23results about How to "True restoration" patented technology

The invention discloses a disease collection and presentation method based on a three-dimensional urban road. The method comprises the following steps: S1, building the three-dimensional urban road; s2, building a material library; road diseases are divided into expansion joints, linear cracks, blocky cracks, pits and fuzzy road marking lines according to the road disease types; step S3, a data acquisition step; s4, a road disease data analysis step; step S5, a data presentation step; reading road disease data in the database; and according to latitude and longitude data of the road diseases in the data, generating the road diseases of the corresponding contours at specified positions of the scene. Through the method provided by the invention, the urban road disease collected by the collection equipment is presented on the three-dimensional urban road, so that the appearance of the urban road is more truly restored, and road maintenance personnel can visually observe the type, the outline and the hazard degree of the road disease.

The utility model relates to a test fixture for a battery cell, which comprises a heat transfer plate, the bottom of the battery cell is used for being arranged on one side of the heat transfer plate, and the other side opposite to the side is provided with a cooling conduit for circulating cooling liquid; and the clamping assembly is used for clamping and fixing the battery cell. According to the principle of the test fixture, a cooling structure is generally arranged at the bottom of a whole pack under actual working conditions, so that the test fixture is provided with a heat transfer plate, the bottom of a battery cell is arranged on one side of the heat transfer plate during testing, a cooling guide pipe is arranged on the other side opposite to the side of the heat transfer plate, and cooling liquid flows in and out of the cooling guide pipe; the actual working condition that a cooling system cools the battery cell is simulated, the problem that the actual test condition deviates from the battery cell condition during actual operation of the whole pack is solved, the actual use condition can be restored more truly, the service life of the battery cell can be obtained more accurately through experimental data, and the test accuracy is improved.

The invention discloses a leaking stoppage simulation physical model evaluation method which comprises the following steps: acquiring a rock core; three-dimensional stress is loaded to the rock core through a true triaxial physical simulation experiment device, fracturing fluid is injected to fracture the rock core, and a needed crack is obtained; manufacturing a base plate according to the crack model, and putting the base plate into the crack; leaking stoppage slurry prepared by a leaking stoppage formula to be detected is injected into the crack with the base plate; the rock core injected with the leaking stoppage slurry is put into a true triaxial physical simulation experiment device, the true triaxial physical simulation experiment device is used for loading three-dimensional stress on the rock core, a leaking stoppage pressure-bearing curve and the leakage amount are obtained, and then the leaking stoppage effect of the leaking stoppage formula is evaluated. The stratum crack can be truly restored, the performance of the leaking stoppage formula can be evaluated more accurately, and the leaking stoppage effect of the stratum crack is effectively improved.

The invention discloses a rapid calculation method and system for high-speed low-temperature hydrogen jet flow field parameters. The method comprises the following steps that S1, a rapid calculation model for the high-speed low-temperature hydrogen jet flow field parameters is established; and S2, calculating low-temperature hydrogen jet flow field parameters based on the rapid calculation model. According to the method, parameters such as low-temperature hydrogen jet flow field concentration and temperature can be accurately and quickly calculated.

The invention provides snow-making refrigeration equipment, which adopts a semiconductor refrigeration technology, a semiconductor refrigeration sheet is provided with a heat dissipation cavity and a refrigeration cavity in a machine body corresponding to a heating surface and a refrigeration surface of the semiconductor refrigeration sheet, and the refrigeration cavity is a working area of the snow-making refrigeration equipment. The semiconductor chilling plate, the heat dissipation piece, the cold gathering body, the heat dissipation fan, the agitating device and the main control circuit board are arranged in the machine body, and the power supply assembly and the fluid supply device are arranged inside or outside the machine body. The fluid output end of the fluid supply device faces the refrigeration cavity or the heat dissipation cavity, the agitating device is arranged on the side, close to the refrigeration cavity, in the machine body, and an ice and snow cold source outlet is formed in the position, located at the rear end of the refrigeration cavity, of the machine body. The main control circuit board is electrically connected with the power supply assembly, the semiconductor chilling plate, the cooling fan, the agitating device and the fluid supply device. Water can be directly desublimated from a gas-liquid mixed state into a solid state through the refrigeration cavity, so that ice particles and snow haze grow into snowflakes or flaky ice crystals in the refrigeration cavity and then are blown out of the refrigeration cavity.

