159 results about "Two grid" patented technology

The invention provides an urban traffic demand prediction method and apparatus, an electronic device and a storage medium. The method comprises the steps of obtaining an urban grid map, mobile phone signaling data and urban feature statistical data of a target city; determining a target travel volume of each grid unit according to the mobile phone signaling data and the urban characteristic statistical data; constructing a grid feature vector of each grid unit according to the urban feature statistical data; for any starting grid unit and any target grid unit, respectively taking the corresponding grid feature vectors and the grid distance between the two grid units as target input parameters, inputting the target input parameters into a pre-trained depth gravity prediction model, and obtaining a travel selection probability between the starting grid unit and the target grid unit; and calculating traffic travel prediction data based on the travel selection probability and the target travel volume of the departure grid unit. According to the invention, multi-source data can be effectively fused by using the depth gravity model, and the precision of urban traffic demand prediction is improved.

The invention relates to the technical field of digital twinning, in particular to a high-performance digital twinning system rendering method based on dual-grid and neural network mapping, and the method comprises the steps: constructing a high-precision calculation grid and a low-precision rendering grid, and building a space mapping relation between the two grids; executing multi-working-condition numerical simulation to obtain a high-dimensional simulation result snapshot matrix; the dimension reduction projection operator is used for reducing the dimension of a high-dimensional simulation result of any working condition into an r-dimensional feature vector; generating low-dimensional reference field data by using the space mapping relation; training the neural network until a mapping network parameter is obtained through convergence; obtaining current working condition parameters of the equipment in real time, and obtaining a current r-dimensional feature vector by using the dimensionality reduction projection operator; and quickly generating physical field prediction distribution on the low-precision rendering grid and performing pseudo-color rendering. According to the scheme, the problem that a traditional method is low in rendering efficiency is solved, and the method has the advantages of reducing computing resource consumption and keeping visualization precision.

The invention relates to the field of fuel assemblies, in particular to a correction calculation method for the outline of a fuel assembly and a judgment method for influence on charging. The correction calculation method comprises the following steps: firstly, collecting data of two surfaces of an undeformed standard fuel assembly and a fuel assembly to be detected, wherein the data comprises distances between an upper tube seat, a lower tube seat and a positioning grid and a probe; calculating the reading offset of each layer of positioning grillwork; comparing the reading offset of each layer of the positioning grillwork and the reading offset of the upper tube seat, and calculating the deformation of each layer of the positioning grillwork; selecting two adjacent layers of grillwork, connecting the two layers of grillwork into a straight line, and calculating the middle offset of each layer of positioning grillwork under the condition of no deformation by taking the offset of the two grillwork as a reference; calculating the correction deformation of each layer of positioning grillwork of the fuel assembly by using the reading offset and the middle offset to obtain the maximum correction deformation of the fuel assembly; and calculating the correction deformation of the lower tube seat relative to the upper tube seat. According to the invention, the accuracy of fuel assembly contour calculation is improved.

The invention relates to the technical field of video compression coding and decoding, and discloses a VVC dependent quantization hardware pipeline architecture design method, which comprises the following steps of: introducing a predefined code table in an initialization stage to initialize the predefined code table; an eight-level assembly line unit is adopted in the assembly line quantization stage, and four pieces of quantization state information are finally obtained by performing pre-quantization, distortion calculation, quantization candidate value calculation, context index calculation, code rate estimation and viterbi calculation on a transformation coefficient through the eight-level assembly line unit; a first grid memory and a second grid memory are introduced in an optimal quantization path output stage, ping-pong storage operation is carried out through the two grid memories, and quantization throughput can be maximized; the next TB block can be quantized without waiting for the completion of the output of the quantization result; according to the method, the problem that parallel quantization is difficult to realize between the conversion coefficients in the existing dependent quantization is solved.

