本文以清楚的物理概念，依据经典力学原理建立了两相介质完整的动力学非线性方程组。

Based on clear physical concepts, complete nonlinear dynamic equations of two-phase media are derived by using classic mechanical principle directly.

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运用变质量系统的基本原理，建立轴流脱粒过程中谷物运动的非线性动力学模型。

Based on the principle of a varied mass system, the non linear mathematical model of the crop mechanics for an axial threshing process was set up.

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为了研究动力学系统和混沌中产生的跳跃随机性，利用能量平衡原理分析了二阶非线性电路的退化方程。

Chaos related discontinuity jumps in nonlinear dynamic systems were analyzed using a second order nonlinear circuit model and degenerative equations based on the energy balance principle.

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