32results about How to "Facilitates parallel computing" patented technology

The invention relates to a three-dimensional vibration analysis method for a composite laminated structure, and the method is applied to the fields of engineering mechanics and vibration engineering. The method comprises: extracting geometric, material and boundary condition parameters of the structure, and setting J non-uniformly distributed calculation planes in a thickness direction for each layer of the structure; configuring displacements of the structure on the calculation planes; performing in-plane component expansion on the displacement of the structure on each calculation plane, applying a boundary condition through a boundary feature function, and obtaining the displacement of the structure on the calculation plane; calculating in-plane directional strain of the structure on the jth calculation plane in an lth layer; calculating strain and stress of the structure in any position of the lth layer; establishing an energy equation of the structure; and calculating a feature equation of the structure. According to the method, the structure is decomposed into a plurality of calculation planes through spatial lamination plane setting; on one hand, the dimensionality of the structure is reduced, so that the calculation speed is increased and the calculation cost is reduced; and on the other hand, the structure is divided into parts, so that parallel calculation is facilitated and the calculation efficiency is improved.

The invention discloses an improved SM4 parallel encryption and decryption communication method based on a GPU (Graphics Processing Unit). The encryption and decryption method comprises the following steps: using an AES (Advanced Encryption Standard)-128 key expansion algorithm to generate an expanded subkey needed by an SM4 encryption algorithm; improving a round function in the SM4 encryption algorithm; and using the parallel computing power of the GPU, improving the SM4 encryption algorithm into a form of parallel encryption. By adopting the encryption and decryption communication method of the invention, the security and the speed of implementation can be effectively improved, real-time and parallel encryption can be performed on data, and the encryption speed can be improved, so that normal transmission of data flow can be guaranteed and the processing delay can be reduced.

The present application relates to a method, device, computer equipment and storage medium for numerical simulation of gravity field based on complex terrain. The method includes: constructing a three-dimensional cuboid model containing complex terrain and exploration targets, performing grid division to obtain a plurality of small cuboids, and setting the spatial domain density value of the small cuboids; Gaussian parameters are set to obtain the offset wavenumber. According to the terrain information, the three-dimensional cuboid model is divided into the lower part model and the upper part model, and the frequency domain gravity anomaly field of multiple observation surfaces is superimposed to calculate the two-dimensional Gaussian Fourier transform. The inverse transformation is used to obtain the gravity anomaly field in the space domain of multiple observation surfaces, and the gravity anomaly field in the space domain of the complex terrain undulation surface is obtained through the spline interpolation algorithm. The invention retains the vertical direction in the space domain, has flexible grid division, and is suitable for simulating complex terrain and complex geological bodies. Multiple offset wave numbers are convenient for parallel calculation, and the calculation efficiency of gravity anomaly is improved.

The invention relates to a lane sideline aggregation method based on track direction, comprising: taking the track line segment between two adjacent track points as the center, generating a track line segment buffer according to a set width; combining the buffer areas of each track line segment Generate a buffer list, judge whether to keep or discard the track point according to whether the track point is in the buffer list, and generate a reference track according to each reserved track point; extend the track point in the reference track to both sides to generate a scan line segment, for the same scan line segment The intersection points with the original lane edge are clustered to generate each cluster point, and each cluster point is classified and fitted into a line to obtain the aggregation result of the lane edge. Extracting the trajectories of characteristic directions from a large number of trajectories can avoid a large number of original trajectories from participating in the calculation and improve the calculation efficiency; the intersection of the trajectory scan line and the lane edge is introduced as a new clustering element, so that the final generated lane shape is especially miscellaneous and The lane shape of the curve is in line with the actual situation.

The invention discloses a geosynchronous orbit SAR squint imaging processing device for on-satellite walking removal and 2D spatial-variant correction. According to the device, sequentially, on a satellite, a receiving window is adjusted to remove signal walking through the satellite, a walking-removal echo link is downloaded, a spatial-variant model is constructed according to a satellite-groundgeometric relation, and a range direction residual walking correction, range migration correction and compression, azimuth direction partial dechirp for reducing a time span, azimuth direction residual walking removal, azimuth direction nonlinear conversion and compression and final geometric correction and imaging result outputting are conducted. Compared with the prior art, the feature of quitelow repetition frequency under GEO SAR is used, and while range direction and azimuth direction coupling is reduced through on-satellite walking removal, the effectiveness of data storage on the satellite is improved; for received echoes, partial fined correction is conducted in the azimuth direction and range direction, so that the focusing precision of an algorithm is improved.

The invention discloses a data parallel encryption communication method and system based on a Modbus protocol. The communication system comprises: a data collection site and a central monitoring system; the data collection site comprises a site configuration module, a data collection module, a modified SM4 parallel encryption module and a data transmission module; the central monitoring system comprises a data receiving module, a modified SM4 parallel description module and a data display monitoring module. In application of the communication system of the invention, the transmission security of industrial data is improved; the encryption speed of the real industrial data is improved; therefore the encryption processing delay is reduced; and the system has an offline reconnection mechanism, therefore, the device is monitored discontinuously.

The invention provides a power distribution network state estimation method based on network decomposition. The method comprises the following steps that a power distribution network is decomposed; sub-network state variable initialization is carried out; loop iteration solving is carried out; constraint condition equivalent measuration weight is computed; a sub-network state variable is solved; whether a convergence condition is met is judged, if yes, iteration is completed, and power distribution network state estimation results are output; and otherwise, 1 is added to iteration times automatically, and loop iteration solving is carried out. The applicability of a state estimation algorithm is improved, a large network can be subjected to state estimation, by network decomposition, the data scale of a node admittance matrix is lowered, the storage space requirements and computing complexity are lowered, for the large network, compared with direct computing, computing speed is high, and efficiency is high.

The invention discloses an equipment health management system and a database modeling method thereof, and belongs to the technical field of management systems. The equipment health management system comprises a CBM equipment health management subsystem, an equipment health information visualization system and an expert system, and further comprises a space-grid-based database including a space grid node data packet composed of space grids and grid nodes, wherein relative space coordinates of nodes and activation time of the nodes are stored in the space grid node data packet. The system and the method provided by the invention have the advantages that firstly, an equipment management space is subjected to space grid division, so that grid data can be stored in a distributed manner, grid parallel computing is facilitated, and data processing efficiency is improved; secondly, the traditional journal recording mode based on a time line is converted into a space-based journal recording mode, so that journal recording modes are enriched; thirdly, three-dimensional visualization processing is performed on equipment health state information corresponding to the space grids.