A dynamic frequency coordination control method for asynchronous regional power grids during wet and dry seasons is provided. By using frequency synchronous control in VSC-HVDC, frequency consistency and synchronization between the sending-end and receiving-end grids can be ensured within the range of power adjustment, enabling real-time and automatic sharing of frequency regulation resources between the two grids. Through the use of bilateral frequency limiting control in LCC-HVDC, the frequency regulation effect is enhanced, balancing frequency fluctuations between the sending-end and receiving-end grids. VSC-HVDC adaptive reactive power support control is employed to provide reactive power support to nearby LCC-HVDC, avoiding frequent operations of LCC-HVDC converter transformers and filters during frequency limiting control actions, thereby extending equipment lifespan. Furthermore, by utilizing grid-following and grid-forming control in renewable energy grid integration with additional frequency control, the frequency support capacity of renewable energy generation is improved.

The invention relates to the technical field of radiotherapy, and discloses a method for generating a boron neutron capture therapy plan, computer equipment and a storage medium. Comprising the following steps: based on current state data of neutrons, determining first section data, second section data and a current transport distance of the neutrons at a current position, and judging whether the neutrons collide or not; wherein the first cross section data is used for describing the macroscopic cross section of nuclides except boron, and the second cross section data is used for describing macroscopic cross section neutrons obtained through calculation according to the boron concentration of the current grid and the microcosmic cross section of the nuclide boron; and under the condition that neutrons do not collide and the neutrons are transmitted from the current grid to the next grid through the surface, if the two grids are made of the same material, updating the second cross section data based on the boron concentration of the next grid to calculate the dose, and finally generating a boron neutron capture therapy plan by using a dose distribution calculation result. Therefore, only the cross section data related to the boron concentration is updated in the penetrating surface, and the calculation efficiency is optimized.

The invention relates to a multi-fidelity fluid data fusion simulation modeling method, device and equipment. The method comprises the following steps: acquiring factory fluid data of equipment parts stored in a multi-fidelity file and use fluid data of the equipment parts in a simulation environment; sampling the two pieces of data by adopting a Latin hypercube algorithm, outputting low-fidelity wall surface grid data and high-fidelity wall surface grid data, and constructing a kernel coupling matrix according to the two pieces of grid data; and taking multi-fidelity data obtained by combining the two pieces of grid data as a sample data set, inputting the sample data set into a multi-fidelity Gaussian regression simulation model constructed according to a kernel coupling matrix, and solving the kernel coupling matrix by adopting a radial basis function kernel function to obtain a to-be-evaluated sample data set. And verifying the to-be-evaluated sample data set through a preset error evaluation index to obtain real fluid data. By adopting the method, the production efficiency of high-performance equipment parts can be improved.

The embodiment of the invention relates to the photovoltaic field, and provides a back contact cell, a back contact laminated cell and a photovoltaic module, and the back contact cell comprises a cell substrate which comprises at least one isolation region extending in a first direction and two grid line regions located at the two opposite sides of the isolation region; the grid line region comprises a first doped region and a second doped region which are spaced from each other, and a gap region located between the first doped region and the second doped region; the isolation region is located between the first doped region of one of the two adjacent grid line regions and the second doped region of the other of the two adjacent grid line regions, and the width of the isolation region is larger than that of the gap region in the second direction; the at least two main grid sections are located on the grid line area and are arranged at intervals in the first direction; the two adjacent main grid sections in the first direction are the first main grid section and the second main grid section respectively, and the two adjacent main grid sections in the second direction are the first main grid section and the second main grid section respectively. The embodiment of the invention is at least beneficial to improving the hot spot resistance of the back contact battery by means of the isolation region under the condition that the battery substrate is not divided.

The present invention belongs to the technical field of fluid mechanics, and specifically discloses a high-precision interpolation method for flow field data in overlapping grid areas, comprising the following steps: cutting holes in overlapping grid areas, obtaining interpolation units at the same time, and removing non-nearest interpolation units in the interpolation units to obtain an interpolation interface; searching for contribution units of the interpolation interface to obtain an interpolation template of the interpolation interface; using bilateral interpolation to determine the flux of the interpolation interface according to the flow field variables of each interpolation point in the interpolation template; and using the flux of the interpolation interface as a boundary condition to perform flow field calculations. The present invention can simultaneously utilize the data of two grids, so that the width of the overlapping area of ​​the overlapping grids is reduced, solving the problem of difficulty in assembling overlapping grids when ensuring high interpolation accuracy in the prior art.

