NASVD法处理地面γ能谱噪声  

Denoising of Ground Gamma-ray Spectra by NASVD Method

作　　者：杨佳[1] 李晓丽[1] YANG Jia LI Xiao -li(The College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China)

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059

出　　处：《核电子学与探测技术》2017年第2期134-137,共4页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(41374136;41474159);高等学校博士学科点专项科研基金(20125122120009)资助

摘　　要：为了提高地面γ能谱数据降噪处理的效果,介绍了NASVD法的基本原理及算法,并对某实测地面γ能谱数据集采用NASVD法和传统LS法进行降噪处理实验对比,结果表明:相对于LS法,NASVD法能够显著减少原始谱线中的统计涨落现象,更适合单次测量场合获取的γ能谱数据集降噪处理。In order to improve the denoising effect of ground gamma - ray spectra data, the basic principle and algorithm of the NASVD method （ Noise Adjusted Singular Value Decomposition） are introduced in the paper. To compare the effect of noise reduction, the NASVD method and the traditional LS method are used to a ground gamma - ray dada set, the result has shown that compared with the LS method, the NASVD method can dramat- ically remove statistical noise from raw gamma - ray spectra, and is more suitable for the noise reduction of gam- ma -ray spectra data set obtained from single measurement occasions.

关 键 词：地面γ能谱测量 NASVD方法 能谱降噪 谱线重构 

分 类 号：P631.62[天文地球—地质矿产勘探]