122results about How to "Reduce experiment costs" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.