在研究改进节点法避免零主元问题时,云昌钦等人引入广义元件、广义网络概念。在[1]中,由i—v平面上一条曲线所定义的元件被称为普通电阻元件或1-约束元件;而由i—v平面上一点所定义的元件称为2—约束元件;由整个i—v平面所定义的元件则被称为0—约束元件。包括普通元件和广义元件(2—约束元件和0—约束元件)的网络 In the study of improving the node method to avoid zero principal component problem, Yun Changqin et al. Introduced the concept of generalized elements and generalized network. In [1], an element defined by a curve on the i-v plane is called a normal resistance element or a 1-restraint element; and an element defined by a point on the i-v plane is called a 2-restraint element. From Elements defined by the entire i-v plane are called 0-constrained elements. A network of normal and generalized elements (2-constraint and 0-constraint)