644results about How to "Convenient experiment" patented technology

A PET/MRI hybrid machine that combines a PET device with an MRI device, includes: an open PET device that has a PET field of view at least part of which is an open space accessible from outside; and an open MRI device that has an MRI field of view at least part of which is an open space accessible from outside, and the open space of the PET field of view and the open space of the MRI field of view are allowed to overlap each other at least in part. This makes it possible to simultaneously measure and image the same open space accessible from outside by the PET device and the MRI device, thereby acquiring functional information and morphological information at the same time.

The invention discloses a device for detecting the leak rate of a sealing ring. The device for detecting the leak rate of the sealing ring comprises a ring flange, a flange which is connected with the ring flange in a sealing way, and an inner sealing groove and an outer sealing groove which are arranged between the ring flange and a flange cover, wherein a sealing ring to be detected is arranged in the inner sealing groove, and a standard sealing ring is arranged in the outer sealing groove; an annular leak detection groove and a gas cavity are arranged at a contact part of the ring flange and the flange cover, and the annular leak detection groove is arranged between the outer sealing groove and the inner sealing groove and is communicated with an external leak detection pipe without leakage; and the gas cavity is arranged at the center of the flange and is communicated with a cylinder arranged outside the flange without leakage. The device has the advantages of compact structure, small volume, and convenience and quickness in heating, and the problem that the traditional detection device is difficultly applied to the detection of the leak rate of the sealing ring in high-pressure and high-temperature environments can be solved.

The invention provides a multi-state undisturbed soil column infiltration simulation system and an unsaturated osmotic coefficient determination method. The simulation system comprises a bottom member, one or more soil column experiment standard members which are connected onto the bottom member and a multi-strength rainfall infiltration device arranged at the top of the soil column experiment standard members; a soil filling member of the simulation system is composed of a plurality of standard members and is automatically controlled by a computer; the determination of a rainfall infiltration coefficient and an osmotic coefficient is realized based on the system and testing steps and a calculation method are provided; in a determination process, a large-diameter undisturbed soil column is used for an indoor experiment and the multi-strength rainfall infiltration device is used for simulating three types of strength rainfall infiltration boundary conditions, such as low-strength rainfall whole infiltration boundary condition, a middle-strength rainfall radial flowing infiltration boundary condition and a high-strength rainfall stable infiltration boundary condition; and the multi-state undisturbed soil column infiltration simulation system has the characteristics of strong practicability, good utilization effect and convenience for popularization and utilization.

The invention provides a shale compressibility comprehensive evaluation method based on uniaxial strength experiment. The method comprises the steps of (1) taking a shale core sample for executing uniaxial compressive strength test, testing an elasticity parameter, and drawing a stress-strain curve diagram; (2) calculating normalized elasticity modulus and normalized poisson ratio to obtain a brittleness index; (3) obtaining key points on the stress-strain curve, and calculating the shape index of the stress-strain curve; (4) obtaining fracture distribution diagram of the side face of the fixed sample, and calculating a fracture distribution index through box-counting dimension method; (5) measuring spallation fragment mass distribution at different scales through a screen and a balance so as to obtain a block distribution index; and (6) calculating arithmetic mean value of the obtained brittleness index, shape index of the stress-strain curve, fracture distribution index and block distribution index of fragments to get the comprehensive compressibility index. The method provided by the invention is used for evaluating fracture net forming capability of the shale after being compressed, the experiment is simple and easy to carry out, and post treatment is visual and simple, so that the method is suitable for indoor evaluation and oilfield in-site application.

