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58 results about "Three dimensional simulation" patented technology

Urban planning design method based on live-action three-dimensional simulation system

The invention discloses an urban planning design method based on a live-action three-dimensional simulation system, relates to the technical field of urban planning, and is used for solving the problem of insufficient technology fusion depth in an existing method. Firstly, an initial data set is formed by collecting multi-source city data; performing cross-modal feature extraction and alignment based on a deep learning model to generate a fusion feature vector; constructing a dynamic three-dimensional city model by using the fusion feature vector, and embedding a GIS spatial analysis module to perform preliminary layout simulation; vR interaction logic is injected into the model, user behavior feedback is simulated, and environment influence indexes are calculated; according to simulation results and index feedback optimization planning parameters, multi-technology collaborative decision making is achieved; outputting an optimization scheme and generating a visual report, and supporting real-time iterative updating; according to the method, the technology fusion depth is remarkably improved, the response delay is shortened to millisecond level, the planning precision is improved, the environmental influence evaluation deviation is reduced, and efficient and sustainable urban planning practice is realized.
Owner:QINGDAO URBAN PLANNING & DESIGN INST

Three-dimensional display method and system for landslide simulation and storage medium

The invention relates to the technical field of three-dimensional simulation, in particular to a three-dimensional display method and system for landslide simulation and a storage medium. The method comprises the following steps: acquiring multi-source monitoring data of a landslide area; performing noise filtering and spatial interpolation on the multi-source monitoring data of the landslide area to obtain preprocessed landslide monitoring data; performing time-space reference unification processing on the preprocessed landslide monitoring data to obtain time-space alignment monitoring data; performing NURBS curved surface modeling based on the space-time alignment monitoring data to obtain an initial landslide three-dimensional structure model; performing finite element mesh adaptive subdivision on the initial landslide three-dimensional structure model to obtain a dynamic landslide mass mesh model; and acquiring current landslide displacement data. According to the method, the problem that updating of the three-dimensional model is delayed in a traditional method is effectively solved, and real-time performance and accuracy of landslide simulation are ensured.
Owner:INST OF GEOMECHANICS

Crystal pulling method and system for fabricating large-diameter silicon single crystal, and silicon single crystal and medium

A crystal pulling method and system for fabricating a large-diameter silicon single crystal, and a silicon single crystal and a medium. The method can comprise: performing global two-dimensional simulation on a crystal pulling process, and acquiring a global temperature distribution, a velocity field distribution and an initial solid-liquid interface value during the crystal pulling process under a preset crystal pulling apparatus and a preset crystal pulling parameter; on the basis of the global temperature distribution and the velocity field distribution, determining a boundary condition, and on the basis of the boundary condition, performing local three-dimensional simulation on the crystal pulling process to determine a target solid-liquid interface value; adjusting the preset crystal pulling parameter until the initial solid-liquid interface value is equal to the target solid-liquid interface value within a threshold range, and using the adjusted preset crystal pulling parameter as a reference crystal pulling parameter; on the basis of the reference crystal pulling parameter, simulating and calculating a simulated defect during the crystal pulling process; on the basis of the simulated defect, iteratively optimizing the reference crystal pulling parameter until the simulated defect meets a preset condition, and using the optimized reference crystal pulling parameter as a target crystal pulling parameter; and fabricating a defect-free silicon single crystal.
Owner:XIAN ESWIN MATERIAL TECHNOLOGY CO LTD

Training data generation method and device, electronic equipment and storage medium

The invention provides a training data generation method and device, electronic equipment and a storage medium. The method comprises the following steps: constructing a three-dimensional simulation environment constrained by a natural language navigation instruction; executing the natural language navigation instruction in a simulation environment corresponding to the three-dimensional simulation environment to verify the construction correctness of the three-dimensional simulation environment; if the navigation route is correct, verifying whether the navigation route described by the natural language navigation instruction is reachable in the three-dimensional simulation environment or not based on a navigation grid corresponding to a ground walkable area in the three-dimensional simulation environment; and if yes, generating training data of a visual language navigation task for the preset intelligent agent according to the natural language navigation instruction and the three-dimensional simulation environment. According to the method and the device, the diversity of the VLN training data and the consistency of the three-dimensional space can be considered, and the accessibility of the path corresponding to the navigation instruction in the three-dimensional environment is ensured while the data diversity is improved.
Owner:SHENZHEN XGRIDS-INNOVATION CO LTD

