16 results about "Surface dynamics" patented technology

The invention discloses a real-time sea clutter simulation method based on a physical neural network, belongs to the field of sea clutter simulation, and particularly relates to a real-time sea clutter simulation method. The invention aims to solve the problems of poor real-time performance and long time consumption of the existing sea clutter simulation method. The method comprises the following steps: S1, initializing parameters and simulation; s2, numerical simulation of sea surface dynamics is realized according to a shallow water equation, and the obtained sea surface height field changing along with time, the flow velocity of the sea surface height field in the axial direction and the flow velocity of the sea surface height field in the axial direction are periodically stored; s3, constructing a physical neural network; s4, obtaining a trained physical neural network; s5, inputting the space coordinate and the time coordinate of the real-time sea clutter to be measured into the trained physical neural network, and outputting the sum; generating a real-time file in an STL format; and S6, obtaining sea clutter data by using the open source library.

The invention belongs to the field of ecological hydrology and environment simulation, and particularly relates to a complex underlying surface carbon water circulation simulation system. The system core module comprises a multi-source data fusion module, an underlying surface dynamic classification module, a carbon-water coupling process simulation module, a multi-scale response modeling module, a model calibration and intelligent feedback module and a result output visualization and decision support module. According to the method, the defects of an existing model in the aspects of underlying surface complexity, process coupling and scale adaptability are overcome, and the ecological adaptability, scientific interpretation capacity and practical application capacity of a simulation system are enhanced.

This application relates to a marine vortex SAR imaging simulation method, comprising: acquiring marine environmental data of a target marine vortex region; generating a first geostrophic velocity field based on the sea surface dynamic height data, and generating a second geostrophic velocity field based on the three-dimensional temperature data and three-dimensional salinity data; performing a weighted summation of the first and second geostrophic velocity fields according to their respective weight values ​​to generate a composite geostrophic field corresponding to the target marine vortex region; and performing SAR simulation imaging on the target marine vortex region based on the composite geostrophic field to obtain a simulated SAR image of the target marine vortex region. Based on the above method, the problem of unclear details due to resolution limitations in sea surface dynamic height data can be improved; and the characteristics of vortices can be more fully represented, increasing the imaging effect of SAR in marine vortex imaging simulation applications.

The invention relates to the field of hydropower station plant design methods, in particular to a hydropower station plant flooding accident scene construction method and system, and the method comprises the steps: carrying out the three-dimensional modeling of a hydropower station plant, and storing the plant flooding accident scene in a classified manner to obtain a scene database; an adjacent coupling mechanism is added between the elements of the accident scenes in each aspect, and a spanning coupling mechanism is added between the elements of every two accident scenes; when the flooding process is simulated, a CFD model is established to simulate a water flow invasion path and the flooding process in the flooding process, the dynamic state of the free liquid level is tracked through a VOF method, and the flow velocity, the water depth and the pressure distribution are analyzed; and operating and outputting result data of plant flooding. According to the method, the situation that the factory building is flooded is more complete and comprehensive, and the simulation result is more accurate.

The present invention relates to a method for secondary mass distribution in aircraft wing surface dynamics modeling, belonging to the field of aircraft structural dynamics. A method for secondary mass distribution in aircraft wing surface dynamics modeling includes the following steps: Step 1: Divide the finite element model of the aircraft wing surface into two groups of sub-wing surfaces m and n, and output them from the finite element software respectively; Step 2: Project the mass points in the mass distribution input file and the structural nodes in the sub-wing surfaces m and n onto this two-dimensional plane; Step 3: According to the principle that the mass center of mass remains unchanged before and after mass distribution, calculate the mass mi of the mass point Mi during the process of distributing it to the sub-wing surfaces m and n; Step 4: Calculate the process mass and distribute it to the host unit node masses of the sub-wing surfaces m and n respectively; Step 5: Loop through the processes of Steps 2 to 4 for all the mass points in the mass distribution input file, that is, complete the entire process of secondary mass distribution in aircraft wing surface dynamics modeling. The present invention has the following advantages: 1. The modeling efficiency is greatly improved; 2. It meets the requirements of refined aircraft modeling.

The invention discloses a nerve implicit surface dynamic three-dimensional reconstruction method for spacecraft shape and action decoupling, and relates to a nerve implicit surface dynamic three-dimensional reconstruction method. The invention aims to solve the problem that NPMs focus on shape and deformation modeling and cannot directly render a new view angle. The method comprises the following steps: step 1, data acquisition and preprocessing; step 2, static three-dimensional shape coding; step 3, dynamic deformation feature decoupling; and step 4, color rendering. The invention belongs to the technical field of spatial perception, three-dimensional reconstruction and artificial intelligence.

