Abstract: A foldable electric bed frame that is relatively thinner in a folded state and easy to pack and transport includes a bed frame body, subframes, driving motors, bed boards, and detachable bed legs. The driving motors and the bed boards are connected to the bed frame body and the subframes. Flexible covering members are further comprised. The flexible covering members are arranged along the edges of the periphery of the bottom of the bed boards and are connected to the bottom of the bed boards through velcro or other detachable connecting members; and when the bed frame body is in a folded state, the flexible covering members are located between the stacked bed boards. The flexible covering members are arranged around the bed boards, and when the bed frame is folded, the flexible covering members are used as a buffering measure.

Abstract: Approximate nearest neighbor (ANN) searching is a fundamental problem in computer science with numerous applications in area such as machine learning and data mining. For typical graph-based ANN methods, the searching method is executed iteratively, and the execution dependency prohibits graphics processor unit (GPU)/GPU-type processor adaptations. Presented herein are embodiments of a novel framework that decouples the searching on graph methodology into stages, in order to parallel the performance-crucial distance computation. Furthermore, in one or more embodiments, to obtain better parallelism on GPU-type components, also disclosed are novel ANN-specific optimization methods that eliminate dynamic memory allocations and trade computations for less memory consumption. Embodiments were empirically compared against other methods, and the results confirm the effectiveness.

Abstract: A zone correction-based method for improving positioning accuracy in a satellite-based augmentation system, including: dividing an area to be observed into a plurality of observation areas, and configuring a plurality of monitoring stations in each observation area; acquiring residual of each monitoring station by processing observation data; acquiring mean clock error value of each monitoring station according to observation residual; acquiring ambiguity reduction value of each observation area according to residual data; acquiring zone corrections of each observation area according to residual data and ambiguity reduction value data; and providing a user with a zone corrections calling service by means of a network or a satellite link. The method carries out wide-range area configuration to monitoring stations and calculates the zone corrections for use in network and satellite-based broadcasts on the basis of the monitoring stations to refine error correction in user positioning.