Through establishing longitudinal alliance among functional logistics enterprises which are engaged in different logistic services under two kinds of market conditions, the essay analyzes quantitatively the influence of longitudinal alliance on each member enterprises in terms of the influence on business volume, profit and market price.

With 145 companies listed in Shanghai and Shenzhen securities exchange,the paper analyses the factors for corporation vertical strategic alliance establishment.

By using the data from 407 companies in 22 industries, this article analyses corporation vertical strategic alliance motivation.

On the performance of a horizontal alliance of manufacturers in supply chain;

This paper constructs a theoretical model to analyze the conduct, performance and regulation of horizontal alliance, which is built up in the form of cost saving bilateral agreement between Cournot duopolistic firms in single market.

Based on the traditional alliance,we construct a loose vertical integrated strategic alliance which lies between market and enterprise,and also is different from the fully integrated organization forms.

This paper analyses the line fault characteristics in weak power source system, and puts forward schemes suitably to adopt pilot directional (distance) relay or optical current differential protection, especially the latter using twain side volt.