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122results about How to "Reduce experiment costs" patented technology
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Device for measuring hydrogen embritllement sensitivity of materials in low-temperature environment
InactiveCN101706395AFix security issuesReduce experiment costsMaterial strength using tensile/compressive forcesMeasurement deviceHigh pressure hydrogen
The invention discloses a device for measuring hydrogen embritllement sensitivity of materials in a low-temperature environment, consisting of an experiment table base 2, an experiment box 8, a stress application shaft 9, a sample clamping part, a hydrogen charging interconnecting piece and a temperature measuring and adjusting device 18, wherein the sample clamping part consists of a loading clamp A5, a loading clamp B6 and a fixed clamp 4 and is arranged in the experiment box 8; the stress application shaft 9 passes through the center of the experiment box 8 from the upper part, the lower part of the stress application shaft 9 is coaxially connected with the upper part of a sample 12 through the ample clamping part, the hydrogen charging interconnecting piece passes through the center of the experiment box through the lower part, and the upper part of the hydrogen charging interconnecting piece is coaxially connected with the lower part of the sample 12 through threads; and the temperature measuring and adjusting device 18 is arranged in the experiment box 8. The device is used for measuring the change of mechanical property of the materials in a high-pressure hydrogen charging environment; no high pressure cavity is used and only a low temperature environment is provided in the cavity, so the experiment process is extremely safe and the problem of potential safe hazard caused by the high pressure cavity used in the traditional hydrogen charging experiment can be solved.
Owner:NANJING UNIV OF TECH
Lightning effect test device for dynamic airplane
ActiveCN102087322AReduce sources of errorReduce experiment costsElectrical testingElectromagentic field characteristicsCircular discScale model
The invention discloses a lightning effect test device for a dynamic airplane. A computer in the device is arranged outside a microwave dark room; a round turntable A, a round turntable B, an airplane scale model, a lightning generator, a spectrum recorder, a support platform and a camera are arranged in the microwave dark room; the camera is mounted on the support platform; the airplane scale model is mounted on the round turntable A; the spectrum recorder is mounted on or in the airplane scale model; and the lightning generator is mounted on the round turntable B. When the round turntable A and the round turntable B rotate relatively, various types of lightning analogue currents and electromagnetic waves generated by the lightning generator act on the airplane scale model; and when the lightning happens, the spectrum recorder records the lightning indirect effect, and the camera records the lightning direct effect. According to the invention, the process that the airplane in dynamic flying mode encounters lightning can be simulated in the limited space of the microwave dark room so that the tested data approaches to the real conditions better and the error is reduced.
Owner:BEIHANG UNIV
Device for changing Mach number in supersonic velocity wind tunnel model experiment and working method
InactiveCN102607799AReduce the cost of wind tunnel experimentsSimple structureAerodynamic testingShock waveEngineering
The invention discloses a device for changing Mach number in a supersonic velocity wind tunnel model experiment and a working method, which relate to the technical field of supersonic velocity wind tunnel experiments. The invention comprises an experiment model and a wind tunnel support element. The wind tunnel support element comprises a support base and a wind tunnel support. The experiment model is fixed on the wind tunnel support through the support base. The wind tunnel support element further comprises a shock wave plate fixed on the wind tunnel support element. The device for changing the Mach number in the supersonic velocity wind tunnel model experiment solves the problem that the model experiment at certain Mach numbers cannot be performed by the supersonic velocity wind tunnel and avoids the problem that parameter interpolation brings errors under two experimental states where the Mach numbers are more than or less than the set Mach number, so that the actual aerodynamic performance of the experiment model at a special Mach number can be obtained and half of the cost for the wind tunnel experiment is reduced.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
System and method suitable for quality control of reverse solidification technique
The invention discloses a system and a method suitable for quality control in an inverse solidification process. The system mainly comprises a data acquisition module, a visualized display module, and an adaptive expert system, wherein the adaptive expert system comprises a defect diagnostic reasoning module, a processing parameter reasoning module, an adaptive rule base correcting module, and a knowledge base. The processing parameter reasoning module reasons and provides optimized processing parameters before production, the data acquisition module and the visualized display module carry out data acquisition and visualized animation display on a detected production process, the defect diagnostic reasoning module analyzes performance and defects of products, and the adaptive rule base correcting module extracts defect analysis result of the products and the processing parameters re-correct rule to be fed back and applied to the processing parameter reasoning module so as to carry out a new production process. The system and the method can remarkably improve combination quality of a motherboard solidification layer in the inverse solidification process, accumulate processing experience, reduce defect, and save experiment expense.
