| 不同小波去噪法处理热重信号的研究 |
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| 引用本文： | 徐朝芬,胡松,孙学信,向军.不同小波去噪法处理热重信号的研究[J].华中科技大学学报(自然科学版),2005,33(6):41-43. |
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| 作者姓名： | 徐朝芬 胡松 孙学信 向军 |
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| 作者单位： | 华中科技大学,煤燃烧国家重点实验室,湖北,武汉,430074;华中科技大学,煤燃烧国家重点实验室,湖北,武汉,430074;华中科技大学,煤燃烧国家重点实验室,湖北,武汉,430074;华中科技大学,煤燃烧国家重点实验室,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目(50177020). |
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| 摘 要： | 通过对恒温DTG曲线的小波去噪研究，发现采用不同的小波以及小波分解层次都会影响到最终的去噪效果．利用信噪比、均方根误差和李氏指数等指标作为评判标准，比较了不同去噪信号的特征，并确定了最佳的小波去噪参数．同时对过滤得到的噪声信号进行分析，发现这些噪声信号符合白噪声的标准，通过比较小波去噪与相邻点平均法和傅里叶过滤法，证明小波法在处理DTG信号时具有优势。
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| 关 键 词： | 恒温微分热失重 多分辨率分析 信噪比 Lipschitz指数 |
| 文章编号： | 1671-4512(2005)06-0041-03 |
| 修稿时间： | 2004年11月22 |
Processing of different wavelet denoise methods with thermogravimetry signals |
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| Xu Chaofen,Hu Song,Sun Xuexin,Xiang Jun.Processing of different wavelet denoise methods with thermogravimetry signals[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2005,33(6):41-43. |
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| Authors: | Xu Chaofen Hu Song Sun Xuexin Xiang Jun |
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| Institution: | Xu Chaofen Hu Song Sun Xuexin Xiang Jun Xu Chaofen Engineer, State Key Lab. of Coal Combustion,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. |
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| Abstract: | Isothermal DTG signal was with wavelet denoise, it was found that denoise effect would be infected by the different wavelets or different decomposing levels. The characteristics of different denoised signals were compared by the use of several index, such as SNR, RMSE and Lipschitz exponent, and the optimal parameters of wavelet denoiseing. It was seen that these signals accord with the white noise standard. Therefore, it is concluded that wavelet denoise method is the most effective way to deal with DTG signal after we compared it with other processing methods. |
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| Keywords: | isothermal differential thermogranvimetic multi-resolution analysis signal/noise ratio Lipschitz exponent |
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