| 基于小波消噪和符号动力学的参考作物腾发量变化的复杂性研究 |
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| 引用本文： | 陈涛涛,迟道才,孟丽丽.基于小波消噪和符号动力学的参考作物腾发量变化的复杂性研究[J].沈阳农业大学学报,2012,43(1):85-89. |
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| 作者姓名： | 陈涛涛 迟道才 孟丽丽 |
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| 作者单位： | 1. 沈阳农业大学水利学院,沈阳,110161
2. 营口市水利勘测建筑设计院,辽宁营口,115002 |
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| 基金项目： | 辽宁省“百千万人才工程”资助项目 |
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| 摘 要： | 提出了基于小波消噪的符号动力学途径研究参考作物腾发量(ET0)变化的复杂度,以辽宁省的锦州、北镇、义县、黑山4个站为例,对各气象因素(1957～2006年)及ET0序列进行小波消噪,运用Lempel-Ziv算法计算其复杂度。结果表明:整个锦州市由于噪声影响ET0的平均复杂度为9.25,较真实序列平均复杂度大;义县ET0变化比其他3个站复杂;从时间上分析,锦州4个站中有3个站(锦州、义县、黑山)近20年呈现下降趋势。从符号动力学的角度研究ET0系统的复杂性,为ET0研究提供了新的工具。
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| 关 键 词： | 符号动力学 参考作物腾发量 复杂度 小波消噪 Lempel-Ziv 锦州 |
Complexity of Reference Evapotranspiration Based on Wavelet De-noising and Symbolic Dynamics |
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| CHEN Tao-tao
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CHI Dao-cai
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MENG Li-li.Complexity of Reference Evapotranspiration Based on Wavelet De-noising and Symbolic Dynamics[J].Journal of Shenyang Agricultural University,2012,43(1):85-89. |
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| Authors: | CHEN Tao-tao CHI Dao-cai MENG Li-li |
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| Institution: | 1.College of Water Conservancy,Shenyang Agricultural University,Shenyang 110161,China;2.Yingkou Institute of Water Resources Engineering Survey and Construct,Yingkou Liaoning 115002,China) |
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| Abstract: | Complexity reference evapotranspiration(ET0) was studied based on wavelet de-noising and symbolic dynamics.With Jinzhou,Beizhen,Yixian and Heishan four stations in Liaoning as application examples,wavelet de-noising was carried out for meteorological factors and ET0 sequence attained from these four stations(1957-2006) and then the complexity could be calculated using Lempel-Ziv algorithm.The average complexity of ET0 in Jinzhou as a whole was 9.25 because of noise influence,greater than its real average complexity;Yixian ET0 variation was more complex than that of other three stations.In terms of temporal trend analysis,there was a decrease in complexity in three stations,namely,Jinzhou,Yixian and Heishan.In a word,the complexity research of ET0 system from the perspective of symbolic dynamics provided a new tool for ET0 research. |
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| Keywords: | symbolic dynamics reference evapotranspiration complexity wavelet de-noising Lempel-Ziv Jinzhou |
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