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Articles by Liqun Shan
Total Records ( 3 ) for Liqun Shan
  Liqun Shan , Jinkuan Wang , Yanchao Zhao and Yanchang Liu
  This study has addressed the problem of data aggregation scheduling problem to minimize the latency in wireless sensor networks (WSNs). An efficient distributed synchronous aggregation scheduling method is proposed to structure a collision-free schedule for data aggregation in WSNs. By using a Connected Dominating Set (CDS) as an aggregation tree we implement the synchronous aggregation scheduling. We prove that the latency of the aggregation schedule generated by our algorithm is at most 4δ+15R-16 time-slots where R is the network radius and δ is the maximum node degree in the communication graph of the original network. Analysis and simulation results show the validity and superiority of the algorithm.
  Liqun Shan , Jinkuan Wang and Wei Wei
  In Wireless Sensor Networks (WSNs), each sensor obtains data and have to communicate these data to a central node. Because sensors are battery powered they are highly energy constrained. Data aggregation can be used to combine data of several sensors into a single message, thus reducing the data traffic and the power consumption. This study has considered the problem of maximizing the time at which the first node with data aggregation in WSNs drains out of energy. It investigated optimal data aggregation routing for achieving the goal above. The problem is formulated as a linear programming problem. By solving the network lifetime optimization problem, the optimal solutions and the distributed implementation can be obtained that are based on the primal-dual decomposition. Simulation results indicate that the algorithm is superior to the existing methods.
  LiQun Shan , Wei Wei and Yanchang Liu
  Design of web user interface (WEB UI) plays a very important role in the humanization,Personality and intelligence of the developments of web application. Customization of the user interface is one of the extremely important researches of computer software technology. Relating to mutual operation in design of web user interface generally, software developers are required with coding base and professional knowledge. Traditional design pattern neglect property of reuse and customization sometimes and lengthen development cycle. It is necessary to grogram lots of codes generally because most existing UI development tools are designed aiming at professional developer. Therefore,it is meaningful to do the researches of the user interface customization. Based on the technical analysis, a whole framework platform is builded based on the MVC design pattern and a simple and full-visual WEB UI development is designed and developed. The platform describes user interface with meta model technology, implement coding reuse and UI customization based on template technology. In the practice of web UI design, applying WEB UI customization tool based on the achievement related with above work and the technology, some WEB application systems are realized efficiently and achieve a universal good evaluation coming from users and developers. At the end of this study summarizes the realization and research of WEB UI customize personalized custom-made method.
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