Zhang Liying

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This paper presents the topologies and characteristics in current Peer-to-Peer networks (P2P), points out some advantages and disadvantages of P2P approaches, analyzes the threats that the P2Ps face. This analysis will help people understand the potential benefits and disadvantages of P2P in the research community and industry, and improve it further.
This paper introduces a radioactive source tracer anti-theft system, which mainly consists of three parts-Detection probe, Tracker and PC. It is based on RFID, GSM and GPS. The system can realize non-contact information acquisition processing for the stolen radioactive source. If there is unauthorized or illegal movement of radioactive sources, GPS/GSM(More)
In this paper, we present a new method of communication image retrieved using integer wavelet transform based on lifting scheme and the algorithms can be implemented on hardware easily. Because high frequency components obtained by wavelet decomposition are large around impulse noise, lifting wavelet filters are designed by changing their free parameters(More)
Our country requests that medical polluted water should be discharged only after treatment, the detection in the effects of the polluted water disinfection and whether the second pollution will be produced is judged by detecting the content of the residential chlorine in the wasted water after treatment. The complicated components in the polluted water give(More)
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