7 results about "Spherical model" patented technology

The invention discloses a sedimentary facies constraint simulation method and device based on three-dimensional dynamic data, electronic equipment and a medium. The method comprises the steps of determining a three-dimensional grid space range, and performing data preprocessing through phase data; determining a calculation diameter and a phase control value range of the three-dimensional spherical model through a variation function; carrying out normal transformation on the phase-by-phase logging data and the seismic data, and then carrying out Bayesian-sequential Gaussian simulation; and performing normal inverse transformation on a simulation result in the grid to finish simulation calculation. Spatial sample points are expanded to the spatial three-dimensional sphere model, so that the value range of to-be-simulated points can dynamically change, and the correlation of sample point values is improved; on the basis of a variation function, under the condition of considering the source direction, data in the three-dimensional sphere model is screened, sedimentary facies are introduced into an algorithm for constraint, the accuracy of sampling point value taking can be guaranteed, geological cognition and sedimentary modes can be followed, and more accurate input data are provided for simulation prediction.

The invention relates to the field of image processing, and provides an image generation method, electronic equipment and a vehicle, and the method comprises the steps: obtaining a fisheye image corresponding to the current position of the vehicle, projecting each pixel point in the fisheye image to a preset spherical model, and determining a first projection point corresponding to each pixel point; projecting each first projection point to a preset cylinder model to obtain a second projection point corresponding to each first projection point; and obtaining target internal and external parameter data corresponding to the fisheye image, and performing texture mapping processing on all the second projection points according to the target internal and external parameter data to obtain a planetary visual angle top view corresponding to the current position of the vehicle. The fisheye image is sequentially projected twice through the spherical model and the cylinder model, alignment of ground textures is achieved due to the fact that the radius of the bottom face of the cylinder is large, points far away from the center can be compressed through vertex transformation of the spherical model, and therefore the problem that far ground points are seriously stretched is avoided, and the accuracy of ground texture alignment is improved. And the accuracy of the planetary view angle top view is improved.

This invention discloses a method and system for constructing a microscopic model of recycled concrete based on a three-dimensional five-phase spherical model, belonging to the field of numerical simulation technology for building materials. The method includes: constructing a co-simulation environment and creating a new mortar matrix; setting the core particle size of natural aggregate, the thickness of the old interface transition zone, the thickness of the old mortar, and the thickness of the new interface transition zone; generating single-particle aggregates and recursively calculating the outer diameter of each layer; generating random spatial coordinates that satisfy boundary constraints; placing aggregates based on a random sequential adsorption algorithm and Euclidean distance interference judgment criterion; parameterizing the effective aggregates to generate four concentric spherical geometries and marking them according to preset naming rules; repeating the placement until the target volume is reached; and automatically aggregating spherical geometries of the same medium type into an explicit selection set using naming rules. This invention solves the problems of single-dimensionality, missing microphases, and low modeling efficiency in existing technologies, achieving high-precision and automated construction of the five-phase structure of recycled concrete, providing an accurate numerical model for subsequent mechanical property and durability analysis.

The invention discloses a sphere under-ice free floating motion observation device which comprises a water pool, a bottom plate is arranged in the water pool, a first partition plate, a second partition plate and a third partition plate are sequentially arranged on the bottom plate, a left side supporting rod is arranged on the second partition plate, a step hole is formed in the left side supporting rod, and a second partition plate is arranged on the third partition plate. A movable left extension rod is arranged in the stepped hole, a first spring sleeves the left extension rod, the first spring is connected with a spring push frame, the spring push frame is fixedly connected with a magnet, and an electromagnet is fixedly connected to the second partition plate; and a right side supporting rod is arranged on the third partition plate, a right extension rod is arranged at one end of the right side supporting rod, and the sphere model is clamped through the clamping effect of the left extension rod and the right extension rod. According to the invention, the sphere is accurately fixed underwater, and stable fixation and initial-velocity-free release of spheres with different sizes are realized; accuracy of information such as acceleration and speed of the sphere after observation and calculation is ensured. And the rotation of the sphere can be analyzed during shooting data observation.

The invention discloses a stochastic simulation method and device based on three-dimensional dynamic spherical model data, electronic equipment and a medium. The method can comprise the steps of obtaining a first expression of a simulation result of target data through a local prior distribution function according to the Bayesian theorem; establishing a second expression according to the first expression; and solving the second expression through Gaussian simulation to obtain a final simulation result of the target data. By dynamically acquiring the data of the three-dimensional spherical model and calculating the expectation value and the variance value of the dynamic data, a more accurate simulation result can be obtained.

The invention discloses an improved laser radar aerosol particle size inversion method based on backscattering characteristics, and belongs to the technical field of atmospheric remote sensing detection. The method comprises the following steps: firstly, establishing a double-layer revolution ellipsoid model of which the aspect ratio represents morphological characteristics and the core-shell ratio represents coating structure characteristics for real dust-wrapped aerosol; then simulating the optical characteristics of the sand-dust-wrapped aerosol with the precision of 600 scattering directions by adopting a DDSCAT code, and simulating and calculating the optical characteristics of the core-shell spherical sand-dust-wrapped aerosol with a smaller calculation step length by utilizing a DDA method; then, carrying out extinction characteristic inversion based on the double-layer revolution ellipsoid and the core-shell sphere model to obtain an extinction equivalent particle size; and taking the extinction equivalent particle size as a constraint condition, and performing inversion to obtain a back scattering equivalent particle size. According to the method, the inversion precision of the backward scattering equivalent particle size of the dust aerosol wrapped under the laser radar framework is improved, and reliable data support is provided for dust aerosol radiation effect evaluation.

The invention discloses a ship ice resistance calculation-oriented broken ice channel modeling digital twinning method, which comprises the following steps of: obtaining broken ice contour information of a broken ice channel through a broken ice image segmentation and coordinate mapping method, and obtaining a circle center coordinate by using an RDP algorithm and a hexagonal grid algorithm; the method comprises the following steps: acquiring a three-dimensional DEM sphere model of a crushed ice channel by introducing a layer thickness mapping and sphere center coordinate generation technology, and acquiring a ship-ice-water multiphase coupling numerical simulation model simulated in software by adopting a CFD (Computational Fluid Dynamics) method through combining an integral computational domain of a ship three-dimensional model with a computational domain grid with an SST turbulence model and a contact model; by establishing a ship motion model and a transient pressure load database, the resistance and contact force distribution condition of the whole ship body can be obtained in real time when the ship sails in an ice region, so that the construction process of crushed ice channel modeling digital twinning for ship ice resistance calculation is realized; the problems that in an existing method, broken ice geometry simplification, ice loading condition idealization and stress distribution are difficult to obtain are solved.