Full vessel hemodynamic index value based on single measurement

A method for providing patient hemodynamic information includes obtaining a three-dimensional electronic model of the patient's coronary artery, obtaining first and second boundary condition model value sets, and performing first and second three-dimensional computational fluid dynamics (CFD) simulations of the model based on the first and second boundary condition model value sets. For each CFD simulation, a first pressure drop between a first location and a second location of the coronary artery is calculated. The method further includes determining, based on the first and second pressure drops, patient-specific parameters, determining an inflow rate boundary condition based on the patient-specific parameters, performing a third three-dimensional CFD simulation of the coronary artery model based on the inflow rate boundary condition, and calculating, according to the third CFD simulation, a third pressure drop for any location in the coronary artery model.
Owner:COVANOS INC

Three-dimensional simulation showing stand for installation cost construction site

The utility model discloses an installation cost construction site three-dimensional simulation showing stand, and relates to the technical field of installation cost construction site showing, the installation cost construction site three-dimensional simulation showing stand comprises a base, the tops of two supporting frames are rotatably connected with a folding assembly, and the middle part of the folding assembly is movably connected with an adjusting assembly. According to the three-dimensional simulation showing stand for the installation cost construction site, the two damping rotating shafts can be utilized through the folding assembly, the folding plate can rotate into the containing groove relative to the supporting frame, and therefore the folding function of the showing stand is achieved. During transportation or storage, the folding plates can be folded towards the inner side, the displayer is taken down, and the overall size of the showing stand is reduced. Three functions of height adjustment, fine adjustment of the angle of the display and quick assembly and disassembly of the display can be realized through the adjusting assembly, so that the display stand is wide in application range. And moreover, the display is quickly mounted and dismounted, so that the display is more convenient to replace and maintain, and the maintenance time and cost are reduced.
Owner:宋小军

Method and apparatus for generating marker in three-dimensional simulation

This method for generating a marker on a three-dimensional object in a three-dimensional simulation comprises: generating first depth information in pixel units corresponding to a three-dimensional object, on the basis of information on the viewpoint from which the three-dimensional object is viewed; generating a reference plane on the basis of a predetermined statistical value by assigning a weight to the first depth information; on the basis of the reference plane, generating a marker curved surface covering the three-dimensional object; and generating a marker on the marker curved surface on the basis of a user input.
Owner:CLO VIRTUAL FASHION INC

An auxiliary analysis system for ureteroscopy surgery and a storage medium

PendingCN122440309AFlexible ureteroscopyThree dimensional simulation
The application relates to the technical field of surgical intelligent assistance, and relates to an auxiliary analysis system for ureteroscopy and a storage medium. A computer readable storage medium stores a computer program, the computer program comprises program instructions, and the program instructions enable a processor to execute the following steps when the program instructions are executed by the processor: using a medical detection device to perform preoperative examination on a patient for ureteroscopy to obtain preoperative detection information; obtaining a multi-feature fusion image according to the preoperative detection information; introducing a light emission mechanism and a model rendering method to combine the preoperative detection information and the fusion image to construct a three-dimensional model and obtain a three-dimensional simulation model of the patient; and formulating a ureteroscopy scheme based on the preoperative detection information, the multi-feature fusion image and the three-dimensional simulation model to realize surgical auxiliary analysis and guarantee surgical safety. The application forms a closed loop of preoperative examination, information analysis, model construction and scheme formulation, realizes intelligent surgical assistance, and improves surgical safety and success rate.
Owner:HANGZHOU THIRD PEOPLES HOSPITAL (HANGZHOU HUIMIN HOSPITAL HANGZHOU THIRD AFFILIATED HOSPITAL OF ZHEJIANG UNIV OF TRADITIONAL CHINESE MEDICINE)

