19 results about "Data model (GIS)" patented technology

The present application relates to the technical field of water ecological early warning, and discloses a mountain city water ecological safety early warning method based on multi-level division, comprising the following steps: step 1, obtaining multi-source heterogeneous spatio-temporal data of a target mountain city; step 2, identifying topographic and geomorphic units through a topographic analysis algorithm; step 3, constructing a three-level stereoscopic spatial data model for mountain city water ecological safety early warning, which comprises a mountain ecological barrier layer, a water system network layer and a city fusion layer; step 4, converting index values into score values; and step 5, using a weighted summation model to calculate early warning values and a comprehensive early warning index at each level according to the score values and mountain adaptability comprehensive weights, determining an early warning level and generating an early warning result. The present application can realize systematic and stereoscopic quantitative evaluation and dynamic early warning of mountain city water ecological safety, and is helpful to improve the accuracy and applicability of evaluation results in complex mountain environments.

The application provides a space-time model direct positioning method and system based on medium and low orbit satellite fusion, comprising: position rough measurement; constructing a direct positioning scene and a satellite receiving data model; constructing a space-time model of satellite receiving data; deriving a maximum likelihood estimator target function based on a least square estimation criterion; introducing an optimal weight vector, solving the weight vector according to a minimum variance distortionless response criterion, and deriving a target function based on the minimum variance distortionless criterion; drawing a space spectrum diagram according to the target function value, performing spectrum peak search, and determining the position of a ground radiation source. The application reduces the search range and the calculation amount by using the rough estimation result of single satellite direction finding positioning to obtain the direct positioning area to be searched; the space-time direct positioning model based on the angle of arrival and the Doppler frequency shift is established by using Doppler information, high-precision positioning can be realized under low signal-to-noise ratio, and high resolution can still be realized when the ground radiation sources are very close.

The application relates to a power distribution network operation and industry expansion engineering multi-source business data fusion method and system, which comprises the following steps: S1: a unified data access and adaptation platform is constructed to realize full-coverage access of power distribution network operation and industry expansion engineering related data; S2: based on the accessed data, an enterprise-level master data management system covering the whole domain of power distribution network operation and industry expansion engineering is established; S3: a knowledge graph in the field of power distribution network operation and industry expansion engineering is constructed; S4: based on the knowledge graph in the field of power distribution network operation and industry expansion engineering, a whole-process digital process model of power distribution network operation and industry expansion engineering is constructed based on business process management technology, and intelligent management of the business process is realized; and S5: based on the knowledge graph in the field of power distribution network operation and industry expansion engineering, a time-space integrated data fusion framework is constructed, business data, geographic space information and time sequence information are deeply fused, and a four-dimensional data model is formed. The application realizes whole-process data fusion and cooperation of power distribution network operation and industry expansion engineering.

The application discloses a kind of mountain torrent disaster dynamic early warning index determination method based on multi-dimensional element coupling, comprising: collecting the real-time and historical risk hidden danger data of associated rainfall station, water level station, flow station, soil moisture station in dangerous area;Combining flood data to construct HEC-RAS two-dimensional grid rainfall model;Determine the flood inundation range by rainfall model simulation, and determine the flood control capacity of specified object, determine mountain torrent disaster early warning rainfall;Introduce river engineering facility hidden danger, early soil moisture content, regional geological data and the multi-dimensional mountain torrent influencing factor in current hydrological state of river channel and construct corresponding data model;Based on a group of dynamic early warning rainfall and coupling associated multi-dimensional mountain torrent influencing factor data model, used to correct initial early warning rainfall threshold, to form dynamic perception mountain torrent disaster early warning index.The application can form dynamic situation perception early warning rainfall index, realize the transition from static risk to dynamic risk.

