Abstract: A method for controlling dynamic change of a screen refresh rate and an electronic device are provided. In a scenario of dynamic change of the refresh rate, a refresh rate switching instruction may be sent immediately through an added refresh rate setting interface (displaySetFps) within a current ith frame period before a current Vsync periodicity ends. After receiving the refresh rate switching instruction, a DDIC drives a display screen to switch a screen refresh rate, and then the DDIC returns a new TE signal. After receiving the new TE signal, SurfaceFlinger starts a new Vsync periodicity corresponding to a switched screen refresh rate. In an embodiment of this application, a switching speed at which the screen refresh rate is switched may be increased by adding a new path. For example, it may be ensured that each switching of the screen refresh rate is completed within one frame.

Abstract: A method for controlling dynamic change of a screen refresh rate and an electronic device are provided. In a scenario of dynamic change of the refresh rate, a refresh rate switching instruction may be sent immediately through an added refresh rate setting interface (displaySetFps) within a current ith frame period before a current Vsync periodicity ends. After receiving the refresh rate switching instruction, a DDIC drives a display screen to switch a screen refresh rate, and then the DDIC returns a new TE signal. After receiving the new TE signal, SurfaceFlinger starts a new Vsync periodicity corresponding to a switched screen refresh rate. In an embodiment of this application, a switching speed at which the screen refresh rate is switched may be increased by adding a new path. For example, it may be ensured that each switching of the screen refresh rate is completed within one frame.

Abstract: A traffic data stream aggregate query method and system includes the steps of acquiring spatial-temporal information of a mobile object to generate a traffic data stream, dividing data space into cells, grouping adjacent cells with similar frequency into few buckets, calculating Kalman gains of the buckets based on frequencies of the buckets, and indexing the buckets using a binary partition tree to form a BPT index of the current timestamp, and serializing the BPT after the end of the current timestamp to form a historical index; and performing aggregate query, wherein an optimum estimation value of the bucket frequency is utilized to replace for calculating when the frequency of the bucket changes a lot. The system includes: an information collection module, a data processing module, an index processing module, an application service module and an index storage module.

Abstract: A traffic data stream aggregate query method and system includes the steps of acquiring spatial-temporal information of a mobile object to generate a traffic data stream, dividing data space into cells, grouping adjacent cells with similar frequency into few buckets, calculating Kalman gains of the buckets based on frequencies of the buckets, and indexing the buckets using a binary partition tree to form a BPT index of the current timestamp, and serializing the BPT after the end of the current timestamp to form a historical index; and performing aggregate query, wherein an optimum estimation value of the bucket frequency is utilized to replace for calculating when the frequency of the bucket changes a lot. The system includes: an information collection module, a data processing module, an index processing module, an application service module and an index storage module.

Abstract: The present invention relates to a thermal pressure welding apparatus for the waist of incontinent pants and training pants and a thermal pressure welding method. The apparatus can thermal pressure weld the waist of incontinent pants and training pants consists of multiple layers of non-woven fabric in a fast, accurate and secure manner. An upper synchronous transmission mechanism and a lower synchronous transmission mechanism are disposed vertically opposed, by means of a shaft, on a side of a vertical frame. The upper synchronous transmission surface of the upper synchronous transmission mechanism and the synchronous transmission surface of the lower synchronous transmission mechanism are opposed. A plurality of toothed pressing blocks are spacedly opposed on the upper synchronous transmission surface and the lower synchronous transmission surface respectively.

Abstract: The present invention relates to a thermal pressure welding apparatus for the waist of incontinent pants and training pants and a thermal pressure welding method. The apparatus can thermal pressure weld the waist of incontinent pants and training pants consists of multiple layers of non-woven fabric in a fast, accurate and secure manner. An upper synchronous transmission mechanism and a lower synchronous transmission mechanism are disposed vertically opposed, by means of a shaft, on a side of a vertical frame. The upper synchronous transmission surface of the upper synchronous transmission mechanism and the synchronous transmission surface of the lower synchronous transmission mechanism are opposed. A plurality of toothed pressing blocks are spacedly opposed on the upper synchronous transmission surface and the lower synchronous transmission surface respectively.