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Free multi-vision angle, real-time three-dimensional reconstruction system and method
InactiveCN101320473ALighting no special requirementsExperimental environment requirements are lowImage analysis3D modellingFree rotationImage segmentation
The present invention relates to a free multi-view real time three-dimension reconstructing system and a method thereof. The system consists of a CCD vidicon, a computer assembled with a multi-channel image collecting card and a plane demarcating template. Two concentric circles and eight tangential paths with prolonged lines crossing the circle center are drawn on the center of the plane demarcating template and are used for demarcating the vidicon parameter. In the technical proposal of the present invention, a reconstructing object is fixed at the center of the demarcating template; the template is held by hand to drive the reconstructing object to rotate freely within the range of the view and the depth of field of a vidicon at a fixed position; image collection and object reconstruction are processed synchronously, thereby being capable of finding concentrated missed view in time and displaying reconstruction result in real time. The three-dimension reconstructing method comprises the steps of image segmentation, full-automatic vidicon demarcation and the three-dimension reconstruction of object shape, etc. The three-dimension reconstructing system of the present invention is based on the computer vision technology, and the reconstructing method is based on the profile recovery shape and can realize free multi-view real time three-dimension reconstruction.
Owner:SHANGHAI UNIV
Full-spectrum super-resolution measuring method and label-free biomolecule measurement system
ActiveCN103134436AFew stepsLower barriers to useUsing optical meansColor/spectral properties measurementsReflectance spectroscopyLighting spectrum
The invention relates to a full-spectrum super-resolution measuring method and a label-free biomolecule measurement system. The method and the system are characterized in that membrane layers with different thicknesses ranging from 300nm to 4500nm are arranged on a chip and used for encoding, then sample application is carried out on the chip by means of probe protein to form a biological chip, the probe protein of the biological chip is fully combined with a to-be-tested sample, a to-be-tested object in the to-be-tested sample is arranged on the probe protein through specific adsorption, light beams with light intensity of I0 are vertically cast on the biological chip, when the light beams are vertically cast on the biological chip only covered with the membrane layers, different reflection spectrums are produced due to the different thicknesses of the membrane layers, thickness encoding of the biological chip is achieved, by means of an interference extremum method, the thicknesses t of the membrane layers of the biological chip are decoded according to wavelengths of extreme points in a light spectrum, when the light beams are cast on the to-be-tested object combined with the probe protein, thickness changes of the membrane layers in the range delta occur, intensity amplitude differences are obtained through calculation, and the thickness of the to-be-tested object is obtained. The method and the system can be widely used in thickness measurement of biomolecules.
Owner:CAPITALBIO CORP +1
Molybdenum disulfide nano sheet and preparation method thereof
ActiveCN104418387AAvoid safety hazardsOvercoming the inability to accurately control the introduction of sulfur sourcesNanotechnologyMolybdenum sulfidesGas phaseReaction temperature
The invention relates to a molybdenum disulfide nano sheet and a preparation method thereof. In inert atmosphere, sulfur source and molybdenum source enable steam contact and chemical vapor deposition, vertical molybdenum disulfide nano sheet can be formed on a substrate; the reaction condition for chemical vapor deposition is characterized in that the reaction temperature is 690-750 DEG C, and reaction time is 5-60 minutes. The molybdenum disulfide nano sheet has the advantages of special morphology and uniform size, most part of the molybdenum disulfide nano sheet is single layer, uniform growth in large area can be realized, the size is 0.3-2mum, and the thickness of molybdenum disulfide nano sheet is less than 1nm. Compared with a traditional preparation method of molybdenum disulfide sheet layer, the method of the invention has the advantages of simple technology, convenient operation, easy realization of large scale production, and low requirement on experiment environment; carbon disulfide is used for replacing a traditional solid phase or gas phase sulfur source, so that defects of difficult control of sulfur source introduction and cut-off time point by the solid state sulfur source can be overcome, and hidden trouble for usage of inflammable and explosive gaseous state sulfur source can be simultaneously avoided.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Method and device for detecting pressure of laser shock wave
InactiveCN102519642AAddressing the drawbacks of impact damageSimple structureApparatus for force/torque/work measurementShock waveMomentum
The invention relates to the field of measuring the mechanics parameter of laser shock, in particular to a method and a device for measuring the laser shock force by use of a pendulum bob. In the invention, the magnitude of the laser shock force is calculated according to the swinging angle of the pendulum bob after the pendulum bob is shocked by laser and the acting time of the laser shock based on the momentum theorem and the conservation law of mechanical energy. The method and device provided by the invention are based on the momentum theorem and the conservation law of mechanical energy, and thus the measurement principle is clear; and the equipment measuring the shock force by use of the pendulum bob has a simple structure and low cost, and is convenient to operate.