The utility model relates to the technical field of grille assemblies of lighting lamps, and discloses a grille assembly capable of being rapidly disassembled and assembled and a bladeless fan lamp. The grid assembly capable of being rapidly disassembled and assembled comprises a base and two grid units, and the two grid units are in butt joint and surround the periphery of the base; each grating unit is provided with a first end part and a second end part, a fixing structure for disassembly and assembly is arranged between the first end part and the base, and the fixing structure comprises a fixing groove and a fixing block which are connected in a clamping manner; the fixing groove and the fixing block are of matched arc-shaped structures, the grating unit is detachably connected with the base through a fixing structure, and the second end is connected to the fan lamp body in an attached mode. The utility model has the following technical effects: the grid units are disassembled by rotating the grid units, and the disassembling steps are simple to operate and can be operated blindly, so that the disassembling difficulty of the grid units is reduced; and the grid assembly capable of being quickly disassembled and assembled also ensures the mounting stability of the grid units.

The application relates to a kitchenware storage device and a running method and device thereof. A dumping detector is arranged to detect whether the kitchenware storage device dumps. In the case that the kitchenware storage device dumps, a control assembly can control a protection assembly to run. The protection assembly applies pressure to the kitchenware inserted between two adjacent grid bars towards one of the grid bars. Thus, the kitchenware inserted between the two grid bars is fixed under the action of the pressure, and the risk of the kitchenware sliding is reduced. Through the scheme, the kitchenware can be fixed when the kitchenware storage device dumps, the kitchenware such as knives is prevented from sliding, and the use safety of the kitchenware storage device is improved.

The embodiment of the invention provides a shape generation method and device, and belongs to the technical field of computers. The shape generation method comprises the following steps: acquiring an initial shape and a preset grid chart, wherein the preset grid chart comprises a plurality of grids; according to the initial shape and the preset grid chart, a plurality of effective grids are determined, and at least two grid edges of each effective grid intersect with the initial shape; determining the nearest distance from each vertex of the plurality of effective grids to the initial shape; according to the multiple nearest distances, grid intersection points where the initial shape intersects with the grid edges of all the effective grids are determined; and generating a target shape corresponding to the initial shape according to the plurality of grid intersection points. According to the technical scheme provided by the embodiment of the invention, the calculation of invalid grids which are not intersected with the initial shape can be avoided, so that the algorithm complexity of shape generation is reduced, and the efficiency and accuracy of shape generation are improved.

Hardware unit (10) for determining a non-linear ground surface, the hardware unit (10) comprising: at least one data input interface (1) via which the hardware unit (10) receives measurement points (M) from a 3D point-supplying sensor (20); a computing device (2) which maps the measurement points (M) into a two-dimensional grid (G) and determines a height difference for each grid cell (C) based on the measurement points (M) assigned to that grid cell (C), and classifies one of these grid cells (C) as invalid if the respective height difference exceeds a predetermined threshold; if the respective height difference of one of these grid cells (C) does not exceed the threshold and the respective height difference of at least two grid cells (C) directly adjacent to that grid cell (C) also does not exceed the threshold, classifies that grid cell (C) as a flat surface;wherein the computing device (2) performs a connected component analysis stepwise over the grid cells (C) classified as planar surfaces, separating planar surfaces belonging to obstacles from planar surfaces belonging to a ground surface and obtaining the nonlinear ground surface; a data output interface (3) that outputs the nonlinear ground surface.

1. The name of the design product: taste dish (only white and blue two grid taste dish). 2. The use of the design product: a taste dish for holding various seasonings. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective drawing.

The utility model is suitable for the technical field of main-grid-free back contact cells, and provides a main-grid-free back contact cell, a cell assembly and a photovoltaic system. The main-grid-free back contact battery comprises a cutting area and a plurality of grid line areas, the cutting area is located between two grid line areas, each grid line area comprises a middle area and a first edge area, the first edge area is located on the side, away from the cutting area, of the main-grid-free back contact battery, and a fine grid of the middle area is provided with a plurality of first connecting structures; the fine grid of the first edge region is provided with a plurality of second connecting structures, and the area of the second connecting structures is larger than that of the first connecting structures. By increasing the area of the second connecting structure in the first edge area, the area of the second connecting structure close to the cutting area is larger than the area of the first connecting structure away from the cutting area, and the effect that the pulling force of the cutting area on the welding strip is increased so as to reduce poor connection of the welding strip is achieved.