Electronic warehouse three-dimensional wire binding process

The invention discloses an electronic warehouse three-dimensional wire binding process, which comprises a wire binding tool and a wire binding method, and the wire binding tool comprises a rectangular frame, a nail plate, a wire binding drawing board and a process table; the appearance of the rectangular frame is matched with the structure of an inner cavity of the electronic bin, a nail plate is installed on each face of the rectangular frame, a plurality of positioning columns are arranged on the two sides of the longitudinal center line of each nail plate, and a wire harness channel is formed between the positioning columns. According to the wire binding process, three-dimensional simulation layout of the wire harnesses in the electronic warehouse is achieved, product production and wire harness layout are carried out at the same time, an existing electronic warehouse sequential production mode is changed into a parallel production mode, the production efficiency is improved, and the problems that in existing sequential production, the wiring space is narrow, the wiring consistency is poor due to the influence of manual experience, and the wiring cost is low are solved. And the error rate is high.
Owner:SHAANXI AEROSPACE TIMES NAVIGATION EQUIP CO LTD

Method for simulating skewed pole of high-speed motor stator

The invention discloses a method for simulating skewed poles of a high-speed motor stator, which comprises the following steps of: simulating the offset effect of stator teeth on different sections caused by the skewed poles of the stator by adopting a silicon steel sheet iron core cutting method with a certain inclined cutting angle; constructing a stator core axial groove shape offset model, defining offset of a stator groove on different axial cross sections through parameterization, and performing equivalent final three-dimensional simulation on the performance of the skewed pole motor by adopting a multi-section two-dimensional calculation result; establishing an equivalent skewed pole angle mapping relation; the torque ripple and cogging torque peak-to-peak value change rules under different maximum offsets are analyzed in combination with finite element simulation, the optimal value of the maximum offset is determined with torque ripple maximum suppression or cogging torque maximum suppression as the target, and torque ripple suppression and torque smoothness improvement of the high-speed motor are achieved. On the basis of being compatible with an existing high-speed motor product, the motor simulation skewed pole is achieved through simple process innovation, and the manufactured simulation skewed pole motor stator does not need to be subjected to a stator inner circle accurate grinding process.
Owner:SOUTHEAST UNIV

Three-dimensional display method, system and storage medium for landslide simulation

The present application relates to the technical field of three-dimensional simulation, and in particular to a landslide simulation three-dimensional display method and system and a storage medium. The method comprises the following steps: obtaining multi-source monitoring data of a landslide area; performing noise filtering and spatial interpolation on the multi-source monitoring data of the landslide area to obtain pre-processed landslide monitoring data; performing time-space reference unification processing on the pre-processed landslide monitoring data to obtain time-space aligned monitoring data; performing NURBS surface modeling based on the time-space aligned monitoring data to obtain an initial landslide three-dimensional structure model; performing finite element grid self-adaptive subdivision on the initial landslide three-dimensional structure model to obtain a dynamic landslide body grid model; and obtaining current landslide displacement data. The present application effectively solves the problem of three-dimensional model update delay in the traditional method, and ensures the real-time and accuracy of landslide simulation.
Owner:INST OF GEOMECHANICS

Patient full-dimension intelligent nursing inspection system and method based on virtual reality technology

The invention belongs to the technical field of intelligent nursing, and relates to a full-dimension intelligent nursing inspection system and method for a patient based on a virtual reality technology, and the system comprises a plurality of different types of sensors, virtual reality intelligent glasses, a mobile calculation unit, and a server. The sensor is arranged on an inspection site and is used for acquiring images and data of the inspection site; the virtual reality intelligent glasses are used for establishing a three-dimensional simulation display scene according to the image and data obtained by the sensor; the mobile calculation unit is arranged on the virtual reality intelligent glasses and is used for carrying out single-mode data calculation through an artificial intelligence model according to the image and data obtained by the sensor; and the server is used for fusing the calculation result of the single-mode data through a multi-mode analysis model to generate a full-dimensional intelligent nursing inspection result. The system can realize objectification and standardization of nursing evaluation, establish continuous and preventive monitoring, and achieve full-dimensional comprehensive evaluation.
Owner:PEOPLES HOSPITAL PEKING UNIV

Method and device for calculating hydrological connectivity between river-lake floodplain and main channel, electronic equipment and medium

