The elasticity of substitution is a useful concept in several areas of economics. 置换弹性在若干经济学领域内是一个有用的概念。
Based on the substitution theorem, this paper proposes a newpractical fault diagnosis method ior analog circuits. 基于网络分析中的置换定理，本文提出一种适用于容差情况下，非线性电路的实用性自动故障诊断新方法。