Owner:BEIHANG UNIV
Testing device and method for comprehensive heat transferring flow of protective slag of continuous casting crystallizer
ActiveCN103969292APrecise and controllable melt pool temperatureConvenient experimentMaterial heat developmentCalorimeterMolten stateSlag
The invention discloses a testing device and method for comprehensive heat transferring flow of protective slag of a continuous casting crystallizer. The method comprises the following steps: a graphite crucible is used for melting the protective slag for continuous casting and keeping the protective slag warm in an electric induction furnace, and ingredients and temperature of the protective slag are uniform and consistent; a positioning electrode is used for calibrating the liquid level of a melting pool, a copper mold for simulating the crystallizer is inserted into a protective slag pool in a molten state under mechanical driving, water is introduced into the copper mold for cooling, and the liquid protective slag is quickly cooled on the copper mold so as to form a protective slag film; a temperature data acquisition system tests process temperature data by four thermoelectric couples in two rows embedded in the copper mold, and the heat transferring flow passing through the protective slag is calculated in real time by a computer; in the whole process, vibration with certain amplitude and frequency of the copper mold can be realized, and the vibration mode of the continuous casting crystallizer in the process of metallurgical production of steel iron can be simulated. The method disclosed by the invention has the advantages that the liquid level of the melting pool can be accurately controlled, the comprehensive heat transferring flow of the protective slag is tested in real time, and the data accuracy is high; the testing process is convenient, stable and reliable, and the experimental cost is low.
Owner:CENT SOUTH UNIV
Simulation experimental apparatus for intelligent arm support system of concrete pump truck and method thereof
InactiveCN102354120AAccelerate the intelligent processReduce experiment costsSimulator controlDesign optimisation/simulationTechnical supportSmart control
The invention relates to a simulation experimental apparatus for an intelligent arm support system of a concrete pump truck and a method thereof. The apparatus comprises a hand-held remote controller, a path planner, a motion controller and an object simulator. Instruction sending and state information receiving between the hand-held remote controller and the path planner are realized through a wireless mode; the path planner sends a control output quantity to the motion controller and then the motion controller converts the control output quantity into a corresponded signal to drive the object simulator; and the object simulator completes simulation on an execution mechanism, a kinematics model, a dynamics model and all arm support detection devices of the concrete pump truck; and then results are feedbacked to the path planner. According to the invention, reasonable division is carried out on key portions of an intelligent arm support system of a concrete pump truck; technologies like a computer simulation technology are employed; and verification on various arm support models and intelligent control algorithms thereof is realized; therefore, a theoretical basis and a technical support are provided for improvement on the intelligent arm support system of the pump truck; and problems on uncertainty, danger, high costs and long period in an actual arm support system experimentcan be solved.
