气液两相鼓泡床双电阻信号的小波消噪处理Wavelet Denoising Treatment of Dual Electroresistivity Probe Signals Measured from Liquid-Gas Two Phase Bubble Column
杨茹,徐建伟,潘立登,刘辉,李成岳,李建伟
摘要(Abstract)：
将ManojitRoy等提出的简易小波消噪算法应用于气液两相流中双电阻探针测量信号的消噪处理中发现,该法在消噪的同时也将原始信号中的部分气泡能量去除,造成消噪信号明显失真。今对原算法中尺度阈值的判定方法进行了改进,也即,选取带噪信号求导数据小波分解后尺度-能量分布曲线中相邻两尺度间连线斜率的最大绝对值作为消噪尺度阈值的新判据;结果表明,改进后的算法可以取得较好的消噪效果。
关键词(KeyWords)： 小波变换;消噪;气液两相流;气含率
基金项目(Foundation):
作者(Author): 杨茹,徐建伟,潘立登,刘辉,李成岳,李建伟
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