This paper, using characteristic function expansion method, have soluted a vibration response problem of a uniform bar-spring which was subjected to a series of rectangular pulses excitation.
本文运用本征函数展开方法，求解均质杆——弹簧系统受序列矩形脉冲激励的振动响应问题。
2
Home spring, is so beautiful, poetic, so beautiful mood, so that the Permanent Mission of the springbar around us!
家乡的春天，是这样的美丽，富有诗意，这样优美的意境，让春天常驻我们身边吧！
3
The reason is called Ivy, perhaps because it is green all year round spring-like, full of energy bar.