The present disclosure relates to the technical field of hydraulic engineering, in particular to a method and device for calculating the hydrological connectivity of river and lake floodplain and main channel, electronic equipment and medium, the method comprising: obtaining characteristic cross-section topographic data of the water area to be analyzed; calculating the division boundary of the floodplain and the main channel by the hydraulic depth objective function method; constructing the relationship function of the water area, wet perimeter and water level of the main channel and the floodplain, obtaining the water conveyance capacity function of the main channel and the floodplain; combining the total flow process to obtain the average flow velocity function of the main channel; identifying the start and end time periods of the floodplain hydrological connectivity event according to the water level, flow process and division boundary of the floodplain and the main channel; calculating the exchange volume of water storage and drainage on the floodplain and the entrainment exchange volume respectively, and finally determining the hydrological connectivity of the floodplain hydrological connectivity event. The present disclosure is based on cross-section topography and hydrological process data, and can obtain the hydrological connectivity index without complex two-dimensional / three-dimensional simulation, thereby providing a reliable technical basis for the treatment of the floodplain and the main channel, ecological restoration and engineering scheduling.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION

Metering transformer detection method and system based on visual identification in assembly line

The invention discloses a metering transformer detection method and system based on visual identification in an assembly line, and relates to the technical field of intelligent detection, and the method comprises the steps: obtaining the production quality standard of a metering transformer, dividing key production line nodes, sharing the quality standard, and constructing a quality database; combining the first three-dimensional simulation diagram and the second three-dimensional simulation diagram, respectively carrying out digital pixel conversion of the fault and the operation characteristics, and generating a first digital image and a second digital image; visual detection modules are constructed through mapping of the two modules, and the visual detection modules are distributed and deployed on the edge side of a key node of an assembly line, so that automatic detection management of metering transformer production is realized. The technical problems that in the prior art, real-time high-precision detection of the metering mutual inductor cannot be achieved in a high-speed assembly line environment, and detection delay and missing detection exist are solved, and the technical effects that the real-time detection efficiency and precision of metering mutual inductor production are improved, and the delay rate and the missing detection rate of a high-speed assembly line are reduced are achieved.
Owner:STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER CO

Logistics transportation digital twin system for modular cleanroom

A logistics transportation digital twin system for a modular cleanroom comprises: a three-dimensional model computation module configured to construct three-dimensional models of the modular cleanroom and an automated guided vehicle (AGV); a perception data processing module comprising a plurality of cleanrooms, and each cleanroom comprising a plurality of partition panels configured for rapid assembly to form internal spaces and external areas; a perception data processing module configured to sense cleanroom parameters of the modular cleanroom and operational parameters of the AGV, so as to generate corresponding cleanroom perception data and operational perception data; a digital twin module configured to perform simulation computations on the cleanroom perception data and operational perception data corresponding to the three-dimensional models, so as to generate a three-dimensional simulation result; and a visual display module configured to visually present the three-dimensional simulation result.
Owner:LOCUS CELL CO LTD

Data processing method for ecological restoration of high and steep slope based on three-dimensional simulation

The application discloses a data processing method for ecological restoration of high and steep slope based on three-dimensional simulation, and relates to the technical field of high and steep slope restoration, and comprises the following steps: constructing a three-dimensional model of the high and steep slope; establishing a division plane, and obtaining a final analysis intersection on the division plane; obtaining first to fourth coordinate points based on the final analysis intersection, obtaining the height of the three-dimensional model of the high and steep slope at the positions of the final analysis intersection and the first to fourth coordinate points, and marking them as Sz, S1, S2, S3 and S4 respectively; calculating the overall slope, the overall slope direction and the overall concave-convex difference value based on Sz, S1, S2, S3 and S4 respectively; and obtaining the grade of the ecological restoration difficulty based on the overall slope, the overall slope direction and the overall concave-convex difference value. The application is used for solving the problem that the existing high and steep slope restoration technology cannot analyze the restoration difficulty grade according to the three-dimensional data of the high and steep slope, thereby causing the waste of restoration resources and restoration time.
Owner:NUCLEAR IND (TIANJIN) ENG SURVEY INST CO LTD

