In this paper the equivalence of two criteria for chaos threshold in an impact vibration system is verified.
以一类简单的碰撞振动系统为例，验证了两种混沌门槛值判据的等价性。
2
In order to on-line process engine cylinder head vibration signals of mobile equipment, a de-noising method with gradual changing threshold based on lifting wavelet package transform was proposed.
为了实现移动装备发动机缸盖振动信号的在线处理，提出一种基于提升小波包变换的渐变式阈值降噪方法。
3
The emphasis of this project is to present threshold value of blasting vibration strength to ensure structure and apparatus of nuclear power station safe.