The application discloses an image processing method, and relates to the fields of auxiliary driving and image processing. The method comprises the following steps: for each sub-block image, acquiring the reference feature pixel point quantity, the first feature pixel point and the second feature pixel point of the to-be-fused boundary contour of the sub-block image; acquiring the coordinate data of the reference feature pixel point of the to-be-fused boundary contour according to the above parameters; determining the fusion boundary of the sub-block image according to the coordinate data corresponding to the first feature pixel point, the second feature pixel point and the reference feature pixel point; and performing image fusion on each sub-block image according to the position relationship between each fusion boundary and each sub-block image. The technical scheme of the embodiment of the application not only realizes the accurate construction of the fusion boundary conforming to the actual contour of the sub-block image, but also avoids the problems of obvious splitting, ghosting or display fault at the splicing position of the sub-block image, thereby improving the content continuity, integrity and clarity of the fused image.

The invention provides a high-precision reconstruction method for a three-dimensional global sound field in a deep ground space, and the method comprises the following steps: S1, sound field collection: collecting sound signals through a microphone array disposed in a target space; s2, model construction: an equivalent sound source and virtual sound source mixed model is constructed based on the sound signals collected in S1, the equivalent sound source and virtual sound source mixed model performs virtual extrapolation on a physical boundary of a target space to form an equivalent sound source surface, the equivalent sound source surface is dispersed into a plurality of equivalent sound sources, and the plurality of equivalent sound sources are subjected to virtual extrapolation; arranging at least one layer of virtual sound source outside the equivalent sound source surface; s3, sound field reconstruction: reconstructing and outputting a three-dimensional sound field in the target space based on the construction of the equivalent sound source and virtual sound source mixed model; according to the method, the original sound signals are directly collected in the target space, the authenticity of sound field data used for reconstruction is ensured, a reliable data foundation is laid for subsequent high-precision physical reconstruction, and compared with a traditional method depending on a database or artificially synthesizing a sound source, the method is extremely high in reduction degree.

The invention discloses a device for simulating the space weathering effect of lunar rock and a simulation method thereof.The device for simulating the space weathering effect of lunar rock comprises a vacuum chamber, a carrying table, a vacuum degree control module, a temperature control module, a pulse laser module, a high-energy ion beam module, a microscope module and a control module; the interior of the vacuum cabin is hollow to form a vacuum chamber; the carrying table is arranged in the vacuum cabin; the vacuum degree control module is arranged on the vacuum cabin; the temperature control module, the pulse laser module and the high-energy ion beam module are all connected with the vacuum chamber; the microscope module is arranged in the vacuum cabin and directly faces the carrying table; the control module is electrically connected with the vacuum degree control module, the temperature control module, the pulse laser module and the high-energy ion beam module. A plurality of modules are integrated and accurately controlled to simulate the space weathering action on the lunar rock, so that a scene under the combined action of a plurality of space weathering factors is realized, and the authenticity of a ground simulation test is improved.

The invention provides a laboratory accelerated simulation test method for a sealing part in a humid and hot marine environment. The method comprises the following steps: S1, pretreating a sealing test piece; s2, preparing a salt solution; s3, preparing an acidic medium; s4, carrying out an acceleration simulation test; the simulation test comprises a salt spray test, a temperature test and an alternating damp heat test. A plurality of cycles are carried out in the humid and hot marine environment simulation acceleration test, and the cycle number can be increased according to the test purpose. In the testing process, performance testing can be selectively carried out on the sealing part after each damp heat test or the whole acceleration test is finished. According to the test method, the actual service environment coupling effect of the sealing part can be more truly restored, then the fault phenomenon frequently occurring in the actual use process close to an external field can be exposed, the test can be rapidly and accurately carried out, comprehensive evaluation of multiple performance parameters of the sealing part is achieved, the aging degree of the sealing part in the comprehensive environment is determined, and the test efficiency is improved. And judging whether the sealing element reaches the service life or evaluating the residual service life.

