Abstract: A relay is disclosed to enhance a retention force by using a yoke iron and an opening group on a top cover. The relay includes the yoke iron, the top cover, a static iron core, a primary permanent magnet group, a secondary permanent magnet group, a first movable iron core, and a second movable iron core. The top cover is provided with a first opening group, the first opening group is provided at a position at which the top cover is configured to be in contact with the first movable iron core, the first opening group includes at least one first sub-opening, the yoke iron is provided with a second opening group, the second opening group is provided at a position at which the yoke iron is configured to be in contact with the second movable iron core, and the second opening group includes at least one second sub-opening.

Abstract: A method for software update management is described. The method comprises: comparing sub-files of a plurality of variants of a software program to generate difference information including a list of uncommon sub-files among the plurality of variants; generating one or more increment files based on the difference information and files of a target version of the software program; and transmitting the one or more increment files to a device, wherein the transmission enables the device to merge the one or more increment files with files of one of the plurality of variants to generate files of the target version of the software program.

Abstract: Disclosed is a method and an apparatus for incremental upgrade. When a server generates an incremental file, it acquires sub-files of different types in an old version compressed file and a new version compressed file, and performs different difference comparison steps on the sub-files of different types, to obtain difference data files for corresponding types: for sub-files that satisfy a preset decompression condition, a decompression comparison method is used to perform difference comparison, and for sub-files that do not satisfy the preset decompression condition, a direct comparison method is used to perform difference comparison; subsequently, a client acquires the difference data files from the server, and according to the type of a difference data file, carries out a merge operation on the difference data file and the old version compressed file to obtain the new version compressed file.

Abstract: The present invention provides an incremental upgrade method and system for a file. The method comprises: reading ZIP data information of an APK file, the ZIP data information being a ZIP data header and/or a ZIP directory table; acquiring an APK eigenvalue of the APK file according to the read ZIP data information; and performing incremental upgrade on an APK base file corresponding to the APK eigenvalue according to the APK eigenvalue. By means of the present invention, the efficiency of incremental upgrade can be improved while the calculation amount for acquiring an APK eigenvalue is reduced.

Abstract: Disclosed is a method and an apparatus for incremental upgrade. When a server generates an incremental file, it acquires sub-files of different types in an old version compressed file and a new version compressed file, and performs different difference comparison steps on the sub-files of different types, to obtain difference data files for corresponding types: for sub-files that satisfy a preset decompression condition, a decompression comparison method is used to perform difference comparison, and for sub-files that do not satisfy the preset decompression condition, a direct comparison method is used to perform difference comparison; subsequently, a client acquires the difference data files from the server, and according to the type of a difference data file, carries out a merge operation on the difference data file and the old version compressed file to obtain the new version compressed file.

Abstract: The present invention provides an incremental upgrade method and system for a file. The method comprises: reading ZIP data information of an APK file, the ZIP data information being a ZIP data header and/or a ZIP directory table; acquiring an APK eigenvalue of the APK file according to the read ZIP data information; and performing incremental upgrade on an APK base file corresponding to the APK eigenvalue according to the APK eigenvalue. By means of the present invention, the efficiency of incremental upgrade can be improved while the calculation amount for acquiring an APK eigenvalue is reduced.

Abstract: A method for software update management is described. The method comprises: comparing sub-files of a plurality of variants of a software program to generate difference information including a list of uncommon sub-files among the plurality of variants; generating one or more increment files based on the difference information and files of a target version of the software program; and transmitting the one or more increment files to a device, wherein the transmission enables the device to merge the one or more increment files with files of one of the plurality of variants to generate files of the target version of the software program.