Owner:SOUTHEAST UNIV
Finite element simulation method of beam_plate shell structure
InactiveCN105302994AImprove mesh qualitySimple resultSpecial data processing applicationsElement modelEngineering
The invention relates to a finite element simulation method of a beam_plate shell structure. The finite element simulation method comprises the steps of establishing the research of a beam unit and a plate shell unit, and a finite element model; determining the boundary conditions of a beam_plate shell model; carrying out strength calculation and mode analysis; and evaluating the calculation result, wherein the establishment of the research of the beam unit and the beam_plate shell unit and the finite element model comprises the steps of researching the beam unit and setting real constants based on cross-section shape, namely carrying out parameterization on the beam_plate shell unit; researching the characteristics of the plate shell unit and the coupling characteristics of plate shell unit and the beam unit, namely coupling stiffness matrix degree of freedom; and creating the finite element model of the beam_plate shell structure by applying the parameterized beam_plate shell unit and the stiffness matrix degree of freedom. The finite element simulation method has the advantages of good grid quality, intuitive result and the like, and is beneficial to promoting the design level, shortening the design period, reducing the experiment expense, and reducing the potential fault danger.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Functional pipetting head with double purification functions of ultra-filtration and solid extraction and application of functional pipetting head
ActiveCN104549593AThe production process is simple and controllableSimple structurePreparing sample for investigationUltrafiltrationAdhesive glueSolid phase extraction
The invention relates to an experiment device for pretreatment on samples, and in particular to a functional pipetting head with double purification functions of ultra-filtration and solid extraction, and application of the functional pipetting head in pretreatment and quantitative analysis on a biological sample in the medicine analysis process. The functional pipetting head comprises a pipetting head body, a solid-phase extraction material and a hollow fiber membrane, wherein the hollow fiber membrane is arranged at the sharp end of the pipetting head body; an adhesive is uniformly applied at the cross part of the sharp end of the pipetting head and the hollow fiber membrane; an upper end opening and a lower end opening are formed in the hollow fiber membrane; the upper end opening is sealed; the lower end opening is kept in an opened state; the solid-phase extraction material is arranged inside the pipetting head body. The functional pipetting head is simple, convenient and controllable in manufacturing process, flexible in extraction condition adjustment, scientific and reasonable in method, convenient in obtaining materials, and good in application prospect.
Owner:ZHEJIANG ACAD OF TRADITIONAL CHINESE MEDICINE
Astrocyte separating and cultivating method
The invention relates to an astrocyte separating and cultivating method, which is appropriate for various experimental animals and human. The method mainly aims at the problems in the prior art, and improves the method for separating and cultivating astrocyte in vitro at present. The method comprises five experimental steps: cerebral cortex tissue separation, filtering by a seive after tissue cell trituration, cell primary culture, continuous cell culture, and astrocyte identification. The whole method is simple and practicable. Purity of the astrocyte cultivated and obtained by the method reaches more than 95% and the astrocyte grows well, is rapid in cell proliferation, and can be continuously cultured for many times and meets the demand of various experiments of cytobiology.
Owner:黄柏胜
Experimental method and experimental platform for adjustable high-lift water hydraulic ram pump
InactiveCN104454491ALower the height of the outlet pipeLower the altitudePump testingPositive-displacement liquid enginesExperimental methodsHydraulic pump
The invention relates to an experimental method and an experimental platform for an adjustable high-lift water hydraulic ram pump. The experimental platform comprises an upper pool which is connected through a water inlet pipe and a lower pool which is provided with a hydraulic ram pump body, an outlet of a water outlet pipe of the hydraulic ram pump is formed in the upper portion of the upper pool, a plurality of branch pipes which are connected in parallel are arranged on the water outlet pipe, all the branch pipes are provided with resistance adjusting elements capable of adjusting different lift ranges respectively, and a pressure sensor is arranged at the position where the water outlet pipe and the hydraulic ram pump are connected. According to the experimental method and the experimental platform, the pressure sensor is arranged at a water outlet of an air tank of the experimented hydraulic ram pump, the resistance adjusting elements are arranged on the water outlet pipe, the pressure of the water outlet pipe is adjusted by the resistance adjusting elements, the pressure parameters of the water outlet pipe are acquired through the pressure sensor, and the pressure parameters of the water outlet pipe are converted to be simulated lifts. Accordingly, the height of the water outlet pipe of the hydraulic ram pump is decreased, and the lifts of the hydraulic ram pump can be simulated. By means of the experimental method, the experimental height of the hydraulic ram pump can be greatly decreased, the experimental cost is saved, and the experimental parameters of the water ram pump under various lifts can be acquired with the lowest cost.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Simulation evaluation method of compressor piping vibration of constant frequency air conditioner
InactiveCN108763715AQuickly assess vibration conditionsAccurate vibrationGeometric CADDesign optimisation/simulationConstant frequencyElement model
The invention relates to the piping field of a compressor of a fixed frequency air conditioner. The invention solves the problems that the piping mode analysis of the fixed frequency air conditioner can not be quantified and the natural frequency point of the pipe which is close to the operation frequency of the compressor can not be accurately judged according to the piping mode analysis, and a simulation evaluation method of the compressor piping vibration of the constant frequency air conditioner is presented. The main points of the technical scheme are as follows: firstly, the accurate finite element model of the compressor pipe is determined; secondly, the boundary conditions are applied to the finite element model and the modal analysis is carried out; then, whether the modal analysis result accords with the evaluation standard of piping modal analysis is judged, if so, the compressor pipe is trial-manufactured, otherwise, boundary conditions and load excitation are applied to the determined finite element model, and harmonic response analysis is performed; then whether the harmonic response analysis result accords with the piping harmonic response analysis evaluation criteria is determined, if so, the compressor pipe is trial-manufactured, otherwise, the finite element model is re-determined after pipe structure optimization.
