22 results about "Experimental methods" patented technology

The invention discloses a method for preparing a single-layer tungsten diselenide nanoband based on a space confinement strategy. By changing the flow and the growth time of hydrogen, effective control on the width and the thickness of a nanoband can be realized. The method comprises the following steps: uniformly spraying tungsten trioxide powder to one substrate, then covering the substrate by the other substrate, and forming micro reaction space which is of a 'sandwich'-like structure. Growth of a tungsten diselenide nanoband is carried out by utilizing a constant-pressure chemical vapor deposition method; physicochemical characteristics of a one-dimensional transition metal chalcogenide strongly depend on suspension key types on the edge of the one-dimensional transition metal chalcogenide, metallic properties are displayed by an ultranarrow band, and conversion from the metallic properties to semiconductor properties can be displayed from the edge to the center of a wider band; the tungsten diselenide nanoband is widely applied to micro-nano photoelectric devices due to the special property; industrial production of the tungsten diselenide nanoband can be realized through an experimental method of the invention.

This invention belongs to the field of reactor structural mechanics technology, specifically relating to a method for analyzing and evaluating high-temperature bolted connection sealing structures. The invention includes the following steps: selecting the location of the reactor pressure vessel flange and main bolt connection as the object of sealing structure analysis; analyzing and summarizing the influence of gasket data on the deformation and contact surface pressure of various components of the flange bolted connection structure; researching current standards and analyzing their limitations; using the finite element software ANSYS to perform finite element modeling of the reactor pressure vessel flange and main bolt structure; applying loads and constraints to the finite element model of the reactor pressure vessel flange and main bolt structure; calculating the deformation and stress of the structure using different creep and relaxation models; analyzing the relaxation behavior of the high-temperature flange bolted connection structure using experimental methods; and comparing and analyzing the results of the finite element method, the standard method, and the experimental method. This invention enables the analysis and evaluation of the sealing performance of flange bolted connection structures under high-temperature environments.

The application discloses a drainage pipe network hydraulics experimental method and system based on double-branch dynamic coupling, belongs to the technical field of water conservancy projects, and comprises the following steps: a double-branch double-gradient dynamic coupling simulation device is built, four types of visual simulation experiments such as pipe network intersection flow state analysis are carried out, and data are collected; after the data are preprocessed, a critical blockage flow prediction model is established, a four-dimensional model is constructed in combination with historical data of a city drainage pipe network to train and iterate the four-dimensional model; field data are collected in real time to input the model for prediction, and the pipe network is controlled in real time according to the results and the model is continuously updated. The system comprises experimental simulation, model establishment, model training and comprehensive control modules. The application realizes multi-parameter dynamic collaborative control, constructs a multi-dimensional accurate measurement system, has the advantages of modularity and water cycle, realizes prediction control integration, provides an active prevention and control means for safe operation of the drainage pipe network, and is suitable for visual research on the hydraulic characteristics of the pipe network.

The application provides a cold-bending glass performance verification experiment method and experiment tool, and aims to solve the technical problems of poor adaptability, great safety hazards, incomplete data collection and imperfect verification system in the existing cold-bending glass experiment. The experiment method comprises the following steps: selecting a test piece, a general step, fixing a detection unit frame corresponding to the glass test piece on the experiment tool, placing the glass test piece and setting rubber pads, adjusting the plane of the glass test piece to be horizontal by using a level, performing a first all-around three-dimensional scanning on the glass test piece and recording the data of the original state of the glass; measuring point arrangement, gradually pressurizing through an electric loading device and the experiment tool, correcting the finite element analysis result, and the experiment tool comprises two supporting cross beams and two supporting vertical beams, which can verify the stress state, deformation characteristics, long-term use performance and durability of the cold-bending glass, and provide a scientific basis for the design, production and on-site installation of the cold-bending glass curtain wall.

The application discloses a kind of multilayer superimposed rock sample layering fracturing experimental methods, device, equipment and medium.The method comprises: obtaining basic rock material for fracturing experiment, and constructing initial multilayer superimposed rock sample according to basic rock material.Initial multilayer superimposed rock sample is subjected to fracturing preparation treatment, and target multilayer superimposed rock sample is obtained.Based on true triaxial fracturing experimental device, fracturing fluid injection is carried out to target multilayer superimposed rock sample, and layering fracturing experiment is carried out to target multilayer superimposed rock sample.In the case where preset end condition is met and according to CT scanning reconstruction technology, crack characteristic analysis is carried out to target multilayer superimposed rock sample, and crack distribution information is determined.The technical scheme of the present application can effectively simulate the real process of multilayer reservoir crack propagation, and can also reveal the action mechanism of different lithology interfaces in crack formation and propagation, greatly improving the accuracy and reliability of crack propagation mechanism research.