Feature Extraction System and Method for LiDAR Point Clouds

This invention relates to the field of lidar ranging technology, and more particularly to a feature extraction system and method for lidar point clouds. The system extracts feature information from the current three-dimensional point cloud voxel tensor and the pulse signal from the previous moment to obtain the current three-dimensional simulated input current. Based on the current three-dimensional simulated input current of the neuron and the previous simulated membrane potential value, an adaptive threshold is used to control the neuron's output of the current discrete pulse signal. Based on the discrete pulse signal, the simulated membrane potential values ​​of adjacent moments are sparsely aggregated to obtain the output features that fuse the spatiotemporal dynamics and local topological depth attributes of the point cloud data stream. This invention uses an adaptive threshold to preserve the local three-dimensional topological and temporal dynamic information in the three-dimensional point cloud obtained by lidar ranging; and uses a total loss function including temporal balance loss and membrane potential utilization loss to dynamically balance the neuronal activity in the spiking neural network, avoiding abnormal decay or hill effect.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Plastic packaging bottle precise forming method driven by three-dimensional simulation analysis

The invention relates to the technical field of plastic packaging bottle processing, and provides a plastic packaging bottle precise forming method driven by three-dimensional simulation analysis. The method comprises the steps that processing orders are interacted, and basic forming information is extracted to construct a three-dimensional simulation model; fitting production line equipment precision to generate a first forming influence coefficient; setting a molding tolerance bandwidth; deriving a three-dimensional simulation model based on the influence coefficient and the tolerance bandwidth; processing the sample according to preset parameters; a multi-point image is used for collecting a simulation forming sample; matching the derivative model to obtain a target model; performing twinborn analysis to generate adjustment parameters; and forming of the target plastic bottle is controlled. The technical problem that in the prior art, adjustment is conducted only according to a three-dimensional simulation model of a finished product during machining, the influence of the machining capacity of a machining production line is ignored, and consequently the control efficiency is low is solved, the machining capacity of the machining production line and the finished product quality tolerance interval are comprehensively considered, forming adjustment parameters are determined, and the control efficiency is improved. Therefore, the control efficiency is improved.
Owner:NANTONG SIZE PLASTIC CO LTD

Dual-domain tracking of target structures

The embodiments described herein provide a probability distribution for determining the matching of 3D points in a template feature map with 3D points in space. A dual-domain target structure tracking end-to-end system receives one-dimensional or two-dimensional projection data and a 3D simulated image. The end-to-end system extracts a template feature map from the simulated image using segmentation. The end-to-end system extracts (206) features from the projection data, transforms the features of the projection data into a 3D space, and sorts the 3D space to generate a 3D feature map. The end-to-end system compares the template feature map with the generated 3D feature map (210) to determine (212) the instantaneous probability distribution of the template feature map appearing in the 3D feature map.
Owner:SIEMENS HEALTHINEERS INTERNATIONAL AG

A 3D simulation-driven method for precision molding of plastic packaging bottles

This application relates to the field of plastic packaging bottle processing technology, providing a method for precise molding of plastic packaging bottles driven by three-dimensional simulation analysis. The method includes: interactive processing orders to extract basic molding information and construct a three-dimensional simulation model; fitting the precision of the production line equipment to generate a first molding influence coefficient; setting a molding tolerance bandwidth; deriving a three-dimensional simulation model based on the influence coefficient and tolerance bandwidth; processing samples according to preset parameters; acquiring simulated molding samples using multi-point images; matching the derived model to obtain a target model; generating adjustment parameters through twin analysis; and controlling the molding of the target plastic bottle. This application solves the technical problem of low control efficiency in existing technologies that adjust based solely on the three-dimensional simulation model of the finished product, ignoring the influence of the processing line's own processing capacity. It achieves improved control efficiency by comprehensively considering the processing line's processing capacity and the finished product's quality tolerance range when determining molding adjustment parameters.
Owner:NANTONG SIZE PLASTIC CO LTD

A Three-Dimensional Simulation Method for Ore-Forming Fluids Based on Multi-Field Coupling Effect

This invention relates to the field of computer-aided engineering applications in geological science, and particularly to a three-dimensional simulation method for ore-forming fluids based on multi-field coupling effects. The method includes the following steps: acquiring and calculating critical temperature thresholds based on viscosity-temperature response for grid cells in a three-dimensional geological grid model data, then classifying the grid cell states to obtain grid state labeling data; expanding geological grid attributes based on the grid state labeling data to obtain a viscosity-temperature partitioned grid; constructing a simulation environment using the viscosity-temperature partitioned grid and extracting temperature thresholds to form comprehensive temperature threshold data; detecting state changes in the comprehensive temperature threshold data to obtain state-change cells; and analyzing and recording pulse events in the viscosity-temperature partitioned grid to obtain flow pulse event sequences. This invention, through computer-aided engineering recording of fluid migration phenomena, significantly improves the scientific rigor and accuracy of ore-forming target area prediction.
Owner:XICHANG COLLEGE

