214results about How to "Accurate research" patented technology

The invention provides a method of predicting reservoir fractures based on offset vector tile seismic pre-stack gather data. The reservoir fracture development density and fracture azimuth are directly inverted based on offset vector tile seismic data containing azimuth information. The defects of the conventional narrow-azimuth pre-stack seismic fracture prediction technology, such as low inversion accuracy and low spatial resolution, are overcome. More comprehensive and complete offset and azimuth information can be retained. More suitable seismic data is provided for azimuth anisotropy research. The method is more advantageous to the identification of fault, fracture and reservoir air water variation characteristics.

The invention discloses a physical simulation test system for a subsea production facility hydraulic control system. The physical simulation test system comprises a hydraulic power station, a hyperbaric cabin, an oil supply umbilical pipe, a subsea distribution module, a subsea control module, an actuator module, an oil return umbilical pipe, and a hyperbaric cabin oil return pipe, wherein the hydraulic power station is connected with the hyperbaric cabin and the oil supply umbilical pipe through a hyperbaric cabin oil supply pipe respectively; the oil supply umbilical pipe is connected with an inlet of the subsea distribution module; an outlet of the subsea distribution module is connected with the subsea control module and the actuator module respectively; the actuator module is connected with the oil return umbilical pipe which is connected with the hyperbaric cabin oil return pipe; the hyperbaric cabin oil return pipe is connected with the hydraulic power station; and parts are connected so as to form the physical simulation test system for the hydraulic control system. By a test platform of the subsea production facility hydraulic control system, the simulation and research of the whole subsea hydraulic control system in the actual engineering can be accurately finished.

The invention discloses a plant rhizosphere box and the application thereof in the micro-domain research of wet land plant rhizosphere. The plant rhizosphere box comprises a box body, the inside space of the box body is partitioned into a root zone, a near root zone, a far root zone and a non-root zone and other different rhizosphere micro-domain partition zones by a number of rhizosphere partition plugging plates, water distribution units are arranged on the upper part of the box body, and water level regulating units are also arranged on the box body; and a water discharging device is arranged on the bottom of the box body. Through the adjustment of the intervals between the different rhizosphere micro-domain partition zones, the accurate observation and the research of the differentiation changes of different distances from the root system, and/or root zone soil, and/or interval water nutrients, pollutant, and/or microorganism are achieved. Based on the plant rhizosphere box, water flooded habitat of plants grown in wet land can truly be simulated, so that water flow conditions in the substrate can be maintained, and different water pressure retention time and water levels are arranged according to the needs, and the plant rhizosphere box has wide application prospect in plants, especially in the micro-domain research of wet land plant rhizosphere.

The invention discloses a rock tensile strength test apparatus capable of applying confining pressure, which can truly restore an environment in which rock is disposed. The rock tensile strength test apparatus comprises a base, wherein the base is connected with a top plate by virtue of a connecting rod; and the base is fixedly provided with a test assembly, the top plate is fixedly provided with a loading oil cylinder, and a loading rod of the loading oil cylinder stretches into the test assembly. By adopting the rock tensile strength test apparatus, the confining pressure, different temperature environments and rock burst can be applied to a test sample, an underground environmental condition of the rock can be truly simulated, so that an underground stress condition of the rock and the variation of tensile strength can be more precisely researched, and instructions and references can be provided for the subsequent design, construction, teaching, research and the like. By adopting the rock tensile strength test apparatus, the test sample can be rapidly centered, and a breaking time and pressure at the breaking time of the test sample can be discovered in time by virtue of a displacement of the loading rod. By virtue of a cooling assembly, heat of the loading rod and a lower supporting rod can be prevented from damaging the test apparatus.

A consumer behavior information collecting system is provided which is capable of easily and widely collecting information about positions of consumers. A portable terminal transmits position information to an information management center. The information management center accumulates received position information and increases the number of points being kept by a user based on frequency of transmission of position information and presents information about merchandise that corresponds to the number of points being kept by the user and meets conditions set by the user. The information management center, when having received merchandise selected information from a portable terminal, determines supply of requested merchandise in consideration of the number of points, performs specified statistical processing according to accumulated position information and corresponding time information and personal information of the user, and produces behavior information to be used for marketing research and a like.