The application provides an experimental device and method for fracture three-dimensional stress interference visualization. The experimental device comprises: a photoelastic experimental mechanism for visualizing a stress field of an experimental sample; a three-way stress loading mechanism arranged at an observation position of the photoelastic experimental mechanism and used for loading three axial stresses on the experimental sample; and a light source direction clamping mechanism comprising two numerical control hydraulic clamping assemblies symmetrically arranged on two sides of a light source direction of the experimental sample, and the two numerical control hydraulic clamping assemblies are matched to maintain stress loading on the experimental sample in the light source direction. The experimental method adopts the experimental device for fracture three-dimensional stress interference visualization. The application has the beneficial effects of enabling indoor experimental research on stress distribution and stress interference of a stratum under three axial stress conditions.

The application discloses a passive maintenance-free anti-floating experiment simulation device and an experiment method, and relates to the technical field of anti-floating design, and can be used for verifying a passive anti-floating design structure, designing parameters and calculating an anti-floating limit water level.

The application belongs to the technical field of oil and gas field development, and relates to a method for simulating phase state change of a plugging agent under high temperature and high pressure conditions, which comprises the following steps: providing a simulation experiment system; preparing an experimental sample; preparing the simulation experiment system; loading the experimental sample in the simulation experiment system; setting experimental parameters of the simulation experiment system; and collecting experimental data of the simulation experiment system. The method for simulating phase state change of the plugging agent under high temperature and high pressure conditions can realize real-time dynamic observation of phase state change of the plugging agent, and is helpful for in-depth understanding of physical and chemical change processes of the plugging agent under extreme conditions.

A method for generating process parameters includes the following steps. Process parameters and upper limits and lower limits corresponding to the process parameters are established. Multiple sets of test parameters corresponding to the process parameters are established using an experimental planning method. Multiple optimization targets corresponding to the sets of test parameters are established using an experimental simulation method or using an experiment based on process design and the sets of test parameters. A set of optimized process parameters and an optimization target corresponding to the set of optimized process parameters are calculated using an optimization algorithm with the sets of test parameters as training parameters.

The application discloses a kind of dynamic adhesion performance test experimental platform and experimental method, belong to adhesion performance test technical field.Experiment platform is by mobile platform, launching device, adhesion device and acquisition device composition, using adjustable cylinder as launching device to provide certain speed to the adhesion unit of loading counterweight, make it linear motion on low friction slide rail, finally with adhesion target fixed in the end of slide rail occurs adhesion.In the whole experiment process, the speed and acceleration of adhesion unit in the whole process, the contact force in the adhesion process and the change of adhesion area are obtained by laser displacement sensor, force sensor and high-speed camera, and then the dynamic adhesion performance of adhesion unit is obtained and its performance is evaluated.The experimental platform can synchronize triggering of two sensors and high-speed camera, and synchronize the collected signals to obtain more accurate and comprehensive dynamic adhesion performance of adhesion unit.

The application discloses an experimental method and system for testing the dissolution degree of a fracture surface. A plurality of homologous core samples are obtained from the same geological unit and a standardized reaction surface is prepared; initial physical property parameters are obtained; at least two samples are placed in a closed reaction environment simulating reservoir temperature and pressure and fluid flow conditions for dynamic dissolution experiments; at a plurality of preset time nodes, the reacted samples are sequentially taken out for destructive testing under the premise of ensuring the continuity of the thermodynamic and hydrodynamic states of the reaction system, and morphology and mechanical property evolution data are obtained; meanwhile, the outflow is continuously collected according to the period to analyze the element content change; the initial physical property parameters, the time-series mechanical property evolution data and the time-series chemical element release data are integrated to establish a quantitative dynamic correlation model between the dissolution degree of the fracture surface and the mechanical property evolution. The application realizes high-fidelity comprehensive evaluation of the dissolution evolution law of the fracture surface, and provides key data support for the optimization of the fracturing process and the safety evaluation of CO2 storage.