The present invention relates to a fish farming method implemented in a fish farming installation comprising at least one annular tank (12), the method comprising the following steps: insertion of at least two vertical, horizontally movable, and removable transverse grids (13) into the annular tank, defining a section of said annular tank; transfer of a batch of fish into said section; translation of said at least two grids (13) within the annular tank (12) during the growth and / or maturation of said batch of fish within said section; removal of at least one of said at least two grids (13) after transfer of the batch of mature fish to the outside of said annular tank (12). Figure 8

The application relates to the technical field of water quality monitoring, in particular to a pollutant concentration fitting method based on spectrum, an unmanned intelligent device and application, a plurality of target grid regions are screened out through the pollutant influence similarity of every adjacent two grid regions, meanwhile, sampling redundancy of spectrum data and sampling omission of spectrum data are avoided, and the accuracy of pollutant concentration fitting of sampling spectrum is improved; a first similarity index between a blank grid region and a target grid region is obtained through the pollutant influence similarity of the blank grid region and the target grid region, the accuracy of reconstructed spectrum data of the blank region is improved, and the accuracy of pollutant concentration fitting of sampling spectrum is improved; the key target grid region is resampled through the reconstructed spectrum data of the blank grid region, a fusion fitting model is obtained based on direct inversion and indirect inversion, the interference on spectrum data is reduced, and the accuracy of pollutant concentration fitting of sampling spectrum is improved.

The invention discloses a current harmonic self-interleaving elimination control method and device for a common DC bus parallel grid-connected inverter, and the device comprises two same grid-connected inverter cabinets which are connected in parallel, and each parallel branch of the two grid-connected inverter cabinets is provided with a sensing filtering unit, a hysteresis comparison unit, and a PWM modulation unit. The method comprises the following steps of: simultaneously inputting the same current simulation given quantity into parallel branches respectively connected with two same grid-connected inverter cabinets which are connected in parallel, independently carrying out hysteresis control on each parallel branch, and finally driving the two grid-connected power cabinets to output current through sensing, filtering, hysteresis comparison and PWM (Pulse-Width Modulation) links, switching harmonics of output currents of the two grid-connected power cabinets are naturally distributed in a staggered mode due to the self-stabilization effect. The method does not depend on any synchronous or communication mechanism, and the current on the parallel branches of the two grid-connected inverter cabinets is automatically staggered and connected in parallel, so that the total harmonic distortion of the total grid-connected current is reduced, and the reliability is ensured while the system design is simplified.

The present invention discloses a method and apparatus for generating a digital model. The method comprises: obtaining overall point cloud data of the object under test based on at least one set of images of the object under test; gridding the overall point cloud data at at least two different resolutions to obtain at least two grid models of the object under test; and synthesizing the at least two grid models to generate an overall grid model with multiple resolutions. The present invention solves the technical problem in the prior art of using split-mode scanning, which reduces the efficiency of scanning the object under test and thus prevents the efficiency of generating a digital model from being improved.

The invention discloses an anisotropic well seismic ray shortest path fast tracking method comprising the following steps: S1, data preparation: S11, picking up a velocity gradient maximum value and a velocity gradient minimum value; s12, dividing the speed model into uniform grids at equal intervals; s13, initializing an observation system; s14, initializing a grid node; s2, processing a single grid obtained by subdivision, and constructing a distance table of a single grid node, an inclination angle table of ray paths of two grid nodes in the grid node and two trigonometric function tables of different ray inclination angles; determining an effective propagation range of the sub-wave source; and S3, carrying out anisotropic ray tracing. According to the method, the calculation speed of the in-well earthquake shortest path ray tracing algorithm of the anisotropic medium is greatly improved on the premise of ensuring that the precision is not influenced.

