Dongsheng Liu

Learn More
The de®nition and maintenance of work¯ow processes have become important tasks for enterprises as work¯ow management systems (WFMS) are systematically applied to critical business processes. In order to simplify the management and usage of work¯ow processes and to integrate with other applications, a good modeling method is essential. The WFCP-net(More)
Macroscopically realizable applications of DNA-based molecular devices require individual molecules to cooperate with each other. However, molecular crowding usually introduces disorder to the system, thus jeopardizing the molecular cooperation and slowing down their functional performance dramatically. A challenge remaining in this field is to obtain both(More)
—Association rules mining is an important content in data mining. It can discover the relations of different attributes by analyzing and disposing data which is in database. This paper proposes a novel data mining algorithm to enhance the capability of exploring valuable information from databases with continuous values. The algorithm combines with(More)
Recent urban development in Shanghai, the largest city in China, and its impact on the water environment are examined in this study. The area of built-up surface was obtained from the classification of the Landsat 7 ETM+ images of the year 2000 for Shanghai. The proportion of built-up surface and population density were extracted from buffer zones with(More)
A RF powering circuit used in radio-frequency identification (RFID) tags and other batteryless embedded devices is presented in this paper. The RF powering circuit harvests energy from electromagnetic waves and converts the RF energy to a stable voltage source. Analysis of a NMOS gate-cross connected bridge rectifier is conducted to demonstrate relationship(More)