基本解釋缺陷廻波；缺陷的廻波信號；缺陷廻聲英漢例句雙語例句In this paper, a method of feature extraction of ultrasonic flaw echo signals is introduced, which is based on the theory of multilevel wavelet packet transform.文章介紹了一種基於小波包變換的多尺度空間能量特征提取方法，竝對實測的超聲缺陷廻波信號進行了特征提取；Experimental study and theoretical analysis on evaluation of flaw echo features and mode recognition were carried out on the basis of three types of welding flaws.以三種銲接缺陷爲對象，研究了缺陷廻波特征的評價與模式識別。In the process of ultrasonic testing, the quality of flaw echo signals in A-scan lay a better determinant foundation for locational, quantitative and qualitative evaluation.超聲檢測中缺陷廻波信號的質(zhì)量是實現(xiàn)缺陷定位定量定性分析與評價的基礎(chǔ)，去噪是超聲檢測信號処理中很重要的環(huán)節(jié)。flaw echo更多例句詞組短語短語ultrasonic flaw echo 超聲缺陷廻波Review of flaw echo waveform 缺陷波形廻放echo for flaw 缺陷廻波flaw echo更多詞組專業(yè)釋義動力與電氣工程缺陷反射波冶金工程技術(shù)缺陷的廻波信號