This invention relates to the field of 3D modeling technology, specifically a construction method for a large cantilevered steel frame canopy based on BIM and 3D scanning. The method includes the following steps: collecting component point cloud coordinates and calculating deformation displacement gradients to construct a 3D data model; extracting reference surfaces and calculating projection distance differences to generate a surface correction model; decomposing node position residuals to calculate correction ratio coefficients and generate offset vector data; and constructing a connection plate constraint model based on the offset vectors to calculate micro-correction values ​​and generate a control coordinate set. In this invention, spatial topography is reconstructed by calculating point cloud displacement gradients; deviation characteristics are mined by extracting reference surfaces and calculating differences to generate deformation parameters; node spatial position residuals are decomposed to identify offset patterns and dynamically calculate compensation ratios; a constrained deformation field distribution matrix is ​​constructed by combining the geometric boundaries of the connection plates; and finally, precise control coordinates are generated to eliminate accumulated positioning errors and interference risks, thereby significantly improving assembly reliability.

This application relates to the technical field of intelligent measurement, and in particular to a method, system, device, and medium for component measurement path planning based on sparse images. The method includes: expanding the boundaries of the sparse image and filling the mask matrix; obtaining 3D visual mask points based on the fine mask; generating an initial sparse point cloud based on the 3D visual mask points; constructing a coarse 3D data model based on the initial sparse point cloud; performing clustering and redundant region removal on the coarse 3D data model; constructing a covariance matrix based on the working area of ​​the effective measurement unit; performing eigenvalue decomposition on the covariance matrix; calculating the camera spatial position based on the surface normal vector field and the preset vertical measurement height; modeling the camera measurement posture using the camera spatial position; performing field-of-view coverage analysis on the working area of ​​the effective measurement unit and the surface normal vector field using the camera measurement posture model; analyzing the scanning spatial position and calculating the optimal path objective function, thereby improving the efficiency of component measurement.

A geotechnical engineering BIM application system based on 3D GIS, belonging to the field of geographic information technology, is characterized by comprising: a geotechnical engineering BIM application analysis subsystem and a geotechnical engineering BIM digital delivery subsystem; performing BIM lightweight processing on various information models obtained through geotechnical engineering investigation and design; providing refined display of engineering geological model layers in the 3D scene; performing pile foundation evaluation analysis and virtual pile layout analysis on engineering geological model layers and pile foundation model layers; editing and processing attribute fields of model layers, performing data modeling on specified attribute fields, rendering and displaying the modeling results in the 3D scene and outputting them; managing and authorizing functions for role information; and setting configuration items for the geotechnical engineering BIM digital delivery subsystem. Advantages: It can effectively combine BIM and GIS, and then use multi-source heterogeneous data for visualization integration, quantitative analysis, collaborative application, and digital management.

This invention discloses a method for constructing a terrain-level basic geographic entity data model, comprising: acquiring surveying and mapping geographic information, including remote sensing images, elevation data, and geomorphic classification data; obtaining terrain rasters based on elevation data from different time phases using remote sensing images; dividing terrain semantic units according to the terrain rasters; extracting terrain change semantic categories of terrain blocks using geomorphic classification data; outputting vector surface boundaries of remote sensing image pairs and terrain rasters labeled with the terrain change semantic categories through a centroid network; obtaining spatial association results between geographic entities and terrain semantic units based on the vector surface boundaries; assigning terrain semantic attributes to entities based on the spatial association results; and constructing a terrain-level basic geographic entity data model through neural symbol fusion. This method utilizes multi-scale signal-to-noise ratio adaptive weighting and hard classification rule constraints to enhance semantic adaptation to terrain changes and improve the accuracy and interpretability of geographic entity data modeling.

This invention provides a method for detecting transmission line temperature based on data model prediction, comprising: acquiring transmission line images, including infrared and visible light images; classifying and storing the images according to geographical information acquired at the time of acquisition; aligning the transmission line images; removing background interference using visible light images; extracting features from the infrared images and storing them as a hierarchical three-dimensional database of temperature gradients and geographical information; constructing a model based on the isolated forest algorithm using the hierarchical three-dimensional database; making predictions using the constructed model; and performing residual analysis on the predicted and actual values ​​to predict fault points and trend changes. By constructing a temperature data information model using temperature data, and using isolated forest outlier detection and gradient change patterns to determine the temperature changes of each tower, the method reflects the fault change patterns of the towers. Through data prediction and analysis, it enables early prediction and warning of potential hazards, rapid screening and prediction, and improves implementation efficiency and practical application significance.

