1. Zhidong, Z., Min, P., Yuquan, C.: Instantaneous frequency estimate for non-stationary signa. In: Fifth World Congress on Intelligent Control and Automation, vol. 4, pp. 3641–3643 (2004)
2. Ruqiang, Y., Gao, R.X.: Hilbert–Huang transform-based vibration signal analysis for machine health monitoring. IEEE Trans. Instrum. Meas. 55, 2320–2329 (2006)
3. Yuping, Z.: Hilbert-Huang transform and marginal spectrum for detection of bearing localized defects. In: The Sixth World Congress on Intelligent Control and Automation, vol. 2, pp. 5457–5461 (2006).
4. Sari, D.Y., Wu, T.-L.: Investigation on sound signal emitted bypunching process for punch failure monitoring. In: Conference Paper Mar (2017)
5. Sari, D.Y., Wu, T.-L., Lin, B.-T.: Preliminary study for online monitoring during the punching process. Int. J. Adv. Manuf. Technol. 88, 2275–2285 (2017)