Owner:JIANGSU UNIV
Preparation method of field-induced nonlinear conducting composite material, composite material prepared and application thereof
ActiveCN109370155ASimple processSimple and fast operationPlastic/resin/waxes insulatorsEpoxyOvervoltage
The invention discloses a preparation method of a field-induced nonlinear conducting composite material, a prepared composite material and an application thereof and relates to the field of nonlinearconducting composite materials. The preparation method comprises the following steps: taking KH560, ethanol and deionized water to obtain a solution A; adding GO into the solution A to react for 3-5 hours at 75-85 DEG C to obtain a suspension B; adding alkali into the suspension B till the pH is 10, adding hydrazine hydrate to be dispersed, heating the mixture to 85-95 DEG C to react for 5-7 hoursto obtain a suspension C, washing, suction filtering and drying the filter cake to obtain RKGO powder; mixing the RKGO powder, epoxy resin E-51 and acetone to obtain a suspension D, carrying out a reaction at 75-85 DEG C till the acetone is volatilized fully and cooled to 45-50 DEG C, adding a 2-ethyl-4-methylimidazole liquid to react, and extracting bubbles to be cured to obtain a composite material, wherein the RKGO filling mass fraction in the composite material is 0.75-1.50%. The preparation method is simple, low in cost, short in reaction time and easy to prepare massively. The preparedcomposite material is light in weight, good in uniformity and high in conducting nonlinear coefficient, and can be used in the fields of overvoltage protection, lightning stroke and surge protection,static prevention and self-adaptive electromagnetic pulse protection.
Owner:ARMY ENG UNIV OF PLA
Preparation method of antimony selenide thin-film solar cell
ActiveCN110416356AImprove photoelectric conversion efficiencyShort timeFinal product manufacturePhotovoltaic energy generationTin dioxideEvaporation
The invention discloses a preparation method of an antimony selenide thin-film solar cell. The method comprises the steps: preparing a tin dioxide hydrocolloid dispersion liquid and a cadmium chlorideaqueous solution according to a certain mass ratio; sequentially preparing a tin dioxide electron transport layer and a cadmium chloride modification layer on clean patterned ITO conductive glass through a spin coating method, and performing drying and thermal treatment to obtain a substrate; putting antimony selenide powder and the substrate into a quartz tube, putting the quartz tube into an atmosphere furnace, performing vacuum pumping of the cavity, performing heating and heat preservation, opening an upper cover of the atmosphere furnace immediately after heat preservation is completed so that the cavity is rapidly cooled to the room temperature, taking out the substrate, and completing film deposition to obtain an antimony selenide film; finally, evaporating a layer of gold on the surface of the antimony selenide film through a vacuum thermal evaporation method to serve as a battery electrode, and obtaining an antimony selenide film solar cell. The method has the advantages that(1) the cadmium chloride solution is spin-coated to form the film as a modification layer, so a high-efficiency battery device is obtained; (2) the operation is simple, the thin film preparation process consumes less time, the efficiency is high, the requirement on the experimental environment is low, and the prepared battery device has stable performance.