The present invention relates to the cross - technical field of tunnel engineering and geotechnical mechanics testing, and discloses a triaxial compression grouting test device and method with a variable bearing contact area, which includes a cube - shaped specimen; the loading system includes a reaction frame and a plurality of hydraulic rods rotatably connected to the reaction frame through driving members. The output ends of the hydraulic rods are circumferentially connected with a plurality of pressurizing mechanisms, and the output ends of the hydraulic rods are also detachably connected with a plurality of groups of bearing blocks arranged circumferentially. The front surfaces of the plurality of bearing blocks in each group are arranged in an inclined plane in the counter - clockwise direction, and the outer edges of the plurality of bearing blocks in each group gradually shrink in an arc shape. The plurality of pressurizing mechanisms are respectively used to abut against the front surfaces of the plurality of groups of bearing blocks, and the back surfaces of the plurality of bearing blocks are fitted with corresponding multi - layer nested bearing plates, and the bearing plates are used to abut against the end faces of the specimen. The present invention can more realistically restore the stress state of tunnel surrounding rocks, can make the bearing area adaptively adjust as the volume of the specimen decreases, and avoid stress concentration.

The application discloses a semantic segmentation method based on phase profile constraint and belongs to the technical field of computer vision. The method uses a calibrated camera-projector system to collect a two-dimensional texture image and a deformed fringe image of a to-be-measured scene under the same field of view; the deformed fringe image is solved through multi-step phase shifting and Gray code technology to obtain an absolute phase distribution and calculate a gradient field; according to a preset mutation condition, a physical edge profile reflecting the depth change of an object is extracted from the gradient field; the physical edge profile is mapped into the two-dimensional texture image based on the corresponding relationship of pixel coordinates to accurately define the semantic object area, the corresponding category label is given, and finally a semantic label mask image is generated. The application uses physical phase information to correct the uncertainty of visual texture edges, effectively solves the edge extraction problem under a complex light scene, realizes the automatic generation of semantic segmentation data, and improves the training precision and robustness of a semantic segmentation model.

The application discloses a gravity and magnetic inversion method based on grid merging and BTTB matrix fast forward, relates to the technical field of gravity and magnetic exploration, and comprises the following steps: establishing a basic forward and inversion grid and a basic grid kernel function matrix; initializing a coarse grid model and a conversion matrix; coarse grid inversion; adaptive grid subdivision based on a model gradient and establishment of a new conversion matrix; fine grid inversion; iterative convergence and output. The application has the beneficial effects that the BTTB kernel function matrix is calculated based on the basic grid in advance, the conversion from fine scale model parameters to coarse scale model parameters is realized through the conversion matrix, the iterative closed loop process of coarse grid inversion, adaptive grid subdivision and fine grid inversion is adopted, the criterion of adaptive grid subdivision is to compare the gradient eigenvalue of the current inversion model parameters with a preset threshold value, and in the grid inversion of different scales, the BTTB kernel function matrix generated by the same set of basic grid in advance is used to realize fast forward through the processing of the conversion matrix.

The embodiment of the invention belongs to the field of earphones, and relates to an earphone and an earphone playing system, the earphone comprises a first shell, a second shell, and a first loudspeaker and a plurality of second loudspeakers arranged on the first shell; the first shell and the second shell are connected to form an accommodating cavity; the first shell is in a circular truncated cone shape or an approximate circular truncated cone shape and is provided with a bottom face and a side face, the first loudspeaker is arranged on the bottom face of the first shell, the second loudspeakers are arranged on the side face of the first shell at intervals, and the first loudspeaker and the second loudspeakers are all located in the containing cavity. The earphone playing system comprises the decoding earphone playing box and the earphone. According to the scheme provided by the invention, the first loudspeaker and the plurality of second loudspeakers are respectively arranged on the bottom surface and the side surface of the first shell, so that a plurality of sound channels can be played in different directions, sound impact effects of different angles and different directions can be truly restored structurally, and sound details are truly restored.