Owner:四川长虹空调有限公司
Hollow-fiber membrane liquid-phase micro-extraction and liquid chromatography coupling device and polysaccharide component on-line quantitative analysis method thereof
ActiveCN104931609AEffective contactImprove purification effectComponent separationMegasonic cleaningBottle
The invention relates to a hollow-fiber membrane liquid-phase micro-extraction and liquid chromatography coupling device and a polysaccharide component on-line quantitative analysis method thereof. The device comprises a sample feeding part, a liquid chromatography pump, a six-way valve, a chromatographic column, a detector, a sample ring, a waste liquid bottle and an ultrasonic washer, wherein a hollow-fiber membrane liquid-phase micro-extraction device is arranged inside the ultrasonic washer; general liquid chromatography pipelines are arranged at two ends of the hollow-fiber membrane liquid-phase micro-extraction device; the general liquid chromatography pipeline at one end is connected to the six-way valve and the sample feeding; the six-way valve is respectively connected to the liquid chromatography pump, the chromatographic column, the sample ring and the waste liquid bottle; the chromatographic column is connected to the detector; the detector is connected to the waste liquid bottle. The hollow-fiber membrane liquid-phase micro-extraction and liquid chromatography coupling device has the characteristics as follows: samples are efficiently and quickly purified; the method is scientific and reasonable; the extraction conditions are adjustable; the application prospect is good.
Owner:丽水智客汇信息服务有限公司
Experimental device for simulating smoke prevention system of heating and ventilation equipment of high-rise building
InactiveCN103077652AImprove securityThe experiment process is intuitiveEducational modelsWater dischargeWater storage tank
The invention relates to an experimental device for simulating a smoke prevention system of heating and ventilation equipment of a high-rise building. The experimental device comprises a head brine tank, a head clear water tank, a water storage tank and a high-rise building model, wherein the bottom of the head clear water tank is connected with a clear water discharge pipe, the bottom of the head brine tank is connected with a brine discharge pipe, the water storage tank consists of an inner water tank and an outer water, and the high-rise building model is positioned in the inner water tank; and a storey area and a vertical shaft area are distributed on the left side and the right side of the high-rise building model, wherein each storey of the storey area is communicated with the clear water discharge pipe, each storey of the storey layer and the vertical shaft area are communicated through a gap of an simulated elevator door, the top of the high-rise building model is communicated with the brine discharge pipe through a brine buffer, the top of the vertical shaft area is provided with a top opening, the bottom of the vertical shaft area is provided with a bottom opening, and the bottom opening is communicated with the outer water tank. The experimental device disclosed by the invention has the capabilities of predicting a temperature field in a prototype building by a building model experiment, intuitively demonstrating the generation and development process of smoke and providing important experiment data for achieving a scheme for elevating a neutral plane to be above the total height of the building.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Method for simulating electric drive control system under brake working condition of electric-wheel truck
ActiveCN101655691AAvoid repeated performance comparison experimentsShorten the development cycleSimulator controlBraking systemsElectric generatorGenerator control
The invention relates to application of computer simulation in an electric drive control system under a brake working condition of an electric-wheel truck, in particular to a method for simulating theelectric drive control system under the brake working condition of the electric-wheel truck. Under the power brake working condition, the control system consists of a wheel motor control part and a main generator control part, wherein the wheel motor control part calculates to obtain characteristic curves of excitation current and armature current according to related data, analyzes the working logic under the brake working condition, obtains characteristic curves of various links such as URS-Imf*, V-Imf*, V-Ia*, Imf*-Imf, and B-1 / R, and combines the power brake characteristics of the wheel motor to establish a simulation map of a wheel motor part under the power brake working condition in a Simullink environment; and the main generator control part establishes a simulation map of a maingenerator part under the power brake working condition in the Simulink environment by combining the main generator structure according to a main generator control schematic diagram. The method verifies the correctness of a scheme by comparing a simulation result and a demand characteristic curve of the system.
