6results about How to "Improve traversal efficiency" patented technology

The invention discloses a table look-up type deformation matching and electromagnetic mapping digital twinning system and a table look-up type deformation matching and electromagnetic mapping digital twinning method. The system pre-constructs a multi-physical field simulation database with speed as a main key, stores a deformation three-dimensional model, pressure field data, radar cross section (RCS) data and feature point displacement, and establishes a reduced scale model deformation-speed association list. In the manual mode, the speed is directly input to call corresponding multi-physical field data; in an automatic mode, the displacement of the feature points of the reduced scale entity model is detected in real time through a displacement detection module, the current deformation quantity is calculated, a speed major key is reversely matched by adopting a minimum absolute difference method based on the association list, and then corresponding multi-physical field data is called; and synchronously displaying the deformation three-dimensional model, the pressure field pseudo-color distribution and the RCS map on a visual rendering platform, and realizing digital mapping from entity deformation to a multi-physical field state.

This invention discloses a nanobody Nb.TB1, engineered plant exosomes, their preparation methods, and applications, belonging to the field of biomedical technology. The amino acid sequence of the nanobody Nb.TB1 is shown in Seq ID No. 1. Furthermore, this invention proposes a method for preparing engineered plant exosomes, comprising the following steps: S1, extraction of Gastrodia elata exosomes: extracting Gastrodia elata exosomes from Gastrodia elata using an enzymatic method; S2, expression and purification of the blood-brain barrier-crossing nanobody fusion protein with Sortase A ligase; S3, surface modification of the Gastrodia elata exosomes. In addition, this invention also proposes an engineered plant exosome prepared by the above method. Furthermore, this invention proposes the application of the above-mentioned engineered plant exosomes in the preparation of targeted therapeutic drugs for central nervous system diseases. The engineered plant exosomes prepared by this invention exhibit high blood-brain barrier crossing efficiency.

This invention discloses a collision detection method and system based on hybrid bounding boxes and lung anatomical features. The method includes: constructing bounding boxes for the lung, lung lobes, and lung segments based on a three-dimensional finite element model of the lung; determining intersecting lung segment bounding boxes using a breadth-first traversal algorithm; determining intersecting lung lobule bounding boxes using a depth-first traversal algorithm; and accurately detecting the collision position of a surgical instrument proxy ball using fine intersection detection to obtain the collision detection result. The depth-first traversal order is calculated based on the predicted positions of the lung segment bounding boxes and the surgical instrument proxy ball. This invention avoids the problems of computational redundancy and poor real-time performance in collision detection.

This invention relates to the fields of cheminformatics and high-value utilization of solid waste, and particularly to a method for optimizing process parameters in the preparation of geopolymers from copper tailings and fly ash based on cheminformatics. The method involves constructing a heterogeneous reaction map of the geopolymer precursor and generating a silicon-aluminum-oxygen network topological chemical fingerprint vector. A dynamic graph convolution thermodynamic constraint collaborative prediction model is established, embedding physicochemical hard constraints to output the mapping relationship between process parameters and target performance. A chemical fingerprint similarity-weighted Pareto front adaptive exploration algorithm is used for global optimization, combined with in-situ vibrational spectroscopy to achieve online updating of the heterogeneous reaction map and iterative calibration of the model. This invention can effectively shorten the optimization cycle, comprehensively improve the target performance, and produce geopolymers with excellent mechanical properties and heavy metal solidification effects, providing efficient and precise technical support for the large-scale high-value utilization of copper tailings and fly ash.

The application discloses a bottom-layer acceleration structure reconstruction method and device, a graphics processor, equipment and a medium. The method comprises the following steps: screening a reconstructable bottom-layer acceleration structure based on structure feature information; determining a reconstruction cost of the reconstructable bottom-layer acceleration structure; performing reconstruction scoring according to the reconstruction cost and the structure feature information, and determining a structure reconstruction score; determining a target bottom-layer acceleration structure according to the structure reconstruction score and a preset score threshold; and splitting and reconstructing the target bottom-layer acceleration structure to obtain a plurality of sub bottom-layer acceleration structures. The technical scheme provided by the application splits and reconstructs the target bottom-layer acceleration structure to generate a plurality of sub bottom-layer acceleration structures with more compact spatial distribution, significantly reduces the spatial overlap degree between different instance bounding boxes, reduces the number of redundant node access and intersection test times during the traversal of the top-layer acceleration structure in the ray tracing process, improves the traversal efficiency of the ray tracing, and reduces the waste of computing power resources.

The application is suitable for the technical field of electromagnetic simulation calculation, and provides a multi-radiation-source space electromagnetic field solving method and a terminal based on space structure reconstruction. The method comprises the following steps: analyzing a grid model of a three-dimensional electromagnetic propagation scene and converting the grid model into a triangular facet element set used for electromagnetic ray tracing; generating a one-dimensional triangular facet element sequence of the triangular facet element set according to the Morton coding of the center vector of each triangular facet element; clustering the triangular facet elements according to the geometric connection relationship between the triangular facet elements and reconstructing the order of the triangular facet elements in each cluster; constructing a BVH scene tree according to the reconstructed triangular facet element sequence, determining the triangular facet elements intersecting with the electromagnetic rays in the grid model according to the BVH scene tree, eliminating the triangular facet elements not intersecting with the electromagnetic rays, and determining the propagation path of the electromagnetic rays in the grid model and the electromagnetic field distribution. The application is more in line with the electromagnetic propagation direction characteristics, optimizes the traversal path, improves the traversal efficiency, and shortens the calculation time.