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49 results about "Coarse mesh" patented technology
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Coarse Wire Mesh is a fence or an obstruction that prevents access and movement. It is made up of pre-crimped carbon steel, spring steel, stainless steel, galvanized mil steel wires or connected strands of fiber or other flexible materials and appears like a net or web possessing woven strands.
Multi-group steady-state neutron transport coarse net node block global efficient solving method and system
ActiveCN121167081ANuclear energy generationComplex mathematical operationsCoarse meshNuclear reactor physics
The invention belongs to the technical field of nuclear reactor physical calculation, and particularly discloses a multi-group steady-state neutron transport coarse mesh node global efficient solving method and system, which effectively fuse and exert the advantages of a coarse mesh node method and a Newton-Kralov method. A general coarse mesh segment transport calculation model suitable for various polyhedral segments is constructed, high-precision and high-efficiency transport scanning calculation is realized under sparse segments, the number of variables is greatly reduced, and the calculation scale of single transport scanning is reduced; a Newton-Kralov subspace global solution framework is established, a global solution variable is selected based on a variable coupling relationship of a coarse network nodal method, a linear equation corresponding to a Newton step length is solved by using a Kralov subspace method, and the Newton step length is used for updating the global solution variable to realize rapid and efficient convergence. On the premise of ensuring the calculation precision, the calculation efficiency is remarkably improved, and the calculation scale is reduced, so that the method is particularly suitable for the problem of large-scale and high-dominance-ratio neutron transportation.
Owner:HUAZHONG UNIV OF SCI & TECH
Display backboard stamping process optimization method and system
PendingCN121980837AHigh precisionImprove efficiencyGeometric CADDesign optimisation/simulationElement modelCoarse mesh
The invention provides a display backboard stamping process optimization method and system, and relates to the technical field of process optimization. According to the method, multi-area differential mesh division is carried out on a plate finite element model, fine meshes are adopted for a high-strain small-curvature area and a high-strain area, rough meshes are adopted for a trimming allowance area, and medium meshes are adopted for other areas. The deformation behavior of the key area is accurately captured, and the reliability of simulation prediction is remarkably improved under the same computing resource. And then, reverse compensation iterative correction and rapid convergence are performed on the initial molded surface based on a springback prediction result to obtain an optimized molded surface model, and source control is directly performed for springback errors, so that the number of times and period of mold testing which traditionally depends on experience are greatly reduced. According to the method, through linkage of simulation and real-time sensing data, dynamic optimization and closed-loop control of the process window are achieved, and the forming quality and production stability of the display backboard are effectively improved.
Owner:江苏金利美工业科技有限公司
Multi-stage sorting device for agricultural products
Owner:HONGJIANG YUANJIANG E-COMMERCE CO LTD
Method for calculating hot spot stress at end part of horizontal rod piece for supporting transverse bulkhead
PendingCN121167897AGeometric CADDesign optimisation/simulationStress concentrationRelative displacement
The invention relates to a method for calculating the hot spot stress at the end part of a horizontal rod piece for supporting a transverse bulkhead, which belongs to the field of ship engineering structure design, and comprises the following steps of: calculating through a coarse mesh finite element to obtain node displacement, and determining the hot spot position at the end part of the rod piece; relative displacements of all the horizontal rod pieces are calculated, and then nominal stresses of all the horizontal rod pieces are calculated; or the nominal stress is obtained directly according to the coarse mesh finite element calculation result; combining each stress concentration coefficient corresponding to each hot spot; and calculating the hot spot stress. The invention provides a hot spot stress simplified calculation method based on a coarse grid calculation result (nominal stress) and a stress concentration coefficient, which is beneficial to improving the evaluation efficiency.
