M. F. Ghazali

TL;DR: It was demonstrated from the review that most of the research yield favourable results of engine modelling prediction for both of the methods, and a high degree of determination coefficient indicating that the model could predict the model efficiency with reasonable accuracy.

TL;DR: In this paper, a comparative study of instantaneous frequency analysis techniques based on pressure transients recorded within a live distribution network is presented, where the instantaneous frequency of the signals are analysed using the Hilbert transform (HT), the Normalised Hilbert transform(NHT), Direct Quadrature (DQ), Teager Energy Operator (TEO), and Cepstrum.

TL;DR: In this article, a discussion about gas leak detection in pipeline system using acoustic method is presented in this paper, the wave propagation in the pipeline is a key parameter in acoustic method when the leak occurs and the pressure balance of the pipe will generated by the friction between wall in the pipe.

TL;DR: In this paper, the authors used the Hilbert transform (HT) and the Hilbert Huang transform (HHT) to detect pipeline leaks and features based on analysis of a pressure transient.

TL;DR: In this paper, the acquired signal was analyzed using Hilbert Huang transform (HHT), which uses empirical mode decomposition for the purpose of filtering unrelated-to-damage signal components, and Hilbert spectral analysis to obtain the energy-frequency distance plot.