3results about How to "Guaranteed frequency" patented technology

A method and system for collecting pedestrian motion data based on hybrid rendering renders a pre-set traffic scene from a virtual engine onto a virtual reality headset. Subjects then perform a series of human-vehicle interaction behaviors and reactions based on the images displayed on the headset. Motion capture devices record these behaviors and reactions while simultaneously driving a virtual character within the rendering engine, completing a series of data acquisition processes within the rendering engine. This invention fully combines the convenience of scene creation, data acquisition, coordinate system calibration, and time synchronization of a rendering engine simulator with the richness and realism of human movement and reactions in the real world. It captures and redirects the reactions and movements of real pedestrians based on the virtual scene in the rendering engine to a virtual character within the rendering engine, and then collects and records multi-view, multi-modal data within the rendering engine.

The utility model discloses an old man turning-over device relates to medical auxiliary instrument technical field, including frame body part, control part and lifting part, replace manual heavy physical operation: device relies on the drive motor of control part, screw rod and abutment plate cooperation, through motor drive screw rod rotation, drive abutment plate to lift to promote first side plate, second side plate rotation around pivot, realize the mechanical lifting of old man body position and turn over, replace traditional manual auxiliary turning-over's heavy physical labor. Without nursing staff consuming physical strength to move or lift the old man, solve the problem of nursing staff fatigue caused by frequent turning over at night, reduce the work burden of long-term nursing, adapt to the scene of family lack of professional nursing staff.

This invention belongs to the field of photovoltaic power generation control technology and discloses a method for partitioning distributed photovoltaic clusters in a regional distribution network. It calculates the electrical distance between nodes based on a frequency-active power sensitivity matrix and obtains the electrical distance matrix. An optimized initial centroid is obtained using the PSO algorithm. Based on the initial centroid, the K-means algorithm is applied to perform cluster analysis on the nodes of the distribution network, completing the cluster partitioning of energy storage nodes. Using energy storage nodes as centroids, the remaining photovoltaic nodes without energy storage and load nodes are further partitioned into clusters. A comprehensive performance index is obtained by weighting three indicators: active power balance, energy storage balance, and modularity. The partitioning scheme with the highest comprehensive performance index is considered the optimal cluster partitioning. This invention uses the energy storage area as the center to partition distribution areas containing distributed photovoltaics into clusters, providing necessary inertia and frequency support for the power grid.