Owner:ANSTEEL GRP MINING CO LTD
Construction of slender flexible filamentous particle model and numerical simulation method thereof
PendingCN111062132ASolve the problem of spherical particlesEasy to bend and deformDesign optimisation/simulationCAD numerical modellingEffective solutionField experiment
The invention provides construction of a slender flexible filamentous particle model and a numerical simulation method thereof. According to the invention, a slender flexible filamentous particle model is constructed according to the physical characteristics of slender flexible filamentous biomass and is coupled with open source OpenFoam software; numerical simulation of the slender flexible filamentous particles in the fluidization processing process is realized; a numerical simulation result can be used for holographic simulation of motion characteristics of the slender flexible filamentousparticles in a fluidization processing process; the fluidization form and the mass and heat transfer efficiency of the slender flexible filamentous particles under different working conditions are vividly represented; tests prove that the simulation result of the method basically tends to be consistent with that of field experiment data; the reliability is high, the interaction mechanism of the long and thin flexible filamentous particles in the fluidization process is conveniently and efficiently captured and reproduced and is truly and objectively reflected, an effective solution is providedfor improvement and optimization design of fluidization processing equipment of the long and thin flexible filamentous particles, and the method has important theoretical significance and practical value.
Owner:CHINA TOBACCO SHAANXI IND
Preparation of magnetic porous graphene and rapid detection method of low-concentration triclosan in water by employing magnetic porous graphene
The present invention relates to the field of water quality detection, and provides a preparation method of magnetic porous graphene. The oxidized graphene and potassium hydroxide are mixed for activating treatment, and the obtained porous oxidized graphene, ferric trichloride, sodium acetate and ethylene glycol are mixed for hydrothermal reaction to obtain magnetic porous grapheme. The magnetic porous grapheme has huge superficial area, can absorb a lot of triclosan, has magnetism and is convenient for recycle. The present invention further provides a rapid detection method of low-concentration triclosan in water. The method takes the magnetic porous grapheme as an adsorption substrate to absorb triclosan in water, achieves separation through a magnet, and detects the content of the triclosan through steps of elution, derivatization and extraction. The method is simple in operation, is low in detection limit, does not need to use a mass spectrometer, only uses a gas chromatograph fordetection, is good in repeatability, high in recovery rate, and mature and reliable, and can be applied to detection of the content of the triclosan in the actual waste water.
Owner:NORTHEAST NORMAL UNIVERSITY
Automatic control method for RF amplifier gain based on varying electrical bridge principle
InactiveCN101123419AImproved Gain Control AccuracyImprove reliabilityHigh frequency amplifiersGain controlAutomatic controlClosed loop
The invention relates to a method to control radio-frequency amplifier gain based on the deformation bridge theory. When the variance Delta Ubc of the differential voltage between a comparative end and a reference end equals to Delta k and also equals to 0, the high precision of the radio-frequency amplifier gain is stable, and the variance and the adjustment quantity of the radio frequency gain are balanced completely. When the variance and the adjustment quantity of the gain are balanced completely, parameters in the formula are as follows: Delta K1 (dB) is the variance of the radio frequency gain; Delta L2 (dB) is variance of attenuation of a digital control attenuator; Delta K3 (dB) is the signal gain of the reference end of an automatic gain control circuit; Delta K4(dB) is the signal gain of the comparative end of the automatic gain control circuit. The invention adopts the closed loop gain control proposal, and the circuit is simple. The gain control precision is high and is as high as 0.2 dB. The system structure is simple, and is designed rationally. The cost of development is low, and a lot of experimental expenses are saved. The invention solves the problems of poor stability of the radio-frequency amplifier gain, the complicated gain control circuit, low reliability of the system and high cost of development.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Method for predicting combined chronic toxicity of antibiotic pollutant
InactiveCN102435599ALarge predicted throughputReduce investmentChemiluminescene/bioluminescenceFluorescence/phosphorescenceBinding energyMedicine
The invention discloses a method for predicting the combined chronic toxicity of an antibiotic pollutant. The method comprises the following steps: 1, acquiring physical and chemical parameters of an antibiotic; 2, acquiring an acceptor protein, constructing a homologous model of the acceptor protein, and determining the mutual binding energy between the antibiotic and the acceptor protein; 3, determining the combined toxicity of the antibiotic; 4, establishing a prediction model for the chronic combined toxicity on the basis of the physical and chemical parameters of the antibiotic, the mutual binding energy between the antibiotic and the acceptor protein and the combined toxicity of the antibiotic; and 5, predicting the combined toxicity of the antibiotic through the model obtained in step 4. The method of the invention, which has the advantages of wide application range, no need of complex detection equipment, no test and environment pollution, and accurate prediction of the toxicity of the antibiotic composite pollutant, provides the scientific basis for the antibiotic pollutant discharge enforcement and the ecological risk evaluation.
