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65results about How to "Experimental effect is good" patented technology

Temperature difference-sediment coupling density flow simulation test system

The invention relates to a temperature difference-sediment coupling density flow simulation test system. The test system comprises a muddy water tank, a water pump, a heating device, a water channel, a turbine flowmeter, a plurality of thermographs and a circulating water pond; the water channel is connected with the water pump and the muddy water tank through a duct, the turbine flowmeter is connected with the duct, temperature probes of each thermograph are arranged at two vertical water temperature measurement positions of the side wall inside the water channel, and the heating device is installed above the water channel. The test system is simple in structure and convenient to operate; by the aid of the test system, the interference of the heating device to a flow field inside the water channel at the density flow test stage in the past is reduced, and the motion process of a sediment density flow in a temperature-layered water body is simulated successfully; special phenomena of advancing of the sediment density flow in the middle layer and the surface layer of the water channel under the influence of vertical water temperature laying are achieved, and in addition, the reliability and the accuracy of density flow analysis and research can be improved.
Owner:SICHUAN UNIV

Closed rotary maze device for animal memory training system

InactiveCN102144572AOvercome the deficiency of lateral dominanceIn line with normal physiological and behavioral activitiesAnimal housingTaming and training devicesAnimal scienceWater maze
The invention discloses a closed rotary maze device for an animal memory training system. The maze device comprises a round box body and a circuit control system. Key technical points of the maze device are that: the bottom of the box body of the maze device is provided with a turntable driven by a motor; the motor is arranged on a central cylinder, and an output shaft of the motor is in fastenedwith the turntable along the axial direction of the central cylinder; the turntable rotates around the central cylinder under the driving of the motor; the periphery of the lower part of a frame of the box body is provided with a plurality of pulleys for supporting the turntable; and a sieve-shaped supporting net is arranged above the turntable. The maze device overcomes the defect of the lateralization in the detection of the conventional maze devices such as a Y-maze and a T-maze. In addition, a device driven by gradient voltage is removed; the maze device effectively prevents animals from finishing experiments by means of smell, and respective disadvantages of a Morris water maze, the Y-maze and a drought maze are weighted; the starlight detection can be performed through program control according to the nocturnal habits of the experimental animals; and the maze device can ensure that the experimental animals are subjected to sensory stimulation in real environment, which is more favorable for acquisition of experimental data.
Owner:SHENYANG MEDICAL COLLEGE

Method for rapidly extracting massive data files in parallel based on memory mapping

The invention discloses a method for rapidly extracting massive data files in parallel based on memory mapping. The method comprises the following steps of: generating a task domain: forming the task domain by task blocks, wherein the task blocks are elements in the task domain; generating a task pool: performing sub-task domain merger of the elements in the task domain according to a rule of lowcommunication cost, taking a set of the elements in the task domain as the task pool for scheduling tasks, and extracting tasks to be executed by a processor according to the scheduling selection; scheduling the tasks: according to the remaining quantity of the tasks, determining the scheduling particle size of the tasks, extracting the tasks according with requirements from the task pool, and preparing for mapping; and mapping a processor: mapping the extracted tasks to be executed by a currently idle processor. According to the method disclosed by the invention, the multi-nuclear advantagescan be played; the efficiency for an internal memory to map files is increased; the method can be applicable for reading a single file from a massive file, the capacity of which is below 4GB; the reading speed of this kind of files can be effectively increased; and the I/O (Input/Output) throughput rate of a disk file can be increased.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY

Underwater shortest field electrical spark bubble wall pressure load measurement experiment device

