In this paper a conception of supply subchain is introduced and based on the analyses of the characteristic of the supply subchain , one simple model is support.

提出供应链子链概念,对子链特点和组成分析,阐述以子链单位考察和评要性,并提出一种简单评模型。

We also give the plots of mutual entropy as function of temperature, number of spins of subchain and the nearest neighbor interaction.

同时我们也给出量子互熵随温度，最近邻相互作用变化规律。