic velocity upright wall of the spray pipe according to design requirements; and determining a supersonic velocity curved wall molded surface of the spray pipe by a characteristic line method according to the initial characteristic line and the mach number distribution of the supersonic velocity upright wall. According to the design method for the annular supersonic velocity spray pipe, compression waves are not concentrated in a flow field of the designed annular supersonic velocity spray pipe, the distribution of the flow field parameter can be optimized according to actual application, and thequality of the flow field of the annular supersonic velocity spray pipe can be greatly improved. According to the annular supersonic velocity spray pipe, the design method for the annular supersonic velocity spray pipe is utilized.
Owner:NAT UNIV OF DEFENSE TECH

Nano-porous high-entropy alloy and preparation method thereof

ActiveCN110484764AImprove electrochemical durabilityEasy to prepareHigh entropy alloysSynthesis methods
The invention relates to the field of high-entropy alloy materials, and provides a non-noble metal nano-porous high-entropy alloy and a preparation method thereof. The element composition of the nano-porous high-entropy alloy is AlNiCoFeX, wherein X is one or more of Mo, Cu, Mn, Cr, V, Zr and Nb; the nano-porous high-entropy alloy is of a layered nano porous structure and is provided with a macro-hole channel layer and a thin-wall layer; the macro-hole channel layer comprises first nano-pores; the thin-wall layer comprises second nano-pores; and the size of the first nano-pores is 20-30 timesthat of the second nano-pores. The preparation method of the non-noble metal nano-porous high-entropy alloy is simple; and the highly-controllable top-to-bottom synthesis method is developed by combining traditional metallurgy, rapid cooling and dealloying, the overall synthesis concept is ingenious, and the requirements for high-precision control over the process and the high technical level of operators are reduced.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL

Graphene compounded wave absorbing material and preparation method thereof

The invention relates to the technical field of microwave absorption and particularly relates to a graphene compounded wave absorbing material and a preparation method thereof. The graphene compounded wave absorbing material is prepared through uniformly compounding carbonyl iron and graphene. The preparation method comprises the steps: firstly, preparing graphite oxide by using an improved Hummers method, and then, uniformly dispersing the graphite oxide into a carbonyl iron dispersion solution; then, reducing the graphite oxide to graphene by using an ultrasonic reduction method, thereby preparing the graphene compounded wave absorbing material. Compared with the pure carbonyl iron and the pure graphene, the compounded wave absorbing material provided by the invention has the advantages that the wave absorbing performance is superior, the wave absorbing strength is high, the frequency band of wave absorbing is wide, and the density is relatively low; the compounded wave absorbing material has adjustability, high absorption at different frequencies is achieved through adjusting the mass ratio of the graphene to the carbonyl iron and the thickness of the compounded material.
Owner:INST OF DONGGUAN TONGJI UNIV +1

Graphene-based ternary composite wave-absorbing material and preparation method thereof

The invention relates to the technical field of microwave absorption, in particular to a graphene-based ternary composite wave-absorbing material and a preparation method thereof. The preparation method comprises the steps of firstly, preparing silicon dioxide-coated carbonyl iron core-shell composite particles by using a sol-gel method, then preparing graphite oxide by using an improved Hummers method, evenly dispersing the graphite oxide into dispersion liquid of the silicon dioxide-coated carbonyl iron core-shell composite particles, and finally, using an ultrasonic reduction method to enable graphite oxide to be reduced into graphene so as to prepare the graphene-based ternary composite wave-absorbing material. The preparation method provided by the invention is simple and efficient; the prepared composite wave-absorbing material is more excellent in wave absorbing performance, high in wave absorbing strength, wide in wave absorbing bandwidth and smaller in density compared with a pure carbonyl iron binary composite wave-absorbing material and a pure graphene and carbonyl iron or graphene binary composite wave-absorbing material; the graphene-based ternary composite wave-absorbing material also has regulation performance, and can realize strong wave absorption under different frequencies by adjusting the thickness of a coating layer SiO2, the mass ratio of graphene to the coated core-shell composite particles and the thickness of the ternary composite material.
Owner:INST OF DONGGUAN TONGJI UNIV +1

Mushroom bed feeder

The invention provides a mushroom bed feeder, belongs to the technical field of machinery, and solves the problems of low work efficiency as a forklift and manual operation need to be matched when the existing mushroom bed is used for feeding. The mushroom bed feeder comprises a moving frame, a worktable arranged above the moving frame and a lifting mechanism arranged between the moving frame and the worktable for driving the worktable to lift; a conveyor belt is arranged on the worktable; a feeding hopper and a poking flattening unit, which are positioned above the conveyor belt, are sequentially arranged on the worktable along the conveying direction of the conveyor belt; a swing head for supporting the conveyor belt and a support structure for supporting the swing head are arranged at the front part of the worktable; an adjusting structure for adjusting the horizontal distance, relative to the worktable, of the swing head is also arranged on the worktable. The mushroom feeder has the advantages of good feeding effect, high feeding efficiency, broad feeding range and the like.
Owner:ZHEJIANG HONGYE EQUIP TECH