The invention provides an underwater shortest field electrical spark bubble wall pressure load measurement experiment device. A measurement rod is arranged in a measurement rod protection barrel, penetrates through an opening in a target plate and is in contact with water in a water tank; an underwater electrical spark discharge needle is arranged nearby the target plate; a needle tip of the discharge needle is coaxial with the measurement rod. Electrical spark discharge triggers underwater explosion bubbles, and an explosion load acting on the wall surface of the target plate generates a stress wave in the measurement rod. A signal of the stress wave in the rod is measured by means of a strain gage arranged on the measurement rod, the explosion load acting on the wall surface of the target plate is derived reversely, and an underwater shortest field electrical spark bubble wall pressure load is measured. The whole process of underwater electrical spark bubbles is observed by means of a high-speed camera. The device is safe to use and good in experiment effect, and can research the underwater shortest field electrical spark bubble wall pressure load, thereby providing an effective experiment method for research on an underwater shortest field explosion wall pressure load mechanism.
Owner:HARBIN ENG UNIV

Three-dimensional Douglas-Peucker algorithm based map simulation method for synchronous integration of river network elements and DEM

InactiveCN104978763AComprehensive implementationQuality improvement3D modellingRiver networkData set
A three-dimensional Douglas-Peucker algorithm based map simulation method for synchronous integration of river network elements and a DEM is provided, and the present invention relates to a map simulation method for synchronous integration of river network elements and a DEM. The present invention solves the problem that integration operations of river network and DEM data are not synchronous. The method provided by the invention is realized through the following steps of: 1, after performing hierarchical grading on a river network, and extracting a river network three-dimensional discrete point set; 2, extracting a three-dimensional discrete point set from a DEM; 3, combining the data point sets; 4, performing an integration operation on the combined data set by using a three-dimensional Douglas-Peucker algorithm that is improved by a bend adjustment index, to obtain an integrated data set; 5, re-separating the integrated data set according to a point set attribute; and 6, reconstructing a triangulation network on a DEM point set by using river line segments as constraint edges, to realize steps such as synchronous integration and expression of the two elements. The method provided by the present invention is applied to a three-dimensional geographic information system mapping and integration field.
Owner:CHINA UNIV OF MINING & TECH (BEIJING) +1

Brain computer interface P300 signal characteristic somatosensory evoked device and application method therefor

InactiveCN107066091AOvercoming the disadvantage of inducing inefficiencySolve the problem of not being able to build a visually independent brain-computer interfaceInput/output for user-computer interactionDiagnostic recording/measuringMicrocontrollerBrain computer interfacing
The invention discloses a brain computer interface P300 signal characteristic somatosensory evoked device and an application method therefor. The device comprises an upper computer communication unit and at least one lower computer unit; the upper computer communication unit comprises an USB-to-serial port module; the lower computer unit comprises a single-chip microcomputer, a motor driving unit, a motor unit and a low voltage direct current power supply; the motor unit comprises a plurality of direct current oscillation motors serving as a tactile stimulus source; the single-chip microcomputer is connected to the USB-to-serial port module, and an output end of the single-chip microcomputer is connected to each direct current oscillation motor through the motor driving unit respectively; the output end of the low voltage direct current power supply is connected to a wireless communication lower module, the single-chip microcomputer, and the motor driving unit respectively. The application method comprises the following steps of generating a stimulation sequence L through the upper computer, and implementing stimulating state and non-stimulating state control to each direct current oscillation motor by traversing each periodic sequence group trial in the stimulation sequence L. The brain computer interface P300 signal characteristic somatosensory evoked device and the application method therefor have the advantages of being convenient in use, high in correct classifying rate, good in stability and high in universal property.
Owner:NAT UNIV OF DEFENSE TECH

High-precision air floatation vertical adjusting mechanism based on differential measurement

The invention provides a high-precision air floatation vertical adjusting mechanism based on differential measurement, and belongs to the field of ground full physical simulation. The high-precision air floatation vertical adjusting mechanism aims at solving the problems that when the pressure of a measuring air cavity of a vertical motion mechanism is measured, due to the fact that the measuring range of a pressure sensor is too large, precision becomes worse, and the degree of nonlinearity and deviation are correspondingly increased. The high-precision air floatation vertical adjusting mechanism is composed of a vertical motion mechanism, a reference pressure air cavity, an absolute pressure sensor and a relative pressure sensor. The reference pressure cavity is formed beside the vertical motion mechanism, the absolute pressure sensor is arranged in the reference pressure cavity, the vertical motion mechanism is composed of a vertical air floatation bearing outer sleeve and a vertical air floatation bearing inner sleeve, a vertical air cavity is formed between the vertical air floatation bearing outer sleeve and the vertical air floatation bearing inner sleeve, and the relative pressure sensor is arranged between the vertical air cavity and the reference pressure cavity. The absolute pressure of the vertical motion mechanism is measured in the mode that the absolute pressure and the relative pressure of the reference pressure cavity are superimposed, high measuring precision is achieved, and the good experiment effect can be achieved.
Owner:HARBIN INST OF TECH