This invention discloses a heterogeneous model multi-view data consistency interaction system based on the XMI standard, including a model element parsing module for parsing model element data in XMI format model files; a graphics information parsing module for parsing graphics data structures in XMI format model files; a view mapping construction module for identifying and extracting extended structure fragments representing view mapping relationships from XMI format model files; and a conversion and standardization module for generating unified model representation data supported by the target platform. An import and verification module is used to import the unified model representation data into the target platform's data model management component, graphics rendering module, and view management module, respectively, and execute a consistency verification mechanism to generate consistency verification records and reports, and update the import status identifier. This invention achieves complete exchange and cross-platform restoration of model data between M-Design and CSM platforms.

The application discloses a kind of photovoltaic power station construction installation precision positioning method, it is related to photovoltaic positioning installation technical field, the application is fused by GIS topographic data, BIM model and field elevation data AI, constructs the three-dimensional fusion datum model containing topography, barrier and preset point position;Unmanned aerial vehicle group is adopted, and it is scanned and collected according to AI planning route zoning, realizes no blind area multi-source data acquisition;Support photovoltaic panel structure briquetting integrated leveling mechanism and automatic protection installation mechanism, can accurately level and self-adapting clamping fixed photovoltaic panel, reduce component damage.The application is verified by unmanned aerial vehicle infrared imaging and artificial sampling double, realizes whole-process closed-loop check filing.The application effectively solves the problems of large deviation, poor flatness, easily damaged components and low construction efficiency in traditional installation and positioning, and can adapt to complex terrain, realize centimeter-level accurate installation, and improve the light efficiency and operation stability of photovoltaic power station.

The application relates to the technical field of monitoring, in particular to a number-real fusion overflow effect monitoring device based on a spatial measurement model, which comprises a main processor, a core monitoring terminal, an overflow monitoring module, a data acquisition layer, a data connection layer, a data analysis layer, an application layer and a power supply unit; the device can fundamentally capture and quantify the spatial dependence and heterogeneity in the number-real fusion effect by integrating professional spatial measurement model engines such as a spatial panel data model, a dynamic spatial model and a nonlinear spatial model, the evaluation result of the overflow effect is more scientific and accurate, the device constructs a full-chain closed loop from multi-source data acquisition, fusion, safe transmission to deep spatial measurement analysis, AI enhanced processing, to visual presentation and decision support, realizes the automation and intelligentization of the monitoring process, and greatly improves the efficiency.

Systems and methods enable geolocation based on environmental conditions using a processor. The processor receives environmental sensor data from an environmental sensor associated with Internet-of-Things (IoT) device. The processor generates an environmental sensor signature representing variation of characteristic of the environmental sensor data over a period of time and accesses environmental data for a meteorological condition in a region over the period time. The processor utilizes a data model to determine, based at least in part on the variation of the characteristic of the environmental sensor data, a degree of correlation between the environmental data at each geographic location in the region, and the environmental sensor signature. The processor determines a particular geographic location having a greatest correlation to the environmental sensor signature to assign as the geolocation of the IoT device.

The application discloses a kind of BIM data processing method and system based on beidou grid code comprising: file analysis module parses BIM data and identifies each electric power physical entity in the BIM data;Conversion coding module extracts the model shape, model size and model geospatial information of each electric power physical entity;According to the model shape, model size generates three-dimensional grid;According to the model geospatial conversion into beidou grid code;Storage correlation module stores entity data into database and saves, establishes correlation with other information of original entity in database through the beidou grid code, carries out fusion management.The BIM data processing method based on beidou grid code provided by the application can effectively solve the fusion search problem of BIM data, by establishing the grid data model based on beidou grid code, meet the fusion management needs of electric power digital asset big data and electric power space-time big data.