Auxiliary wheel mechanism of double-body vehicle

The invention provides an auxiliary wheel mechanism of a double-body vehicle, belonging to the field of mechanical technology. The auxiliary wheel mechanism solves the technical problems that the existing single-body vehicle has poorer balance and stability when in low speed, etc. The auxiliary wheel mechanism of the double-body vehicle is arranged at the lower part of bodyworks of single-body vehicles, and the double-body vehicle is formed by combining the left single-body vehicle and the right single-body vehicle which can run independently. The auxiliary wheel mechanism comprises a wheel carrier and two auxiliary wheels, wherein the two auxiliary wheels are arranged on the wheel carrier and respectively positioned at the two sides of rear wheels of the single-body vehicles; and liftingdrive structure which is used for driving the wheel carrier to lift correspondingly to the bodyworks of the single-body vehicles is arranged between the bodyworks of the single-body vehicles and the wheel carrier. The auxiliary wheel mechanism can improve the stability and the balance of the single-body vehicles in the double-body vehicle, has simpler structure and low production cost, can automatically control the auxiliary wheels to be lifted up and down along with the change of vehicle speed, and has intelligence and adjustability.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1

Semi-quantitative risk analysis method for gas pipeline industry based on risk matrix

A semi-quantitative risk analysis method for the gas pipeline industry based on a risk matrix includes the following steps: (1) determining accident probability grades of the risk matrix; (2) determining seriousness grades for personal loss consequences of accidents; (3) determining seriousness grades for environmental loss consequences of the accidents; (4) determining seriousness grades for property loss consequences of the accidents; (5) determining seriousness grades for reputation effect consequences of the accidents; (6) determining accident consequence seriousness grades of the risk matrix; (7) determining accident scenario risk grades; (8) achieving corresponding functions of the risk matrix through relevant software. The semi-quantitative risk analysis method provided by the invention includes five sub-modules: an information acquisition and input module, an accident probability module, an accident consequence seriousness module, a risk grade judging module, and a risk result output module; each sub-module is provided with specific and detailed computation and assessment methods, so that accident scenario risks can be specifically and strictly defined.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Preparation method of material with nitric oxide (NO) catalytic activity

The invention discloses a preparation method of a material with nitric oxide (NO) catalytic activity. The preparation method is implemented through the steps that a selenium-containing compound with nitric oxide catalytic activity, a sulfur-containing compound, a soluble copper salt, a compound with an o-phenol structure, a flavonoid compound, and a flavonol compound or a flavanone compound are mixed in a buffer solution and then polymerized. The material with NO catalytic activity not only can be applied to the surface modification of materials which are different in material, geometrical shape and topological structure, and also can be used as a filling material for a controlled release system. Double selenium bonds, double sulfur bonds, copper ions and phenolic hydroxyl groups, which are contained in the prepared material with nitric oxide (NO) catalytic activity, have an excellent free radical removal function; the selenium bonds, the sulfur bonds and the chelate copper ions, which are contained in the material, also have a reduced glutathione (GSH) response function; in addition, the copper ions containing in the material also have an antibacterial function; and the material, besides being used for catalyzing NO release, also can be applied to all related fields of free radical removal and GSH response function.
Owner:GUANGZHOU NANCHUANG EVEREST MEDICAL TECH CO LTD

Intelligent film filter

The intelligent film filter includes a multi-layer film filter and a electric controller. The multi-layer film filter has Fabry-Perot Etalon structure and consists of one middle interval layer and multi-layer high-reflectivity films on two sides, one side is one H(LH)p-1 film system and the other is one (HL)p-1H film system, and the middle interval layer includes one dielectric film layer in the thickness of one half transmissive wavelength. The dielectric film layer is made of piezoelectric material or other thickness controllable optical material. The electric controller is used to receive and analyze the outgoing light signal and to control the optical thickness of the middle interval layer autoamtically and lock and the filter in the preset central transmissive wavelength.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1

Method for adjusting nitrogen content in carbon-nitrogen based monatomic ferrous catalyst

ActiveCN107180972AEffective regulation of contentEffective regulation of nitrogen contentCell electrodesOrganic solventCentrifugation
The invention discloses a method for adjusting nitrogen content in carbon-nitrogen based monatomic ferrous catalyst. The carbon-nitrogen based monatomic ferrous catalyst with adjustable nitrogen content is prepared by taking different types of N-containing organic molecules as C / N sources and ferric salt as Fe source; dispersing the N-containing organic molecules and ferric salt in organic solvent; stirring the mixture to make it react; after finishing the reaction, removing solvent and drying components; performing high-temperature pyrolysis on the obtained mixture under the nitrogen atmosphere ( 700-1000 DEG C); performing acidification, centrifugation, washing, drying and other processes on the product; performing the secondary high-temperature pyrolysis on the product to obtain the catalyst. The invention provides a simple and effective preparation method of carbon-nitrogen based monatomic ferrous catalyst with adjustable nitrogen content; the preparation method is simple and economical, and applicable to the industrial large-scale production.
Owner:NANJING NORMAL UNIVERSITY

