Time-frequency analysis (TFA) for mechanical vibrations in non-stationary operations is the
main subject of this article, concisely written to be an introducing tutorial comparing different …

Motivated by analyzing complicated time series, nonlinear-type time–frequency analysis has
become an active research topic in the past decades. Those developed tools have been …

The synchrosqueezing transform, a kind of reassignment method, aims to sharpen the time-
frequency representation and to separate the components of a multicomponent non …

In the literature of fault diagnosis for machinery, mechanical vibration signal analysis serves
one of the most important approaches. By extracting features of vibration signal, such as …

The continuous wavelet transform (CWT)-based synchrosqueezing transform (SST) is a
special type of the reassignment method which not only enhances the energy concentration …

In nature and engineering world, the acquired signals are usually affected by multiple
complicated factors and appear as multicomponent nonstationary modes. In such and many …

In this article, we propose an adaptive time-reassigned synchrosqueezing transform
(ATSST) to characterize the signals with strongly time-varying feature. A time-varying …

Civil engineering structures usually exhibit time-varying characteristics under operational
conditions due to changes in environment and loads. The identification of instantaneous …

Recently, a direct method of the time–frequency approach, called the signal separation
operator (SSO), which is based on sinusoidal signal approximation, was introduced to …

The objective of this paper is to introduce an innovative approach for the recovery of non-
stationary signal components with possibly crossover instantaneous frequency (IF) curves …