Owner:XI AN JIAOTONG UNIV
Method for directly growing Prussian-blue film on FTO conductive glass
The invention discloses a method for directly growing a Prussian-blue film on FTO conductive glass. The method includes: mixing potassium ferricyanide, reducing agent, concentrated hydrochloric acid and deionized water, transferring into a hydrothermal reaction kettle, placing a piece of FTO conductive glass into the hydrothermal reaction kettle, allowing the conductive face of the conductive glass to face downwardly, performing constant-temperature hydrothermal reaction at 100-120 DEG C for a certain period of time, and naturally cooling to room temperature after the reaction, wherein the reducing agent is optionally selected from glucose, oxalic acid or polyvinyl pyrrolidone; taking out the FTO conductive glass in the reaction kettle, washing with the deionized water, and blowing with a blower for drying to obtain the Prussian-blue film. The Prussian-blue film prepared by the method is good in electrochromic effect.
Owner:SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Porous carbonate and porous oxide preparation methods
ActiveCN103539121ANo damageZero emissionOxide/hydroxide preparationZinc oxides/hydroxidesFiltrationHigh pressure
The invention relates to porous carbonate and porous oxide preparation methods. Crystal water-containing salts of same or different metal ions which can form carbonate precipitates are selected, the crystal water-containing salts are added with a precipitator and a pore-forming agent, the mixed raw materials are mixed uniformly and then are grinded at a room temperature for 5-600min, the grinded raw materials are taken out and then is stood for 0.5-24h, the stood raw materials are taken out and then are subjected to suction filtration, the filtration product is washed by a washing agent so that the pore-forming agent is removed, and the washed product is dried to form a porous carbonate; and the porous carbonate is calcined to form a porous oxide. The porous carbonate and porous oxide preparation methods are green and environmentally friendly, can be carried out at a room temperature under normal pressure, are free of high temperature and high pressure conditions and have an obviously reduced cost.
Owner:SHANDONG UNIV
Apparatus and method to prepare methane hydrates under normal pressure
PendingCN109735374AFast preparationSimple and fast operationGaseous fuelsProcess engineeringRepeatability
The invention discloses an apparatus to prepare methane hydrates under normal pressure. The apparatus comprises: a foaming unit for generating foam; a liquid supply unit for providing a low-temperature methane liquid; a reactor unit having the upper end communicated with the foaming unit and the lower end communicated with the liquid supply unit, and used for generating methane hydrates; a data acquisition unit for acquiring interior temperature and resistivity of the reactor unit. The apparatus herein has the advantages that the low-temperature methane liquid is introduced into a storage tankunder the normal pressure and low temperature, high-ratio foam liquid is generated via the foaming device, and methane hydrates are generated during the process where the low-temperature methane vapor moves up and gains contact with the foam to give rise to heat and mass transfer; the whole experimental process is simple to perform, has low experimental environment requirements, is suitable for quick preparation of methane hydrates under normal pressure, and has the advantages of low time consumption, low cost, and high experimental repeatability.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Metal foil numerical control cutting and gluing direct forming additive manufacturing equipment and method
ActiveCN111843184ANo need to meltAvoid heat cracksAdditive manufacturing apparatusLiquid surface applicatorsNumerical controlRobot hand
The invention discloses metal foil numerical control cutting and gluing direct forming additive manufacturing equipment and method. The equipment comprises a conveying belt, the conveying belt passesthrough a laser cutting machine, a digital programming route is arranged in the laser cutting machine, and a computer is combined with manipulators to complete a cutting station. A final workpiece issliced, programmed and digitally cut in advance, a special-shaped metal foil for additive manufacturing slicing is obtained, separation of waste and the metal special-shaped foil is completed throughsuction cups, and finally stacking operation of metal structural part is completed through gluing. Circular operation is carried out until a workpiece blank with a designed shape is obtained, and additive manufacturing is realized through curing. According to the method, the ultra-soft characteristic of the metal foil is utilized, and the metal structural part with the complex shape is stacked through layer-by-layer gluing under the cooperation of a mold. Compared with traditional additive manufacturing, the method has the advantages that the machining process is greatly shortened, and the cost is greatly reduced by using the metal foil with lower price. All waste materials are recycled in the whole manufacturing process, melting point temperature reaching and long-time heating forming arenot needed, energy is saved, and meanwhile pollution is reduced.