Owner:RES INST 708 OF CHINA STATE SHIPBUILDING CORP
High-order electromagnetic field simulation method based on triangular mesh
The invention discloses a triangular mesh-based high-order electromagnetic field simulation method, and belongs to the field of computational electromagnetism. In order to solve the problems of significant numerical dispersion and phase error accumulation when an existing triangular mesh time domain finite difference method is used for processing a complex geometric structure, the method comprises the following steps: firstly, introducing a first additional loop on a basic triangular mesh, and combining with a first optimization coefficient to construct a high-order model; and a second additional loop is further introduced, and an optimization model is constructed in combination with a second optimization coefficient, so that the phase error is effectively inhibited under the coarse mesh, and high-precision electromagnetic simulation of a large-scale polygon structure is realized.
Owner:ANHUI UNIV
Multi-initial-value partitioned nonlinear inversion method for fracture morphology parameters
PendingCN122634940ACoarse meshNonlinear inversion
The present application relates to a kind of crack morphology parameter's multiple initial value subinterval nonlinear inversion method, it is applied to petroleum technical field, the multiple initial value subinterval nonlinear inversion method for explaining crack morphology parameter based on crack front fiber strain includes: based on three-dimensional displacement discontinuity method, crack front fiber strain calculation model is established;According to crack parameter and the crack front fiber strain calculation model, predicted strain is calculated;According to the strain residual of measured fiber strain and the predicted strain, nonlinear least square inversion model with parameter boundary constraint is established;The crack parameter includes crack half crack length, crack height, crack net pressure in crack, crack vertical offset;Under coarse grid division, multiple initial values are set in parameter feasible region and are carried out parallel optimization, and first candidate solution is obtained;Again with the crack height of the first candidate solution as center, crack height feasible region is recursively divided into multiple subintervals.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Method and device for predicting full-core fouling deposition based on porous medium model
ActiveCN121257118BNuclear energy generationDesign optimisation/simulationCoarse meshPressurized water reactor
The application provides a full-core fouling deposition prediction method and device based on a porous medium model. The method comprises the following steps: S1, modeling a pressurized water reactor core as a porous medium model and performing regular coarse grid division; S2, solving the porous medium model based on a core power distribution obtained in a previous iteration step to obtain a flow field and a phase field distribution at the current iteration step; S3, calculating a fuel rod cladding surface temperature based on the core power distribution and the flow field and the phase field distribution; S4, calculating a phase change mass transfer rate by using a boiling phase change rate model based on the cladding surface temperature and local thermal parameters; S5, calculating a fouling deposition rate by using a deposition model based on total mass balance based on the phase change mass transfer rate; S6, calculating a fouling deposition mass and a boron compound mass according to the fouling deposition rate; and S7, performing neutron calculation by taking the fouling deposition mass and the boron compound mass as input to obtain an updated core power distribution.
Owner:SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD
Layered search three-dimensional airspace path planning method and system based on adaptive resolution grid
The invention particularly relates to a hierarchical search three-dimensional airspace path planning method and system based on an adaptive resolution grid. The method comprises the following steps: constructing a corresponding multi-resolution grid model based on a three-dimensional grid map; global path planning is carried out on the coarse resolution grids, coarse paths of all coarse grid nodes are determined, and a coarse path sequence is constructed; performing non-overlapping segmentation on the coarse path sequence; planning local windows matched with the fine-resolution grids, and determining window entrance and exit points corresponding to the local windows; performing obstacle recognition on each local window based on the fine resolution grid, calling a corresponding path generation strategy according to an obstacle recognition result of the local window, and determining a local refined sub-path corresponding to each local window; and splicing the path information of each local window in sequence to obtain a path planning result. According to the method, efficient and reliable path planning of a large-scale and complex three-dimensional airspace environment can be realized.
Owner:ZHEJIANG SCI RES INST OF TRANSPORT +1
A method for three-dimensional positioning of a seismic source based on multi-channel amplitude ratio
The application discloses a three-dimensional positioning method of a seismic source based on a multi-channel amplitude ratio. The method obtains waveform data of the same event on at least four sensor channels and spatial coordinates of the sensors, pre-processes the waveforms, determines an event window corresponding to the event, extracts amplitude indicators of each channel in the event window and performs channel consistency correction, constructs an amplitude logarithm ratio observation on an arbitrary channel based on an exponential decay model to eliminate a source intensity factor, and further forms a constraint related to a distance difference of the seismic source and the sensor. A redundant channel constraint set is further constructed, and an abnormal channel is down-weighted or removed. A weighted nonlinear least square is used in combination with an iterative reweighted least square or a robust loss function to solve the problem, a residual threshold is determined and is updated with iteration. A plurality of candidate solutions are obtained by solving a multi-initial value or a coarse grid initial value in a preset feasible region, and an optimal solution is output. The method reduces the dependence on the arrival time picking, and can be used for microseismic monitoring, acoustic emission positioning and underground engineering safety monitoring.
