With the aid of discrete Du's Transformation, we can solve the zero-state response of a discrete-time system usually described by a linear difference equation.
利用离散杜氏变换，给出线性离散系统零状态响应计算式，并可用以解线性差分方程；
In this paper, the difference equation model of traffic assignment of urban traffic system is established according to the present urban traffic fact.
本文从分析目前城市交通实际状况出发建立了路网交通流分配的差分方程模型。
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