hmm算法序列的相关内容

隐马尔科夫模型HMM（四）维特比算法解码隐藏状态序列

在本篇我们会讨论HMM模型最后一个问题的求解，即即给定模型和观测序列，求给定观测序列条件下，最可能出现的对应的隐藏状态序列。在阅读本篇前，建议先阅读这个系列的第一篇以熟悉HMM模型。HMM模型的解码问题最常用的算法是维特比算法，当然也有其他的算法可以求解这个问题。同时维特比算法是一个通用的求序列最短...

隐马尔科夫模型HMM（二）前向后向算法评估观察序列概率

　在隐马尔科夫模型HMM（一）HMM模型中，我们讲到了HMM模型的基础知识和HMM的三个基本问题，本篇我们就关注于HMM第一个基本问题的解决方法，即已知模型和观测序列，求观测序列出现的概率。1. 回顾HMM问题一：求观测序列的概率首先我们回顾下HMM模型的问题一。这个问题是这样的。我们已知HMM模型...

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隐马尔科夫模型HMM（二）前向后向算法评估观察序列概率

1. 回顾HMM问题一：求观测序列的概率　　　　首先我们回顾下HMM模型的问题一。这个问题是这样的。我们已知HMM模型的参数λ=(A,B,Π)。其中A是隐藏状态转移概率的矩阵，B是观测状态生成概率的矩阵， Π是隐藏状态的初始概率分布。同时我们也已经得到了观测序列O={o1,o2,...o...

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更新时间 2024-02-12 10:24:29

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