油液磨粒超声回波信号双树复小波自适应降噪最优分解层数的研究
유액마립초성회파신호쌍수복소파자괄응강조최우분해층수적연구
Research of Optimal Decomposition Level in Adaptive De-noising Ultrasonic Echo Signal of Wear Debris in Oil Based on Dual-tree Complex Wavelet Transform
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