Abstract: A three-dimensional scanning ranging device, including: an optical scanning chip (1), a focusing lens (2), a light receiving element (3) and a microprocessor, wherein the optical scanning chip (1) may be used for sequentially scanning and outputting line-shaped light spots of a plurality of scanning angles onto a to-be-measured object, the focusing lens (2) may be used for sequentially focusing a plurality of light beams reflected from the to-be-measured object under irradiation of the line-shaped light spots, the light receiving element (3) may be used for sequentially receiving the plurality of light beams after being focused by the focusing lens (2) so as to obtain multiple images containing a bright spot, the microprocessor may be used for analyzing, on the basis of a first relationship between the bright spot and a depth of the to-be-measured object at different scanning angles and in different pixel rows, the multiple images containing a bright spot so as to obtain a three-dimensional point cloud of the

Abstract: A system differential upgrade method and apparatus, and a mobile terminal are provided. The method includes: obtaining an upgrade script and upgrade data; upgrading a file to be upgraded according to the upgrade script and the upgrade data; generating, according to the file processing command that is being executed currently in the upgrade script, and the file to be upgraded corresponding to the file processing command that is being executed currently, rollback data and a rollback script corresponding to the file to be upgraded; and when the upgrade fails, executing the rollback script according to the rollback data. The apparatus includes an obtaining module, an upgrading module, a generating module, and an executing module. According to the embodiments of the present invention, when an upgrade fails, the rollback script is executed according to the rollback data, which may restore a system to that before the upgrade.

Abstract: A system differential upgrade method and apparatus, and a mobile terminal are provided. The method includes: obtaining an upgrade script and upgrade data; upgrading a file to be upgraded according to the upgrade script and the upgrade data; generating, according to the file processing command that is being executed currently in the upgrade script, and the file to be upgraded corresponding to the file processing command that is being executed currently, rollback data and a rollback script corresponding to the file to be upgraded; and when the upgrade fails, executing the rollback script according to the rollback data. The apparatus includes an obtaining module, an upgrading module, a generating module, and an executing module. According to the embodiments of the present invention, when an upgrade fails, the rollback script is executed according to the rollback data, which may restore a system to that before the upgrade.