Owner:TONGJI UNIV
Constructing and applying method of entry vectors pAmpGate and pGentGate
ActiveCN106222186AReduce experiment costsNucleic acid vectorVector-based foreign material introductionGolden gateRecognition sequence
The invention discloses a constructing and applying method of entry vectors pAmpGate and pGentGate. The entry vectors are annular vectors with DNA fragments A, and the 5' ends to the 3' ends of the DNA fragments contain attL1 sequences, identification sequences for IIs-type restriction enzymes A, identification sequences for IIs-type restriction enzymes B, first screening tag sequences, identification sequences for IIs-type restriction enzymes B, identification sequences for IIs-type restriction enzymes A and attL2 sequences. According to the entry vectors, the Golden Gate construction method can be adopted to replace traditional BP reactions to construct entry cloning, expensive BP enzymes can be replaced with the economical IIS-type restriction enzymes and DNA ligase, and the experiment expense is greatly saved; meanwhile, the entry vectors can be used for both single-fragment-DNA recombination cloning and multi-fragment efficient 'seamless' jointing, and the construction and applying method are quite economical, convenient and fast in practical researching.
Owner:INST OF CEREAL & OIL CROPS HEBEI ACAD OF AGRI & FORESTRY SCI
Safir auxiliary power device starting test simulator and control method
ActiveCN109738195AAchieving complete determinationPrecise positioningInternal-combustion engine testingTemperature controlSimulation
The invention relates to a Safir auxiliary power device starting test simulator and a control method. The Safir auxiliary power device starting test simulator comprises a rotation speed and rotation speed time curve control circuit, a gas temperature control circuit, a starting test simulator interface circuit, a signal generation unit and an impedance matching load unit; the signal generation unit completes input signal simulation; and the impedance matching load unit completes output signal simulation. By means of the Safir auxiliary power device starting test simulator and the control method in the invention, when the test run of the starting simulator is not carried out on the ground, the purpose of completely measuring technical parameters is achieved; simultaneously, a fault part inthe Safir auxiliary power device complete system also can be located accurately; therefore, the system security is effectively ensured; the test cost is reduced; the test period is shortened; and thepilot security is ensured.
Owner:成都国营锦江机器厂
Determination method for polar components in edible oil
InactiveCN103592198AReduce consumptionAvoid memory effectWeighing by removing componentOil and greaseDistillation
The invention provides a determination method for polar components in edible oil, which relates to determination methods for edible oil. The method comprises the following steps: dissolving a semisolid or solid sample, carrying out filtering, then dissolving an oil sample in a mixed solution of petroleum ether and ether and allowing a volume to be fixed at 10 mL; drying silica gel, cooling the silica gel to room temperature, adding water, transferring the silica gel to the syringe of an injector, compacting the silica gel, adding sea sand or quartz sand and then adding the mixed solution of petroleum ether and ether along the wall of the syringe so as to wet the silica gel; when the surface of the mixed solution of petroleum ether and ether and the surface of sea sand or quartz sand are parallel and level, dissolving the oil sample in a chromatography column, adding the mixed solution of petroleum ether and ether for elution of nonpolar components, collecting eluate to a flask or beaker and carrying out drying by distillation and then weighing; studying separation effects of the nonpolar components; and carrying out calculation.