Owner:FEICHENG MINING GRP SHANXIAN ENERGY +1
A composite cracking path calculation method based on matrix-free pixel finite element
The application provides a composite cracking path calculation method based on a matrix-free pixel finite element, in which pixels of a composite image are fine meshes of finite elements, and different pixel gray values represent different material components. After coarse-grained of the fine meshes, coarse meshes are formed, the boundaries of the material components are embedded into the interior of the coarse meshes to form embedded boundary elements. The stiffness matrix of the coarse mesh elements is calculated through Gaussian integration, and the overall stiffness is not assembled. The conditional conjugate gradient algorithm is used to solve the node displacement of the coarse mesh. Based on the node displacement of the coarse mesh, the node displacement of the fine mesh is obtained through interpolation, and then the stress of the fine mesh element is obtained. The maximum tensile stress criterion is used as the element failure criterion. After the element is damaged, the element area is regarded as a crack, and corresponding material elements are added to the image boundary to maintain the conservation of mass. The calculation method of the application occupies very little computer memory and greatly reduces the demand for hardware resources for cracking calculation.
Owner:SHANGHAI UNIV
Design method for determining maximum hoisting weight of ultra-thin hoisting beam
This invention relates to the field of electronic digital data processing technology, specifically to computer-aided engineering calculation and numerical simulation data processing technology. This invention discloses a design method for determining the maximum hanging weight of an ultra-thin lifting beam. In incremental iterative solutions, the equivalent stress gradient and strain energy density are extracted in real time to calculate local instability characteristic values. When the rate of change of element strain energy density exceeds a threshold, a mesh reconstruction mechanism is triggered. The nodal displacement field and stress field are extracted as initial boundary conditions. The coarse mesh is split into a fine mesh, and the coordinates of newly added nodes are smoothly interpolated based on the minimum potential energy principle. The local and global mesh degrees of freedom are coupled and assembled to continue nonlinear buckling analysis iterations until the load-displacement curve shows an extreme point. The corresponding load is then extracted as the maximum hanging weight. This invention avoids stiffness matrix singularities and computational divergence caused by distortion of the fixed mesh in local instability regions, ensuring the computational convergence of determining the maximum hanging weight.
Owner:HENAN YULIAN COAL IND GROUP CO LTD
Coarse and fine mesh interpolation method and system for wall turbulence calculation
The invention relates to a thick and thin grid fast interpolation technology for wall turbulence calculation, and aims to solve the problems of large calculation amount and complex implementation process of an existing interpolation method. Half of the minimum grid spacing of the fine grids is used as a judgment standard, and interpolation modes are intelligently switched. For each fine grid point, when the distance between the fine grid point and the nearest coarse grid point is smaller than the standard, the physical value of the nearest coarse grid point is directly given to the fine grid point; otherwise, if the distance is greater than or equal to the standard, interpolation is carried out by adopting an inverse distance weighted average method. According to the method, half of the minimum fine grid scale is defined to serve as a standard for judging whether the fine grid point is directly assigned by the physical quantity on the nearest coarse grid amplitude point or not, and on the premise that it is ensured that physical information is not distorted, the complex calculation problem is simplified. The tedious calculation process in a traditional method is avoided, the algorithm complexity is effectively reduced, and the interpolation calculation speed and efficiency are remarkably improved.
