Three-dimensional ocean current Lagrange coherent structure analysis algorithm
A technology of structural analysis and ocean currents, applied in computing, image data processing, 3D modeling, etc., can solve problems such as limitations
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[0009] 1. Initialize the grid network and generate the Cauchy Green strain tensor of each grid point, and find the eigenvector corresponding to the maximum eigenvalue of the tensor matrix: initialize the three-dimensional grid points with equal intervals in the research space, in order to improve the calculation Accuracy, initialize six auxiliary points in the six directions of up and down, left and right, and front and back of each grid point. Note that the distance from the auxiliary point to the main grid point should be much smaller than the distance between the main grid points. Let the auxiliary points move in the flow field for a period of time, and perform space-time interpolation on the surrounding flow field to obtain the movement of the auxiliary points, and then obtain the deformation gradient matrix around the main grid points. The gradient matrix is multiplied by its transpose matrix to obtain the Kochgreen strain tensor matrix corresponding to the grid points....
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