Owner:SHENYANG AEROSPACE UNIVERSITY
Test platform capable of providing low temperature environment
ActiveCN108827592AHigh transparencyEasy to observe in real timeHydrodynamic testingIce waterPropeller
The invention relates to a test platform capable of providing a low temperature environment, and belongs to the technical field of pool test. The test platform comprises a support, a toughened glass framework, an ice pushing device and a refrigeration system. The support is composed of an inner support and an outer support, and has the advantages including rapid installation and low cost. Use of the toughened glass provides convenience for video-recording and shooting of a test process. The ice pushing device can install U-shaped plates of different widths, lengths and heights according to different test requirements. A pneumatic set and a refrigerating set are used to provide the stable low-temperature environment for the test platform, ice thawing and change of mechanical properties canbe prevented effectively, and the ice state can approach the practical condition more. The test platform can be used for cutting and collision test of propeller and ice as well as collision test of ice and other structured objects, and water can be added into the toughened glass to make a ice-water-structured object test research, and thus, application range of the test platform is wider.
Owner:HARBIN ENG UNIV
Method for cutting two-phase composite through ultrafast laser
ActiveCN108817699ASmall heat affected zoneStructural continuityWelding/soldering/cutting articlesLaser beam welding apparatusFine structureTwo phase composite
The invention provides a method for cutting a two-phase composite through an ultrafast laser. According to the method for cutting the two-phase composite through the ultrafast laser, through finding of the intersection point of incubation effect curves of two different materials in the composite, the cutting speed, wavelength and cutting energy needed by the laser at the intersection point are obtained; the problem that in the prior art, the two-phase common threshold value, capable of meeting two materials, of the composite cutting single-pulse laser in the two-phase component is difficult tofind is solved, and the problem that in the two-phase component, a reinforcement phase or a matrix phase locally falls off, and a fine structure is discontinuous are solved; and the method is simplein process, clear in step and good in reliability.
Owner:BEIJING SATELLITE MFG FACTORY
Method for directly growing tungsten oxide film on conducting glass
InactiveCN106865997AAchieving controllable equipmentGood electrical contactCoatingsNon-linear opticsAlcoholRoom temperature
The invention discloses a method for directly growing a tungsten oxide film on conducting glass. The method disclosed by the invention comprises the following specific steps: firstly mixing tungsten hexachloride, absolute ethyl alcohol, tetrahydrofuran and polyethylene glycol, then transferring to a hydrothermal reaction kettle, putting a piece of FTO conducting glass into the hydrothermal reaction kettle, putting a conducting face downwards, performing constant-temperature hydrothermal reaction for certain time and naturally cooling to room temperature after reaction finishes; taking the FTO conducting glass in the reaction kettle out, washing through absolute ethyl alcohol and putting an obtained film into a muffle furnace to be roasted in certain temperature to obtain a tungsten oxide electrochromism film. The tungsten oxide electrochromism film material prepared through the method disclosed by the invention has even morphology and can be applied to electrochromism and the fields related to the electrochromism.
Owner:SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Method for establishing and analyzing three-dimensional fracture model of polyethylene under complex stress
PendingCN112199879AEasy to operateExperiment operation is simpleDesign optimisation/simulationSpecial data processing applicationsElement modelElement analysis
The invention relates to the field of laboratory material failure analysis and finite element simulation, in particular to a method for establishing and analyzing a three-dimensional fracture model ofpolyethylene under complex stress. The method comprises the following steps: carrying out a uniaxial tensile experiment on the same polyethylene material to obtain an engineering stress displacementexperiment curve; establishing a finite element model, selecting a damage model, and modifying damage model parameters until an engineering stress displacement curve obtained by a uniaxial tensile experiment can be simulated and reproduced, so as to obtain a real stress-strain curve of a tensile sample; and applying the real stress-strain curve to subsequent finite element simulation, and establishing a three-dimensional fracture model of the polyethylene material in a complex stress state by utilizing finite element analysis. The problem that failure analysis methods under complex stress in the prior art are all designed by metal materials and are not suitable for polyethylene materials is solved.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Self-accelerating light generation method and device
ActiveCN112327557AEasy to operateExperimental environment requirements are lowNon-linear opticsLight beamPath generation
The embodiment of the invention provides a self-accelerating light generation method and device, relates to the technical field of light beams, and aims to obtain required self-accelerating light by creating a light field and increasing a linear phase. According to the specific scheme, the method comprises the steps of creating a light field of self-accelerating light; performing Fourier transformon the light field to obtain the amplitude and the initial phase of the self-accelerating light; determining a phase value, the phase value including an initial phase and a linear phase; and loadingthe amplitude and the phase value to a light path generation device to obtain the light source.
