Radiation field and administrative division overlapping design method and system

Abstract

The invention belongs to the technical field of nuclear radiation field monitoring, and discloses a radiation field and administrative division overlapping design method, which comprises the following steps of: generating a three-dimensional terrain model; performing real-time rendering and optimization on the model; calculating the grid concentration of the radiation field; and superposing the radiation field data with the GIS administrative region. According to the method, the administrative division boundary data and the radiation field grid data are subjected to cross processing, and the name of the administrative division covered by the radiation field and the number of affected population are given. And the influence range and the change trend of the radiation field can be reflected in a three-dimensional scene more visually. The problem that in a traditional method, the visualization performance is poor due to the fact that a radiation field does not support multi-dimensional display can be solved, and technical support is provided for nuclear emergency command decision making under a nuclear accident.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear radiation field monitoring, and in particular relates to a design method for overlapping a radiation field with administrative divisions. Background Art

[0002] With the utilization of nuclear energy and nuclear technology, the development of nuclear technology has brought huge benefits to human society, and the use of radioactive materials / rays has become more and more widespread. While nuclear energy is widely used, it also hides huge crises and potential hazards. The occurrence of sudden nuclear accidents will not only cause serious economic losses to society, but also cause unpredictable harm to people's health. In the existing technology, the display of nuclear emergency radiation fields is the layered display of administrative divisions and radiation fields on GIS, without analysis between layers and population statistics. In the construction of a three-dimensional visual visualization environment, the key technologies that need to be solved include massive and refined three-dimensional terrain generation and management technology, multi-dimensional stereo expression elements of different styles, model real-time rendering optimization technology, and perspective interaction technology in different scenes. Complex calculations such as nuclear accident radiation field calculations and Gaussian plume diffusion models are used to obtain the activity concentration data of the radiation field grid, and the nuclear radiation concentration field is superimposed on the GIS geographic information.

[0003] Through the above analysis, the problems and defects of the prior art are as follows: In the prior art, the display of nuclear emergency radiation sites is to display administrative divisions and radiation sites in layers on GIS, without performing analysis between layers and population statistics. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a design method for overlapping radiation fields and administrative divisions.

[0005] The present invention is implemented in this way: a radiation field and administrative division overlap design method comprises: Step 1, generating a three-dimensional terrain model; The physical modeling of the real world is based on the embedding of spatial elements in a coordinate space, generally Euclidean space, in which formulas are used to measure distance, direction, and area. First, geographic information is collected, including point elements, line elements, and surface elements. The collected geographic information data is formatted, and terrain features, building locations, lighting information, and weather information are restored in three dimensions based on the formatted data. Step 2: Real-time rendering and optimization of the model: Supported by high-definition satellite remote sensing images, digital elevation models, 3D models, and vector map geographic information data, it uses 3D modeling and real-time rendering technology to present 3D geography and natural environment in three dimensions, and provides professional terrain and spatial analysis, multi-element and multi-temporal image management, and 3D application graphics support technology; through the organization and simulation of real terrain, objects, geography, and target data, it provides users with a highly restored virtual terrain analysis and scene display; Step 3, calculate the radiation field grid concentration: According to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated through a mathematical model, and the spatial radiation field in the environment is calculated using a multi-threaded programming method, and the radiation field formed by the distribution of spatial radiation materials is automatically written into the background database; Step 4: Overlay the radiation field data with the GIS administrative area: The radiation field data in the background database are superimposed with the spatial information of GIS to display the disaster administrative areas covered by the radiation field; the administrative division names and population numbers of the administrative areas covered by the radiation field are further calculated.

[0006] Furthermore, the point elements are: public security, fire protection, emergency center, hospital, emergency assembly point, emergency shelter, etc.; the line elements are: roads, water systems, bridges and culverts, etc.; the surface elements are: residential areas, schools, factories and other important public places with dense populations in the city.

[0007] Further, the three-dimensional terrain model is generated: First, a three-dimensional scene is established. The scene model is constructed by simulating a specific location, and basic geographic information is collected. Based on the situation data model, the spatial drawing tool is combined with OpenGL to complete the drawing of spatial lines in the virtual engine, including solid lines, dotted lines, and arrow lines. The dynamic mesh generation tool and particle generation tool are used to draw three-dimensional VR visual elements, including spheres, ellipsoids, cuboids, and irregular three-dimensional models. Visual elements can be superimposed and displayed independently in the scene. The display of situation elements is divided into different display modes of points, lines, surfaces and volumes. The dynamic drawing and combination of basic tools are used for classified display. The display modes of points, lines, surfaces and volumes are automatically optimized through analysis to adapt to the viewing angle, and the evolution of the situation is dynamically drawn and displayed. Point type: miniature model, three-dimensional target Line type: target trajectory, speed, direction tangent Body type: spatial power range, radiation field range Secondly, user interaction is created in the three-dimensional scene graph. Specifically, Qt (a GUI library) is used to create UI interaction buttons, and related code work is improved to realize roaming operations and user interaction. Users can automatically switch between different perspectives through various interactive options in the virtual scene; by arbitrarily switching from far to near and from near to detailed perspectives, more detailed scene information is provided to operators.