The invention discloses an exploration method based on geological deep soil texture, and particularly relates to the technical field of address exploration, historical drilling data, remote sensing image data and geological radar profile data are fused, a geological stability response grid is generated, a surface dynamic load path is collected in combination with a construction plan, and a surface vibration risk area is identified; checking and adjusting an initial drilling point layout scheme through cross analysis; a disturbance response index is predicted based on geological physical parameter fluctuation, a drilling sequence is optimized to form a minimum interference path, real-time feedback correction is carried out in the drilling process, and the data precision and the geological structure stability control effect are improved; according to the method, by constructing the geological stability response grid and fusing the dynamic load path, the disturbance sensitive area is accurately identified, the drilling point location and sequence are dynamically optimized, the layout of the structure high-risk area is avoided, the drilling disturbance intensity is controlled, the targets of drilling path interference minimization and high stability are achieved, and the precision and safety of geological exploration are improved.

The present application relates to the field of chemical catalysis technology, and in particular to a method for determining the free energy of a surface dynamic process. The method comprises the following steps to determine the free energy of a surface dynamic process of a heterogeneous catalytic reaction: establishing an interface adsorption model; performing molecular dynamics simulation on the molecular phase of the reactants so that the molecules of the reactants reach an equilibrium state; fixing a series of distances between the adsorbed molecules of the reactants and the adsorption sites of the catalyst, and performing constrained molecular dynamics calculations on the system of each fixed distance; analyzing the results of the constrained molecular dynamics calculations to obtain the mean force potential; integrating the mean force potential and the fixed distance using the trapezoidal integration method to obtain the free energy change of the adsorption process. This method can rigorously determine the energy dynamic change process of the adsorbed molecules from the reactant phase to different sites on the catalyst surface. Through the free energy barrier and thermodynamic evaluation of different sites, the optimal adsorption site of the adsorbed molecules on the catalyst surface can be determined.

The invention relates to the technical field of free surface seepage, and discloses a free surface seepage global iterative solution method and system based on an immersive boundary method. The method comprises the following steps: acquiring seepage data such as dam seepage, slope rainfall infiltration and underground water coupling; generating a global computing grid, managing grid encryption / decryption, and recording node coordinates and a topological relation; outputting a water head / pressure field; the geometric accuracy of the free surface is maintained based on the real-time updating of the free surface position of the water head field; processing the constraint of a solid boundary on seepage, and converting a boundary condition into a global unified source item; carrying out global iteration; iterative convergence is judged, and the time step length is adjusted; analyzing the free surface seepage, comparing a global iteration result with an analysis result, and if a comparison result is greater than a preset error value, performing readjustment; and if the error value is smaller than the preset error value, outputting the free surface dynamic evolution video. According to the method, the calculation cost is reduced through global iteration and self-adaptive step length optimization, and efficiency and stability are both considered.

The invention relates to a dynamic tracking measurement method and device for continuous shape adjustment of a mold profile, and solves the problems of feature point determination, profile curvature continuity, feature point adjustment sequence reasonability, adjustment precision and the like during mold profile adjustment. And converting the coordinates of the measured image and the design coordinates of the measured die, calculating the design target position points of the measured die and the optimal corresponding points on the surface of the to-be-measured die, and adjusting the Euclidean distances between all the target position points and the optimal corresponding points to meet error requirements. The device comprises a binocular tracking measurement unit, a mounting bracket, a holder, a computer and a calibration plate, and further comprises a signal generator and two groups of circular mark points which are respectively fixed at the edge position of rigid connection of the molded surface of the mold and on the surface of the molded surface. The method has the beneficial effects that the determination of the optimal control point during mold profile adjustment and the tracking measurement of the mold adjustment process are realized, the number and the positions of the dynamically tracked control points are not limited, and the mold adjustment efficiency and the mold adjustment accuracy are improved.

The invention discloses a space-time coupled surface subsidence dynamic prediction method. The method comprises the following steps: (1) collecting geological mining information of a mining area; (2) dividing a working face by taking a periodic caving step pitch as a division basis, and constructing a time function of each mining unit; (3) constructing the relationship between the surface subsidence sufficiency and the working face mining degree; (4) integrating the time function, the surface subsidence sufficiency function and the probability integral function; and (5) surface dynamic subsidence prediction. By the adoption of the method, the mining degree of the working face can be calculated according to the mining time and the working face advancing speed, the influence of the surface subsidence lag effect is obtained according to the time influence parameters, and the mining degree, the time lag effect and the surface final-state subsidence prediction method are combined to obtain the surface subsidence value at any moment. The method has rigorous theoretical property and wide applicability, and a scientific basis is provided for mining area surface subsidence prediction, building damage identification and the like.