Zipper simulation method, device and equipment and readable storage medium

The invention provides a zipper simulation method, device and equipment and a readable storage medium, and the method comprises the steps: setting a zipper model as two independent rigid body assemblies including a puller and a zipper pull, enabling the puller and the zipper pull to keep the shape unchanged in a three-dimensional simulation process, enabling the puller to correspondingly move according to the motion state of a plate to which the puller belongs, and improving the simulation precision of the zipper. According to the technical scheme, the three-dimensional model of the zipper can flexibly slide along the zipper tooth path according to the acting force of the zipper pull, and meanwhile rigid body collision and free movement between the zipper head and the zipper pull in the zipper are considered, so that highly dynamic simulation of the zipper is achieved, and the simulation effect of the zipper on the three-dimensional model fits the dynamic behavior of the zipper in the real world.
Owner:LINGDI (ZHEJIANG) TECHNOLOGY CO LTD

Nuclear power system simulation method and device, electronic equipment and storage medium

The invention provides a nuclear power system simulation method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the information of a plurality of operation conditions of a nuclear power system, the information of the operation condition comprises equipment involved in the operation condition, a connection relation between the equipment involved in the operation condition and operation parameters of the operation condition; constructing a three-dimensional simulation model corresponding to each operation condition according to the information of each operation condition in the information of the multiple operation conditions; and performing three-dimensional simulation on each operation condition through the three-dimensional simulation model corresponding to each operation condition. Due to the fact that the three-dimensional model can more visually display the operation conditions of the equipment under all the operation conditions, the simulation effect of the three-dimensional model is closer to the actual condition compared with a two-dimensional flow chart and is more visual, and then the analog simulation effect of the nuclear power system can be improved.
Owner:HUALONG PRESSURIZED WATER REACTOR TECH CORP LTD

Three-dimensional simulation method based on power transmission angle steel tower segmentation assembly construction

The invention relates to the technical field of power transmission tower construction simulation, and discloses a three-dimensional simulation method based on power transmission angle steel tower segment assembly construction. According to the method, geometric design data and material attribute data of angle steel tower segmented components are obtained through a parameterized modeling platform, and a three-dimensional digital model containing connection node information is constructed. And importing the model into a construction planning system, carrying out segmented assembly sequence planning according to construction process specifications, and generating a construction simulation scene comprising hoisting equipment parameters, hoisting path space constraints and temporary support layout. Inputting the construction simulation scene into a physical simulation engine to execute dynamic three-dimensional simulation, and calculating the motion trail, the mechanical response and the collision interference condition of the segmented component in the hoisting process. And the hoisting sequence and path parameters are adjusted and optimized through the construction feasibility analysis module. And inputting the optimized construction scheme parameters into a three-dimensional rendering system to generate a final three-dimensional construction simulation animation and detailed construction guidance data.
Owner:ZHONG TIE CHENG JIAN JI TUAN HUA DONG JIAN SHE YOU XIAN GONG SI

Construction collision prediction and analysis method under three-dimensional scene

The application discloses a construction collision prediction and analysis method in a three-dimensional scene and belongs to the technical field of underground construction detection. The method comprises the following steps: acquiring three-dimensional simulation scene data, correcting the error caused by ground subsidence by taking a building with unchanged height as a reference, determining the specific depth of an underground component and constructing a collision body; constructing an envelope body based on the longest side length of a non-visible three-dimensional model component; for a pipeline beyond a construction area, cutting the envelope body by using a spherical section of a true construction range to reduce the analysis range; dynamically cutting the collision body into a plurality of collision elements in a specified distance unit, performing pre-collision and point-by-point collision calculation on the envelope body after screening, and obtaining a point set of intersection; and finally responding to a terminal instruction to dynamically display a construction risk position in three dimensions. The application combines ground error correction, pipeline accurate cutting and dynamic cutting, eliminates a large amount of redundant data, and significantly improves the accuracy and analysis efficiency of construction collision prediction in a complex underground environment.
Owner:DMS CORP

