The South China University of Technology

Guangzhou Special Pressure Equipment Inspection and Research Institute

Yue Li

Quan Xue

Bo Yang

Wenquan Che

Shaowei Liao

Maodong Li

Zhenling Wu

Shiping Li

Zhigang Wang

Wei Zhai

Guojia Huang

Shuanghong Zhang

Fang Wen

Huachao Guo

Yingyi He

Disclosed is a wired cooperative multiple input multiple output (CMIMO) signal transmission method based on a multimode transmission line. The method includes the following step: selecting a type of the multimode transmission line; constructing a wired CMIMO transmission system based on the multimode transmission line; performing channel measurement to obtain a transmission coefficient matrix; judging whether the transmission coefficient matrix satisfies a full rank and reversibility and has a condition number satisfying conditions; optimizing a structure of the multimode transmission line, a multiport excitation structure, and a multiport receiving structure to obtain the transmission coefficient matrix which satisfies a full rank and reversibility and has a condition number satisfying conditions; making the transmission coefficient matrix be equivalent to a channel matrix of the wired CMIMO transmission system; and completing signal excitation, transmission and reception of the wired CMIMO transmission system based on the multimode transmission line.

Wired cooperative multiple input multiple output (CMIMO) signal transmission method based on the multimode transmission line

Provided is a method for preparing graphene by liquid-phase ball milling exfoliation, including following steps: mixing a transition metal halide salt, a nitrogen source substance and an organic solvent to prepare an intercalation agent; mixing the intercalation agent with graphite, carrying out ball milling, and then performing centrifugation to obtain a graphite intercalation compound; washing and filtering the graphite intercalation compound obtained, adding an expansion agent, and carrying out ultrasonic agitation to obtain a graphene dispersion; and washing, filtering and drying the graphene dispersion to obtain graphene powder.

Method for preparing graphene by liquid-phase ball milling exfoliation

Growing community of inventors

Guangzhou, China

Yue Li