The present invention discloses a multi-physics numerical calculation method for an on-chip device loaded with a ferrite thin film, belonging to the fields of integrated circuit technology and computational electromagnetics. First, a hybrid grid meshing is performed on the on-chip device loaded with the ferrite thin film; then, each field component of the three physical fields is arranged in the discrete space; finally, according to the coupling relationship of the three physical fields, the physical field equations are solved and the parameter transfer between the equations is carried out. According to the structural characteristics of the on-chip device, the present invention combines two grid encryption technologies in the conventional FDTD space, significantly improving the modeling accuracy; according to the multi-physics phenomena faced by the on-chip device, on the basis of solving the Maxwell equation by FDTD, the LLG equation and the heat conduction equation are coupled and calculated, and reasonable parameter transfer is carried out, completely restoring the electromagnetic field phenomena, the magnetization and demagnetization processes of the ferrite thin film and their thermal effects when the on-chip device is working, and effectively improving the simulation accuracy of the calculation method for the target.

The application discloses a method for analyzing the interaction of multiple grid-connected inverters based on matrix norm theory, and aims at the interaction between grid-connected inverters, takes a power distribution system containing two grid-connected inverters as an analysis object, establishes an equivalent grid-connected model containing two inverters based on the Norton theorem, derives a transfer function matrix of a control system, and quantitatively analyzes the relationship between the interaction between inverters and the system frequency, equivalent grid-connected inductance and controller combination mode based on the spectral norm and condition number of the transfer function matrix, so as to provide a reference for the coordinated control of the inverters. A simulation model is built in Matlab / Simulink for analysis. The application provides a simple and effective method for analyzing the interaction of inverters, and provides a theoretical method for the coordinated control of the inverters.

The present invention relates to a multi-fidelity fluid data fusion simulation modeling method, device and equipment. The method comprises: obtaining the factory fluid data of equipment parts and the fluid data of equipment parts in a simulation environment stored in a multi-fidelity file. The two data are sampled respectively using the Latin hypercube algorithm, and low-fidelity wall grid data and high-fidelity wall grid data are output, and a kernel coupling matrix is ​​constructed based on the two grid data. The multi-fidelity data obtained by merging the two grid data is used as a sample data set and input into a multi-fidelity Gaussian regression simulation model constructed based on the kernel coupling matrix. The kernel coupling matrix is ​​solved using a radial basis function kernel function to obtain a sample data set to be evaluated. After the sample data set to be evaluated is verified by a preset error evaluation index, real fluid data is obtained. The use of this method can improve the production efficiency of high-performance equipment parts.

The application provides a camera-based crowd heat map generation method and system. First, each real-time image taken in a monitoring area is subjected to grid processing, and the number of people in each unit grid is obtained to generate a first two-dimensional grid map. Then, each first two-dimensional grid map belonging to the same time range is mapped from an image coordinate system to a world coordinate system to obtain a second two-dimensional grid map. Each unit grid in each second two-dimensional grid map includes the number of people, the grid position and the overlap count. Then, for any two grid maps, if there is an overlap area, the count value of all unit grids located in the overlap area is increased by 1. Then, the number of people in each unit grid is corrected based on the overlap count of each unit grid to obtain the corrected number of people. Finally, a two-dimensional crowd heat map is obtained based on the number and position of people in all second two-dimensional grid maps with the corrected number of people. The number of people obtained by the application is more accurate.

The utility model provides an arc extinguish chamber and a switch unit, and relates to the technical field of low-voltage electrical appliances, the arc extinguish chamber and the switch unit comprise an installation support and a first grid sheet group and a second grid sheet group which are arranged on the installation support, the first grid sheet group comprises a plurality of X-direction grid sheets which are arranged at intervals along the Y direction, the second grid sheet group comprises a plurality of Y-direction grid sheets which are arranged at intervals along the X direction, and the X-direction grid sheets are arranged at intervals along the Y direction. The X direction is perpendicular to the Y direction; at least one Y-direction grid piece is connected with any X-direction grid piece with the projection overlapped in the Z direction, the Z direction is the direction perpendicular to the grid piece face of the Y-direction grid piece, and an angle a is formed between the Z direction and the X direction. By arranging the two grid sheet groups with different arrangement directions, the number of the grid sheets can be increased under the same volume, and the arc extinguishing capability of the arc extinguishing chamber is improved; and the X-direction grid sheets and the Y-direction grid sheets are connected to form equal-phase connection, so that electric arcs can enter the grid sheets more easily, the breaking capacity of the arc extinguish chamber is improved, and the electric service life of the arc extinguish chamber is prolonged.

