In the second part, we mainly consider oscillations of solution of some linear and nonlinear partial difference equations with discrete variables and delays.

第二章主要是研究某些类型的线性或非线性的带有离散时滞的偏差分方程解的振动性的判别法。

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This paper is concerned with oscillation of solutions of a class of nonlinear partial difference equations. Some sufficient conditions of oscillation for the equations have been obtained.

本文讨论了一类半线性偏差分方程解的振动性，得到了这类方程解的振动性的一些充分条件。

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First, the partial differential equations are transformed into discrete space, discrete time nonlinear difference equations through characteristic method and finite difference approach.

首先，通过特征线法和有限差分法得到了时间离散和空间离散的非线性状态方程。

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