55 results about "Spatial aggregation" patented technology

For most large 3D engineering models, the instance positions of repeating instances of connected components show significant multiple spatial aggregation. The invention uses several KD-trees, each for one cluster of points which are spatially aggregated. The multiple KD-trees generate a relatively short data stream, and thus improve the total compression ratio. A method for encoding points of a 3D mesh model comprises steps of determining that the mesh model comprises repeating instances of a connected component, and determining for each repeating instance at least one reference point, clustering the reference points of the repeating instances into one or more clusters, and encoding the clustered reference points using KD-tree coding, wherein for each cluster a separate KD-tree is generated.

The invention discloses a symmetric type two-level plane reflection gathering method applied to a space solar power station, and relates to symmetric type two-level plane reflection gathering methods. The method aims to solve the problems that in a current solar energy gathering system scheme, gathering energy flow distribution is uneven, a light spot pattern does not match the shape of a solar cell, and tracking difficulty is high. A reflecting system is established through the following steps that first level off-axis parabolic reflecting planes are arranged on the two sides of a solar cell panel respectively, the two first level off-axis parabolic reflecting planes are symmetrically arranged around an optical axis perpendicular to the solar cell panel, two second level tapered plane mirrors are symmetrically arranged on the two sides of the focus of the two first level off-axis parabolic reflecting planes respectively, two elliptic light spots generated on the surface of the solar cell panel overlap completely, the optimum structure parameter of the reflecting system is calculated, tracking error regulation is carried out on the reflecting system, the reflecting system under in-orbit operation is regulated in two dimensions, and a solar cell array can achieve energy flow gathering. The method is used for energy flow gathering of the space solar power station.

The invention relates to a soft tissue deformation method based on spatial kernel mapping and subspace aggregation. In the process of soft tissue deformation, deformation will occur between the surgical needle and the triangular mesh of the soft tissue model and between the triangular mesh, and the deformation is detected by the collision detection method combining the intersection of the triangular mesh and the AABB; through the kernel method Embed the data into a specific space in a nonlinear manner, and use a linear operation method to solve the nonlinear function in the space to obtain a data set; include all units that meet the classification criteria into the set to generate candidate subspaces ;Calculate the aggregation force of the subspace, and select the best subspace by the aggregation force; use the two-dimensional comparison method to separate the pure subspace; judge whether the remaining space is an empty set, until the searched full space data becomes an empty set. The invention can improve the accuracy of the model grid displacement and improve the deformation effect of the soft tissue at the next moment.