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sensors Article Sensing Properties of Fused Silica Single-Mode Optical Fibers Based on PPP-BOTDA in High-Temperature Fields Jiahui Shen 1, Ting Li 1, Hong Zhu 1,2,* , Caiqian Yang 1 and Kai Zhang 3 1 Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of ...
Thus, in this article, a novel fault diagnosis method of diesel engine valve clearance using the improved variational mode decomposition (VMD) and bispectrum algorithm is proposed. First, the experimental study was designed to obtain fault vibration signals. The improved VMD method by choosing the ...