Slow release urea containing gamma-polyglutamic acid and urease inhibitor and preparation method thereof

The invention discloses slow release urea containing gamma-polyglutamic acid and a urease inhibitor. The slow release urea is obtained by spraying a coated slow release solution onto the outer surface of urea particles and drying, wherein the coated slow release solution contains gamma-polyglutamic acid and a urease inhibitor. The invention further discloses a preparation method of the slow release urea. The gamma-polyglutamic acid and the urease inhibitor in the slow release urea have synergic actions, and the gamma-polyglutamic acid can form a layer of protective film on the surfaces of a fertilizer and the urease inhibitor, so that the utilization ratio of the fertilizer is increased, and environmental pollution is lowered.
Owner:NANJING SHINEKING BIOTECH CO LTD +1

Gamma-polyglutamic acid and naphthylacetic acid combined type rooting agent and using method thereof

The invention discloses a gamma-polyglutamic acid and naphthylacetic acid combined type rooting agent, which contains pure biological fermentation active components including gamma-polyglutamic acid, naphthylacetic acid, indolebutyric acid, MgSO4, HBO3, Na2MoO4 and the like. The invention further discloses a using method of the rooting agent. The rooting agent has high active biological functions, wherein the gamma-polyglutamic acid and the naphthylacetic acid respectively have synergetic effects. The gamma-polyglutamic acid and naphthylacetic acid combined type rooting agent can accelerate the plant root cell division speed, promote rootage and root enhancing and improve absorbing capacity of root systems to nutrition, and is suitable for transplantation of vegetable seedlings including tomatoes, green vegetables, cucumbers, hot peppers, rapes and the like and cottage or transplantation of woody trees and flowers and plants which are difficult in rootage.
Owner:NANJING SHINEKING BIOTECH CO LTD

Electrochromic privacy film and preparation method thereof

The invention relates to the technical field of optical protection film, especially to an electrochromic privacy film and its preparation method. The electrochromic privacy film comprises a film protection layer, a first adhesive layer, a hardening layer, a first main film layer, a shutter layer, a second main film layer, a second adhesive layer and a stripping layer which are successively arranged from top to bottom. An electrode is connected between the upper surface and the lower surface of the shutter layer. The electrochromic privacy film has high light transmittance and adjustability of the privacy function. In an easy-peeping environment, by starting an electrode switch, the protective film can undergo electrochromism to have the privacy function. In a safe environment, by shutting the electrode, the privacy function can be cancelled.
Owner:NALI OPTICAL MATERIAL DONGGUAN

Cleaning robot capable of automatically adapting to pipeline inner diameter

The invention relates to a cleaning robot capable of automatically adapting to a pipeline inner diameter. The cleaning robot comprises a central rack body, an ultrasonic device, a cleaning device, a control device and a plurality of roller devices which roll along the inner wall of a pipeline, wherein the roller devices are uniformly arranged on the central rack body in the peripheral direction; the ultrasonic device is mounted at the front end of the central rack body; the cleaning device is mounted at the rear end of the central rack body; and the ultrasonic device, the cleaning device and the roller devices are in signal connection with the control device. The cleaning robot can automatically adapt to the changes of the pipeline inner diameter and can realize a turning function, and belongs to the technical field of the cleaning robots.
Owner:GUANGZHOU UNIVERSITY

Porous bioglass/chitosan/silk fibroin composite material and preparation method thereof

The invention provides a porous bioglass / chitosan / silk fibroin composite material and its preparation method. The porous bioglass / chitosan / silk fibroin composite material is characterized in that a silk fibroin scaffold is included; chitosan is combined on the surface of the silk fibroin scaffold; and porous bioglass is combined on the surface of chitosan. The silk fibroin scaffold is used as a substrate and is combined with chitosan and bioglass particulate. Overall biocompatibility and degradation property of the material are guaranteed, and the material has a certain mechanical strength. In addition, each component can give play to its own functions separately, so as to make up performance deficiency of a single material. Thus, the material becomes an excellent tissue engineering material which has good biocompatibility and degradability, has effects of antibiosis and growth-promotion and has a certain mechanical strength.
Owner:DONGHUA UNIV

Anti-oxidation silica carbide pouring material

The present invention relates to an antioxidant silicon arbide pouring material, belonging to the field of refractory material technology. Its composition includes: large crystal silicon carbide granules whose grain size is less than or equal to 7 mm 68-72%, alumina cement 2-12%, silicon carbide matrix whose grain size is less than or equal to 320 meshes 8-10%, alpha-Al2O3 micrpowder whose grain size is less than or equal to 4 micrometers 5-6 %, SiO2 micropowder whose grain size ia less than or equal to 1 micrometer 4-5 % and boric acid 0.1-0.3% and composite antioxidant 1-2%. Said pouring material raises resistance to oxidation, reduces porosity, raises resistance to slag corrosion, can make its service time have adjustability, and can improve furnace adaptability, and can raise the service life of incinerator.
Owner:宜兴天霸非金属材料有限公司
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