The Research On Comprehensive Evaluation Of Environmental Quality Of Chinese

With the development of science and technology, China’s economy has entered a stage of rapid development, people feel the rapid economic development has brought convenience and colorful, but at the same time, the development of economy has also increased the pollution of environment, such as air pollution, water pollution, noise pollution, solid waste pollution and radioactive pollution and so on. In recent years,most of our cities in the fog and haze pollution is also caused by the environment.Eighteen big report put forward to build a "Beautiful China" for the first time,although the concept of "Beautiful China" contains many aspects, but clearly one of the most environmentally friendly basic conditions.In order to better deal with the environmental quality of human relations,environmental quality with economic development, the need to analyze the current situation of environmental pollution, and make the evaluation of environmental quality, put forward the countermeasures of environmental pollution, reduce thus brought social development economic activity and affect people’s lives, in order to achieve harmonization of environmental and economic virtuous circle, harmonious development. Based on these considerations, we make a choice of comprehensive evaluation of environmental quality as a dissertation topic. First chapter describes the background, purpose and significance of current research are reviewed and presented research ideas and methods in this paper. The second chapter describes the evaluation of the environmental quality of the theory and methods, including the concept and value of the environmental quality, the basic principles and characteristics of PSR model, AFSA description and processes, and BP neural network model. The third chapter builts environment quality evaluation system, constructed according to the principles of the index system, from the pressure, state representative indicators selected in response to the three aspects, the use of standard deviation and coefficient of variation condition generalized minimum variance method of indicators for screening. Chapter IV describes the current situation of China’s environmental quality and describes the feasibility of AFSA and BP neural network model combining BP neural network model to build AFSA is based, then the environmental quality of China’s 31 provinces and autonomous regions of the comprehensive evaluation.Finally, the full text summary of suggestions on environmental quality in China.According to the empirical results, the environmental quality provinces suffered different degrees of difference, the top three provinces of the better quality of the environment is Tibet, Hainan and Yunnan, where geographical conditions in these areas due to restrictions by industrial led development have not launched a large area,relatively good quality of the environment. Second, Guangxi, Fujian, Chongqing,Beijing, Guizhou, Jiangxi, Hunan, Guangdong, Sichuan region, in addition to the capital Beijing, the others were or province south of the Yangtze River basin,Guangxi, Chongqing, Guizhou, Hunan, Sichuan Province, these pressures facing environmental quality is not great, state of the environment is relatively good. There are relatively backward northwest, northeast, and several provinces in eastern China,although there is no lack of rapid economic development among cities and provinces,but these areas of population, economy and pollution pressure is relatively large, the environmental quality has not been improved and enhanced. Ranking behind Henan,Xinjiang, Gansu, these regions themselves on the natural environment there is a big disadvantage, together with the local development of backward, science and technology investment and financial investment in the face of environmental problems are relatively backward, environmental quality is lagging behind. Improve the quality of the environment is not something can be done, this paper from the government’s responsibility, the transformation of economic growth, vigorously develop the circular economy, and take effective measures to prevent and control industrial pollution, improve environmental quality concrete measures proposed to promote the optimization and improvement of civic awareness of environmental protection.