[0008] Furthermore, the model is rendered and optimized in real time: (1) An enhanced quadtree data structure is used to store block terrain data, and a one-dimensional fractal algorithm of the Hilbert space filling curve is used to reduce the number of data queries; (2) Use level of detail model LOD, block texture indexing and multi-resolution texture technology to reduce rendering pressure without reducing display quality; (3) Use multi-core parallel technology to improve the speed of data preprocessing before rendering and solve the problem of delayed loading of terrain blocks in large scenes; (4) GPU multi-stream processor and LOD hybrid scheduling technology are used to optimize memory monitoring and release, achieve dynamic terrain effects, and display changes in elevation and image data caused by environmental changes or interactions between simulation models.

[0009] Furthermore, the radiation field grid concentration is calculated: Firstly, the source term calculation method is combined with the actual source term survey data to form the source term basic data; Secondly, the source term basic data is brought into the radiation diffusion plume model to obtain the radiation field diffusion model; Thirdly, the spatial radiation field in the environment is calculated using multi-threaded programming methods; Finally, the radiation field formed by the distribution of spatial radiation materials is automatically written into the background database.

[0010] Furthermore, the radiation field data is superimposed with the GIS administrative area: Firstly, by extracting boundary data and radiation field grid concentration data, the radiation field edge grid at each moment is extracted to form an envelope coordinate set; Secondly, find the intersection of the envelope coordinate set and the administrative division boundary coordinate set, and find the administrative division area where the intersection point is located; Again, the radiation field data layer is overlaid with the GIS administrative area layer; Finally, the administrative division names and total population covered by the radiation sites are obtained through overlay calculation.

[0011] Another object of the present invention is to provide a radiation field and administrative division overlap calculation system comprising: The model generation module is used to generate a three-dimensional terrain model; to model the real world in a physical way. The basis of modeling is to embed spatial elements in a coordinate space, generally Euclidean space, in which formulas are used to measure distance, orientation, and area; first, geographic information is collected, including point elements, line elements, and surface elements; the collected geographic information data is formatted, and terrain features, building locations, lighting information, and weather information are restored through three-dimensional modeling based on the formatted data; The rendering optimization module is used to render and optimize the model in real time. It uses high-definition satellite remote sensing images, digital elevation models, three-dimensional models, and vector map geographic information data as support to present three-dimensional geographic and natural environments through three-dimensional modeling and real-time rendering technology, and provides professional terrain and spatial analysis, multivariate and multi-temporal image management, and three-dimensional application graphics support technology. It provides users with a realistic virtual terrain analysis and scene display by organizing and simulating real terrain, objects, geography, and target data. The calculation module is used to calculate the grid concentration of the radiation field. According to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated through a mathematical model. The spatial radiation field under the environment is calculated using a multi-threaded programming method, and the radiation field formed by the diffusion of spatial radiation materials is automatically written into the background database. The overlay module is used to overlay the radiation field data with the GIS administrative area; overlay the radiation field data in the background database with the spatial information of GIS to display the disaster administrative area covered by the radiation field; and further calculate the administrative division name and population size of the administrative area covered by the radiation field.

[0012] Another object of the present invention is to provide a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the radiation field and administrative division overlap design method.

[0013] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to execute the steps of the method for designing the overlap between radiation fields and administrative divisions.

[0014] Another object of the present invention is to provide an information data processing terminal, which is used to implement the radiation field and administrative division overlap calculation system.

[0015] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows: First, the present invention cross-processes administrative division boundary data and radiation field grid data to give the names of administrative divisions covered by the radiation field and the number of people affected. The influence range and change trend of the radiation field can be reflected in a more intuitive three-dimensional scene. It can solve the problem of poor visualization performance caused by the radiation field not supporting multi-dimensional display in traditional methods, and provide technical support for nuclear emergency command decision-making under nuclear accidents.

