| DNA序列的多重分形Hurst分析 |
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| 引用本文： | 蒋丽丽,徐振源,高洁.DNA序列的多重分形Hurst分析[J].生物信息学,2009,7(4):264-267. |
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| 作者姓名： | 蒋丽丽 徐振源 高洁 |
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| 作者单位： | 1. 江南大学理学院,无锡,214122
2. 江南大学信息学院,无锡,214122 |
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| 摘 要： | 为了深入研究基因组序列的多重分形性质，首先选取12条较长的DNA序列，并根据此12条DNA序列的编码／非编码片段将DNA序列转换成相应的12条时间序列，其次对这12个时间序列进行多重分形Hurst分析，计算它们的Hurst指数，并且利用Hurst指数分析序列的自相似性，进一步将得到的Hurst指数与DNA一维游走模型相比较，发现12条序列均具有长程相关性，这说明DNA序列中确实存在着长程相关现象。
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| 关 键 词： | 多重分形 R／S模型 Hurst指数 CGR图形 |
Multifractal Hurst analysis of DNA sequence |
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| JIANG Li-li,XU Zhen-Yuan,GAO Jie.Multifractal Hurst analysis of DNA sequence[J].China Journal of Bioinformation,2009,7(4):264-267. |
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| Authors: | JIANG Li-li XU Zhen-Yuan GAO Jie |
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| Institution: | 1 . school of Science, Jiangnan University , Wuxi 214122,China; 2. School of Information Technology, Jiaztgnan University, Wuxi 214122, China ) |
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| Abstract: | To describe the fractal feature of genomes sequences, a multifractal theory is presented in the analysis. 12 long gene sequences are selected and these DNA sequences are translated into time series according to their coding/noncoding segments, then the Hurst exponent of 12 time series was calculated and their self-comparability were further analyzed according their Hurst exponent.Comparing Hurst exponent with DNA walk model, it is found that these gene sequences have long-range correlation. |
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| Keywords: | Multifractal R/S model Hurst exponent CGR graph |
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