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Guangzhou, China

Xiang W.,Wuhan University | Li X.,Guangdong Waterway Bureau | Chao B.,Wuhan University | Guo J.,Wuhan University | Guo Z.,Yichang Surwers Technology Co.
Journal of Geomatics

We introduced the key technology of 3-Dimension city modelling based on World Wind, and ArcGIS Engine and multi-source data. Then, we put forward the modeling method with the Client/Server mode of software architecture in the public safety emergency system. The 3D city modeling system is customized and extended and some spatial analysis functions are realized on the 3-Dimension virtual globe. Source

Yang M.-Y.,Guangdong Waterway Bureau | Huang X.-G.,Guangdong Waterway Bureau | Zhang B.,Digiark Information Corporation | Xie M.,Digiark Information Corporation
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology

To reduce the dependence of remote telemetry buoy network structure on the public network, a special scalable wireless sensor network is designed. Combined with GSM network, GPRS network and Internet, the network platform of remote monitoring and control system is constructed. The hierarchical scheduling algorithm is used to improve sleep HEED sensor network topology, and a clustering-based sensor network routing protocol is proposed for pharos remote controling to address the common "hot zone" problem in multi-hop routing sensor networks. Practice has proved that the routing protocol optimizes network energy consumption, it is a better solution to the "hot zone" problem, and it can significantly extend the survival time of the network. Source

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