[0016] Second, the expected benefits and commercial value of the technical solution of the present invention after transformation are: It can combine the dynamic changes of the dose field to cumulatively calculate the cumulative dose rates of point, line and surface elements, and automatically screen out areas that need to take iodine, hide and evacuate according to the cumulative dose rate threshold, providing technical support for the formulation of emergency plans.

[0017] Third, the technical solution of the present invention solves the following existing technical problems: 1. Difficulty integrating 3D terrain modeling with real data When integrating complex terrain and multi-source geographic data, existing technologies usually have problems such as insufficient model resolution and unclear expression of spatial features. It is especially difficult to achieve refined three-dimensional scene modeling when dealing with scenes with multiple factors such as buildings, terrain, and weather.

[0018] 2. Low efficiency in rendering large-scale data Faced with massive data such as high-definition satellite images, digital elevation models (DEMs) and vector maps, existing real-time rendering technology finds it difficult to balance global scenes with local details, resulting in high rendering delays and being unable to meet the needs of rapid response to large-scale data in emergency scenarios.

[0019] 3. Insufficient accurate calculation of radiation diffusion field Existing radiation diffusion calculation methods often rely only on a single model or two-dimensional analysis and lack accurate simulation of spatial characteristics, resulting in insufficient accuracy of radiation concentration grid calculations and regional coverage results, limiting scientific decision-making in emergency management.

[0020] 4. The analysis of the superposition of radiation field and administrative division is not comprehensive In traditional methods, the superposition of radiation field data and GIS administrative divisions is mostly static processing, which makes it impossible to dynamically analyze the radiation diffusion process and it is difficult to obtain administrative information of the affected areas (such as population distribution and coverage area) in real time, thus limiting its rapid application in emergencies.

[0021] Significant technological advancements: 1. Realize high-precision 3D terrain modeling and multi-factor integration The present invention combines various geographic elements such as points, lines, and surfaces with satellite images, building locations, lighting, and weather information through a model generation module to generate a three-dimensional terrain model that highly restores the real environment.

[0022] The use of dynamic mesh and particle generation tools supports three-dimensional scene modeling and comprehensive display of multi-dimensional elements, overcoming the problems of insufficient resolution and lack of details in traditional modeling.

[0023] 2. Improve the rendering efficiency and display quality of large-scale data Through the joint optimization of LOD (level of detail) model, multi-resolution texture and GPU multi-stream processor, the present invention significantly improves the real-time rendering efficiency of large-scale three-dimensional scenes.

[0024] The enhanced quadtree data structure and Hilbert curve algorithm are used to optimize data storage and retrieval, solve the delay problem of large-scale terrain data processing, and achieve efficient dynamic display of global and local scenes.

[0025] 3. Accurately simulate radiation field diffusion and grid concentration calculation Using the radiation diffusion plume model combined with nuclear accident source data, the system simulates the dynamic changes of the spatial radiation field, improves computing efficiency through multi-threaded programming, and generates accurate radiation concentration grid data.

[0026] These data are automatically stored in the background database, providing reliable support for subsequent analysis and display, while ensuring the real-time and accuracy of dynamically changing scenes.

[0027] 4. Realize the overlay analysis of dynamic radiation field and GIS administrative division By extracting the intersection of the radiation field grid boundary and the administrative division boundary, the system dynamically identifies the administrative areas affected by radiation and calculates the name, population distribution and area statistics of the radiation coverage area in real time.

[0028] The dynamic diffusion process of the radiation field and the administrative division information are displayed in a linked manner, providing scientific and accurate decision-making support for disaster emergency command.

[0029] 5. Improve the comprehensiveness and interactivity of comprehensive impact analysis The system supports intuitive display of radiation field coverage, impact level and dose distribution (such as evacuation range and iodine administration area) in the form of charts and maps, and allows users to dynamically adjust viewing angles and observe details through an interactive interface.

[0030] The comprehensive analysis function provides efficient technical support for emergency plan design, resource allocation and disaster impact assessment.

[0031] Through technological innovation, the present invention has achieved remarkable technological progress in three-dimensional terrain modeling, radiation field calculation and GIS overlay analysis, which is mainly reflected in the following aspects: Improved accuracy: Multi-element 3D modeling and radiation field simulation improve the authenticity and reliability of data.

[0032] Improved efficiency: The use of multi-threaded computing and rendering optimization technology has greatly improved data processing speed and dynamic display performance.

[0033] Decision support: Through the overlay analysis of radiation field and administrative division, accurate spatial information is provided, providing a scientific basis for emergency command and disaster assessment.