Owner:ZHEJIANG UNIV
Self-adaptive grid generation method and device, electronic equipment and storage medium
ActiveCN121962533AReduce frequent changesrecognition stabilityDigital data protectionKnowledge based modelsCoarse meshHydrology
The invention provides a self-adaptive grid generation method and device, electronic equipment and a storage medium. The method comprises the steps that a water depth prediction field is obtained on a coarse grid through model deduction; the water depth gradient of the coarse grid is calculated, and an encryption index is weighted in combination with the distance to the dike and the prediction uncertainty of the model; performing local encryption on a to-be-encrypted parent unit determined according to the encryption index to generate a subunit; the water depth on the parent unit is transmitted to the subunits to serve as initial water depth, and local fine water depth is obtained on the subunits through model deduction; at the junction, the local fine water depth and the water depth of the coarse mesh are fused; transmitting the water depth of the fused subunits back to the parent unit according to area weighted average, and correcting the water depth of the subunits according to the water depth of the parent unit; and when the parent unit does not change any more, outputting the grid structure at the moment. According to the method, the problems that a grid encryption area is unstable and engineering reusable grids are difficult to output are solved.
Owner:ZHEJIANG YUANSUAN TECH CO LTD
A wind farm wake evaluation method, device, equipment and storage medium
ActiveCN115758935Bovercoming adaptabilityOvercome efficiencyDesign optimisation/simulationICT adaptationCoarse meshPhysical model
The application discloses a kind of wind farm wake evaluation method, device, equipment and storage medium, method includes: constructing physical model and generating coarse grid and fine grid;First calculation result and first flow field are obtained by CFD solution to coarse grid, and first flow field is as the initial flow field of fine grid;Actuator disc parameter is determined according to first calculation result;According to boundary condition, initial flow field and actuator disc parameter, the CFD solution based on actuator disc is carried out to fine grid to obtain second calculation result;Second machine site wind direction is constantly corrected according to second calculation result in second machine site wind direction Actuator disc orientation, until the difference between actuator disc orientation and second machine site wind direction is less than preset threshold, stop correction and obtain the wake parameter in each machine site and preset downstream range.The application corrects actuator disc orientation according to machine site wind direction, can more truly consider the influence of complex terrain and upstream wind turbine wake to downstream wind turbine, improve the accuracy and effectiveness of wind farm wake evaluation.
Owner:WINDEY ENERGY TECHNOLOGY GROUP CO LTD
A bran powder screening and grading device
This utility model discloses a bran powder screening and grading device, belonging to the field of bran powder processing technology. It includes a processing box with a grading and screening mechanism inside and a storage mechanism outside. The beneficial effect of this utility model is that by incorporating the grading and screening mechanism, when the motor is turned on, the rotating shaft drives the base plate to rotate, which in turn drives the connecting rod to rotate the base, connecting pipe, and rotating screen. Multiple sets of the base, connecting pipe, and rotating screen are provided, thus achieving the effect of grading and screening. The stirring blades on the rotating screen help to evenly distribute the bran powder and accelerate its movement within the rotating screen. The fine mesh at the top initially screens out finer bran powder, while the coarse mesh at the bottom further screens out residues from the rice, thereby achieving grading. The screening is very precise, facilitating accurate grading of various components.
Owner:HUBEI WUHE AGRICULTURAL DEVELOPMENT CO LTD
Full-core dirt deposition prediction method and device based on porous medium model
ActiveCN121257118ANuclear energy generationDesign optimisation/simulationCoarse meshPressurized water reactor
The invention provides a method and a device for predicting full-core dirt deposition based on a porous medium model. The method comprises the following steps: S1, modeling a pressurized water reactor core into a porous medium model, and carrying out regularization coarse mesh division; s2, solving the porous medium model based on the reactor core power distribution obtained by the previous iteration step, and obtaining the flow field and phase field distribution under the current iteration step; s3, calculating the surface temperature of the fuel rod cladding based on the reactor core power distribution and the flow field and phase field distribution; s4, on the basis of the cladding surface temperature and the local thermal parameters, the phase change mass transfer rate is calculated through a boiling phase change rate model; s5, on the basis of the phase change mass transfer rate, calculating the dirt deposition rate by using a deposition model based on total mass balance; s6, calculating the deposition mass of the dirt and the mass of the boron compound according to the deposition rate of the dirt; and S7, taking the dirt deposition mass and the boron compound mass as input, and carrying out neutronics calculation to obtain updated reactor core power distribution.
