Assessment on Structural Integrity of In-service Machine Using De-noised Vibrational Modal Data and Artificial Neural NetworkZhi Chao Ong, Ee Teng Yap, Zubaidah Ismail and Shin Yee KhooMATEC Web Conf., 237 (2018) 03002DOI: https://doi.org/10.1051/matecconf/201823703002