| 月降雨序列的混沌判定的合理性分析 |
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| 引用本文： | 路剑飞,陈子燊. 月降雨序列的混沌判定的合理性分析[J]. 水电能源科学, 2011, 29(3) |
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| 作者姓名： | 路剑飞 陈子燊 |
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| 作者单位： | 中山大学,地理科学与规划学院水资源与环境系,广东,广州,510275 |
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| 基金项目： | 国家自然科学重点基金资助项目，2009年广东省水利创新研究基金资助项目 |
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| 摘 要： | 针对目前月降雨序列混沌特性研究中存在的问题,以广东省西江流域高要站月降雨序列为例,运用功率谱方法、主成分分析法、饱和关联维数法、C-C方法进行了混沌特性的判定及特征参数的求取,同时分析了数据长度和噪声对混沌研究的影响.研究结果表明,利用功率谱方法进行混沌判定时,单纯的根据连续多峰的噪声背景作为判定混沌存在的依据并不可靠;饱和关联维数法仅从能量角度对混沌序列进行判定,此外,对混沌序列进行滤波会导致此法判定结果的稳健性降低,C-C方法证明了其计算结果的可靠性;为计算出相对稳定的饱和关联维D2,计算数据的长度至少应为450个点;递归图及相应的各种定量判定标准验证了改进的双小波空域降噪方法可有效去除混沌序列中噪声的影响.
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| 关 键 词： | 月降雨序列 混沌 功率谱 相空间 递归图 |
Reasonability Analysis of Chaotic Identification of Monthly Rainfall Series |
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| LU Jianfei,CHEN Zishen. Reasonability Analysis of Chaotic Identification of Monthly Rainfall Series[J]. International Journal Hydroelectric Energy, 2011, 29(3) |
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| Authors: | LU Jianfei CHEN Zishen |
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| Affiliation: | LU Jianfei,CHEN Zishen(Department of Water Resources and Environment,School of Geography and Planning,Sun Yat-sen University,Guangzhou 510275,China) |
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| Abstract: | A discussion is conducted due to several problems presented in chaotic research of monthly rainfall series.As an example,monthly precipitation data of Gaoyao Station in West River basin in Guangdong Province is utilized for chaotic identification and calculation of characteristic parameters via power spectrum method,PCA,G-P Algorithm and C-C method.Impacts of data length and noise in the dataset are also studied.The results show that it is not reliable to judge a chaotic feature reflected on the power spect... |
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| Keywords: | PCA |
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