超临界水自然循环流量信号降噪分析
|
摘要
当自然循环流量的时间序列信号存在噪声时,在计算分析时可能产生错误结论。为了避免错误的产生,在超临界水自然循环流动实验数据信号的基础上,通过选择各种不同的小波基函数,对实验流量信号进行信号去噪分析。通过指标计算对比分析,结果表明,经Dmey小波基函数变换后的自然循环流量去噪信号值,其标准偏差和均方根误差(RMSE)最小、相关系数最大、信噪比较高。因此,Dmey小波基函数适用于超临界水自然循环流量实验数据的信号降噪分析处理。
When there is noise in the time series signal of the natural circulation flow, wrong conclusion could be arrived in the calculation and analysis. In order to avoid this result, based on the experimental data signal of the supercritical water natural circulation flow, the denoising of the experimental flow signal is analyzed by selecting various wavelet basis functions. The calculation and comparison of the indicators showed that, the denoised signal value for the natural circulation flow after Dmey wavelet base function transformation are with miminum standard deviation and root-mean-square error(RMSE), maximum correlation coefficient and high noise-signal ratio. The wavelet basis functions is suitable for the analysis and treatment of the signal denoising of the experimental data of supercritical water natural circulation flow.
When there is noise in the time series signal of the natural circulation flow, wrong conclusion could be arrived in the calculation and analysis. In order to avoid this result, based on the experimental data signal of the supercritical water natural circulation flow, the denoising of the experimental flow signal is analyzed by selecting various wavelet basis functions. The calculation and comparison of the indicators showed that, the denoised signal value for the natural circulation flow after Dmey wavelet base function transformation are with miminum standard deviation and root-mean-square error(RMSE), maximum correlation coefficient and high noise-signal ratio. The wavelet basis functions is suitable for the analysis and treatment of the signal denoising of the experimental data of supercritical water natural circulation flow.
引文
[1]蒋薇薇,鲁昌华,张玉钧,等.基于提升小波改进阈值的光谱信号去噪研究[J].电子测量与仪器学报,2014,28(12):1363-1368.
[2]吴光文,王昌明,包建东,等.基于自适应阈值函数的小波阈值去噪方法[J].电子与信息学报,2014,36(6):1340-1347.
[3]周涛,琚忠云,张蕾,等.矩形窄通道内临界热流密度的小波分析研究[J].核科学与工程,2014,34(3):278-284.
[4]章浙涛,朱建军,匡翠林,等.小波包多阈值去噪法及其在形变分析中的应用[J].测绘学报,2014,(1):13-20.
[5]张小燕,吐尔洪江,阿布都克力木.小波变换的阈值图像去噪算法改进[J].计算机技术与发展,2017,27(3):81-84.
[6]吕瑞兰.小波阈值去噪的性能分析及基于能量元的小波阈值去噪方法研究[D].杭州:浙江大学,2003.
[7]朱建军,章浙涛,匡翠林,等.一种可靠的小波去噪质量评价指标[J].武汉大学学报(信息科学版),2015,40(5):688-694.
[8]李红延,周云龙,田峰,等.一种新的小波自适应阈值函数振动信号去噪算法[J].仪器仪表学报,2015,36(10):2200-2206.
[9]赵鹏,孙斌,刘天栋.一种新型改进阈值函数的第二代小波降噪方法[J].热能动力工程,2011,26(3):284-289.
[10]段瑞玱,李玉和,李庆祥.小波函数的选择及其对图像滤波性能影响[J].计算机应用,2005,25(s1):219-220.
[11]FLETCHER P,SANGWINE S J.The development of the quaternion wavelet transform[J].Signal Processing,2017,136:2-15.
[12]STOCCHI M,MARCHESI M.Fast wavelet transform assisted predictors of streaming time series[J].SoftwareX,2018,77:5-12.
[13]JANET J P,LIAO Y,LUCAS D.Heterogeneous nucleation in CFD simulation of flashing flows in converging-diverging nozzles[J].International Journal of Multi-phase Flow,2015,74:106-117.
[14]TANG J,HUANG M,ZHAO Y,et al.A new procedure for solving steady-state and transient-state nonlinear radial conduction problems of nuclear fuel rods[J].Annals of Nuclear Energy,2017,110:492-500.
[15]宋明强.跨临界自然循环流动不稳定性研究[D].北京:华北电力大学,2017.
[2]吴光文,王昌明,包建东,等.基于自适应阈值函数的小波阈值去噪方法[J].电子与信息学报,2014,36(6):1340-1347.
[3]周涛,琚忠云,张蕾,等.矩形窄通道内临界热流密度的小波分析研究[J].核科学与工程,2014,34(3):278-284.
[4]章浙涛,朱建军,匡翠林,等.小波包多阈值去噪法及其在形变分析中的应用[J].测绘学报,2014,(1):13-20.
[5]张小燕,吐尔洪江,阿布都克力木.小波变换的阈值图像去噪算法改进[J].计算机技术与发展,2017,27(3):81-84.
[6]吕瑞兰.小波阈值去噪的性能分析及基于能量元的小波阈值去噪方法研究[D].杭州:浙江大学,2003.
[7]朱建军,章浙涛,匡翠林,等.一种可靠的小波去噪质量评价指标[J].武汉大学学报(信息科学版),2015,40(5):688-694.
[8]李红延,周云龙,田峰,等.一种新的小波自适应阈值函数振动信号去噪算法[J].仪器仪表学报,2015,36(10):2200-2206.
[9]赵鹏,孙斌,刘天栋.一种新型改进阈值函数的第二代小波降噪方法[J].热能动力工程,2011,26(3):284-289.
[10]段瑞玱,李玉和,李庆祥.小波函数的选择及其对图像滤波性能影响[J].计算机应用,2005,25(s1):219-220.
[11]FLETCHER P,SANGWINE S J.The development of the quaternion wavelet transform[J].Signal Processing,2017,136:2-15.
[12]STOCCHI M,MARCHESI M.Fast wavelet transform assisted predictors of streaming time series[J].SoftwareX,2018,77:5-12.
[13]JANET J P,LIAO Y,LUCAS D.Heterogeneous nucleation in CFD simulation of flashing flows in converging-diverging nozzles[J].International Journal of Multi-phase Flow,2015,74:106-117.
[14]TANG J,HUANG M,ZHAO Y,et al.A new procedure for solving steady-state and transient-state nonlinear radial conduction problems of nuclear fuel rods[J].Annals of Nuclear Energy,2017,110:492-500.
[15]宋明强.跨临界自然循环流动不稳定性研究[D].北京:华北电力大学,2017.