The implicit expression of displacement of string vibration was established by the time integration method.
由时间积分法建立了弦振动位移的隐式表达式。
The calculation method of drilling string axial vibration is given. Meanwhile, the different methods of analysing drilling string axial vibration state are supplied in different surveying condition.
并给出计算任意组合钻柱系统的轴向振动稳态响应的一般方法，提供不同测量条件下分析钻柱轴向振动状态的不同方法。
Transverse vibration control of an axially moving string system by Lyapunov method;
综述轴向运动弦线纵向振动及其控制问题的研究进展。
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