Owner:CHINA UNITED NETWORK COMM GRP CO LTD
Preparation method of field-sensitive nonlinear conductive film, prepared film and application
ActiveCN109177011AEvenly distributedGood dispersionFlat articlesCoatingsOvervoltagePolyvinyl alcohol
The invention discloses a preparation method of a field-sensitive nonlinear conductive film, a prepared film and an application and relates to the field of conductive film materials. The preparation method comprises the following steps: stirring polyvinyl alcohol and deionized water at normal temperature, heating to the temperature of 85-95 DEG C, continuously stirring until the polyvinyl alcoholis completely dissolved so as to obtain a solution E; and adding silver nanowire into the solution E, and stirring at the temperature of 60-70 DEG C for 10-15 hours so as to obtain a composite material fluid, performing film casting, and volatilizing the solvent, thereby obtaining the field-sensitive nonlinear conductive film, wherein the polymerization degree of the polyvinyl alcohol is 1700, thealcoholysis degree is 99%, the silver nanowire length is 10-14 microns, the diameter is 80-120nm, and the draw ratio L / r is 80-350; and the AgNWs packed volume fraction in the field-sensitive nonlinear conductive film is 1.05-2.44%. The method is simple in process, low in cost, short in reaction time and capable of realizing large-scale preparation; and the prepared film is uniform in distribution, excellent in dispersion property and aggregation-free, has very obvious nonlinear conductivity, and can be applied to the adaptive protection field of overvoltage protection, lightning surge and electrostatic discharge.
Owner:ARMY ENG UNIV OF PLA
Preparation method for copper substrate for vertical LED (light-emitting diode) chips
ActiveCN104638096ASolve efficiency problemsSolve the problem of longevitySemiconductor devicesCopper platingBiological activation
The invention provides a preparation method for a copper substrate for vertical LED (light-emitting diode) chips, which includes the following steps: (1) a P-type metal electrode layer is deposited on the surface of an epitaxial wafer, a layer of Au is then plated on the P-type metal electrode layer, and thereby a first substrate is obtained; (2) the first substrate is cleaned, and after a degreasing effect is achieved, H2SO4 is used for surface activation; (3) a phosphorized copper anode is blackened, and is then cleaned; (4) the first substrate treated in step 2 and the phosphorized copper anode treated in step 3 are put into copper plating solution and electroplated, so that an electroplated sample is obtained; (5) the electroplated sample is cleaned in order to remove residual copper plating solution, so that the copper substrate is obtained. The preparation method has the characteristics of simple process and low preparation cost, moreover, the copper substrate prepared by the method has the characteristics of no burrs, good surface uniformity, good smoothness, low roughness and good thermal and electric conductivities, and thereby a chip which is prepared by adopting the copper substrate has high light extraction efficiency.