This invention belongs to the technical field of geomembrane defect leakage detection. To address the problem that existing methods cannot simulate and quantitatively study the coupling mechanism between the electrical shielding effect of geomembranes and reservoir water load and defect leakage, this invention proposes a geomembrane leakage simulation experiment method and apparatus. Water is injected into the simulation apparatus to adjust the experimental water layer to the first target water level. Drainage is then initiated to achieve dynamic equilibrium of the seepage field in the simulation apparatus. Under stable conditions, apparent resistivity data at the first target water level are collected based on the ground high-density resistivity method and the water surface high-density resistivity method. After changing the experimental variables and reaching a new steady state, corresponding apparent resistivity data are collected. The collected apparent resistivity data under different experimental conditions are then compared and analyzed to explore the geomembrane electrical shielding effect, the influence of reservoir water load, or the defect leakage response mechanism.

The application relates to the technical field of geological research, in particular to a diagonal compression-torsion experimental device for geological research and an experimental method thereof. The diagonal compression-torsion experimental device for geological research and the experimental method thereof are characterized in that the geological conditions in a target range are simulated according to the arrangement of a thin plate, a baffle and a base model according to the geological conditions in a simulated stratum, the geological movement is simulated according to the pulling of the thin plate in the actual geological movement process, and the change process is recorded after the simulated soil layer on the surface is fractured along with the movement of the thin plate. The diagonal compression-torsion experimental device for geological research and the experimental method thereof are characterized in that the geological conditions in a simulated region are simulated through a left thin plate, a right thin plate and a base model, the geological movement conditions are simulated according to the pulling of the thin plate according to the movement direction of the stratum, and the fracture conditions and the change process of the simulated soil layer are observed and recorded, so that effective data support is provided for the research on the formation process and the reason of the fracture zone.

An experimental method for low-high temperature hatching stimulation and dual-high temperature tolerance threshold determination for schizothoracine fish eggs in high diurnal temperature variation waters includes: step 1, determining daily extreme water temperatures and a daily water temperature variation during natural incubation of the schizothoracine fish eggs; step 2, implementing an incubation water temperature with the daily water temperature variation; step 3, determining a key hatching water temperature; step 4, inducing mass hatching of the schizothoracine embryos; and step 5, determining temperature tolerance thresholds. Through indoor water temperature gradient experiments on the schizothoracine fish eggs, a hatching mechanism under low-high temperature stimulation for fertilized eggs of Schizopygopsis microcephalus in Yangtze River source, and dual-high temperature tolerance ranges and thresholds. This provides scientific support for the protection and restoration of fishery resources in the Yangtze River source under the background of global warming.

To address the limitations of traditional orthogonal experimental methods, which rely on experience and have limited parameter search capabilities, and response surface methodology, which is heavily reliant on the number of finite element simulation samples and has high computational costs, in optimizing the structural parameters of a six-dimensional force sensor elastomer, this invention proposes a method for optimizing the structural parameters of a six-dimensional force sensor elastomer based on a physical information neural network. The technical approach involves: taking the six-dimensional force sensor elastomer structure as the research object, selecting the length of the floating beam, the length of the strain beam, the width of the floating beam, the width of the strain beam, and the beam thickness as design variables; constructing multiple combinations of structural dimensions through orthogonal experiments, and obtaining the strain response data corresponding to each dimension combination using finite element analysis; establishing an elastomer mechanical model, and introducing the constitutive relations, governing equations, and boundary conditions of the mechanical model as physical constraints into the neural network training process; simultaneously using finite element strain data to supervise and correct the network, thereby constructing a high-precision mapping model between structural parameters and strain response; and further combining this mapping model with a multi-objective genetic algorithm (NSGA-III) to optimize the search for the elastomer structural parameters. This invention reduces the requirement for finite element simulation samples while achieving high-precision prediction of the mechanical response of the elastomer structure, significantly improving the efficiency of structural parameter optimization.

The invention discloses a visual experimental device, system and experimental method for conventional triaxial hydraulic fracturing, which can simulate and visualize the triaxial hydraulic fracturing process under controllable conditions by applying confining pressure and axial stress to an experimental sample and injecting fracturing fluid to simulate fracturing, thereby improving the predictability and efficiency of field operation. A radioisotope tracer detection imaging technology is used for monitoring the crack expansion process in real time, direct crack dynamic data are provided through comprehensive and real-time monitoring of a radioactivity detection probe and a detection imaging system, rock responses under different fracturing parameters can be predicted, and therefore a fracturing scheme with the highest cost benefit is selected; according to the invention, the formation and expansion of cracks in the experimental rock sample can be comprehensively observed in real time; the device is suitable for the industries of rock mechanics and petroleum engineering, and is used for simulating and monitoring the cracking and crack propagation process of experimental rock samples.