Owner:SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD
A method for calculating steady-state neutron diffusion in a hexagonal assembly pressurized water reactor core
ActiveCN116340709BImprove calculation accuracyImprove computing efficiencyNuclear energy generationDesign optimisation/simulationNeutron diffusionCoarse mesh
The application discloses a kind of hexagonal assembly pressurized water reactor core steady-state neutron diffusion calculation methods, using nonlinear iteration strategy to carry out steady-state neutron diffusion calculation: obtain effective multiplication factor and block average neutron flux density by global hexagonal block coarse mesh finite difference method (CMFD);By local block expansion method (NEM), the accurate neutron flow density of each surface is obtained, the block coupling correction factor is updated to correct the block average neutron flow density obtained by CMFD, to ensure the high-order accuracy of the calculation result;Wherein, local NEM uses the method of conformal mapping, hexagonal block is conformally mapped into rectangular block, and non-physical singular term caused by transverse integration is avoided;Transverse leakage term uses first-order step approximation, and the neutron flow slope is estimated by neutron flux density.The method of the application is suitable for hexagonal assembly pressurized water reactor core physical calculation, has higher calculation precision and calculation efficiency, and meets the engineering application demand of hexagonal assembly pressurized water reactor.
Owner:XI AN JIAOTONG UNIV
A coarse-fine grid interpolation method and system for wall turbulence calculations
The application relates to a coarse-fine grid fast interpolation technology for wall turbulence calculation, aiming at solving the problems of large calculation amount and complex implementation process of an existing interpolation method. Half of the minimum grid spacing of a fine grid is used as a judgment standard to intelligently switch the interpolation mode. For each fine grid point, when the distance between the fine grid point and the nearest coarse grid point is less than the standard, the physical value of the nearest coarse grid point is directly assigned to the fine grid point; otherwise, if the distance is greater than or equal to the standard, the inverse distance weighted average method is used for interpolation. The method simplifies the complex calculation problem by taking half of the minimum fine grid size as the standard for judging whether the fine grid point is directly assigned by the physical quantity on the nearest coarse grid value point, under the premise of ensuring the distortionlessness of physical information. The method avoids the complicated calculation process in the traditional method, effectively reduces the algorithm complexity, and significantly improves the speed and efficiency of the interpolation calculation.
Owner:ZHEJIANG UNIV
Moistureproof experiment cabinet
ActiveCN224180894Uachieve absorptionDehumidification and moisture-proofing effectHeating or cooling apparatusDispersed particle filtrationCoarse meshWater discharge
The utility model relates to the technical field of experiment cabinets, and discloses a moisture-proof experiment cabinet which comprises a cabinet body, the front end of the cabinet body is movably connected with a door plate, a partition plate is fixedly installed in the cabinet body, a placement groove is formed in one side of the door plate at the front end of the cabinet body, and a dehumidification mechanism is arranged in the placement groove; and the dehumidification mechanism comprises a placement shell, the placement shell penetrates into the placement groove, a coarse-mesh filter screen is embedded in the placement shell, and calcium chloride particles penetrate into one side of the coarse-mesh filter screen in the placement shell. According to the damp-proof experiment cabinet, through the design of the placing shell, the coarse-hole filter screen, the calcium chloride particles, the fine-hole filter screen and the storage shell, moisture in the cabinet body is absorbed and decomposed into water to be discharged, the dehumidification and damp-proof effects on the interior of the cabinet body can be continuously achieved, and the situation that medicine in internal equipment is affected and cannot be used is avoided; and waste and property loss are caused.
