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 …

The paper investigates asymmetries effects over a nonlinear vibration energy harvester
dynamics. The asymmetric system performance is compared with symmetric ones. Different …

Background Several applications in engineering, a mechanical system operates in the
nonstationary regime, creating the possibility to generate nonlinearities in them. Time …

At present, the majority of the research on dynamic model of rolling bearings with multiple
faults is conducted on the assumption that the displacement deviation between raceway and …

Non-ideal energy sources are present in several engineering applications where the power
source interacts with the dynamics of the structure to which it is coupled. The systems driven …

In this work, the investigation of energy harvesting for a U-frame-type (portal frame) structure
is presented. The structure is considered as a composite made out of a Shape Memory Alloy …

The long term behavior of chaotic flows is investigated by means of time dependent
frequency analysis. The system under test consists of an electrically conducting fluid …

In this study, the research on the nonlinear dynamics of semiconductor quantum dot laser
with two time-delayed optical feedbacks is numerically investigated. Results show that the …

Traditional signal detection algorithms are often robust and are typically sufficient for high
SNR data. However, the assumptions behind these methods begin to fall apart when signal …

Fourier Transform (FT) offers a spectral analysis by specifically indicating the frequencies
that have signals in addition to their corresponding amplitudes and phases. However, FT …