Feature extraction system and method for lidar point clouds

The application relates to the technical field of laser radar ranging, in particular to a laser radar point cloud feature extraction system and method, feature information is extracted from a three-dimensional point cloud voxel tensor at a current moment and a pulse signal at a previous moment respectively, and a three-dimensional simulation input current at the current moment is obtained; according to the three-dimensional simulation input current at the current moment and a membrane potential simulation value at the previous moment of a neuron, a discrete pulse signal at the current moment is output by using an adaptive threshold value to control the neuron; according to the discrete pulse signal, sparse aggregation is carried out on the membrane potential simulation values at adjacent two moments, and output features of fused point cloud data stream space-time dynamics and local topological depth attributes are obtained. The application retains local three-dimensional topologies and time dynamic information in three-dimensional point clouds obtained by laser radar ranging by using an adaptive threshold value; a total loss function including a time balance loss and a membrane potential utilization loss is used to dynamically balance neuron activities in a pulse neural network, and abnormal attenuation or hill effect is avoided.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Apparatus for managing storage and method thereof

An apparatus may provide a controller, and a memory configured to store at least one instruction. The at least one instruction when executed by the controller, may cause the apparatus to receive, from a user device, a request for storage information, the request including at least one of storage company information, branch information, or space information for each branch; transmit, to the user device and based on the request, the storage information, receive, from the user device, an experience request for at least a storage of a plurality of storages associated with the storage information, and transmit, to the user device and based on the experience request, experience information for the storage, wherein the experience information may include a three dimensional simulation result associated with the storage.
Owner:HYUNDAI MOTOR CO LTD +1

Plateau area construction monitoring system based on unmanned aerial vehicle and three-dimensional simulation technology

The invention discloses a plateau area construction monitoring system based on an unmanned aerial vehicle and a three-dimensional simulation technology. The system is especially suitable for construction whole-process digital management in a plateau complex environment. Comprising an unmanned aerial vehicle platform carrying multiple sensors, a three-dimensional modeling module, a data processing module and a monitoring terminal. The unmanned aerial vehicle obtains high-precision topographic data and constructs a digital twin reference model; the data processing module recognizes safety equipment in real time based on an AI visual algorithm, monitors the temperature of the frozen soil roadbed, and early warns geological disasters through the GIS + Beidou technology; the monitoring terminal integrates construction progress analysis, quality detection and operation and maintenance path planning functions. According to the invention, through full-process digital management of "before-construction-in-construction-after-construction", the core problems of severe plateau climate, complex geology and the like are solved, and the construction efficiency and safety are improved.
Owner:HUADIAN NEW ENERGY GROUP CO LTD TIBET BRANCH +1

Projection media three-dimensional simulation and extrusion

A three-dimensional (3-D) projection system includes a projector configured to output a projection of light to simulate a 3-D object, an opaque surface configured to receive the projection of light to simulate a portion of the 3-D object on the opaque surface, and a translucent scrim disposed at a boundary of the opaque surface and configured to receive the projection of light to simulate an extension of the 3-D object away from and beyond the boundary of the opaque surface.
Owner:UNIVERSAL CITY STUDIOS LLC

Method for identifying mechanical properties of composition phases of multiphase material

The invention relates to a method for identifying the mechanical property of each composition phase of a multiphase material, which comprises the following steps: firstly, pretreating the surface of a material to be detected, obtaining grain orientation and grain boundary distribution through EBSD, selecting an indentation position in a target phase single grain, and implementing a nanoindentation experiment to obtain a load-displacement curve; then, scanning the three-dimensional morphology of the indentation through AFM, and extracting the depth of a feature point; establishing a single crystal three-dimensional nanoindentation CPFEM model, endowing crystal orientation measured by EBSD, and simulating to obtain a curve and morphology depth; fitting an experiment curve and a simulation curve by using a parabolic function to obtain a characteristic coefficient, and incorporating the characteristic coefficient and the morphology depth into a back analysis objective function; and finally, carrying out back analysis by adopting a global optimization algorithm to solve crystal plasticity parameters, and outputting a single crystal constitutive parameter set. Compared with the prior art, through curve and morphology double-information constraint and three-dimensional simulation, the deviation of a traditional method is overcome, the parameter identification precision and reliability are improved, and the method is suitable for multi-phase materials such as high-strength steel and titanium alloy.
Owner:SHANGHAI JIAOTONG UNIV +1