2Xu F L, Zhao S S, Dawson R W, et al. 2006. A triangle model for evaluating the sustainability status and trends of economic development[ J]. Ecological Modelling, 195 : 327-337.
4The Central People's Government of the People's Republic of China (CPGPRC). 2006. The 11 th Five-year Plan for National Economic and Social Development of the People's Republic of China [ OL]. 2009- 11- 12, http://www, gov. cn/ztzl/2006- 03/16/content _ 228841_2. htm ( in Chinese).