用黎卡堤变换研究如下二阶非线性脉冲微分方程（ 方程式略）得到了两个判断方程振动的充分条件。
Oscillation of a kind of second order nonlinear differential impulsive equation(The equation is abbreviated), is studied and some sufficient conditions are obtained.
分析了减振固定式直线电动压缩机机体上的激振力，推导了机体的振动微分方程式，重点讨论了理想情况下机体振动微分方程式的具体表达式并对其进行了数值求解。
The paper analyzes the exciting force on the fixed tube linear motor drive compressor(TLMDC), and provides the concrete body vibration differential equations on TLMDC and its calculating results.
在汽水换热条件下，对流作诱导振动强化传热规律进行了试验研究，得到了管外对流换热的准则方程式。
Experiments were carried out on the heat transfer characteristics of the elastic tube bundles used in steam-water heat exchanger. The…
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