The invention provides a simulation modeling method for a composite flight strategy of a flapping wing air vehicle. The method comprises following steps: obtaining basic parameters of a flapping wing air vehicle under study; establishing an aero-dynamic model; establishing a dynamic model; describing composite flight process; establishing the relation between flight power and flapping power and flapping amplitude to obtain a flight energy consumption calculation model; establishing a control rate model; linking and sorting the aero-dynamic model, the dynamic model, a composite flight planning model, the flight energy consumption calculation model and the control rate model to establishing a final simulation model. The advantages of the method are: simulation technicists can efficiently use the Matlab/Simulink simulation environment to establish a composite flight simulation model of a flapping wing air vehicle and determine composite flight ability of the flapping wing are vehicle through analyzing simulation results of different flight strategies, and find an optimal flight strategy; the method is of instructive importance to flapping wing air vehicle engineering improvement.

The invention relates to a high-speed train-tunnel aerodynamic characteristic movable model experiment system which comprises an air cannon launching device (6), a train model (1), a tunnel model (2) and a guide rail (3) in the tunnel model (2); the section of the cannon tube (4) of the air cannon launching device (6) is in the shape of a gate arch, the shape of the bottom (3') thereof is the same with the shape of the guide rail (3) in the tunnel model (2), and the bottom (3') and the guide rail (3) in the tunnel model (2) are connected into an integrated structure; and the section of the guide rail (3) is in an I-shaped structure, the middle at the bottom of the train model (1) is matched with the I-shaped structure of the guide rail (3), and the train model (1) is embedded on the guide rail (3) in a sliding mode. Through the system, the train model stably runs on the guide rail, the train model has large size and is more approximate to the real state of train running, and the aerodynamic characteristic of a train running in a tunnel can be better simulated and researched.

The invention relates to a weak power grid source load impedance model analysis method of a grid-connected power generation system, and relates to the technical field of power grids. The technical problem that the existing method is not suitable for a weak power grid is solved. The method comprises the steps that a grid source load impedance model is defined for the grid-connected power generation system, wherein the model is combined with grid-connected inverter common coupling point voltage, alternating current power grid line impedance, alternating current power grid load impedance, alternating current power grid equivalent voltage, alternating current power grid equivalent current source and alternating current power grid access current of the grid-connected power generation system; the assumption that the load of an alternating current power grid is a resistive inductive load and the line impedance of the alternating current power grid is resistive inductive line impedance is carried out, so that an open-loop transfer function and a closed-loop transfer function of the grid-connected power generation system under double-loop control are acquired; and according to the acquired open-loop transfer function and the closed-loop transfer function, the grid-connected power generation system is analyzed. The method provided by the invention is suitable for analyzing the grid-connected power generation system under the weak power grid.

The invention relates to a model test device for simulating a jacked pile driving process. The model test device comprises a hand-operated chain-type static penetrometer, a model box, a hill-shaped plate, a pad pressing plate, an iron rod, a pressure sensor, a model pile and a positioning and guiding component, wherein the hand-operated chain-type static penetrometer is fixed at the top of the model box; the hill-shaped plate is fixed on a chain of the hand-operated chain-type static penetrometer; the pad pressing plate is padded under the hill-shaped plate; the iron rod extends into the hand-operated chain-type static penetrometer from the top, and passes through the hill-shaped plate and the pad pressing plate in sequence; the lower end of the iron rod is connected with the pressure sensor; the model pile is arranged under the pressure sensor; and the positioning and guiding component is used for fixing the model pile to ensure that the model pile vertically passes through the bottom of the hand-operated chain-type static penetrometer and extends into the model box. Compared with the prior art, the model test device has the advantages that jacked piles can continuously penetrate into soil, and the pile driving rate is controllable.

The invention relates to a system and a method for realizing synchronous control of multiple targets in a detonation experiment test system. The system comprises a shock tube, a premixed gas supply system, a flame retardant injection system, a flame signal acquisition system, a pressure signal acquisition system, a data acquisition system, a laser schlieren system, a high-pressure ignition systemand a synchronous control system for controlling the systems, the shock tube comprises a plurality of experiment pipelines and a visual observation window experiment section which are connected in sequence; the premixed gas supply system is communicated with the interior of the shock tube to generate premixed gas with a preset equivalence ratio and input the premixed gas into the shock tube; the flame retardant spraying system is connected with the visual observation window experiment section; the flame signal acquisition system and the pressure signal acquisition system are arranged on the side wall of each section of experiment pipeline; the laser schlieren system is used for measuring distribution images of typical free radical concentration and temperature of the deflagration flow field; the high-pressure ignition system is connected with the end of the shock tube and used for ignition. The system and the method can be widely applied to the field of safety science and technology.

