City University of Hong Kong

Comba Network Systems Company Limited

Yangyang Li

Jian Lu

Binbin Zhou

Junda Shen

Weidong Zhong

Zebiao Li

Yawen Zhan

Shangkun Wu

Feixiang Ma

Li Fan

An ROF communication remote machine and an ROF system are disclosed. The machine comprises a first packaging module and a second packaging module. The first packaging module comprises a first branch and a second branch. The first branch is used for converting a downlink optical signal, and sending the downlink electrical signal to the second packaging module. The second branch receives the downlink electrical signal, converts the downlink electrical signal into a downlink optical signal, sends the downlink optical signal to the local machine, receives an uplink electrical signal, and sends the uplink electrical signal to the local machine. The second packaging module is used for amplifying the power of the downlink electrical signal, filtering the downlink electrical signal, then feeding back the downlink electrical signal to another component, receiving the uplink electrical signal, and sending the uplink electrical signal to the second port.

ROF communication remote machine and ROF system

The present invention provides a method of fabricating a catalytic reaction material. A solution of a carbon precursor compound and a noble metal precursor compound is prepared; the carbon precursor compound includes a salt component. The solution is recrystallized the solution to form recrystallized complexes including both the carbon precursor compound and the noble metal precursor compound. The recrystallized complexes are calcined to create a salt template for generation of two-dimensional carbon nanosheets embedding isolated noble metal atoms. Further calcining and washing decomposes the salt template to produce two two-dimensional carbon nanosheets embedding isolated noble metal atoms, each nanosheet having a thickness of approximately 1 to approximately 10 nanometers.

Method of fabricating a material for use in catalytic reactions

A Raman detection system has a Raman spectrometer and a fixing light shielding stand. One end of the fixing light shielding stand is fixedly connected to the Raman spectrometer, and the other end is disposed with an entrance groove for a needle-like SERS probe to enter. A slot for fixing the needle-like SERS probe is formed at an end of the entrance groove, and the slot and the needle-like SERS probe match in shape and size. The Raman detection system has a fixing light shielding device with a dark color groove and a focal length. The groove can be used for limiting the rolling of the curved surface structure of the needle-like SERS probe. A laser can be focused on the curved surface more accurately by adjusting the distance from the instrument detector to the SERS probe.

Raman detection system, detection method and application thereof

A method for treating a surface of a metallic structure, the metallic structure being made of a first metallic material; the method including the steps of: (a) bonding an alloy material made of the first metallic material and a second metallic material with the structure; and (b) etching away at least some of the first metallic material from a structure obtained after step (a) so as to obtain a treated structure with an increased specific surface area compared with the metallic structure before treatment.

Method for treating a surface of a metallic structure

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Guangdong, China

Yangyang Li