Owner:XIAN XIAODI STEEL CABINET MANUFACTURING CO LTD
Pixelization mechanical structure generation method based on mask guide conditional diffusion model
The invention relates to the field of mechanical material structure design, and discloses a pixelated mechanical structure generation method based on a mask guide condition diffusion model, which comprises the following steps of: adopting a two-dimensional matrix randomization generation algorithm based on an initial structure and fine adjustment; forming a diversified form of a structure boundary through an expansion-contraction strategy of a coarse grid in the initial stage of generation; contour information of geometric representation of the two-dimensional mechanical structure is extracted and input to a finite element simulation modeling module, and displacement, reaction force and stress node field information of the two-dimensional mechanical structure are obtained; interpolating node field information into field distribution information under a target pixel resolution through a specific algorithm, and calculating physical parameters of each structure; a mask of physical field information generated based on a specific algorithm is introduced in the training stage; and inputting the field information, the scalar information and the control mask in the test set into the trained conditional diffusion model. The method has the advantages that mechanical field information can be fused, the condition control capability is achieved, and efficient pixel-level generation is supported.
Owner:ZHEJIANG UNIV OF TECH +1
Cement container dryer capable of suppressing dust
The utility model discloses a cement container dryer capable of suppressing dust, which relates to the technical field of cement container drying, and comprises a container, a drying mechanism, a transmission component mounted on the outer surface of the container and fixedly connected to the surface of the container, and a coarse mesh cylinder, a fine mesh cylinder and an activated carbon mesh cylinder are respectively mounted in the transmission component. The conveying assembly is arranged on the surface of the container, the ash removing assembly is installed on the conveying assembly and arranged on the surface of the container, the cleaning assembly is installed on the conveying assembly, the ash removing assembly comprises a transverse pipe fixedly connected to the conveying assembly, and an ash discharging piece is installed on the transverse pipe. The drying mechanism can dry the interior of the container, meanwhile, dust is restrained, cement dust is not prone to being attached to the surface of activated carbon to block the pore structure of the activated carbon, the restrained cement dust is not prone to leaking in the transportation process, and the probability that the surrounding environment is polluted and the respiratory tract health of operators is harmed is reduced.
Owner:GUANGZHOU MINGRUI IND CO LTD
Granulation device for master batch
The utility model provides a pelletizing device for master batches, which belongs to the field of pelletizing devices, and comprises a pelletizing box, a discharge pipe, a circular cutter, a driving mechanism, a conveying mechanism and a screening mechanism, in the scheme, a partition plate is arranged for connecting a shock absorber A, and a coarse-hole sieve plate and a fine-hole sieve plate are arranged for screening the master batches, so that the master batches can be conveniently cut, and the quality of the master batches is improved. The belt pulley C rotates to drive the eccentric wheels to rotate, the eccentric wheels rotate to push the fine-hole sieve plate to move, the eccentric wheels rotate to drive the belt pulleys A to rotate, and due to the fact that the transmission belt A is in transmission connection with the two belt pulleys A, the two belt pulleys A rotate at the same time, and the two eccentric wheels can rotate at the same time by rotating the two belt pulleys A at the same time. The two eccentric wheels rotate to respectively push the coarse-hole sieve plate and the fine-hole sieve plate to move, so that the problem that the processing efficiency is reduced due to the fact that additional sieving is needed after the plastic master batch production device in the prior art is used for pelletizing can be solved.
Owner:FOSHAN NANHAI CHENGXIN PLASTIC ADDITIVES CO LTD
Method for predicting residual life of circumferential weld of hydrogen-doped natural gas pipeline
The invention specifically relates to a hydrogen-doped natural gas pipeline circumferential weld residual life prediction method, and relates to the technical field of oil and gas pipeline safety engineering, and the method comprises the steps: interpolating a physical quantity of a parent unit to a subunit through a shape function, and completing the data transmission of a state variable after conservative correction verification. According to the method, a self-adaptive adjustment mechanism based on a hydrogen concentration gradient module value is constructed, and collaborative optimization of prediction precision and calculation efficiency is realized; aiming at a core area with violent hydrogen concentration change at the circumferential weld crack tip of the hydrogen-doped natural gas pipeline, grids are encrypted through recursive splitting and a 2: 1 balance rule, the coupling effect of stress concentration and hydrogen atom aggregation is accurately captured, and the problem of key physical field distortion caused by a traditional fixed coarse grid is avoided; for a far-field hydrogen concentration uniform distribution region, sparse grids are coarsened through pruning, and the number of invalid calculation units is reduced.