This invention relates to a method to prepare mezoporous empty-centered titanium dioxide powders, which comprises following steps: titanium chloride is made into hydrosol with pure water, diluted and introduced into a spray dryer for spray drying. The subsequent product is empty-centered ball-shaped powder made up of nanosized titanium dioxide particles and the preceding titanium chloride is titanium tetrachloride or titanium trichloride. The titanium dioxide particles prepared in this invention all have mezoporous empty-centered ball-shaped structure and the empty-centered wall is made up of nanosized titanium dioxide particles and mezopores, on the surface of which titanium atoms possess a fraction of as high as 70%. As only titanium tetrachloride is adopted as precursor and no other reagent is necessary, the product is highly pure and has excellent photocatalytic properties. This method has the advantages of high yield, low cost, easily controlled technique and convenience for magnification experiment. Besides, there are not severe requirements for facilities and this method is suitable for industrial production.

The invention provides a metal plate micro-defect detection method based on nonlinear Lamb waves. The metal plate micro-defect detection method comprises the following steps of: S1, acquiring a phasevelocity frequency dispersion curve and a group velocity frequency dispersion curve of a metal plate; S2, acquiring an excitation frequency, Lamb waves of a specific mode and an incident angle of theLamb waves of the specific mode as model parameters according to the phase velocity frequency dispersion curve and the group velocity frequency dispersion curve; S3, deriving a relative nonlinear coefficient beta' according to the Lamb waves of the specific mode in the S2, wherein the relative nonlinear coefficient beta' is used for representing the depth of a defect; S4, establishing a nonlinearultrasonic test system according to the model parameters; and S5, testing the metal plate according to the nonlinear ultrasonic test system established in the step S4, judging whether the relative nonlinear coefficient beta' is reliable or not, and if so, representing the defects of the tested metal plate by utilizing the relative nonlinear coefficient beta'. According to the metal plate micro-defect detection method, the relative nonlinear coefficient beta' represents the defects of the tested metal plate, the defects of the metal plate can be effectively represented, and the detection precision is improved.

The invention discloses a wall thickness linear model-based pipe mechanical property hydro-bugling testing method, to solve the problems that the conventional pipe mechanical property hydro-bugling testing method is difficult to measure pipe wall thickness and discontinuous in experiment. The method comprises the following steps of: firstly, testing the initial wall thickness, the outer radius and the bulging area length of the pipe to be tested; secondly, putting the pipe to be tested between an upper die and a lower die, and sealing two ends of the pipe to be tested; thirdly, filling a high-pressure liquid medium into the pipe to be tested; fourthly, recording the pressure and the bulging height of the high-pressure liquid medium in the bulging process of the pipe to be tested in real time till the pipe to be tested is cracked; fifthly, measuring the wall thickness of a crack point of the pipe to be tested, and calculating and obtaining the wall thickness of each moment in the bulging process according to the wall thickness linear model; and sixthly, calculating and obtaining an equivalent stress stain curve of the pipe. The method is applied to pipe mechanical property hydro-bugling testing.

The invention provides a rainfall infiltration soil column simulation system and an unsatured hydraulic conductivity determination method. The simulation system comprises a bottom structural element, one or several soil column experiment standardized structural elements which are connected to the bottom element and are connected in series connection, and an apparatus for simulating rainfalls of a plurality of forms at the top of the soil column experiment standardized structural elements; soil containing structural elements of the simulation system comprise a plurality of standard structural elements and are automatically controlled by a computer, and determination of rainfall infiltration coefficient and unsatured hydraulic conductivity can be realized based on the system; determination steps and computing methods are provided, undistributed soil column of large diameter is used for laboratory experiment during determination, devices for simulating rainfall of a plurality forms are used for simulating four kinds of hydraulic power boundary conditions, which comprise a low intensity rainfall full infiltration boundary condition, a middle intensity rainfall infiltration with runoff boundary condition, a high intensity rainfall stable infiltration boundary condition, and a snow melt infiltration boundary condition. The system and the method have the characteristics of good practicality, good usage effects, as well as promotion and usage convenience.