The application provides an experimental device and method for multi-crack stress distribution visualization. The experimental device comprises a photoelastic experimental mechanism, a three-way stress loading mechanism, a horizontal stress clamping mechanism and a crack body internal pressure maintaining mechanism. The horizontal stress clamping mechanism adopts four numerical control hydraulic clamping components which are uniformly distributed around the experimental specimen to maintain stress loading of the experimental specimen in two mutually perpendicular horizontal directions. The crack body internal pressure maintaining mechanism can maintain the internal pressure in the cracks of the experimental specimen. The experimental method adopts the experimental device for multi-crack stress distribution visualization to carry out experiments. The beneficial effects of the application include: the stress distribution and stress interference of multiple cracks under the conditions of triaxial stress and internal pressure in the cracks can be realized in indoor experimental research.

The application discloses a kind of multi-class diapir structure supergravity physical simulation experimental device and experimental method.Test area bottom plate and base plate are connected by base, test area shell is set on test area bottom plate, diapir core material injection system is installed on base plate, test area shell is the frame surrounded by side wall board and curved surface table, removable rigid partition can divide into three sub-test areas, the bottom of each sub-test area has a material injection port, each corresponds a set of independent material injection system, movable piston is arranged in material injection system, drive system can control the injection rate of material, method includes selecting simulation material, injecting simulation material into material cavity, setting test model in test area, monitoring the deformation of test model to simulate geological structure deformation process.The application can carry out simulation research on single diapir structure and diapir group structure, test the repeatability of diapir structure supergravity simulation test results, and can significantly reduce experimental error.

This invention discloses a Z-shaped maze device and experimental method for directional physical field exposure experiments, relating to the field of biomedical engineering technology. The device includes a box containing a maze area and an open field area. Multiple parallel partitions are arranged within the maze area, alternately connected to the inner walls of opposite sides of the box, with gaps maintained between the ends of the partitions and adjacent inner walls. These gaps, along with the space between adjacent partitions, constitute the passageway for the experimental animal. The width of the passageway is designed according to the principle of "allowing only unidirectional passage for the experimental animal, preventing it from turning around within the passageway." The end of the passageway connects to the open field area. This invention achieves, for the first time, precise and coordinated control of the animal's position and directional physical field parameters throughout the entire process in an unrestrained state. It can comprehensively cover all parameter research scenarios for all types of directional physical fields. It has strong universality and flexibility, enabling simultaneous acquisition of multi-dimensional behavioral indicators. The experimental process is standardized.

The application discloses a birefringent device multi-dimensional experiment device and experiment method, which takes birefringent material in a birefringent device in the shape of a parallelepiped as an experiment object; the birefringent material produces birefringence on incident light, and emits ordinary light and extraordinary light, the directions of the two beams of emitted light are parallel, and the polarization directions are perpendicular to each other; the experiment device emits specific types of incident light aiming at the birefringent device, detects the direction, intensity and polarization direction of the ordinary light and the extraordinary light emitted by the birefringent device, and completes multi-dimensional experiments. The application is based on simultaneously tracking an optical path and monitoring the polarization state of emitted light to implement research on multiple influencing factors of the birefringent device, and is suitable for teaching demonstration and research experiments due to low cost.

This invention provides an experimental method and system combining robot programming control and industrial assembly simulation. The method includes: constructing an industrial assembly scenario library by classifying different scenarios and corresponding assembly and programming tasks; building an experimental platform supporting multiple learning stages and scenarios through local large-scale model deployment, programming mode configuration, and collaborative rule settings; executing programming control and real-time simulation for industrial assembly based on the industrial assembly scenario library and experimental platform; collecting and analyzing multimodal experimental data in real time during the execution of programming control and real-time simulation; and generating experimental evaluations and optimization suggestions based on the analysis results. This invention enhances the practicality of teaching; utilizes a local large-scale model to achieve real-time feedback and error warnings, ensuring operational safety and improving teaching efficiency; and through a multi-dimensional evaluation system, helps teachers accurately grasp student learning progress, promoting the standardization and personalization of programming control and assembly simulation in the industrial field.