| 煤的DTG曲线不同消噪方法分析 |
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| 引用本文： | 李培生,余量,胡益,李洁,胡松,向军,孙路石.煤的DTG曲线不同消噪方法分析[J].煤炭学报,2007,32(3):309-313. |
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| 作者姓名： | 李培生 余量 胡益 李洁 胡松 向军 孙路石 |
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| 作者单位： | 武汉大学 动力与机械工程学院， 湖北 武汉，430072 |
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| 摘 要： | 分别将傅里叶低通滤波器方法、21点平均法和小波方法用于一种贫煤DTG信号的消噪中，发现小波法效果较好.当小波基为bior 6.8，sqtwolog阈值规则时，其消噪效果最优.通过对滤除噪声的特性分析发现，小波方法和21点平均法滤除的噪声具有独立分布特性，且类似高斯分布.
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| 关 键 词： | 煤 热重 去噪 小波 |
| 文章编号： | 0253-9993(2007)03-0309-05 |
| 收稿时间： | 2006-06-29 |
| 修稿时间： | 2006年6月29日 |
Analysis of coal derivative hermogravimetry signal noise removal with different methods |
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| LI Pei-sheng,YU Liang,HU Yi,LI Jie,HU Song,XIANG Jun,SUN Lu-shi.Analysis of coal derivative hermogravimetry signal noise removal with different methods[J].Journal of China Coal Society,2007,32(3):309-313. |
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| Authors: | LI Pei-sheng YU Liang HU Yi LI Jie HU Song XIANG Jun SUN Lu-shi |
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| Abstract: | Denoise of derivative hermogravimetry(DTG) signal of a kind of lean coal by Fourier low-pass filter,21-point average method and wavelet threshold method was studied.Results show that the wavelet threshold method is better among method above from the parameter of power spectrum,signal/noise and time shift.When the wavelet basis is bior 6.8 and the threshold method is sqwtolog,the effect of denoise quality with wavelet threshold method is the best one.Statistics characters of the noises that filtered by wavelet threshold method and 21-point average method show that they are independent distribution and similar to Gauss distribution. |
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| Keywords: | coal derivative thermogravimetric noise removal wavelet method |
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