Tsinghua University

Huawei Technologies Co., Limited

Huawei Device (dongguan) Co., Ltd.

Huawei Device Co., Ltd.

Zettawatt Energy (changzhou) Technology Co., Ltd

Wei Lv

Chen Zhang

Fei-Yu Kang

Bao-Hua Li

Ying Tao

Wei Wei

Xiaolong Wang

Quan-Hong Yang

Xiao-Yu Zheng

Weibin Lai

Haifeng Zhu

Cong-Hui You

Huaya He

Feiyu Kang

Baohua Li

Conghui You

Quanhong Yang

A method for making graphene-based highly dense but porous carbon material with a high degree of hardness includes forming a sol by dispersing a graphene-based component in a solvent; preparing a graphene-based gel by reacting the sol in a reacting container at a temperature of about 20&#xb0; C. to about 500&#xb0; C. for about 0.1 hours to about 100 hours; and drying the gel at a temperature of about 0&#xb0; C. to about 200&#xb0; C. to obtain a material. A graphene-based porous carbon material and applications thereof are also disclosed.

High-density and high-hardness graphene-based porous carbon material, method for making the same, and applications using the same

A method for manufacturing graphene-based material is disclosed. A graphene oxide dispersion includes graphene oxide dispersed in solvent. A hydrogen sulfide gas is introduced to the graphene oxide dispersion at a reacting temperature to achieve a graphene dispersion. The hydrogen sulfide reduces graphene oxide into graphene, and elemental sulfur produced from the hydrogen sulfide is deposited on surfaces of the graphene. The solvent and elemental sulfur are removed to achieve a graphene composite material.

Methods for manufacturing graphene based material

Methods of manufacturing graphene based material

The present invention discloses a method, a device, and a system for acquiring streaming media data. By performing a statistical analysis on historical information related to a streaming media service, which is recorded by at least one device of a terminal and a media content delivery device, bit rates suitable for downloading a streaming media file when different types of terminals access various types of networks are summarized, so that when performing a streaming media service, a terminal can directly request to acquire a streaming media file at a suitable bit rate without a need to attempt to download the streaming media file, starting from a lowest bit rate.

Method, device, and system for acquiring streaming media data

A SIM card connector includes a base, signal spring, a detection apparatus, and a controller. The detection apparatus is configured to cooperate with one side of a SIM card, and includes a fixed contact and a detection spring, where an action of the SIM card can be detected by separation or union between the fixed contact and the detection spring. The controller can disconnect a power supply of the signal spring before the SIM card is separated from the signal spring, and can switch on the power supply of the signal spring after the SIM card presses against the signal spring, which effectively prevents the SIM card from being burned out by a momentary electric arc generated between the SIM card and the signal spring when the SIM card is being inserted or removed.

SIM card connectorfor preventing SIM card burnout by detecting insertion and removal of the SIM card

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Shenzhen, China

Wei Lv