Owner:广州市众拓光电科技有限公司
A method for preparing a field reversible nonlinear conductive composite material, the material prepared by the method and application of the material
ActiveCN110092933AEvenly distributedGood dispersionMaterial nanotechnologyTransportation and packagingOvervoltageAlcohol
The invention relates to the field of conductive composite materials and discloses a method for preparing a field reversible nonlinear conductive composite material, the material prepared by the method and application of the material. The method includes weighing AgNWs, adding the AgNWs into absolute alcohol, adding TGA, stirring the mixture, then adding TBT, fully mixing the mixture, then heatingthe mixture to 180-210 DEG C, reacting the mixture for 9-11 h, performing centrifugation to obtain precipitate, and washing the precipitate to obtain AgNWs@TiO2; weighing PVA and water, stirring themixture, heating the mixture to 85-95 DEG C and stirring the mixture until the PVA is dissolved to obtain a solution G; weighting the AgNWs@TiO2, adding the AgNWs@TiO2 into the solution G, stirring the solution at 60-70 DEG C for 10-15 h to obtain a composite material fluid, and performing casting to form film, then the field reversible nonlinear conductive composite material can be obtained afterthe solvent is volatilized. The mass ratio of the AgNWs, the TGA and the TBT is 100:210-220:20; the degree of polymerization of the PVA is 1750 + / - 50, and the alcoholysis degree is 99%; and the massratio of the PVA to the AgNWs@TiO2 is 60:30-50. The method has characteristics including a simple process, a low cost, short reaction time and easy preparation in a large scale. The prepared composite material is uniform in distribution, good in dispersibility and free of agglomeration, and can be applied in overvoltage protection, lightning stroke surge and self-adaption electromagnetic pulse protection fields.
Owner:ARMY ENG UNIV OF PLA
Method for growing perovskite single crystal by using layer solution method
ActiveCN110195252AImprove crystal qualityHigh crystallinityPolycrystalline material growthFrom normal temperature solutionsSingle crystalNucleation
The invention provides a method for growing a perovskite single crystal by using a layer solution method, and belongs to the technical field of single crystals of perovskite materials. According to the present invention, by adding the frozen layer of a solution A or solution B between the solution A and the solution B, the mixing rate of the solution A layer and the solution B layer can be reduced, and the heat released by the reaction of the two solution layers can be offset by the frozen layer, such that the reaction between the two solution layers is gentle, the crystal nucleation and growth process is stable, and the perovskite single crystal obtained after the standing culture has characteristics of large size, high quality and flat surface; the method has advantages of simple operation, no requirement of precise growth equipment, low requirements on the experimental environment, low cost and wide universality for the single crystal preparation; and the results of the embodimentsshow that the perovskite single crystal obtained by the method can have a length of 0.5-2 cm, and has good crystallinity.
Owner:XIANGTAN UNIV
Manganese-doped cesium-lead-chlorine illuminant based on silicon dioxide coating and preparation method and application thereof
PendingCN113025311AReduce pollutionImprove thermal stabilityMaterial nanotechnologyInksQuantum yieldPhotoluminescence
The invention belongs to the technical field of perovskite quantum dot luminescent materials, and discloses a manganese-doped cesium-lead-chlorine luminophor based on silicon dioxide coating, and a preparation method and an application thereof The preparation method comprises the following steps: preparing a Mn<2+> doped CsPbCl3 quantum dot solution through an improved thermal injection method, taking the quantum dot as a precursor, adding triethoxysilane, tetramethoxysilane and tetraethoxysilane, and fully reacting under stirring; and carrying out washing, centrifugation and vacuum drying on the reaction product to obtain the luminous body. The synthetic process is simple, the cost is low, the requirements on experimental equipment and experimental environment are low, and the environmental pollution is low. By doping Mn, the stability and the photoluminescence quantum yield of CsPbCl3 are improved, and the content of a toxic element lead is reduced. The thermal stability and the water stability of the perovskite are improved by the coating of the silicon dioxide. The conditions are provided for application of the full-inorganic perovskite quantum dots in biological and aqueous environments.
