重庆大学学报：自然科学版2011，Vol.34Issue(7)：76-82,7.
煤层瓦斯吸附解吸过程中温度信号的小波去噪方法
Wavelet denoising method of temperature signal in the process of coal gas absorption and desorption
摘要
Abstract
The study on the temperature evolutionary trend under both the ground stress and gas pressure is significant in the process of coal gas absorption and desorption.However,the valid signal is difficult to gain because of much noise in the experimental data,so according to the characteristics of the temperature signal gained under different experimental conditions of coal gas absorption and desorption,this essay filtrates noise and restores the valid signal by using the wavelet denoising of MATLAB to obtain the valid temperature evolutionary curve.Through contrasting and analyzing wavelet basis function and different decomposition levels,the essay chooses the sym8 wavelet basis function which has a higher order of vanishing moments and better smoothness.The reconstructed signal filtrates most of high frequency signal,and keep low frequency,as well as smooth signal.The result shows that the de-noising effect is good and the temperature evolution rule can be well reflected in the process of the coal gas absorption and desorption.关键词
小波去噪/煤层瓦斯/吸附解吸/温度Key words
wavelet denoising/coal gas/absorption and desorption/temperature分类
矿业与冶金引用本文复制引用
许江,吴鑫,彭守建,杨红伟..煤层瓦斯吸附解吸过程中温度信号的小波去噪方法[J].重庆大学学报：自然科学版,2011,34(7):76-82,7.基金项目
国家自然科学基金项目 （）
国家重点基础研究发展计划（973计划）资助项目 （）
国家科技重大专项项目 （）
中央高校基本科研业务费资助 （）
重庆大学“211工程”三期创新人才培养计划建设项目 （）