Owner:TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO LTD +1
A new type of hardened separator
ActiveCN224415747UIncrease string loading capacityIncrease furnace capacityCoarse meshMechanical engineering
The utility model provides a novel hardening partition board, including the partition board body, the reinforcing core, the reinforcing core is protruding to one side, the coarse mesh surface, the coarse mesh surface sets up in the protruding side of reinforcing core, the fine mesh surface, the fine mesh surface sets up in the concave side of reinforcing core, the coarse mesh surface is several layers, the fine mesh surface is a layer, the middle part position of partition board body is provided with the stringed hole, the stringed hole is the through -hole, the stringed hole sets up in the center position of reinforcing core, the advantage is not only improves the furnace capacity, the heat dissipation is good, and alleviates the labor intensity, reduces the tooling cost.
Owner:ZHENGZHOU JINBO GRINDING TOOLS CO LTD
Method, system, storage medium and equipment for classifying runoff-producing similar regions of watershed
The invention relates to the technical field of hydraulic engineering, and discloses a runoff similar region classification method and system for a watershed, a storage medium and equipment, and the method comprises the steps: collecting and constructing a multi-source data set of the watershed, and the multi-source data set comprises topographic data, soil data, vegetation data and meteorological time sequence dynamic data of the watershed; extracting a river network of the drainage basin, and dividing the drainage basin into a plurality of sub-drainage basins according to river network nodes of the drainage basin; dividing the sub-basins into a plurality of coarse grid units with specific sizes according to the topographic data of the basins; dividing the coarse grid unit into a plurality of fine grid units according to the soil data, the vegetation data and the meteorological time sequence dynamic data of the drainage basin to form spatial hierarchical data; and aggregating the spatial hierarchy data to obtain a plurality of runoff-producing similar regions of the drainage basin. According to the method, through multi-level space division, the features from the river network topology to the underlying surface are finely described, and data of different levels are aggregated, so that the runoff-producing similar region is determined.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Optimization method, device and equipment for three-dimensional mesh processing in geometric modeling and medium
The application relates to a three-dimensional mesh processing optimization method, device, equipment and medium in geometric modeling, wherein the method comprises the following steps: acquiring an initial coarse mesh, converting surface triangles in the initial coarse mesh into a fixed-length binary file; writing the surface triangles in the fixed-length binary file into a surface stream file, reading the surface stream file in batches to perform multi-round surface refinement, and generating a local volume mesh; writing new points in the local volume mesh into a point table file, converting tetrahedrons in the local volume mesh into a tetrahedron stream file; extracting internal edge requests of each tetrahedron and generating an edge key, performing hash slicing and deduplication on the edge key, generating a midpoint for each unique internal edge, performing multi-round tetrahedron refinement based on the generated midpoint, and obtaining a refined volume stream file; and constructing a result external storage mesh file and outputting post-processing information. The whole scheme can significantly reduce the memory occupation peak value in the three-dimensional mesh processing process in geometric modeling.
Owner:HUNAN UNIV
Concrete mortar multi-stage screening device
The utility model belongs to the technical field of screening devices, and particularly discloses a concrete mortar multi-stage screening device which comprises a base and a bottom box, the bottom box is arranged on the right side of the top of the base, a middle box is arranged above the bottom box, and a top box is arranged above the middle box. Supporting rods are fixed between the two sides of the outer portions of the bottom box, the middle box and the top box and the base, and supporting rings are transversely fixed to the lower portions of the inner portions of the bottom box, the middle box and the top box respectively. According to the concrete mortar multi-stage screening device, cement powder is poured into the throwing box of the top box, the throwing box is rotated after a first motor is started, the throwing box with balls is rotated along an annular groove in the top of a supporting ring, large-particle impurities are intercepted through a filter screen with coarse holes, and other materials penetrate through a notch to flow into the throwing box in the middle box; and the materials are continuously screened by the smaller-stage filter screen, and are finally screened by the finest filter screen in the bottom box, so that the problem that the screening filter screen is single is solved.