The invention relates to a method of measuring and evaluating land use rate, in particular to a land use mixing degree evaluation method based on land use compatibility. The method includes: 1, determining cell dimensions and determining dimensions of square cells according to land area of an analytic object; 2, laying out the cells, expanding the cells to cover an area of residential plagues by using centers-of-gravity of the residential plagues as centers of the cells; 3, determining an analysis unit, and providing different plague definition rules for residential lands and industrial warehousing lands; 4, assigning the cells; 5, calculating MDI (mixing degree indexes), and comparing values of the MDI to a probable theoretical maximum to achieve mixing degree evaluation. Land use mixing degree of a region and merits of residential environment quality are judged by calculating the mixing degree indexes, so that land use mixing degree evaluation is not qualified but quantitated and valuable reference information can be provided for the planning and decision of urban land use.

The invention discloses a root box experiment device for plant root environment research. The device comprises a front baffle, a rear baffle, a U-shaped root separating plate, a nylon net, a soil water collecting pipe, a water-holding base, a fastening screw, an air vent and a water inlet, wherein the nylon net is attached to the surface of the U-shaped root separating plate; the U-shaped root separating plate and the nylon net are located between the front baffle and the rear baffle and are fixed by the fastening screw; a soil water collecting hole is formed at a lateral edge of the U-shaped root separating plate; the water-holding base is located at the bottom. According to the invention, each separating plate and the water-holding base of the root box experiment device both are detachable and reusable, so that the technical problem of collecting the soil sample and soil water sample in the plant root environment research can be solved; a collecting method for millimeter-scale root tiny-region soil and soil water in different regions can be further simplified and accurate; the research on differential characteristics on different positions of the root system of the crop is benefited; the further accurate research on the root soil interface behavior is benefited.

The invention discloses a full three-dimensional simulation method for an acidification flow experiment. According to the method, a differential method is utilized to discrete a fluid seepage continuity equation and an acid-liquid mass diffusion reaction equation, and an H+ local equilibrium equation, a porosity change equation, a permeability change equation and a pore throat radius change equation are established at the same time; initial conditions and boundary conditions are substituted into the simulation equations; a simulation program is compiled by utilizing the equations, the initialconditions and the boundary conditions; 6, reservoir cores are scanned to obtain three-dimensional spatial distribution parameters of porosity; a three-dimensional spatial distribution model of the porosity is established, and the compiled program is utilized to achieve full three-dimensional numerical simulation of the acidification flow experiment on the basis of the established three-dimensional spatial distribution model of the porosity. According to the method, full three-dimensional numerical calculation is adopted, the calculation precision is effectively improved, and meanwhile the influence laws of each parameter on the development of wormholes are conveniently, quickly and accurately studied.

The invention discloses a method for researching high Rayleigh number fusion pool heat transfer characteristics by a moving particle finite volume method. The method comprises the following main stepsthat: 1: carrying out particle modeling by aiming at a specific problem, and setting a particle initial layout; 2: according to the position of each particle, dividing a grid; 3: after a time step length [Delta]t, using the finite volume method to solve an energy equation; 4: through a particle method, processing a viscosity term and a source term in an explicit calculation momentum equation, andestimating the speed and the position of the particle; 5: calculating particle number density, and solving a pressure Poisson equation; 6: calculating the correction value of the speed, and calculating the speed and the position of each particle in a next time level; and 7: outputting a calculation result, and according to a solved specific problem, outputting wall surface heat flux density and the phase state of substances in a fusion pool. The method has the advantages that a free liquid surface is accurately captured by a particle method and a phase change problem is simulated, and calculation accuracy is high. Through the method, the high Rayleigh number fusion pool heat transfer characteristics are researched, and an important basis is provided for researching the safety characteristics of the serious accident of a nuclear power plant reactor.

The invention discloses a spatial and temporal evaluation method for distribution and driving force of mountain torrent disasters in a super-large area, and the method comprises the steps: 1, dividinga drainage basin, and determining a research area and an analysis time period; step 2, carrying out spatial partitioning on the research area; 3, constructing a rainfall driving factor, a surface environment driving factor and a human activity driving factor, and performing driving force analysis; 4, analyzing continuous factors of the rainfall driving factor, the earth surface environment driving factor and the human activity driving factor by adopting a geographic detector; and 5, converting the mountain torrent disaster point data into continuously distributed fishing net surfaces by adopting a hot spot analysis method, and then calculating disaster intensity of each drainage basin by utilizing an area weight method to obtain spatial partitions of mountain torrent disasters. Accordingto the method, the driving factors of the spatial and temporal distribution pattern of the mountain torrent disasters are quantitatively analyzed by utilizing the geographical detector, so that influence of each driving factor is more credible, and the evaluation result is more real.