The invention provides an improved method for determining free chlorine ions in cement paste or mortar and belongs to the technical field of determination of building materials. The improved method comprises the following steps: preparing a sodium chloride standard solution and a silver nitrate solution with the concentration of c; grinding the mortar in concrete until all the mortar passes through a square hole sieve with the hole diameter of 0.63mm; drying the mortar at 105+/-5 DEG C for 2 hours and recording the weight as G; adding de-ionized water; shaking and immersing; filtering and adding nitric acid into a filtering solution; inserting electrodes; connecting the two electrodes with a potentiometer; titrating by using the silver nitrate solution; recording potentials and readings of a corresponding burette; recording the volume V of silver nitrate corresponding to a titrating final point; calculating the content of the free chlorine ions in a cement slurry system according to a formula as shown in the specification; if the difference of titrating results of two times is less than 1%, finally obtaining an average value; if the difference of the titrating results of the two times is more than 1%, continuing to titrate until the difference of the titrating results of the two times is less than 1%. According to the method, the titrating final point is obvious and the accuracy is high; an experiment process is simple and convenient and is suitable for large-batch tests.

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 provides an AB test method, a system, a device and a storage medium. The method comprises the steps: constructing a plurality of experiment layers, wherein each experiment layer comprises at least one experiment; obtaining experiment configuration data of experiment configuration personnel, wherein the experiment configuration data comprises experiment flow distribution data, and theexperiment flow distribution data comprising flow proportions occupied by each experiment in each experiment layer; obtaining a user request, and distributing a target experiment to which the user request enters in each experiment layer according to the experiment flow distribution data; and distributing the user request to the target experiment in each experiment layer. By the adoption of the scheme, AB testing is conducted based on the layered experiment theory. The experiment flow of different experiment layers is orthogonally distributed. Experiment results cannot be affected. Multi-layerexperiments can be conducted at the same time, and the increasingly-large service flow requirement is met.

The invention discloses a water seepage meter and method for measuring large gap pavement structure multidirectional permeability coefficients. The water seepage meter includes an upper mold cylinder (2), a test piece (5), a middle mold cylinder (6), a lower mold cylinder (11) and a pressure measuring device. The upper mold cylinder, the middle mold cylinder and the lower mold cylinder are mainly sealed by rubber seal rings and connected in a screwed mode by screws. The pressure measuring device is mainly composed of two pressure measuring pipes, and an upper pressure measuring mouth (4) in the upper mold cylinder and a lower pressure measuring mouth (12) in the lower mold cylinder are connected with the two pressure measuring pipes respectively. The test piece is placed in the middle mold cylinder; the middle mold cylinder has two heights, namely, 63.5 mm and 100 mm, and the middle mold cylinder with the height of 63.5 mm and the middle mold cylinder with the height of 100 mm are respectively used for measuring the permeability coefficient of a single-layer asphalt mixture test piece formed by compaction molding in a room and the permeability coefficient of a multilayer asphalt mixture test piece formed by on-site pavement core-drilling and sampling. The method for measuring the large gap pavement structure multidirectional permeability coefficients is suitable for measuring the vertical permeability coefficient, horizontal permeability coefficient and comprehensive permeability coefficient of a large gap pavement structure, and the drainage performance of a drainage pavement is better evaluated.

The invention provides a testing system for measuring rock fracture multiple-phase seepage characteristics. The testing system comprises a water supply device, a gas supply device, a multiple-phase seepage work chamber, a water collection device and a gas collection device, wherein the multiple-phase seepage work chamber comprises clamping plates compressed at the two sides of a fracture sample, an inlet end cap and an outlet end cap which are arranged on a fracture on the opposite surfaces of the fracture sample respectively, the water supply device and the gas supply device are both connected with the inlet end cap, and the water collection device and the gas collection device are both connected with the outlet end cap. Compared with other molding methods (such as miniature engraving machining), the testing system has the advantages that the structure is simple, the testing system is economical and practical, and still can complete the experimental process better under less investment, the practicability is high, and the popularization and application are convenient.

