Study on the variation of environmental kuznets curves and reason analysis of industrial waste gas discharge in Xi′an City;

Based on Granger Causal test and ADF test,a VAR model was developed and the impulse response function and variance decomposition method were employed for quantitative study of the relationships between the industrial output,industrial wastewater effluent,and technical efficiency of industrial water utilization.

Study on the evolvement of the relationship between industrial wastewater discharge and economic growth in Jiangsu Province;

According to the data of pollution control investment in recent ten years,the relationship between water pollution control investment per GDP and industrial wastewater discharge is studied in this paper.

Based on the theory of Environmental Kuznets Curve,established an EKC model of industrial wastewater discharge in south of Jiangsu Province to analyze the relationship between environmental pollution and economic growth.

The influence to mechanical properties of carbon fiber made by preoxidation retention time、temperature of low-oven and exhaust emission;

The characteristics of spark timing and A/F ratio effect on HC、CO and NO x emissions are analyzed through test data, these characteristics may be used to correctly select or control the spark timing and A/F ratio for decreasing the exhaust emission of a gasoline engine.

The static exhaust emission performance of automotive gasoline engines is influenced by a few factors such as engine s crankshaft rotate speed, load, air/fuel ration and spark timing, etc, the relationship between those factors and the engine exhaust emission performance is nonlinear.