The utility model provides a reuse lattice of a cross belt sorting machine, which belongs to the technical field of parcel sorting, mainly aims at solving the problem that parcels are easy to fall into the lattice by mistake after the speed of the sorting machine is increased, and comprises a chute plate which is divided into a plurality of lattice falling sections A and B at equal intervals, two groups of fixed grid plates are arranged at the tops of the chute plates in each group of A + B intervals, and a swing arm grid plate is arranged between the fixed grid plates and comprises a rotatable rotating shaft, a grid plate baffle, a mounted bearing and a grid plate connecting piece; the swing arm grid opening can control the parcel sliding interval through resetting or the swing arm, so that the parcel can fall into the corresponding grid opening, each grid opening corresponds to two grid opening piece falling intervals, equivalently, the grid opening piece falling interval of the adjacent area is temporarily borrowed, the piece falling interval of the grid opening is doubled, and the probability that the parcel falls into the wrong grid opening is reduced.

The utility model provides a photovoltaic cell test piece and a photovoltaic cell test system, and relates to the field of photovoltaic technology. The test piece comprises a battery piece, a plurality of groups of welding strips and two grid line units, the number of each group of welding strips is two, and the two welding strips and the two grid line units are located on the two surfaces of the battery piece respectively; each grid line unit comprises a plurality of grid line structures, each grid line structure comprises a plurality of thin grid lines, and the arrangement direction of the plurality of grid line structures is perpendicular to the arrangement direction of the plurality of thin grid lines; each thin grid line is sequentially provided with a first section, a welding section and a second section, and in every two adjacent grid line structures, the first sections of the thin grid lines in one grid line structure and the second sections of the thin grid lines in the other grid line structure are arranged in an interdigitated mode; the welding sections of the fine grid lines in different grid line structures are different in structure; each welding strip is welded with the welding section of each thin grid line in the same grid line structure, and the positions of the two welding strips in the same group are the same. According to the photovoltaic cell test piece, the test workload is reduced.

The application discloses a line-shaped slope map spot extraction method and system with a width less than or equal to 1 grid and a storage medium, and relates to the field of land resource management. Firstly, spot points are generated in a slope classification map to obtain all boundary node coordinate information of a polygon, all coordinate point combinations are calculated according to the coordinate information, all points are compared with existing nodes, then rectangular spots with a side length of two grid widths or more are found and marked in the spot area, the above process is repeated until all spots are traversed, finally, spots with qualified rectangles are removed, and the remaining spots are line-shaped slope map spots with a width less than or equal to 1 grid. The application does not need to rely on complex polygon geometry width calculation, avoids large errors and low efficiency problems of manual visual interpretation, provides a reliable basis for subsequent merging of spots according to the average allocation principle, guarantees the quality of slope classification map results, and supports the scientificity and accuracy of natural resource management decision-making.

The invention provides a semiconductor structure and a preparation method thereof, a memory device and electronic equipment. The semiconductor structure comprises a first transistor arranged on one side of a substrate; the first transistor comprises at least two grid electrodes which are sequentially distributed at intervals in the direction perpendicular to the substrate; the semiconductor layer is provided with channel regions which extend along the direction vertical to the substrate and respectively correspond to the at least two grids; and a gate insulating layer disposed between the at least two gates and the semiconductor layer. According to the invention, the electric field of the drain terminal is reduced, the gate-induced drain leakage current is reduced, the retention time is prolonged, and the refresh frequency is reduced.

The invention relates to the field of data processing, in particular to a robot operation data processing method and system based on big data, and the method comprises the steps: calculating the estimated total cost in an A * path planning algorithm, and planning the inspection path of an agricultural robot through the A * path planning algorithm; the calculation method for estimating the total cost comprises the following steps: rasterizing paths in a farmland to obtain a plurality of grids; calculating a jolting index of the grid and a path smoothing index when the current grid is transferred to another grid, wherein the path smoothing index is in negative correlation with a difference value between the jolting indexes of the two grids; and calculating the estimated total cost, wherein the estimated total cost is negatively correlated with the path smoothing index. On the premise of guaranteeing the safety inspection of the robot, the inspection efficiency of the agricultural robot is improved.