Owner:GUANGDONG UNIV OF TECH
Method for analyzing storage time of medicinal-flavor liquor without analyzing compounds
PendingCN111579624AEasy to operateLow costComponent separationMaterial electrochemical variablesChemical compoundPhysical chemistry
The invention relates to a method for analyzing the storage time of medicinal-flavor liquor without analyzing compounds, which comprises the following steps: S1, taking medicinal-flavor liquor samplesof different years, respectively standing for a preset period of time, and diluting to obtain a diluent; S2, respectively inserting a three-electrode system into the diluent, and collecting electrochemical fingerprints of the medicinal-flavor liquor samples of different years; S3, determining a function relationship between the liquor year and the characteristic oxidation peak value according tothe electrochemical fingerprint spectrums of different years; S4, sequentially treating the medicinal-flavor liquor of the to-be-detected year by the steps S1 and S2 to obtain an electrochemical fingerprint spectrum of the liquor of the to-be-detected year; and S5, fitting according to the characteristic oxidation peak-to-peak value of the electrochemical fingerprint spectrum of the liquor of theto-be-detected year and the function relationship to obtain the storage year of the medicinal flavor type liquor of the to-be-detected year. According to the method, the characteristic oxidation peakvalue is detected by analyzing the relationship between the content of the electrochemical active substances in the liquor and the time, so that the year of the liquor is detected and judged.
Owner:HANGZHOU DIANZI UNIV
A portable subsea shallow geological disaster simulation device
ActiveCN109425901BFix security issuesEnsure safetySeismology for water-covered areasOffshore oil and gasHazard
The invention provides a portable seabed shallow geological hazard simulation device, which comprises an experimental assembly, a fluid conveying assembly and a pressure adjustment assembly, wherein the experimental assembly is used for simulating seabed shallow geological characteristics, the fluid conveying assembly is used for injecting an experimental fluid into the experimental assembly, thepressure adjustment assembly is used for adjusting the pressure inside the experimental assembly, the experimental assembly is internally preset with gravel used for simulating the unconsolidated formation, and two ends of the pressure adjustment assembly are respectively connected with the experimental assembly and the fluid conveying assembly. The portable seabed shallow geological hazard simulation device has the advantages of ensuring the safety of offshore oil and gas exploration and development and being convenient to carry.
Owner:CHINA PETROLEUM & CHEM CORP +2
Metal foil CNC cutting and gluing direct molding additive manufacturing equipment and method
ActiveCN111843184BNo need to meltAvoid heat cracksLiquid surface applicatorsAdditive manufacturing apparatusNumerical controlRobot hand
Owner:SHENYANG AEROSPACE UNIVERSITY
A method for growing perovskite single crystal by layer solution method
ActiveCN110195252BImprove crystal qualityHigh crystallinityPolycrystalline material growthFrom normal temperature solutionsPhysical chemistrySingle crystal
The invention provides a method for growing a perovskite single crystal by using a layer solution method, and belongs to the technical field of single crystals of perovskite materials. According to the present invention, by adding the frozen layer of a solution A or solution B between the solution A and the solution B, the mixing rate of the solution A layer and the solution B layer can be reduced, and the heat released by the reaction of the two solution layers can be offset by the frozen layer, such that the reaction between the two solution layers is gentle, the crystal nucleation and growth process is stable, and the perovskite single crystal obtained after the standing culture has characteristics of large size, high quality and flat surface; the method has advantages of simple operation, no requirement of precise growth equipment, low requirements on the experimental environment, low cost and wide universality for the single crystal preparation; and the results of the embodimentsshow that the perovskite single crystal obtained by the method can have a length of 0.5-2 cm, and has good crystallinity.
Owner:XIANGTAN UNIV
A test platform that can provide a low temperature environment
ActiveCN108827592BFast installationWide installation speedHydrodynamic testingIce waterTest requirements
The invention relates to a test platform capable of providing a low temperature environment, and belongs to the technical field of pool test. The test platform comprises a support, a toughened glass framework, an ice pushing device and a refrigeration system. The support is composed of an inner support and an outer support, and has the advantages including rapid installation and low cost. Use of the toughened glass provides convenience for video-recording and shooting of a test process. The ice pushing device can install U-shaped plates of different widths, lengths and heights according to different test requirements. A pneumatic set and a refrigerating set are used to provide the stable low-temperature environment for the test platform, ice thawing and change of mechanical properties canbe prevented effectively, and the ice state can approach the practical condition more. The test platform can be used for cutting and collision test of propeller and ice as well as collision test of ice and other structured objects, and water can be added into the toughened glass to make a ice-water-structured object test research, and thus, application range of the test platform is wider.
