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- [3] Projection pursuit cluster model and its application in water quality assessment[J]. WANG Shun-jiu 1,*, YANG Zhi-feng 1,2, DING Jing3 (1. School of Environment, Beijing Normal University, Beijing 100875, China. 2. The State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China;3. School of Hydropower Engineering, Sichuan University, Chengdu 610065, China).Journal of Environmental Sciences. 2004(06)