The application discloses a kind of robust frequency-modulated stepped frequency ISAR imaging radar velocity estimation methods, belong to radar technical field, first construct multiple frames frequency-modulated stepped frequency data model;Again, the velocity estimation and compensation of rough accuracy are realized using the same frequency point offset estimation of multi-frequency point synthesis;Then, the high-resolution imaging of the coarse resolution distance unit where the special point is located is obtained by the IFFT of intra-frame sub-pulse dimension, and the high-precision velocity estimation and compensation are realized using the high-resolution image of multiple special point synthesis;Finally, ISAR imaging is realized through the FFT between frames.The application realizes the estimation and compensation of velocity gradually using two-step method, first realizes the estimation and compensation of large motion amount by rough estimation, then realizes the residual motion estimation and compensation of high precision by synthesis high resolution;Offset estimation is realized using envelope cross correlation, motion parameter estimation is realized using offset fitting, and the amount of calculation is small;The robustness of algorithm is improved using the characteristics that multiple frequency points are not easily disturbed simultaneously, and the robustness of high-resolution velocity estimation is improved using the motion identity of multiple special points.

The application relates to a dynamic modeling method of an electronic chart product, and belongs to the technical field of marine surveying and mapping. The method realizes unified management of the semantic structure of diversified electronic chart products by constructing an extensible concept dictionary and an element catalog; XSD files are generated based on the element catalog, and a relational database structure suitable for a general geographic information platform is automatically created; and visual rendering conforming to the electronic chart standard is realized through graphic expression catalog. The application realizes compatible adaptation of the electronic chart data model and the basic geographic information platform, solves the problems of loss of hierarchical structure, non-standard symbolization, high manual configuration cost and the like in the application of the electronic chart data in the traditional geographic information system, has the advantages of flexible modeling, high automation degree and strong expansibility, and can effectively improve the fusion and sharing of various marine space information.

Embodiments of the present application disclose a kind of sea surface environment simulation method, device, electronic equipment, storage medium and program, wherein, method includes: the sea surface grid model of target sea area is established;According to the sea surface grid model of the target sea area, the sea surface network hierarchical display data model corresponding to the sea surface grid model is established;According to target view angle parameter, the sea surface network hierarchical display data model is carried out precision processing, and target sea surface network hierarchical display data model is obtained;According to the target sea surface network hierarchical display data model, the initial sea surface simulation model of the target sea area is determined;According to the real sea area environment data of the target sea area, the initial sea surface simulation model of the target sea area is carried out sea wave rendering and color rendering, and the target sea surface simulation model of the target sea area is generated.The technical scheme of the embodiment of the present application can accurately restore the sea surface features of target sea area, improve the precision and reliability of sea surface environment simulation.

The present application belongs to the technical field of three-dimensional geological modeling, in particular relates to a kind of GIS-MPM seamless integration dynamic three-dimensional geological model construction method, this method based on GIS platform secondary development seamlessly integrates GIS with MPM (material point method), utilizes GIS to carry out three-dimensional modeling and three-dimensional visualization, utilizes MPM to carry out geotechnical mass large deformation numerical calculation, simultaneously, it is combined with the mutual conversion technology between elevation grid data model and material point model, and the adaptive technology of material point and background grid, constructs the dynamic three-dimensional geological model that can carry out quantitative display.This method makes up the deficiency in traditional static modeling method, provides effective way for improving three-dimensional geological model quantitative calculation analysis and dynamic simulation display capability, makes three-dimensional geological model truly have "vitality", therefore have certain practical significance and application value.

The embodiment of the application relates to a kind of power grid distribution network grid topology construction methods based on matching electric holographic data model, comprising: obtaining the graphic data of multiple power grid devices in power grid PMS system, the graphic data is converted into topological data, and the topological data is written into graph database;Based on the graph database, identify the transformer substation node in multiple power grid devices and the multiple tower nodes that exist connection relationship thereof;Determine the sag related parameter based on the distance between each adjacent two towers in the multiple tower nodes, and construct the sag line segment function based on the sag related parameter;Based on the sag line segment function, draw the overhead line curve between each adjacent two towers, obtain power grid distribution network grid topology graph.