摘要
针对硝铵(AN)核电四极矩共振(NQR)信号通过傅立叶变换频域分析缺乏信号时域信息的特点,对硝铵NQR信号进行时频分析,达到从强背景噪声下检测出NQR信号的目的.引入小波分析阀值去噪的方法对硝铵NQR信号进行处理.对处理后数据与标准信号之间的相关系数进行分析.实验结果表明小波阀值去噪方法可以成功检测到硝铵的NQR信号.
Frequency domain analysis of nuclear quadruple resonance （NQR） signal of ammonium nitrate （AN） via Fourier transform lacks time domain information. In this work, a threshold de-noising method, which is based on wavelet transform, for analyzing time-domain NQR signals of AN in the presence of strong background noise was proposed. The correlation coefficients between the processed signals and the signals of a standard sample were calculated, which were found to increase with the close of AN.
出处
《波谱学杂志》
CAS
CSCD
北大核心
2009年第4期504-511,共8页
Chinese Journal of Magnetic Resonance