The invention relates to a method for identifying pathogenicity of sesame stem blight and blast pathogenic bacteria. The method comprises the following steps of: (1) culturing bacterial strains for inoculation; (2) pretreating seeds, namely selecting healthy and full sesame seeds and sterilizing for later use; (3) inoculating, namely adding a sterilization culture medium into a culture bottle, laying down sterile filter paper, adding sterile water, removing bubbles, uniformly placing sesame sterile seeds along the edges of the filter paper, inoculating bacterium cakes in the center of the filter paper, and hermetically culturing in the dark; (4) investigating pathogenicity, namely dividing the pathogenic conditions into different pathogenic grades according to pathogenic degrees; and (5) evaluating the pathogenicity, wherein the pathogenic index is equal to Sigma (pathogenic grade*corresponding pathogenic bud number)/total bud number. The method is simple and convenient and practicable, the required equipment is few, the result is reliable, and the pathogenicity of different sesame stem blight pathogenic bacteria and blast pathogenic bacteria can be reflected more accurately.

The invention discloses an integrated detection system for thermal performance of a lower-medium vacuum compound insulation pipeline and application of the integrated detection system. The integrated detection system is composed of a control and data acquisition system, a conduction oil circulating system and a constant temperature chamber, wherein the control and data acquisition system is used for acquiring data including the temperature, the output power of an electric heater, the heat flow and the like on one hand, and controlling the temperature of a working steel tube, adjusting the output power of the electric heater and controlling the pressure of a vacuum layer on the other hand; the conduction oil circulating system is used for providing conduction oil of a certain temperature for a test tube section; the constant temperature chamber is used for keeping the temperature of the test tube section in a certain range. The integrated detection system disclosed by the invention has the beneficial effects that: the parameters including the temperature, the output power of the electric heater and the heat flow and the like can be automatically recorded and controlled; and the test result is accurate and high in reliability, which is helpful for research on a heat-transfer mechanism of the insulation pipeline.

The invention provides a method for evaluating vacuum plume effect on basis of mutual coupling of experiment and simulation and aims to quickly and accurately evaluating the vacuum plume effect in rocket engines. The method includes: performing simulation aided experimental design, to be specific, performing initial simulation to determine typical experimental conditions and key measurement parameters; confirming experimental effectiveness, to be specific, comparing experimental data of an experimental process with initial simulation results, and judging the effectiveness; confirming method effectiveness, to be specific, after confirming experimental effectiveness, subjecting a simulation method to verification and correction to allow sufficient precision; computing popularization of the simulation method, to be specific, subjecting all conditions of a plume effect task to be analyzed to simulation computation by the simulation method verified. The method has the advantages that various specific analytical problems about the engine vacuum plume effect can be studied and evaluated quickly, efficiently and accurately, reasonableness of experimental design can be effectively guaranteed, fewer experiment times are required, and experiment cost is lowered.

The invention belongs to the technical field of power equipment aging tests, and discloses a GIS solid insulation multi-sample three-factor aging test device and test method. The device comprises a test box and a sample support, wherein the sample support is arranged in the test box, the test box is used for providing a test environment, and the sample support is used for loading a sample; the device further comprises a temperature control module, a vibration module, a pressurization module and a test module; the temperature control module is used for heating the sample and monitoring the temperature; the vibration module is used for providing different vibration intensities and monitoring vibration; the pressurization module is used for providing and monitoring the voltage; and the test module is used for monitoring the aging state of the sample. The test device can be used for multi-sample, single-factor or multi-factor accelerated aging test on the GIS solid insulating material, wherein the three aging factors, namely the electric field, thermal and mechanical vibration parameters, can be freely adjusted and combined according to aging requirements.

The invention provides a line-contact sliding-friction vibration noise test bench. The test bench adopts the sliding motion form of contact between plane specimen and cylinder specimen line, and line-contact sliding-friction vibration noise test can be realized; specimen disassembly and replacement can be facilitated by adopting the design of cantilever installation of the cylinder specimen and replaceable parts and supports, external loads of different sizes and speeds are applied to the specimen through a loading component and a synchronous-belt support component, and the line-contact sliding-friction vibration noise test bench of specimen pairs with different surface roughness and different types of materials can be realized under different loads. By the adoption of a manual drive mode,problems about too many intermediate links of motor driven motion transmission and too much background noise needing sound-insulating treatment and the like are avoided, test cost is lowered, and characteristics and influencing factors of friction noise under the line-contact sliding motion form can be researched more accurately.