[0034] These advances not only solve key problems in existing technologies, but also promote the widespread application of this technology in areas such as nuclear emergency response, environmental protection, and air pollution monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of a radiation field and administrative division overlap design method provided by an embodiment of the present invention.

[0036] Figure 2 It is a flow chart of a method for overlaying radiation field data with GIS administrative regions provided by an embodiment of the present invention.

[0037] Figure 3 It is a structural block diagram of a radiation field and administrative division overlap calculation system provided by an embodiment of the present invention.

[0038] Figure 4 It is a radiation field-comprehensive impact analysis diagram provided by an embodiment of the present invention.

[0039] Figure 5 It is a statistical diagram of the radiation field influence range-administrative division table provided by an embodiment of the present invention.

[0040] Figure 6 It is a display diagram of the radiation field influence range-administrative division map provided by an embodiment of the present invention.

[0041] Figure 7 It is a dose impact-covert evacuation service iodine area diagram provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] like Figure 1 As shown, in S101, a three-dimensional terrain model is generated.

[0044] Preferably, this step can be implemented with a three-dimensional geographic model as follows.

[0045] First, a three-dimensional scene is established, and a scene model is constructed by simulating a specific location. Basic geographic information is collected. Based on the situation data model, spatial drawing tools are used in combination with OpenGL to complete the drawing of spatial lines in the virtual engine, including solid lines, dotted lines, arrow lines, etc. Dynamic Mesh generation tools and particle generation tools are used to draw three-dimensional VR visual elements, including spheres, ellipsoids, cuboids, irregular three-dimensional models, etc.

[0046] Visual elements support superposition and independent display in the scene, and the display of situation elements is divided into different display modes of points, lines, surfaces, and volumes. The dynamic drawing and combination of basic tools are used for classified display. The display modes of points, lines, surfaces, and volumes are automatically optimized through analysis to adapt to the viewing angle, and the evolution of the situation is dynamically drawn and displayed.

[0047] Point type: miniature models, three-dimensional targets, etc. Line type: target trajectory, speed, direction tangent, etc. Body type: spatial power range, radiation field range, etc. Secondly, user interaction is created in the three-dimensional scene graph. Specifically, Qt (a GUI library) is used to create UI interaction buttons, and related code work is improved to realize roaming operations and user interaction. Users can automatically switch different perspectives in the virtual scene through various interactive options. By switching perspectives from far to near and from near to detailed, more detailed scene information is provided to operators.

[0048] Next, in S102, the model is rendered and optimized in real time.

[0049] Preferably, real-time rendering and optimization of the three-dimensional model can be achieved in the following manner.

[0050] Firstly, with high-definition satellite remote sensing images, digital elevation models, 3D models, vector maps and other geographic information data as support, 3D modeling and real-time rendering technology are used to present 3D geography and natural environment, and professional terrain and spatial analysis, multi-element and multi-temporal image management, 3D application graphics support and other technologies are provided. By organizing and simulating real terrain, objects, geography and target data, users are provided with a realistic virtual terrain analysis and emergency scene environment.

[0051] Secondly, in order to meet the needs of displaying large-scale emergency scenarios, the 3D engine must support both the display of global terrain at the level of thousands of kilometers and the display of local, refined small scenes, which places very high demands on data reading and image rendering. The following methods are mainly used to optimize image rendering speed: (1) An enhanced quadtree data structure is used to store block terrain data, and a one-dimensional fractal algorithm based on the Hilbert space filling curve is used to reduce the number of data queries, thereby solving the problem of processing massive terrain data. (2) Use technologies such as level of detail (LOD), block texture indexing, and multi-resolution textures to reduce rendering pressure without reducing display quality; (3) Use multi-core parallel technology to improve the speed of data preprocessing before rendering and solve the problem of delayed loading of terrain blocks in large scenes; (4) GPU multi-stream processor and LOD hybrid scheduling technology are used to optimize memory monitoring and release, achieve dynamic terrain effects, and display elevation and image data changes caused by environmental changes or interactions between simulation models, thereby improving the realism and credibility of emergency scene simulation.

[0052] Next, in S103, the radiation field grid concentration is calculated.

[0053] Preferably, the radiation field grid concentration calculation can be obtained in the following manner.

[0054] Firstly, the source term calculation method is used in combination with the actual source term survey data to form the source term basic data.

[0055] Secondly, the basic data of source terms are brought into the radiation diffusion plume model to obtain the radiation field diffusion model.

[0056] Again, use multi-threaded programming methods to compile the spatial radiation field in the environment.

