4 results about "Temporal discretization" patented technology

The invention relates to the technical field of tidal current energy utilization, and discloses an oscillating hydrofoil motion response and fluid-structure interaction deformation solving method, which comprises the steps of defining a hydrofoil motion mode and structure and fluid key parameters, and defining core characteristics of pitching given motion, free heaving motion and bending-torsion coupling deformation; establishing a heaving motion kinetic equation based on the Newton's second law, and constructing a bending-torsion coupling deformation control equation in combination with the structural mechanics principle; building a three-dimensional numerical simulation model containing block grids and boundary layer encryption design, and meeting calculation requirements through spanwise and time discretization processing; solving a fluid distribution load and a total lift force based on a Navier-Stokes equation; and a four-order Runge-Kutta method is adopted to solve the heaving motion response, and a Newmark-beta time integral method and a finite difference method are adopted to solve the bending-torsion coupling deformation. In this way, the strong coupling characteristics of hydrofoil movement and fluid-solid coupling deformation can be accurately captured, and technical support is provided for design optimization and performance improvement of the oscillating hydrofoil type tidal current energy device.

This application relates to a spatiotemporal discretization control circuit and control method. The spatiotemporal discretization control method includes a spatial discretization mode, comprising: acquiring a spatial configuration value, which represents the workload required for the control circuit of the power consumption unit array to output; acquiring a spatial grouping value; which is used to divide the workload into 2... N The application involves grouping the workload into sub-workloads; obtaining the channel address value; dividing the channel address value into two parts based on the spatial grouping value; dividing the spatial configuration value into two parts based on the spatial grouping value; and comparing the second part of the bit-reversed channel address value with the first part of the spatial configuration value. This application also relates to a spatiotemporal discretization control method, including a time discretization mode. This application further relates to a spatiotemporal discretization control circuit, including a spatial discretization module. This application also relates to a spatiotemporal discretization control circuit, including a time discretization module.

The application discloses a kind of multi-stage space-time modeling road target detection methods based on event data.The present application constructs a kind of target detection network of fusion spatial feature modeling, space modulation context broadcast (SM-CB) module, deep separable convolution gated unit (DSConvGRU) module, pulse timing memory (STM) module and feature fusion and detection module for the problems of strong event camera data sparsity, time sequence dependence is significant and the lack of space-time information modeling of existing method.The method is first time discretization and space accumulation to event stream data, generates structured event representation;Subsequently in multi-stage feature extraction process, realize spatial feature modeling by local and global self-attention mechanism;On this basis, introduce SM-CB module to aggregate and space modulation global semantic information, enhance feature expression ability;While combining DSConvGRU module and STM module, the dynamic change of event data is modeled;Finally, through multi-scale feature fusion and detection head, the detection and positioning of target are realized.The present application can effectively improve the precision and robustness of pedestrian and vehicle target detection in complex road scene.

The application relates to the technical field of tidal current energy utilization, and discloses a solution method for oscillating hydrofoil motion response and fluid-structure coupling deformation, which comprises the following steps: defining hydrofoil motion modes and key parameters of structures and fluids, and clearly defining the core features of given pitching motion, free heaving motion and bending-torsion coupling deformation; establishing a heaving motion dynamics equation based on Newton's second law, and constructing a bending-torsion coupling deformation control equation in combination with the principle of structural mechanics; building a three-dimensional numerical simulation model containing a block grid and a boundary layer encryption design, and meeting the calculation requirements through spanwise and time discretization processing; solving fluid distribution load and total lift based on the Navier-Stokes equation; solving the heaving motion response by using the fourth-order Runge-Kutta method, and solving the bending-torsion coupling deformation by using the Newmark- β time integration method and the finite difference method. In this way, the strong coupling characteristics of hydrofoil motion and fluid-structure coupling deformation can be accurately captured, thereby providing technical support for the design optimization and performance improvement of an oscillating hydrofoil type tidal current energy device.