The present invention discloses an in-situ testing device and method for the interface friction characteristics of the distribution pair of an inner curve radial piston hydraulic motor. The transmission shaft of the distribution pair simulation module is connected to the motor, and the distribution pair simulation module is threadedly connected to the distribution pair guide module. By controlling the motor speed and the high and low pressure distribution window pressures of the distribution plate, the high and low pressure distribution function of the distribution pair in the hydraulic motor and the wear state of the interface between the simulated distribution plate and the cylinder body can be truly restored, so that the interface friction characteristics of the distribution pair are consistent with the in-situ measurement results. Compared with the whole machine test of the hydraulic motor, the in-situ testing device for the interface friction characteristics of the distribution pair proposed by the present invention is easy to assemble and disassemble, has high reliability, and has a low test cycle and test cost. At the same time, it has universality and applicability for the comprehensive performance test of the distribution plate of the inner curve radial piston hydraulic motor.

The application discloses a motor bearing dynamic load testing device based on double-shaft coupling and relates to the technical field of bearing testing. The device is obviously different from the conventional bearing load testing mode in that a semi-linkage structure is formed by a power output shaft, a joint shaft and a power detection shaft, the semi-linkage structure is convenient for the acquisition process of subsequent rotation parameters, the accurate testing of the dynamic load of the motor bearing is realized through the cooperative work of a first sliding table, a second sliding table and a third sliding table, the design of the semi-linkage structure makes the power output and detection more flexible, the response characteristics of the motor bearing under different load conditions are accurately captured, the setting of multiple detection components and an axial polarization detection component further improves the comprehensiveness and accuracy of the testing, the active intervention of a pulse action component on a ball head rod simulates the working state of the motor bearing in different action environments, the pulse action component provides strong support for the performance evaluation and optimization of the motor bearing, and the accuracy of the testing data in the testing process is improved.

This invention discloses a method for monitoring and early warning of the resilience evolution of water resources systems based on GTWR regression, belonging to the field of water resources and environmental management technology. The method includes: constructing a resilience evaluation system for a water resources complex system in a specific watershed; acquiring multi-source data for nodes, determining the objective weights of indicators, and quantifying resilience scores; extracting spatial differentiation characteristics of resilience levels through spatial autocorrelation analysis, and identifying the set of driving factors using a geographic detector; introducing the GTWR model to calculate the spatiotemporal regression coefficients of each driving factor, dynamically identifying the heterogeneity of the driving mechanisms for resilience evolution; and establishing a graded early warning mechanism by combining resilience level standards and driving patterns. This invention solves the technical problem of traditional assessment methods neglecting spatiotemporal nonstationarity, and can accurately identify resilience bottlenecks in different regions and at different times, possessing high monitoring accuracy and practical value.

This invention discloses an image tone adjustment method, a head-mounted display device, and a storage medium. The method includes: acquiring an ambient color temperature value and initial image data; determining tone adjustment parameters for the initial image data based on the ambient color temperature value; adjusting the initial image data according to the tone adjustment parameters to obtain target image data; and displaying the target image data on the display interface of the head-mounted display device. This invention aims to improve the accuracy of head-mounted display devices in reproducing ambient tones and enhance the user experience.

The invention discloses a human body activity and form measurement method based on multi-RGB camera three-dimensional dynamic capture, and relates to the technical field of image processing, and the method comprises the steps: obtaining a multi-view image sequence of a target object in a human-computer interaction process; based on the multi-view image sequence, determining a basic body surface of the target object, and determining an inward shrinkage equidistant surface obtained after the basic body surface shrinks inward for a preset distance; determining a three-dimensional point cloud model of the target object based on the basic body surface, the indentation equidistant surface and the multi-view image sequence; grid reconstruction is carried out on the three-dimensional point cloud model, texture mapping is carried out on the three-dimensional point cloud model after grid reconstruction, a three-dimensional point cloud model after texture mapping is obtained, and a three-dimensional dynamic model of the target object is determined according to the three-dimensional point cloud model after texture mapping corresponding to each visual angle image in the multi-visual angle image sequence; and carrying out activity measurement and form measurement on the target object based on the three-dimensional dynamic model.

