Based on the mechanics model and differential equation of the system, the key affecting factors were analyzed and appropriate measures were put forward to make the injection stable at low velocity.

通过建立力学模型和系统的运动微分方程，分析主要影响因素，提出相应措施，达到注射机注射过程低速稳定的目的。

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An effective method for solving a partial differential equation of secondary hydrocarbon migration is put forward.

本文给出了一种高效率求解油气二次运移偏微分方程的方法。

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A beam element of 2 nodes and 10 degrees of freedom with interlayer damping alloy is presented and the element differential equation of motion is put forward.

针对阻尼合金夹层梁提出了一种2节点10自由度梁单元模型，给出了该单元运动微分方程。

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