[0057] Finally, the radiation field formed by the spatial radiation level is automatically written into the background database.

[0058] like Figure 2 As shown, then, in S104, the radiation field data is overlaid with the GIS administrative area.

[0059] Preferably, the overlay of radiation field data and GIS administrative areas can be obtained in the following manner.

[0060] S201, extracting boundary data and radiation field grid concentration data to extract the radiation field edge grid at each moment to form an envelope coordinate set; S202, finding the intersection of the envelope coordinate set and the administrative division boundary coordinate set, and finding the administrative division area where the intersection point is located; S203, the radiation field data layer and the GIS administrative area layer are superimposed and displayed; S204, obtain the name of the administrative division and the total population covered by the radiation site through superposition calculation.

[0061] In S101, a three-dimensional scene model is first established. By collecting basic geographic information and using the situation data model, a virtual scene is constructed in combination with OpenGL technology. In the virtual engine, with the help of dynamic Mesh generation tools and particle generation tools, solid lines, dotted lines, arrow lines and other spatial lines, as well as spheres, ellipsoids, cuboids and other three-dimensional visual elements are drawn, and multiple situation display modes such as points, lines, surfaces and bodies are supported. The system realizes dynamic drawing from different perspectives by automatically optimizing the display mode. In order to enhance the user experience, the Qt library is used to create a user interaction interface and provide roaming operation functions, allowing users to switch perspectives at will in the virtual scene and obtain detailed terrain information from macro to micro.

[0062] In S102, the rendering of the 3D model is based on high-definition satellite remote sensing images, digital elevation models, vector maps and other data. Through 3D modeling and rendering technology, realistic terrain environments are presented, and complex terrain and spatial analysis are supported. To improve rendering efficiency, an enhanced quadtree data structure is used to store terrain data, and the Hilbert curve algorithm is combined to optimize data query; LOD level of detail model and multi-resolution texture technology are used to reduce rendering pressure; multi-core parallel technology is used to speed up the preprocessing of large-scale scenes; GPU multi-stream processors and LOD hybrid scheduling technology are used to optimize the dynamic update of terrain data, showing terrain and image changes caused by environmental changes, and improving the realism of emergency scene simulation.

[0063] In S103, the calculation of the radiation field grid concentration is based on the source term calculation method. The source term basic data is formed through the actual survey data, and the radiation diffusion plume model is introduced to build the radiation field diffusion model. Subsequently, the multi-threaded programming method is used to simulate the spatial radiation field, and the radiation level data is automatically written into the background database to form the spatial radiation field grid data for analysis. This process ensures the efficiency of the radiation field simulation and the standardization of data storage, providing accurate radiation field concentration distribution for subsequent analysis.

[0064] In S104, the radiation field grid concentration data and administrative division boundary data are first extracted to generate the radiation field edge grid envelope coordinate set at each moment; then the intersection of the envelope coordinate set and the administrative division boundary is calculated to identify the administrative area to which the intersection point belongs. Through layer overlay display, the radiation field coverage area is intuitively displayed, and the administrative division name and total population within the coverage area are calculated. This method provides an accurate spatial analysis tool for environmental impact assessment and emergency decision-making.

[0065] like Figure 3 As shown, a radiation field and administrative division overlap calculation system provided by an embodiment of the present invention includes: The model generation module is used to generate a three-dimensional terrain model; to model the real world in a physical way. The basis of modeling is to embed spatial elements in a coordinate space, generally Euclidean space, in which formulas are used to measure distance, orientation, and area; first, geographic information is collected, including point elements, line elements, and surface elements; the collected geographic information data is formatted, and terrain features, building locations, lighting information, and weather information are restored through three-dimensional modeling based on the formatted data; The rendering optimization module is used to render and optimize the model in real time. It uses high-definition satellite remote sensing images, digital elevation models, three-dimensional models, and vector map geographic information data as support to present three-dimensional geographic and natural environments through three-dimensional modeling and real-time rendering technology, and provides professional terrain and spatial analysis, multivariate and multi-temporal image management, and three-dimensional application graphics support technology. It provides users with a realistic virtual terrain analysis and scene display by organizing and simulating real terrain, objects, geography, and target data. The calculation module is used to calculate the grid concentration of the radiation field; according to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated through a mathematical model, and the space radiation field in the environment is compiled using a multi-threaded programming method, and the radiation field formed by the diffusion of space radiation materials is automatically written into the background database; The overlay module is used to overlay the radiation field data with the GIS administrative area; overlay the radiation field data in the background database with the spatial information of GIS to display the disaster administrative area covered by the radiation field; and further calculate the administrative division name and population size of the administrative area covered by the radiation field.

