基于改进的灰色关联分析TOPSIS法的区域生态安全评价

In order to fully understand the ecological security of Hubei province in ten years, PSR model was used to build an indicators system for ecological security evaluation. combination of weighting method and the weighted TOPSIS of the improved gray correlation analysis was used to conduct a dynamic safety evaluation of ecology of Hubei Province from 2005 to 2014. The results show that the ecological security index from 2005 to 2006 tend to the same, there were a slow trend of growth from 2007 to 2012, and there was a slow decline from 2013 to 2014. Overall, there both close to the critical level of safety. Among them, the ecological pressure index, it shows that Hubei ecosystem stress is relatively large; the index of ecological security state decreased gradually, indicating that environmental damage was more and more serious; its ecological response is basically below the critical security state, it shows that relevant measures were taken in order to maintain ecological safety in Hubei Province. Overall, the ecological environment is relatively poor in Hubei province.