Owner:XIAMEN UNIV
Calculation method for shallow nanoindentation elasticity modulus based on molecular dynamics simulation
InactiveCN107506522AGuaranteed stabilityReduce experiment costsDesign optimisation/simulationSpecial data processing applicationsNanoindentationNanoscopic scale
The invention discloses a calculation method for shallow nanoindentation elasticity modulus based on molecular dynamics simulation. The calculation method comprises the following steps that: establishing a shallow nanoindentation molecular dynamics simulation model, determining the parameter of molecular dynamics simulation calculation, vertically downwards pressing a pressure head module into a workpiece module, and adopting a molecular dynamics simulation method to obtain the acting force-displacement data of a Newton layer through calculation; and drawing the acting force-displacement data into an atlas to obtain an acting force-displacement curve, distinguishing a curve elastic deformation area and a plastic deformation area according to the acting force-displacement curve, and carrying out calculation to obtain the elasticity modulus of the workpiece module according to a Hertz theory and the force-displacement data of the curve elastic deformation area. By use of the calculation method disclosed by the invention, experiment cost can be greatly lowered, experiment stability is guaranteed, an indentation process is dynamically displayed, and the calculation method has a guidance meaning for nanoscale measurement processing.
Owner:TIANJIN UNIV
Device and method for simulating the migration of pollutants in tidal reciprocating river channels and the upward movement of brine
Owner:HOHAI UNIV
Method for establishing anti-hepatitis C virus drug screening experimental animal model
InactiveCN1879894AIncrease success rateSmallIn-vivo testing preparationsHepatitis C Virus PositiveHepacivirus
The invention relates to a method for selecting anti-hepatitis C medicine, which injects the artifical hepatitis C virus into tree mouse with negative hepatitis C, to build the hepatitis C natural infection model; via following steps as (1) composing hepatitis C virus; (2) injecting it into normal tree mouse, while the virus carried amount of each animal is higher than 105c; (3) fixing the hepatitis C virus naturally to infect the tree mouse model; (40 using the mouse model with positive hepatitis C virus to select the anti- hepatitis C medicine.
Owner:李卫云
Galvanized plate zinc mass detection method
The invention discloses a galvanized plate zinc mass detection method comprising the following steps of 1, preparing a soluble zinc chemical solvent; 2, preparing a galvanized plate sample; 3, puttingthe galvanized plate sample into the soluble zinc chemical solvent; and 4, computing the zinc mass of the galvanized plate sample. Compared with an existing chemical detection method, the galvanizedplate zinc mass detection method provided by the invention is smaller in loss degree of steel substrate, strong in zinc layer dissolving capacity and increased in reliability of data result; the usedsolvent is small in toxicity, the solution is simple to prepare, and the waste liquid is simple to process; the experimental expense is low, and the zinc mass result detection can be completed withoutpurchasing large instruments. The important practical value and scientific significance are provided for researchers for measuring the zinc mass of the galvanized plate.
Owner:TANGSHAN IRON & STEEL GROUP +1
Spectrophotometer for batch detection, and detection method thereof
InactiveCN111707630AReduce mechanical structureGuaranteed transmittanceColor/spectral properties measurementsCuvetteEngineering
The invention discloses a spectrophotometer for batch detection, and a detection method thereof, and belongs to the field of detection equipment. The spectrophotometer comprises light path systems, wherein the plurality of light path systems which are arranged in a straight line are respectively provided with a conveying belt and a bench, a plurality of cuvettes are arranged on the conveying beltand the bench at equal intervals by taking the light path system as a symmetry axis, a liquid injection station and a plurality of detection stations are arranged above the conveying belt, a dumping station, a cleaning station, a drying station and a preparation station are arranged above the conveying belt, a liquid injector is arranged above the liquid injection station, and a liquid collectingdisc, a cleaner and a dryer are arranged below the dumping station, the cleaning station and the drying station respectively. According to the invention, the touch frequency of the cuvette can be reduced or eliminated, the accuracy of the wavelength of monochromatic light can be improved, the residual components of detection liquid on the cuvette can be reduced, the detection speed can be increased, the detection cost can be reduced, and the accuracy of the detection result can be improved.
