在雷达、声纳、通信以及振动工程等领域中经常根据离散观测值（采样序列）对正弦信号的参数进行估计。采用复信号模型给信号分析和处理带来很大方便,因此文献中通常采用复正弦信号模型。-In radar, sonar, communications and vibration engineering and other fields are often based on discrete observations (sample sequence) of the sinusoidal signal para

Under the dynamic load loose abrasive wear for the study, the use of sample rotation in the abrasives, abrasive body vertical vibration excitation by wear in the form, starting from the vibration frequency, vibration of loose abrasive in the wear con

A novel fault feature extraction method based on the local mean decomposition technology and multi-scale entropy is proposed in this paper. When fault occurs in roller bearings, the vibration signals picked up would exactly display non-stationary