基于Hilbert-Huang变换的径流演变周期提取

英文篇名：Period retrieval of runoff time series based on Hilbert-Huang conversion
中文刊名：西北水电
英文刊名：Northwest Hydropower
作者：吴晓刚 ; 燕爱玲 ; 黄强
英文作者：WU Xiao-gang1 ; YAN Ai-ling2 ; HUANG Qiang2(1.Northwest Institute of Forestry Survey ; Planning and Design ; SFA ; Xi'an 710048 ; China ; 2.Xi'an University of Technology ; Xi'an 710048 ; China)
中文关键词：径流序列 ; Hilbert-Huang变换 ; 演变周期
英文关键词：runoff time series ; Hilbert-Huang conversion ; evolutional period
出版日期：2007-09-20
机构：国家林业局西北调查规划设计院,西安理工大学,西安理工大学西安710048,西安710048,西安710048
年：2007
期：03
出版单位：西北水电

摘要

提出一种基于Hilbert-Huang变换的周期提取方法。对径流序列直接进行变换后,经频率搜索处理得到径流波动频率及其演变过程。通过对黄河上游兰州站径流序列的分析,表明该方法能够真实地描述径流序列的非平稳非线性特性,具有很高的准确性与可行性。
A period retrieval method is presented based on Hilbert-Huang conversion.After runoff time series is directly conversed,the runoff fluctuation frequency and its evolution process are obtained by means of frequency search.Runoff time series at Lanzhou meteorological station upstream of the Yellow River is analyzed,and the results indicate that the method based on Hilbert-Huang conversion can not only describe the non-linear and non-stationary characteristics of the runoff,but also have higher accuracy and feasibility.

引文

[1]Huang NE,Shen Z,Long SR,etal.The empirical mode decomposi-tion and Hilbert spectrum for nonlinear and non-stationary timeseries analysis[J].Proc R Soc Lond,1998,A454:903-995.
    [2]陈子雄,吴琛,周瑞忠.希尔伯特-黄变换谱及其在地震信号分析中的应用[J].福州大学学报(自然科学版),2006,4(34):260-265.
    [3]杨志华,齐东旭,杨力华.一种基于Hilbert-Huang变换的基音周期检测新方法[J].计算机学报,2006,(1):54-62.
    [4]谭善文,秦树人.Hilbert-Huang变换的滤波特性及其应用[J],重庆大学学报,2004,(2):9-13.
    [5]赵雪花,黄强.黄河上游径流变化的影响因素分析研究[J].自然科学进展,2004,(6):700-705.