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季节内振荡研究中两种数字滤波器的性能对比
引用本文:姚菊香,王盘兴,李丽平.季节内振荡研究中两种数字滤波器的性能对比[J].南京气象学院学报,2005,28(2):248-253.
作者姓名:姚菊香  王盘兴  李丽平
作者单位:南京信息工程大学,大气科学系,江苏,南京,210044
基金项目:国家自然科学基金重点资助项目(40233037)
摘    要:就长序列资料的MJO滤波,分析了Lanczos滤波器与Butterworth滤波器的滤波性能,结果表明:1)在滤波器参数n足够大时,Lanczos滤波器对MJO信息的滤出和对非MJO信息盼抑制均优于Butterworth滤波器;2)在分辨率为△=1d、MJO为30~60d定义下,Lanczos滤波器参数的阈值n1=69d,当n≥n1时,可以保证Lanczos滤波器优越性成立。

关 键 词:季节内振荡  Lanczos滤波器  Butterworth滤波器  性能分析
文章编号:1000-2022(2005)02-0248-06

Performance Contrast between Two Filters in Madden-Julian Oscillations Analysis
YAO Ju-xiang,WANG Pan-xing,LI Li-ping.Performance Contrast between Two Filters in Madden-Julian Oscillations Analysis[J].Journal of Nanjing Institute of Meteorology,2005,28(2):248-253.
Authors:YAO Ju-xiang  WANG Pan-xing  LI Li-ping
Abstract:The performance of Lanczos filter and Butterworth filter was analysed based on filtering Madden-Julian Oscillation signal from long sequences.The results indicate that Lanczos filter is better than Butterworth filter when parameter n is large enough and when n is larger than threshold value 69 day,the advantage of Lanczos is absolutely tenable.
Keywords:Madden-Julian Oscillation  Lanczos filter  Butterworth filter  performance analysing
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