| 改进的带驻留时间隐Markov模型的前向-后向算法 |
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| 引用本文： | 杜世平. 改进的带驻留时间隐Markov模型的前向-后向算法[J]. 纯粹数学与应用数学, 2008, 24(3) |
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| 作者姓名： | 杜世平 |
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| 作者单位： | 四川农业大学生命科学与理学院数学系,四川,雅安,625014 |
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| 摘 要： | 对隐Maxkov模型(hidden Markov model:HMM)的状态驻留时间的概率进行了修订,给出了改进的带驻留时间隐Markov模型的结构,并在传统的隐Markov模型(traditional hidden Markov model:THMM)的基础上讨论了新模型的前向.后向变量,导出了新模型的前向-后向算法的迭代公式,同时也给出了新模型各个参数的重估公式.
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| 关 键 词： | 隐 Markov模型 前向-后向算法 驻留时间 |
An modified forward-backward algorithm for duration hidden Markov model |
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| DU Shi-ping. An modified forward-backward algorithm for duration hidden Markov model[J]. Pure and Applied Mathematics, 2008, 24(3) |
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| Authors: | DU Shi-ping |
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| Affiliation: | DU Shi-ping Department of mathematics,Sichuan Agricultural University,Ya'an 625014,China |
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| Abstract: | In this paper ,new probability of state duration is defined,and the structure of modified Hidden Markov Models(HMM) with duration is discussed, new forward-backward variables are defined and also recursive formulas are given about forward-backward algorithm based on traditional HMM. In addition,the reestimation formulas of the parameters about new models are brought forward using new forward-backward algorithm. |
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| Keywords: | Hidden Markov models(HMM) Forward-backward algorithm Station duration |
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