The invention discloses a method for preparing a zirconium diboride coating and relates to a method for preparing a ceramic coating. The invention aims to solve the problems that a gas circuit needs to be subjected to thermal insulation treatment and the requirement of a gas flowmeter is high by adopting a method for heating ZrCl4 to be higher than a sublimation temperature and introducing the ZrCl4 into a reaction chamber through the flowmeter in the process of preparing ZrB2 through a conventional chemical vapor deposition method. The preparation method comprises the following steps: by using a double-temperature-area heating mode, by taking ZrCl4, BCl3 and H2 as source gases, by taking Ar gas or N2 as carrier gas and protective gas, preparing the zirconium diboride coating by adopting the chemical vapor deposition method. According to the method in the invention, the gas circuit needs no special thermal insulation treatment, and the flow of the ZrCl4 can be controlled through a temperature control method. The method can be used for preparing zirconium diboride coating.

The invention discloses a multifunctional portable experiment device, which mainly solves the problem that laboratory equipment cannot be widely applied as the laboratory equipment is precious and has a large size. The multifunctional portable experiment device comprises a signal generation module, a signal collection module, a universal meter module, a power supply module, a microprocessor control circuit and a communication drive circuit, wherein the microprocessor control circuit is connected with the signal generation module for generating two output analog signals; the microprocessor control circuit is connected with the signal collection module for collecting two input analog signals; the microprocessor control circuit is connected with the universal meter module for storing and processing data collected by the universal meter; the communication drive circuit is connected with the microprocessor control circuit for uploading processed data which are stored in the microprocessor control circuit to an upper computer and carrying out bidirectional communication; and the power supply module is connected with other modules for outputting direct-current stabilized voltage. According to the multifunctional portable experiment device disclosed by the invention, basic functions of instruments such as a signal source, an oscilloscope, a direct-current stabilized power supply and a universal meter can be realized.

A coffee maker with continuously adjustable water flow rate, continuously adjustable feedback-controlled water temperature, and low thermal mass allows baristas to experiment with and digitally program and/or record different flow-rate and temperature profiles (brewing profiles) over the course of brewing a cup or batch of coffee. Brewing profiles may be recorded on one machine and reproduced (played back) on another machine, allowing reproducibility of subtle flavor variations in brewed coffee.

The invention relates to an experimental platform for testing performance of a vehicle propelled by waves. The platform comprises a main frame device, a driving device and an information collector; The main frame device comprises a transparent water tank, a rack, telescoping claws, fastening bolts, guide rails, slide blocks and a winch installing plate; the driving device comprises a stepping motor, a stepping motor driver, a stepping motor installation support, a shaft coupling, winch installing supports, a winch roller, a cable and the vehicle propelled by waves; and the information collector comprises a force sensor, a wireless accelerometer and a camera. According to the experimental platform, the stepping motor driver drives the stepping motor to simulate motion of ocean waves, a winch transmits the motion to the underwater vehicle propelled by waves, the force sensor, wireless accelerometer and camera transmit obtained signals to a computer for processing, and the aim of convenient experiment is achieved.

The invention provides a method for shaping a Gaussian laser beam into a rectangular beam with uniformly distributed energy by using a polynomial freeform lens system, and application of the method. The method comprises the following steps: S1, according to the law of the conservation of energy, an energy corresponding relation of the Gaussian beam on an input plane and a rectangular light spot with uniformly distributed energy on an output plane is built; S2, the mapping function relation of the beams on the input plane and the output plane is obtained; and S3, a polynomial freeform equation of a lens is selected, based on the mapping function relation of the beams on the input plane and the output plane, optical design software is utilized for optimizing the coefficient of the polynomial freeform equation, and after the Gaussian beam on the input plane passes through the polynomial freeform lens system, the Gaussian beam is shaped into the rectangular light spot with uniformly distributed energy on the output plane. According to the method provided by the invention, a rectangular laser light spot with uniformly distributed energy can be obtained, and meanwhile, the method can be applied to tests and research needing to use the rectangular uniform laser light spot, for example, the research and industrial production of laser pulse shot blasting strengthening and forming which need a square uniform laser light spot.

