Abstract: The present invention relates to the technical field of biodegradable materials, and specifically relates to a degradable filament, a special material for the filament, and a preparation method therefor and a use thereof. The filament comprises a main base material of PHA, or a pure PHA base material and auxiliary agents such as a nucleating agent and/or a reinforcing agent. According to the present invention, by further cooperating with an initial spinning process comprising cooling and stretching, the preparation of a pure PHA-based filament is achieved; the phenomena such as low melt strength, poor thermal stability, low crystallization speed, weak mechanical properties, and serious adhesion during PHA spinning are improved; the comprehensive properties, in particular the mechanical properties, of the pure PHA-based filament are improved; and the requirements of the application fields of conventional fabric products and industrial textile products are met.

Abstract: The present invention provides a modification method of polyhydroxyalkanoate (PHA), which comprises the following steps: dispersing nanoparticles into a liquid phase environment, adding the PHA, and blending at a high speed to modify, and simultaneously, combining with the extraction process of the PHA, namely continuously and integrally performing extraction and modification, and achieving high-purity extraction and reinforcing and toughening modification of the PHA by a one-step method. The PHA material obtained by the method can be directly applied to multiple fields without subsequent modification processing.

Abstract: The present invention relates to the technical field of polymer material manufacturing, and in particular to a biodegradable material and preparation method thereof. The biodegradable material is prepared by using a resin comprising only PHA, and further incorporating suitable fillers and/or auxiliary agents. The biodegradable material of the present invention exhibits excellent performance in that it can swiftly and thoroughly degrade in natural environments, ensuring complete environmental friendliness throughout its life cycle. As a result, it facilitates the reduction of white environmental pollution caused by disposable plastic products and the lowering of petroleum consumption.

Abstract: The present disclosure provides a checking method of a system start-up file. The method includes: acquiring the system start-up file and a mapping table from a system firmware partition; reading first check data and addressing data associated therewith from the mapping table; reading segmentation data corresponding to the first check data from the system start-up file according to the addressing data; determining whether the first check data is a first type or a second type; if it is the first type, determining whether the segmentation data is a repeated permutation of the first check data, and if not, a security error exists in the system start-up file; and if it is the second type, determining whether second check data, obtained by calculating the segmentation data according to a check algorithm, is consistent with the first check data, and if inconsistent, a security error exists in the system start-up file.

Abstract: The present disclosure provides a checking method of a system start-up file. The method includes: acquiring the system start-up file and a mapping table from a system firmware partition; reading first check data and addressing data associated therewith from the mapping table; reading segmentation data corresponding to the first check data from the system start-up file according to the addressing data; determining whether the first check data is a first type or a second type; if it is the first type, determining whether the segmentation data is a repeated permutation of the first check data, and if not, a security error exists in the system start-up file; and if it is the second type, determining whether second check data, obtained by calculating the segmentation data according to a check algorithm, is consistent with the first check data, and if inconsistent, a security error exists in the system start-up file.

Abstract: A software upgrade method and system for a mobile terminal includes locating partition tables of a new version of software and an old version of software, generating a corresponding backup list, scanning all files of the new version of software, generating a differential upgrade package that comprises a partition table of the new version of software and the backup list, saving backup data, to be backed up in the mobile terminal, into a SD card according to the backup list, re-partitioning a mobile terminal memory according to the partition table of the new version of software in the differential upgrade package, correspondingly writing the backup data on the SD card into the partition, decompressing the differential upgrade package to obtain a corresponding differentiating file, generating corresponding new version files according to the differentiating file and the old version files in the mobile terminal, and writing into the mobile terminal.

Abstract: A method of generating a Firmware Over-The-Air (FOTA) upgrade package is disclosed, comprising: determining whether a file having a same filename or being similar as a file in a software package of a new version exists in a software package of an old version; when there exists a file having a same filename or a similar file, generating a difference file between the file in the software package of the old version and the file in the software package of the new version and adding the difference file into the FOTA upgrade package, and when there doesn't exist a file having a same filename or a similar file, adding the file in the software package of the new version into the FOTA upgrade package. An FOTA upgrading method, a server, and a mobile terminal are also disclosed.

Abstract: A method of generating a Firmware Over-The-Air (FOTA) upgrade package is disclosed, comprising: determining whether a file having a same filename or being similar as a file in a software package of a new version exists in a software package of an old version; when there exists a file having a same filename or a similar file, generating a difference file between the file in the software package of the old version and the file in the software package of the new version and adding the difference file into the FOTA upgrade package, and when there doesn't exist a file having a same filename or a similar file, adding the file in the software package of the new version into the FOTA upgrade package. An FOTA upgrading method, a server, and a mobile terminal are also disclosed.

Abstract: A software upgrade method and system for a mobile terminal includes locating partition tables of a new version of software and an old version of software, generating a corresponding backup list, scanning all files of the new version of software, generating a differential upgrade package that comprises a partition table of the new version of software and the backup list, saving backup data, to be backed up in the mobile terminal, into a SD card according to the backup list, re-partitioning a mobile terminal memory according to the partition table of the new version of software in the differential upgrade package, correspondingly writing the backup data on the SD card into the partition, decompressing the differential upgrade package to obtain a corresponding differentiating file, generating corresponding new version files according to the differentiating file and the old version files in the mobile terminal, and writing into the mobile terminal.