摘要
提出了一种用于低放射性活性炭测氡的γ能谱消噪的小波阈值函数。在Matlab平台上,通过对野外实测γ能谱的消噪处理,对比分析了多点均滑消噪、傅里叶变换消噪、小波软阈值消噪及新阈值函数消噪的优缺点。结果表明:应用阈值函数对低放射性γ能谱的消噪,在反映γ能谱特征的峰本比、峰高、峰面积及本底值参数方面的效果优于传统的方法,且保留了原始信号的细节特征,具有较高的实用价值。
A wavelet thresholding function used to denoise radon γ energy spectra of low radioactivity method,was proposed in the paper.By analyzing field test results,three traditional denoising methods,multi-points smoothing,FFT and wavelet soft threshold-ing function were compared with the wavelet thresholding function.Analyzing results show that by using wavelet thresholding function γ energy spectra characteristics,such as peak ratio,peak counts,peak area and background are much clearer than those by using traditional denoising methods.At the mean time,this method can keep detail character of original signal.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2010年第8期897-901,共5页
Atomic Energy Science and Technology
基金
成都理工大学地球探测与信息技术教育部重点实验室资助项目(2008DKF013)
关键词
氡
小波分析
阈值函数
γ射线能谱
radon
wavelet analysis
thresholding function
γ-ray spectrum
