| 袁新宇，刘良军，周剑良*.γ能谱滤波方法比对研究[J].南华大学学报(自然科学版),2011,25(2):1~5.[YUAN Xin-yu,LIU Liang-jun,ZHOU Jian-liang*.Comparative Study on γ-ray Spectrum by Several Filtering Method[J].Journal of University of South China(Science and Technology),2011,25(2):1~5.] |
| γ能谱滤波方法比对研究 |
| Comparative Study on γ-ray Spectrum by Several Filtering Method |
| 投稿时间：2011-04-07 |
| DOI： |
| 中文关键词: 改进重心法 小波分析 傅立叶变换法 改进阈值 |
| 英文关键词:improved gravity model approach wavelet analysis fourier transform method improved threshold |
| 基金项目:江西省教育厅青年科学基金资助项目（GJJ10176）；核技术应用教育部工程研究中心（东华理工大学）开放基金资助项目（HJSJYB2010-07） |
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| 中文摘要: |
| 对现行各种γ能谱滤波方法进行比对研究，发现各种滤波方法对能谱数据均有一定压缩与展宽；能域滤波时，谱线展宽增加重峰出现几率；频域滤波时，应注意滤波器及其参数的选取；小波变换能很好地保持信号的高频突变成分不受破坏，相比较而言，改进阈值方法能很好地保留硬阈值与软阈值的优点，适于弱峰的检测.针对重心法滤波器的不足，提出一种1倍标准差检测滤波算法，该方法能很好地保留能谱突变成分，维持谱峰净面积基本不变，对平台滤波效果等同于5点重心法，且算法简单. |
| 英文摘要: |
| Comparative study was conducted on results of gamma-ray spectrum by using a majority of active smoothing method,which were used to show filtering effect.The results showed that peak was widened and overlap peaks increased with energy domain filter in γ-ray spectrum.Filter and its parameters should be seriously taken into consideration in frequency domain.Wavelet transformation can keep signal in high frequency region well.Improved threshold method showed the advantages of hard and soft threshold method at the same time by comparison,which was suitable for weak peaks detection.A new filter was put forward to eke out gravity model approach,whose denoise level was detected by standard deviation.This method not only kept signal and net area of peak well,but also attained better result and had simple computer program. |
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