[0066] 1. Generation of 3D terrain models and scene modeling This system realizes 3D terrain modeling through the model generation module, embedding the spatial elements in the real world into a unified Euclidean coordinate space. The collected geographic information data includes point elements (such as building locations), line elements (such as roads and rivers), and surface elements (such as terrain areas). After formatting, these data are restored using 3D modeling technology in combination with terrain features, building locations, lighting information, and weather conditions, thereby constructing a 3D model of the real environment, providing a high-precision basis for radiation field calculation.

[0067] 2. Real-time rendering and optimization of 3D models The rendering optimization module is responsible for real-time rendering of the generated 3D terrain model and improving the display effect through optimization technology. Supported by high-definition satellite remote sensing images, digital elevation models, vector maps and other geographic information data, it uses LOD detail level model and multi-resolution texture technology for optimization to reduce the rendering calculation load. Based on 3D modeling, dynamic light and shadow processing and simulation technology are used to display complex terrain and natural environment in three dimensions, providing users with realistic virtual analysis and scene display capabilities.

[0068] 3. Calculation of radiation field grid concentration The calculation module calculates the radioactive radiation level and diffusion range based on the nuclear accident source data and the radiation diffusion plume model. This module simulates the diffusion behavior of the spatial radiation field through a mathematical model, uses multi-threaded programming to improve the calculation efficiency, and writes the calculation results to the background database. The radiation concentration data is stored in a gridded form to ensure that the radiation distribution information at different time points and spatial regions can be accurately recorded, providing reliable data support for subsequent superposition calculations and displays.

[0069] 4. Overlay analysis of radiation field data and GIS administrative divisions The overlay module overlays the radiation field grid concentration data in the background database with the GIS administrative division data. The system first extracts the intersection of the radiation field grid boundary coordinates and the administrative division boundary coordinates to identify the administrative areas affected by radiation. Subsequently, the system calculates the names of the administrative divisions covered by the radiation field and counts the total population in the affected areas. These data are intuitively displayed in the form of tables and maps, providing detailed spatial analysis results for emergency management.

[0070] 5. Analysis and visualization of comprehensive impact In the comprehensive impact analysis, the system generates analysis results in the form of charts and maps, including detailed statistics on the radiation field coverage (such as Figure 5 Administrative division table statistics screenshot) and the superimposed map display of radiation field and administrative division (such as Figure 6 ). Users can dynamically switch the display of different time points and radiation intensity ranges through the interactive interface to observe the spatial evolution of the radiation field under different scenarios. Combined with dose impact analysis (such as Figure 7 The system can provide a scientific basis for the government to formulate precise evacuation and protection measures.

[0071] 6. Support for data storage and information data processing terminals The computer device provided by the present invention runs the radiation field and administrative division overlap calculation program through the memory and processor to execute the functional steps of each module. In addition, the computer-readable storage medium ensures that the program can be quickly deployed in different terminals. The information data processing terminal seamlessly integrates the three-dimensional terrain model, radiation field calculation results and administrative division overlap analysis, realizing the full process operation from model generation to real-time calculation and display, and providing users with an efficient and intuitive comprehensive impact analysis tool. Example 1: Nuclear Power Plant Radiation Emergency Response System When a nuclear power plant experiences a radiation leak, it is necessary to quickly assess the radiation spread and impact area in order to provide a basis for emergency decision-making and public evacuation. Traditional methods have slow response speeds and insufficient spatial coverage.

[0072] 1. 3D terrain modeling and scene construction High-definition satellite remote sensing images and digital elevation models (DEMs) are used to construct a three-dimensional terrain model of the area surrounding the nuclear power plant, including terrain features such as the plant area, nearby residential areas, mountains, and rivers.

[0073] Use OpenGL and dynamic Mesh technology to visualize environmental features in the form of points, lines, surfaces, and volumes.

[0074] 2. Calculation of radiation field concentration The radiation diffusion plume model is input with the nuclear power plant leakage source data (such as leakage intensity, duration, etc.) to calculate the radiation field concentration distribution at each time point.

[0075] Multi-threaded computing is used to improve simulation efficiency and generate gridded radiation field distribution data.

[0076] 3. GIS overlay and administrative division analysis The radiation field data were superimposed with the GIS administrative divisions to extract the administrative boundaries and relevant population data of the affected areas.

[0077] The overlay results are updated in real time, and the coverage area and impact range are dynamically predicted based on radiation diffusion.