A single slit diffraction experimental demonstration device for physics teaching

The invention relates to the field of teaching appliances, and provides a single slit diffraction experimental demonstration device for physics teaching, including an iron plate; a variable angle adjusting mechanism is fixed on the iron plate, a laser emitter and a projection plate are arranged on two sides of the variable angle adjusting mechanism respectively, the variable angle adjusting mechanism comprises an outer ring and an inner ring coaxially fixed on the upright post, the lower end of the upright post is vertically fixed on an iron plate, a plurality of guide rods are slidably connected on the inner ring, one end of the guide rod pointing to the center of the inner ring is movably connected with two connecting rods with the same structure, two adjacent connecting rods on the adjacent two guiding rods are hingedly connected at the ends pointing to the center of the inner ring through a pin shaft, and the inner side of the outer ring is connected with a gear ring. The single slit diffraction experimental demonstration device for physics teaching can realize continuous collection of diffraction image of laser projection under the condition of continuous change of slit width,and the corresponding diffraction image can be obtained at one time. The device has the advantages of simple operation, small amount of labor, vividness and interestingness, and is helpful to improvestudent interest, and is very suitable for popularization in physics teaching.
Owner:瑞安市任奇科技有限公司

Atmosphere corrosion acceleration test method

The invention discloses an atmosphere corrosion acceleration test method which comprises the following steps: firstly, designing an acceleration test device; then linearly cutting and grinding a test sample, and fixing the test sample on a test hanging rack of the acceleration test device. During test, a controller controls a water feeding and drainage mechanism to work to fill a water storage tank with seawater, and a dry-wet circulating corrosion test is carried out, and comprises the following procedures: the controller controls a hanging rack lifting device to put the test hanging rack into the seawater in the water storage tank for soaking for T1, and the test hanging rack rises for drying in air for T2; finally, the procedures of the dry-wet circulating corrosion test are repeated till reaching a specified test period; and upon completion of the acceleration test, the sample is analyzed for corrosion. The atmosphere corrosion acceleration test method is convenient to operate; the corrosion acceleration test is carried out outside; a test environment is a natural environment, and the seawater is actually used as a corrosion acceleration medium, so that the simulation property and the acceleration speed for ocean and atmosphere corrosion processes are high; furthermore, the dry-wet circulating period can be adjusted according to corrosion characteristics of different materials; and on the basis that the corrosion progress is not changed, the acceleration speed is increased.
Owner:GUANGDONG OCEAN UNIVERSITY

Quantitative evaluation device for rock permeability damage caused by crude oil asphaltene and application of quantitative evaluation device

The invention relates to a quantitative evaluation device for rock permeability damage caused by crude oil asphaltene and application of the quantitative evaluation device, and belongs to the technical field of experimental equipment for oil exploitation. The device comprises a constant-speed constant-pressure micro pump, a high-pressure formation oil container, a high-pressure kerosene container,a rock core holder, a filter and a vacuum pump, wherein the constant-speed constant-pressure micro pump is connected with one end of the high-pressure formation oil container and one end of the high-pressure kerosene container, the other end of the high-pressure formation oil container is connected with an inlet of the rock core holder through a back pressure valve a; the other end of the high-pressure kerosene container is connected to an inlet of the rock core holder; an outlet of the core holder is connected with the filter and the vacuum pump; the filter is connected to a back pressure valve b; the back pressure valve a and the rock core holder are connected with a hand pump a; and the back pressure valve b is connected with a hand pump b. According to the present invention, the rockpermeability change amount caused by crude oil asphaltene precipitation and the adsorption amount of asphaltene in the rock core can be measured under the stratum temperature condition, and the experimental data support is provided for evaluation of heavy oil reservoir damage caused by asphaltene deposition.
Owner:中海石油(中国)有限公司深圳分公司 +1