This invention discloses a method for testing the overall magnetic permeability of the shielding layer of a magnetically shielded room, relating to the field of magnetic property measurement technology for magnetic materials. The method involves setting multiple first and second threading holes on two edges of a wall perpendicular to the x-direction of a cuboid shielded room. Multiple primary and secondary coils, connected in series, are then wound through the first and second threading holes. An excitation power supply is used to power the primary coils, and a magnetic flux detector is used to detect the magnetic flux induction in the secondary coils. Based on the multiple measured values, a (B, H) curve is plotted, and its slope is calculated to obtain the magnetic permeability of the cuboid magnetically shielded room. This method improves the accuracy of magnetic permeability measurement for cuboid magnetically shielded rooms and reduces the deviation between theoretical and actual values ​​in the analysis of the shielding effectiveness of the magnetically shielded room.

The application provides a kind of intelligent pipe network leakage monitoring system.The system includes multi-band vibration signal acquisition module, analog front-end signal conditioning module, micro control unit processing module and leakage state output module.Multi-band vibration signal acquisition module acquires two independent original vibration analog signals through acoustic-vibration integrated sensor and acoustic emission sensor;Analog front-end signal conditioning module performs amplification and filtering processing on the signals to obtain two pure vibration analog signals;Micro control unit processing module converts the signals into digital signals and performs frequency band splicing to form a fusion digital vibration signal covering complete and effective monitoring frequency bands, then extracts characteristic parameters and compares with normal characteristic library to determine leakage state information;Leakage state output module outputs standard format signal.The application solves the technical defects of incomplete frequency band coverage and high miss rate of traditional monitoring methods through multi-band signal fusion and splicing, and improves the comprehensiveness and stability of pipe network leakage identification.

This invention provides a dynamic risk assessment method for DC bias magnetization of transformers caused by stray currents in subways, relating to the field of power system technology. The invention acquires dynamic train operation data for the current time period, simulates the dynamic train operation data based on a pre-constructed subway-regional power grid coupling model to obtain the DC bias magnetization current at each time point in each substation area, and determines the risk level of the absolute bias magnetization current at each time point. For each substation area, its risk type is determined based on the risk level distribution of the absolute bias magnetization current in the current time period, and corresponding processing strategies are set to obtain the comprehensive absolute bias magnetization current for each risk type. The comprehensive absolute bias magnetization current for each non-substation area is determined based on a partitioned weighted interpolation algorithm. The risk situation for the simulated time period is determined based on the comprehensive absolute bias magnetization current, and a risk assessment map is derived. Through specialized processing of different risk types, accurate risk assessment for each time period is achieved.

The utility model relates to the technical field of electricians, in particular to low-voltage electrician safety operation training equipment. The device comprises a bottom support, a vertical supporting rod is arranged on the bottom support, a mainframe box is arranged on the vertical supporting rod, operation training panels are arranged on the front face and the rear face of the mainframe box, and a first practical training panel and a second practical training panel are arranged on the operation training panels; the main case is provided with a main power switch and is matched with a corresponding indicator light; and the main case is also provided with a timer and is matched with a corresponding reset button. According to the low-voltage electrician safety operation training equipment of the utility model, through cooperation of the bottom support, the vertical supporting rod, the host box, the first practical training panel, the second practical training panel, the main power switch, the indicating lamp, the timer, the reset button and the like, during a student skill test, two students can operate on two surfaces of the same equipment; and the examination efficiency is greatly improved.

The present application relates to livestock state monitoring technical field, especially in kind of livestock outlier detection method, electronic equipment and computer storage medium, including the following steps: S1. Construct data set; S2. Use target detection tool to carry out object detection to each picture in data set, draw the position mark of each livestock; S3. The position mark of all pictures in data set is superimposed in position, and the hotspot map is drawn;S4. According to the position mark in picture, the distance value of each livestock and the density score value of each livestock are calculated;S5. If the distance value and the density score value of certain livestock meet the outlier condition, the livestock is regarded as outlier;S6. If the time of continuously finding the livestock regarded as outlier exceeds time threshold, it is determined that there is livestock outlier in the fence;The present application does not need to be matched with identity tag, identification and tracking technology, and the calculation amount is small, fully considers space density, resource distribution, group activity mode, individual difference and other factors, and the outlier recognition precision and efficiency are significantly improved.