Huawei Technologies Co., Limited

Shenzhen Geneinno Technology Company Ltd

Chao Lu

Lei Liu

Li Zeng

Zhaohui Li

Leijun He

Linghao Cheng

Baoqing Liu

Yanfu Yang

Zengqiang Chen

The present disclosure relates to file access methods. In one example method, a first electronic device receives a trigger operation performed by a user on a sandbox file in a shared interface sent by a second electronic device, and sends an access request to the second electronic device. The second electronic device receives the access request, and determines mapping information corresponding to the sandbox file based on the access request, where the mapping information includes a mapping file corresponding to the sandbox file, a path of the mapping file, and a correspondence between the path of the mapping file and file index information of the sandbox file. The second electronic device sends the mapping information to the first electronic device. The first electronic device receives the mapping information, and may directly access the sandbox file based on the mapping information.

File access method, communication system, and electronic device

In the data compression method, a raw data block in raw data is processed based on a compression algorithm to obtain a standard compressed data block that has a length of L2 and that corresponds to the raw data block, and the raw data is further compressed into one or more standard compressed data blocks that each have the length of L2 and that are to be decompressed in parallel by a decompression apparatus, where the decompression apparatus includes a plurality of decompression engines, and each decompression engine is capable of decompressing one standard compressed data block within one processing cycle. According to the data compression method, a standard compressed data block with a fixed length can be obtained through compression.

Data compression method, data decompression method, and related apparatus, electronic device, and system

Underwater robot

A method for implementing Polarization Division Multiplexing Binary Phase Shift Keying (PDM-BPSK) modulation and Quadrature Phase Shift Keying (QPSK) modulation in a compatible manner includes: dividing a direct current (DC) light into a first channel of light and a second channel of light with the same power; separately performing optoelectrical modulation on the first channel of light and the second channel of light and correspondingly outputting a first optical signal and a second optical signal in a Binary Phase Shift Keying (BPSK) format; performing polarization state control on the first optical signal; performing a phase shift on the first optical signal or the second optical signal; and performing optical signal combination with the polarization state preserved on the first optical signal and the second optical signal after the polarization state control and the phase shift, and outputting a PDM-BPSK modulation optical signal or a QPSK modulation optical signal.

Method and apparatus for implementing PDM-BPSK modulation and QPSK modulation in compatible manner

Growing community of inventors

Shenzhen, China

Chao Lu