Abstract: This application provides a method for performing inter-app data synchronization in a service management platform. The method includes: creating a state machine for a platform virtual room containing a target object in the service management platform; creating a service virtual room in an application through the state machine, and adding the target object into the service virtual room; receiving service progress data of the target object in the service virtual room through the state machine and updating the state machine accordingly to obtain a state-updated state machine; and performing data synchronization processing on the platform virtual room according to the state-updated state machine and the service progress data of the service virtual room so as to synchronize object service information of the target object in the service virtual room into the platform virtual room.

Abstract: Disclosed in this application are a method for embedding a watermark in video data and apparatus, a method for extracting a watermark in video data and apparatus, a device, and a storage medium. The method for embedding the watermark includes: acquiring a target image frame in video data; performing time-frequency transformation on the target image frame to obtain target frequency domain data, the target frequency domain data comprising a matrix formed by frequency domain coefficients; changing the frequency domain coefficients in the target frequency domain data according to watermark data to obtain watermarked frequency domain data; performing inverse time-frequency transformation on the watermarked frequency domain data to obtain a watermarked image frame; and synthesizing watermarked video data according to the watermarked image frame.

Abstract: Wood flooring, comprising a body and a groove track, wherein the groove track is disposed at the back of the body, the groove track comprises a plurality of linear grooves, and the linear grooves are oriented with respect to one another at an angle.