The paper chose the total investment in fixed assets of the whole society as the economic indicator and chose the discharge of industrial waste water,the emission of industrial waste gas,the discharge of industrial solid as the economic indicators.

The present macroscopic economic indicator is calculated according to the SNA system of United Nations.

Using the principal component analysis of modern statistical analysis,considering the major relation of economic indicators,the paper does some empirical research on 14 cities in Hunan Province,which is significant for the functional division of logistics network nodes and can make the system more scientific and reasonable in the province.

The Correlation among Main Agronomic Characters and Their Effects on Economic indexes of Flue-cured Tobacco by the Grey Incidence Analysis;

Comparative research into main economic indexes between Sichuan and Chongqing;

Gray correlation analysis on the main agronomic characters and economic indexes of the flue-cured tobacco