The curve reveals the dynamic evolving trace of environmental economy situation of Xi′an′s industrial development in the recent 15 years,and reasons of variation are analyzed,by means of factor analysis and correlation analysis of grey-system.

The factor analysis method including mathematical model, eigenvalue method of factor abstraction, rotational transformation and factor explanation, and its application to integral analysis of observational data of large dam have been presented in this paper.

This paper establishes an economic model and analyzes intensivism of the economic growth mode by means of factor analysis method.

Research on methods of managing various factors affecting construction activities and time limit responsibility with factor analysis method;

For this,this paper firstly establishes analysis indexes of economic activity under electric power market and the factor analysis method,then,designs analysis model based on indexes.

On the basis of Water Conservancy Ⅰ-0 Table,factor analysis method was applied to construct the model of the inter regional difference of the utilization of water resource.

This paper expounds four methods for enterprise s financial analysis, the comparison analytic method, the tendency analytic method, the proportion analytic method, and the factor analytic method.

A review on the toxicological study of chemicals using gene-analytic techniques in China was introduced in the paper,main chemicals concerned are lead,cadmium,nickel,chromium,manganese,benzene,benzo(a)pyrene,vinyl chloride,trichlorethylene,alcohol,octyl phenol,ethyl nitrosocarbamide,MNNG etc.