Two-dimensional tungsten disulfide is a new type of graphene-like two-dimensional material, which has great application potential in electrical devices, energy, biology and composite materials. The methods for preparing two-dimensional tungsten disulfide include mechanical exfoliation, electrochemical lithium ion intercalation method, and liquid phase exfoliation method. Hydrothermal method and chemical vapor deposition method, etc. Among them, chemical vapor deposition method has the advantages of controllable size and layer number and high crystal quality of materials when preparing two-dimensional tungsten disulfide. At present, there are few studies on the preparation of tungsten disulfide by CVD. The size of two-dimensional tungsten disulfide prepared in the existing reports is only tens to one hundred microns, which cannot achieve the purpose of controlled growth. This patent revolves around the chemical vapor deposition method and improves the growth process, so that the growth process no longer needs vacuum and low pressure conditions, and can be carried out under normal pressure. A simple single-temperature zone tube furnace can be used to grow high-quality tubes, making the experimental process It is simpler, the cost of the experiment is greatly reduced, and the controllability of the experimental preparation is improved.

The invention discloses a method used for identidying material anisotropic plasticity parameters based on spherical impression morphology. According to the method, a spherical impression equipment isadopted for indentation test of a test piece so as to obtain impression morphology response information left on test piece surface; orthogonal decomposition and parametric approximation are adopted soas to obtain a value model used for representing the relationship of the material anisotropic plasticity mechanical property parameters with the impression morphology response information, reverse derivation constraint optimization problem is adopted so as to obtain the anisotropic plasticity mechanical property parameters of the material to be test through reverse derivation. In applications, the spherical impression morphology information obtained in the indentation experiment is input into the value model, and the anisotropic plasticity mechanical property parameters of the material to betest are obtained through certain steps of calculation. The method can be used in anisotropic material small size sample detection, nondestructive test, and material in-suit test, and the accuracy ofmaterial anisotropic plasticity parameters obtained via reverse derivation using the method is high.

The invention relates to a high temperature and high pressure multiphase fluid comprehensive tester, which comprises a fluid storage and output system, a high temperature and high pressure simulation system, a fluid solubility analysis and testing system, a sampler, a data collector and a computer host machine, wherein a reaction chamber is arranged in the high temperature and high pressure simulation system, the fluid storage and output system is communicated to a gas inlet, the communicated pipeline is provided with a gas mass and flow rate meter, the gas mass and flow rate meter is sequentially connected to the data collector and the computer host machine, the high temperature and high pressure simulation system is provided with a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor are respectively connected to the data collector, the sampler is used for sampling a fluid to be detected in the reaction chamber, and the fluid to be detected can be subjected to solubility analysis and testing in the fluid solubility analysis and testing system. According to the present invention, the high temperature and high pressure multiphase fluid comprehensive tester has advantages of simple structure, high test precision, controlled experiment temperature, controlled experiment pressure and controlled experiment volume, can stably work for a long time under the high temperature and high pressure conditions, and is used for the accurate testing of the fluid phase, the fluid property and the solubility.

The invention relates to an aviation polarization multi-spectrum image registration method, which comprises the following steps of: selecting an image as a reference image from collected original polarization multispectral aerial remote sensing images, according to the hole imaging geometric model, calculating the coordinates of the imaging optical center of a measurement image in the imaging coordinate system of the measurement image and the coordinates of the imaging optical center of a reference image in the imaging coordinate system of the reference image; calculating the coordinates rotation matrix and the translation vector of the imaging coordinates system of the measurement image to the imaging coordinates system of the reference image; calculating the coordinates (u'T, v'T) of the imaging optical center in the imaging plane coordinate system of the reference image; rotating the measurement image around the imaging optical center according to a rotation matrix to ensure that the imaging optical center of the measurement image after rotation is coincide with the imaging optical center of the reference image; and cutting boundary parts of the measurement image beyond the reference image to obtain a registration result. The invention has the advantage that the content of the images does not need to be considered in the process of registration. Besides, the invention is rapid and simple to realize.