Owner:HARBIN ENG UNIV
An experimental device and method for simulating secondary explosion in situ
InactiveCN104655817BGuaranteed concentrationImprove securityFuel testingFlame arresterCombustible gas
Owner:QINGDAO UNIV OF SCI & TECH
Free multi-vision angle, real-time three-dimensional reconstruction system and method
InactiveCN101320473BLighting no special requirementsExperimental environment requirements are lowImage analysis3D modellingImage segmentationDepth of field
Owner:SHANGHAI UNIV
Porous carbonate and porous oxide preparation methods
ActiveCN103539121BNo damageZero emissionOxide/hydroxide preparationZinc oxides/hydroxidesFiltrationRoom temperature
The invention relates to porous carbonate and porous oxide preparation methods. Crystal water-containing salts of same or different metal ions which can form carbonate precipitates are selected, the crystal water-containing salts are added with a precipitator and a pore-forming agent, the mixed raw materials are mixed uniformly and then are grinded at a room temperature for 5-600min, the grinded raw materials are taken out and then is stood for 0.5-24h, the stood raw materials are taken out and then are subjected to suction filtration, the filtration product is washed by a washing agent so that the pore-forming agent is removed, and the washed product is dried to form a porous carbonate; and the porous carbonate is calcined to form a porous oxide. The porous carbonate and porous oxide preparation methods are green and environmentally friendly, can be carried out at a room temperature under normal pressure, are free of high temperature and high pressure conditions and have an obviously reduced cost.
Owner:SHANDONG UNIV
A kind of preparation method for the copper substrate of vertical structure led chip
ActiveCN104638096BSolve efficiency problemsSolve the problem of longevitySemiconductor devicesCopper platingLight-emitting diode
The invention provides a preparation method for a copper substrate for vertical LED (light-emitting diode) chips, which includes the following steps: (1) a P-type metal electrode layer is deposited on the surface of an epitaxial wafer, a layer of Au is then plated on the P-type metal electrode layer, and thereby a first substrate is obtained; (2) the first substrate is cleaned, and after a degreasing effect is achieved, H2SO4 is used for surface activation; (3) a phosphorized copper anode is blackened, and is then cleaned; (4) the first substrate treated in step 2 and the phosphorized copper anode treated in step 3 are put into copper plating solution and electroplated, so that an electroplated sample is obtained; (5) the electroplated sample is cleaned in order to remove residual copper plating solution, so that the copper substrate is obtained. The preparation method has the characteristics of simple process and low preparation cost, moreover, the copper substrate prepared by the method has the characteristics of no burrs, good surface uniformity, good smoothness, low roughness and good thermal and electric conductivities, and thereby a chip which is prepared by adopting the copper substrate has high light extraction efficiency.
Owner:广州市众拓光电科技有限公司
A Method for Cutting Two-Phase Composite Materials Using Ultrafast Laser
ActiveCN108817699BSmall heat affected zoneStructural continuityWelding/soldering/cutting articlesLaser beam welding apparatusTwo phase compositeWavelength
The invention provides a method for cutting a two-phase composite through an ultrafast laser. According to the method for cutting the two-phase composite through the ultrafast laser, through finding of the intersection point of incubation effect curves of two different materials in the composite, the cutting speed, wavelength and cutting energy needed by the laser at the intersection point are obtained; the problem that in the prior art, the two-phase common threshold value, capable of meeting two materials, of the composite cutting single-pulse laser in the two-phase component is difficult tofind is solved, and the problem that in the two-phase component, a reinforcement phase or a matrix phase locally falls off, and a fine structure is discontinuous are solved; and the method is simplein process, clear in step and good in reliability.
Owner:BEIJING SATELLITE MFG FACTORY
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