Owner:LOUDI MINGNENG NEW MATERIAL TECH CO LTD
Raw gas purification device
ActiveCN224186121UImprove cooling effectAffect normal useHollow article cleaningGas purification with selectively adsorptive solidsThermodynamicsCoarse mesh
The utility model relates to the technical field of semi-coke production, and particularly discloses a raw coke oven gas purification device which comprises a fan, an air collection box, a ventilation pipeline and a dust removal piece, the fan is detachably installed on one side of the air collection box, an exhaust cavity is further formed in the side, where the fan is located, of the air collection box, one end of the ventilation pipeline is communicated with the side, adjacent to the fan, in the air collection box, and the other end of the ventilation pipeline is communicated with the dust removal piece. A motor is further arranged in the air collecting box, a cooling piece is installed on the outer side of the ventilation pipeline, an ash scraping piece is arranged in the ventilation pipeline, and a transmission piece is arranged between the motor and the fan and between the motor and the ash scraping piece. The dust removal part comprises a coarse-mesh filter screen and a fine-mesh filter cage, and an adsorption layer is arranged on the inner wall of one side, close to the fan, of the fine-mesh filter cage, so that the problems that raw gas generated during traditional semi-coke production contains a large amount of dust particles, cannot be directly supplied for use and can cause harm to human bodies and the environment are solved.
Owner:XINJIANG OSLANYU TECH ENERGY CO LTD
Water-stone separation gallery for debris flow prevention and control
The invention discloses a water-stone separation gallery for debris flow prevention and control, which comprises a drainage dam, a water-stone separation gallery and a drainage groove, and the water-stone separation gallery comprises a framework, a coarse-hole protective net and a side wall; a buffer filter layer is laid at the bottom of the drainage groove, and a fine hole protective net which is detachably installed on the side wall through a rivet structure is arranged above the buffer filter layer. The device has the functions that the device utilizes the characteristics of fluid, performs multi-stage filtration, screening and energy dissipation on water-soil and water-stone two-phase flow of debris flow through the whole water-stone separation gallery for preventing and treating debris flow, and controls starting of material sources from the source, so that the debris flow is converted into mud-sand water flow, the occurrence of the debris flow can be fundamentally avoided, and the service life of the debris flow is prolonged. Compared with the prior art, the control effect is remarkable, meanwhile, compared with the prior art, the construction cost is greatly reduced, and the gallery has sufficient pressure resistance, shear resistance and block stone impact resistance and can be guaranteed to have sufficient stability.
Owner:KUNMING UNIV OF SCI & TECH +1
Automatic material pumping device for chondroitin pulverizer
The invention relates to the technical field of chondroitin crushers, in particular to an automatic material pumping device for a chondroitin crusher, which comprises a communicating pipe, a support frame I, a support frame II, a vacuum pump, a filter and a material pumping assembly, the material pumping assembly is fixedly arranged on the support frame II and is communicated with the communicating pipe, and the bottom of the material pumping assembly is connected with the vacuum pump. The filtering machine is arranged on the lower portion of the vacuum pump, the material pumping assembly comprises an upper bin, a conical cavity and a lower bin, the wall of the cavity is provided with a first flow channel and a vortex circular seam cavity, tangential micropores are formed in the bottom of the inner wall of the cavity, and a coarse net, a fine net and cleaning blades are arranged in the lower bin. A dynamic protective air curtain or a high-speed vortex is formed on the inner wall of the main material suction cavity through compressed airflow sprayed around the cavity wall at a specific angle, fine powder is remarkably stripped and prevented from being attached to a smooth metal wall surface due to static electricity or slight adhesion, and a small amount of powder possibly attached to and blocking meshes is scraped and removed through airflow driving type self-cleaning blades.
Owner:QINGDAO WANTUMING BIOLOGICAL PROD