[0078] 4. Emergency response and visualization Switch between different perspectives through user interaction functions to observe the changes in radiation diffusion in time and space dimensions.

[0079] Output the evacuation plan for the affected area, including information such as traffic diversion routes and distribution of medical resources.

[0080] Rapidly generate radiation impact range and provide accurate spatial decision-making support for government emergency command.

[0081] Reduce casualties and economic losses, and enhance nuclear emergency response capabilities.

[0082] Example 2: Air pollution monitoring and early warning system background The problem of air pollution in urban industrial areas requires real-time monitoring and early warning of pollutant diffusion. The traditional single data model is difficult to meet the needs of regional analysis.

[0083] Implementation process 1. 3D terrain modeling and scene construction Use high-precision geographic data to create a 3D terrain model of the industrial area and its surroundings, including factories, transportation arteries, residential areas, etc.

[0084] Combined with particle generation tools, it simulates the distribution of pollution sources of industrial emissions and creates dynamic atmospheric pollution scenarios.

[0085] 2. Calculation of pollutant concentration field Based on actual monitoring data (such as pollutant emission intensity and meteorological data) combined with atmospheric diffusion models, the diffusion path and concentration changes of pollutants are simulated.

[0086] Use dynamic rendering technology to display the atmospheric pollution distribution scene in real time.

[0087] 3. GIS overlay and regional analysis The pollution site grid data is overlaid with the urban administrative divisions to extract the intersection of the pollution site boundary and the densely populated area.

[0088] The heavily polluted areas and their affected population are calculated based on the pollutant concentration.

[0089] 4. Early warning and governance simulation Through real-time display from multiple perspectives, managers can observe the spread of pollution sources.

[0090] Provides simulation of feasible pollution control options, such as industrial emission reduction solutions or local traffic closure measures.

[0091] Provide real-time data support for environmental monitoring departments to improve the timeliness of pollution incident warnings.

[0092] Help decision makers optimize pollution control plans, improve urban air quality, and reduce health risks for residents.

[0093] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. It can be understood by a person of ordinary skill in the art that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in a processor control code, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium. The device and its modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0094] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for designing overlap between radiation field and administrative division, characterized in that: The following steps are involved: Step 1, generating a three-dimensional terrain model; The physical modeling of the real world is based on the embedding of spatial elements in a coordinate space, generally Euclidean space, in which formulas are used to measure distance, direction, and area. First, geographic information is collected, including point elements, line elements, and surface elements. The collected geographic information data is formatted, and terrain features, building locations, lighting information, and weather information are restored in three dimensions based on the formatted data. Step 2: Real-time rendering and optimization of the model: Supported by high-definition satellite remote sensing images, digital elevation models, 3D models, and vector map geographic information data, it uses 3D modeling and real-time rendering technology to present 3D geography and natural environment, and provides professional terrain and spatial analysis, multi-dimensional and multi-temporal image management, and 3D application graphics support technology; By organizing and simulating real terrain, objects, geography, and target data, we provide users with a realistic virtual terrain analysis and scene display; Step 3, calculate the radiation field grid concentration: According to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated through a mathematical model, and the spatial radiation field in the environment is calculated using a multi-threaded programming method, and the radiation field formed by the diffusion of spatial radiation materials is automatically written into the background database; Step 4: Overlay the radiation field data with the GIS administrative area: The radiation field data in the background database are superimposed with the spatial information of GIS to display the disaster administrative areas covered by the radiation field; the administrative division names and population numbers of the administrative areas covered by the radiation field are further calculated.

2. The method for designing overlap between radiation field and administrative division according to claim 1, characterized in that: The point elements are: public security, fire protection, emergency center, hospital; the line elements are: roads, water systems, bridges and culverts; the surface elements are: residential areas, schools, factories and other important public places with dense populations in the city.

3. The method for designing overlap between radiation field and administrative division according to claim 1, characterized in that: The generating of the three-dimensional terrain model: First, a three-dimensional scene is established. Specifically, a scene model is simulated and constructed, basic geographic information is collected, and based on the situation data model, spatial drawing tools are used in combination with OpenGL to complete the drawing of spatial lines in the virtual engine, including solid lines, dotted lines, and arrow lines. Dynamic mesh generation tools and particle generation tools are used to draw three-dimensional VR visual elements, including spheres, ellipsoids, cuboids, and irregular three-dimensional models. Visual elements can be superimposed and displayed independently in the scene. The display of situation elements is divided into different display modes of points, lines, surfaces and volumes. The dynamic drawing and combination of basic tools are used for classified display. The display modes of points, lines, surfaces and volumes are automatically optimized through analysis to adapt to the viewing angle, and the evolution of the situation is dynamically drawn and displayed. Point type: miniature model, three-dimensional target Line type: target trajectory, speed, direction tangent Body type: spatial power range, radiation field range Secondly, user interaction is created in the three-dimensional scene graph. Specifically, Qt (a GUI library) is used to create UI interaction buttons, and related code work is improved to realize roaming operations and user interaction. Users can automatically switch between different perspectives through various interactive options in the virtual scene; by arbitrarily switching from far to near and from near to detailed perspectives, more detailed scene information is provided to operators.