The invention discloses an interactive four-season scene change clear landscape painting dynamic simulation system, which relates to the technical field of digital media, and comprises a data acquisition and style analysis module for acquiring a clear landscape painting and separating elements to count four-season colors and establish a parameter set; the four-season landscape parameter modeling module is used for constructing a four-season dynamic model and forming a parameter sequence according to a time axis; the dynamic rendering engine module carries an ink renderer, simulates cloud and mist water surface dynamic states and calls elements according to parameters of four seasons; the interaction processing module is provided with touch control, voice and gesture interaction interfaces; the user feedback optimization module is used for recording an operation generation preference report and optimizing parameters; the system resource management module is used for monitoring resources and performing hierarchical cache preloading; and the style consistency verification module is used for comparing the picture with the style library and adjusting parameters to keep the style. The method fits the style of the clear landscape painting, and the dynamic change is natural; the interaction modes are rich, and the immersion is strong; traditional painting digital inheritance is assisted, and user experience and practical value are improved.

The application discloses a kind of satellite image digital surface model automatic construction method considering untextured water area, belong to photogrammetry and remote sensing technical field.The application includes: automatic data preprocessing, generates epipolar image pair;Adaptive stereo matching processing, initial digital surface model is generated by block pyramid matching and domain adaptive calibration;Water area intelligent optimization, state analysis is carried out to water area region, water surface dynamic type is determined and modeling strategy is dynamically selected, error closed loop correction mechanism is introduced, error source is traced back reversely and is locally corrected.The application realizes the dynamic adaptation of water area modeling, cross-domain generalization and self-correction, solves the problem that the precision of existing method decreases and matching fails due to domain offset in complex scenes such as wave water surface and inclined water surface, significantly improves the precision and automation degree of digital surface model of untextured water area, and can be widely applied in digital twin, urban planning, water conservancy monitoring and other fields.

The present invention provides a method and device for assessing the risk of frozen soil thawing settlement that combines dynamic deformation and static index. The method proposes a risk assessment index that combines the dynamic deformation information of the surface and the static simulation information on the basis of the simulation results of the traditional static risk assessment index. The frozen soil surface deformation information is obtained by interferometric SAR (InSAR) inversion, and the static index simulation results are obtained by the thawing settlement index, the risk zoning index and the allowable bearing capacity index. The static index is combined with the dynamic deformation through the analytic hierarchy process to obtain a multi-factor index that considers the freezing and thawing change state of the frozen soil. The present invention attempts to verify the multi-factor index using the assessment results of the existing index and the frozen soil surface deformation data of the study area, which has a certain reference significance for the assessment of permafrost thawing settlement disasters along the infrastructure in the frozen soil area.

The invention relates to the technical field of engine combustion surface testing, in particular to a propellant combustion surface testing system and method based on a double-view-angle X-ray imaging principle. The invention provides a propellant burning surface testing system based on a double-view-angle X-ray imaging principle. The propellant burning surface testing system comprises an X-ray imaging system based on an image intensifier and a high-speed camera and a burning surface dynamic testing system based on double-view-angle X-rays, the burning surface dynamic testing system is composed of two sets of X-ray imaging systems which are completely identical in design and based on an image intensifier and a high-speed camera, and the two sets of systems are arranged in a manner of forming an included angle of 90 degrees. By adopting the propellant burning surface testing system and method based on the double-view-angle X-ray imaging principle provided by the invention, a three-dimensional dynamic burning surface retreating test of a solid rocket engine can be realized, and the accuracy of a test result is improved.

The invention relates to a pressure relief boundary quantification method based on surface dynamic settlement and coal wall stress dynamic evolution, and belongs to the technical field of pressure relief boundary quantification, and the method comprises the following steps: S1, collecting a coal sample of a protected layer of a specific mine, carrying out desorption experiments under different constant load conditions, determining a stress value corresponding to gas rapid desorption, and determining a stress value corresponding to gas rapid desorption; setting the pressure relief critical stress value as a pressure relief critical stress value of the protected coal seam; s2, determining the deformation value of the overlying strata according to the relationship between the pressure relief value and the stress-strain of the overlying strata; s3, determining a mining overlying strata surface settlement value according to the coal seam mining thickness and the overlying strata deformation value; s4, determining the stress distribution rule of the whole overlying strata according to the dynamic settlement rule of the overlying strata surface, and delimiting the evolution rule of the pressure relief boundary based on the definition of the pressure relief boundary; and S5, analyzing the convergence time criterion of the dynamic time function of ground surface settlement, substituting the convergence time criterion into the dynamic evolution function of the three-dimensional pressure relief boundary of the overlying strata, and finally determining the spatial position of the convergence of the pressure relief boundary.