Title	A Two Level TDMA Scheduling Protocol with Intra-cluster Coverage for Large Scale Wireless Sensor Network
Author	Haigang Gong, Ming Liu
Citation	Vol. 6  No. 2  pp. 77~84
Keywords	wireless sensor networks, media access control, TDMA, energy efficiency, Intra-cluster coverage

Title	A PSO-based Model for Assessment of Atmospheric Quality
Author	Limin Wang, Yanchun Liang, Ming Li, Xiaohu Shi, Xuming Han
Citation	Vol. 6  No. 3  pp. 76-79
Keywords	Particle swarm optimization, universal formula, pollution harm rate, assessment model.

Title	Performance Improvement of the Cognitive Radio Networks with User Cooperation
Author	Zhi Gang Duan, Ming Li Zhang, Xiang Xu
Citation	Vol. 8  No. 9  pp. 121-126
Keywords	Cognitive Radio, Cooperation, Interference Temperature, Power Allocation, Rate Maximization