4. The method for designing overlap between radiation field and administrative division according to claim 1, characterized in that: The real-time rendering and optimization of the model: (1) An enhanced quadtree data structure is used to store block terrain data, and a one-dimensional fractal algorithm of the Hilbert space filling curve is used to reduce the number of data queries; (2) Use level of detail model LOD, block texture indexing and multi-resolution texture technology to reduce rendering pressure without reducing display quality; (3) Use multi-core parallel technology to improve the speed of data preprocessing before rendering and solve the problem of delayed loading of terrain blocks in large scenes; (4) GPU multi-stream processor and LOD hybrid scheduling technology are used to optimize memory monitoring and release, achieve dynamic terrain effects, and display changes in elevation and image data caused by environmental changes or interactions between simulation models.

5. The method for designing overlap between radiation field and administrative division according to claim 1, characterized in that: The radiation field grid concentration is calculated as follows: Firstly, the source term calculation method is combined with the actual source term survey data to form the source term basic data; Secondly, the source term basic data is brought into the radiation diffusion plume model to obtain the radiation field diffusion model; Thirdly, the spatial radiation field in the environment is compiled using multi-threaded programming methods; Finally, the radiation field formed by the diffusion of space radiation materials is automatically written into the background database.

6. The method for designing overlap between radiation field and administrative division according to claim 1, characterized in that: The radiation field data is superimposed on the GIS administrative area: Firstly, by extracting boundary data and radiation field grid concentration data, the radiation field edge grid at each moment is extracted to form an envelope coordinate set; Secondly, find the intersection of the envelope coordinate set and the administrative division boundary coordinate set, and find the administrative division area where the intersection point is located; Again, the radiation field data layer is overlaid with the GIS administrative area layer; Finally, the administrative division names and total population covered by the radiation sites are obtained through overlay calculation.

7. A radiation field and administrative division overlap calculation system for implementing the radiation field and administrative division overlap design method according to any one of claims 1 to 6, characterized in that: The radiation field and administrative division overlap calculation system comprises: The model generation module is used to generate a three-dimensional terrain model; to model the real world in a physical way. The basis of modeling is to embed spatial elements in a coordinate space, generally Euclidean space, in which formulas are used to measure distance, orientation, and area; first, geographic information is collected, including point elements, line elements, and surface elements; the collected geographic information data is formatted, and terrain features, building locations, lighting information, and weather information are restored through three-dimensional modeling based on the formatted data; The rendering optimization module is used to render and optimize the model in real time. It uses high-definition satellite remote sensing images, digital elevation models, three-dimensional models, and vector map geographic information data as support to present three-dimensional geographic and natural environments through three-dimensional modeling and real-time rendering technology, and provides professional terrain and spatial analysis, multivariate and multi-temporal image management, and three-dimensional application graphics support technology. It provides users with a realistic virtual terrain analysis and scene display by organizing and simulating real terrain, objects, geography, and target data. The calculation module is used to calculate the grid concentration of the radiation field. According to the nuclear accident source data, combined with the radiation diffusion plume model, the radioactive radiation level is calculated through a mathematical model. The spatial radiation field under the environment is calculated using a multi-threaded programming method, and the radiation field formed by the diffusion of spatial radiation materials is automatically written into the background database. The overlay module is used to overlay the radiation field data with the GIS administrative area; overlay the radiation field data in the background database with the spatial information of GIS to display the disaster administrative area covered by the radiation field; and further calculate the administrative division name and population size of the administrative area covered by the radiation field.

8. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method for designing the overlap between radiation fields and administrative divisions as described in any one of claims 1-6.

9. A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor executes the steps of the method for designing overlap between radiation field and administrative division as claimed in any one of claims 1 to 6.

10. An information data processing terminal, characterized in that: The information data processing terminal is used to implement the radiation field and administrative division overlap calculation system as described in claim 7.

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