Method for identifying phytophythora infestans physiological race and application thereof

The invention belongs to the technical field of plant breeding for disease resistance and in particular relates to a method for identifying phytophythora infestans physiological race and application thereof. The method for identifying phytophythora infestans physiological race disclosed by the invention comprises the following steps: (a) setting a disease nursery field; (b) culturing a potato hostmaterial on a culture medium, and performing water culture to form water culture seedlings; (c) transplanting the water culture seedlings into the disease nursery field in the step (a); and (d) performing disease investigation on potatoes in the step (c), and recording the type of the phytophythora infestans physiological race. The experimental study is performed by selecting natural disease nursery, the advantages of scientificity, effectiveness and environment friendliness are taken into account, the requirement on professional skill is low in the whole experimental process, the operation is simple and feasible, the latter half part of the experiment is transferred into a large field for identification, the experimental effect is obvious, the experimental duration is shortened, and theexperimental accuracy is improved.
Owner:ACAD OF AGRI SCI ENSHI TUJIA MIAOAUTONOMOUS PREFECTURE

Experiment device for simulating horizontal well deflagration fracturing and experiment method thereof

ActiveCN106950125APrecise experimental control operationEffective data analysisMaterial strength using single impulsive forceInternal pressureRock core
The invention relates to an experiment device for simulating horizontal well deflagration fracturing and an experiment method thereof. The experiment device comprises a rock sample clamping device, a pendulum bob impacting device, and a control analysis device. The rock sample clamping device comprises a cylinder. Rock cores with different characteristics can be placed in the cylinder. The cylinder is provided with a borehole internal pressure inlet opening, a confining pressure inlet opening, an air outlet, and a seepage channel outlet. The pendulum bob impacting device comprises a pendulum bob, an electric motor, and a roller. The electric motor drives the roller to rotate. The roller pushes the pendulum bob to knock a moving plunger on one side of the cylinder so as to load impact force onto the rock cores in the cylinder; confining pressure is loaded through the confining pressure inlet opening; and internal pressure is loaded through the internal pressure inlet opening. Through the provided experiment device, the destruction of deflagration impact in a horizontal well on rock cores with different characteristics and lengths can be researched; at the same time, the experiment operation can be precisely controlled, data can be effectively analyzed, and the experiment effect is good and prominent.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Method for simulating exploitation of worked-out section and device for achieving method

ActiveCN104614505ASimulation experiments are easy to implementEasy to implement simulation experimentsEarth material testingParaffin waxClassical mechanics
The invention discloses a method for simulating the exploitation of a worked-out section, and solves the problems that an iron box-pull-out method and a paraffin-resistor burn melt method are difficult to realize and the experiment effect is poor in the prior art. The method comprises the following steps: (1) arranging a plurality of rubber pipes and laying the rubber pipes according to the size of a to-be-simulated worked-out section; (2) fully filling each rubber pipe with flowing filling substances, knotting two end parts of each rubber pipe, and winding the knotted positions by utilizing steel wires; (3) laying a rock layer on the laid rubber pipes which are fully filled with the flowing filling substances, and exposing the end part of one section of each rubber pipe out of the upper rock layer; (4) cutting off the end part of one end, exposed out of the upper rock layer, of each rubber pipe; (5) inserting a hollow pipeline into each rubber pipe from the cut-off end part of the rubber pipe, so that the flowing filling substances in the rubber pipes can flow out from the hollow pipeline; and (6) repeating the step (5), so that the exploitation of the worked-out section can be simulated. The method is convenient and simple to realize, and good in experiment effect and is suitable for being popularized and applied in a large range.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
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