Owner:李明亮
Determination method for activity coefficient of solute component in metal melt at high temperature
The invention belongs to the field of metallurgy experiment at a high temperature, in particular to a determination method for an activity coefficient of a solute component in metal melt at the high temperature. A double-crucible reference method comprises two experimental group reacting crucibles and a reference crucible. Appropriate reference metal is selected from the reference crucible to balance with MOx oxide, so that the activity coefficient of M in the reference metal is determined. Crucibles with similar materials are utilized as the two experimental crucibles, the reference metal and solvent metal to be researched are respectively put in the two experimental crucibles, and proportions of balancing slag are completely the same. When the balancing is carried out in the same experiment and the same atmosphere, according to the M content in the metal and the activity coefficient of M in the reference metal, the activity coefficient of M in the metal melt is obtained. By the adoption of the method, the difficulty of the metallurgy experiment at the high temperature is lowered, the experimental cost is decreased, and the obtained data is more accurate and reliable.
Owner:UNIV OF SCI & TECH BEIJING
Impact wave travel time parameter measuring method for single-path optical fiber and device
InactiveCN102322936ARealize measurementWide applicabilityVelocity propogationUsing wave/particle radiation meansPulse sequenceOptical fiber coupler
The invention discloses an impact wave travel time parameter measuring method for a single-path optical fiber and a device. One transmission optical fiber is arranged on an impact wave spreading passage, a plurality of impact sensing units are arranged on the transmission optical fiber according to certain time intervals, one end of the transmission optical fiber is connected with a heavy frequency pulse laser and a photoelectric detection unit through a one-to-two optical fiber coupler, and the other end of the transmission optical fiber is exposed for forming the end surface reflection. Theaverage spreading speed of impact waves among the sensors is calculated through measuring the distances between the sensors and recording the distortion moment of the heavy frequency pulse sequence signals when the impact waves reach the sensors, and the image sensing unit is an optical fiber ring sensing head or a precut bare optical fiber sensing head, and the like. The method and the device realize the impact wave travel time parameter measurement at the pressure of MPa level and over MPa level and have the characteristics that the structure is simple, the manufacture is convenient, the cost is low, and the like. The experiment cost can be greatly reduced.
Owner:NORTHWEST INST OF NUCLEAR TECH
Double-crucible experimental apparatus for high-temperature experiment
InactiveCN102247902ASolve erosionOvercome the pitfalls of separate studiesCruciblesThermodynamicsSlag
The invention discloses a double-crucible experimental apparatus for a high-temperature experiment, which belongs to the field of high-temperature metallurgical experiments, is used for a slag-molten metal-gas phase balance experiment of high-temperature metallurgy and can solve the problem of erosion of crucibles by slag and molten metal in a high-temperature metallurgical residue / metal reactionexperiment. Unique metal crucible design is utilized, and a metal crucible is combined with a ceramic crucible. The ceramic crucible is used for holding molten metal; and the slag is collected up by using a convex liquid surface which is formed by waist-reduced drum-shaped metal crucible and molten metal, so that the ceramic crucible is not eroded by the slag during the experiment, and the slag does not react with the waist-reduced drum-shaped metal crucible. The vertical double-crucible experimental apparatus does not affect an experimental atmosphere and is not limited to the experimental atmosphere, and the high-temperature experiment can be performed under required atmosphere. Since the problem of erosion of the crucible by a reactant is solved, the thermodynamic properties of the slag and the molten metal can be simultaneously researched, the obtained thermodynamic data is more accurate and reliable, and the experiment difficulty and cost are also reduced.
Owner:UNIV OF SCI & TECH BEIJING
Measuring method for high-pressure heater heat exchange pipe scour-corrosion experiment
ActiveCN1924549AReduce erosion and corrosion timeImproving Erosion Corrosion Experiment EfficiencyWeather/light/corrosion resistanceInvestigating abrasion/wear resistanceEngineeringHigh pressure
This invention relates to one high pressure heat exchanger flushing erosion testament measurement method, which is characterized by the measurement in water medium, high speed and temperature and pressure. The method comprises the following steps: firstly flushing testament point selection with speed at 1.9-4.5m / s and temperature as 180-300DEG C and pressure as 2-6MPa, pH value as 7-9.5; Measuring flushing specimen for erosion, surface film, micro organization, flushing front and back different part stress status and rough degree.
Owner:SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD +1
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