马尔可夫模型评估算法的相关内容

隐马尔可夫模型（六）——隐马尔可夫模型的评估问题(前向后向相结合算法）

重新回顾：前向变量αt(i):在时刻t,在已知模型μ=（A,B,π）的条件下，状态处于si,输出序列为O102...Ot,前向变量为αt(i) 后向变量βt(i):在时刻t,在已知模型μ=（A,B,π）和状态处于si的条件...

隐马尔可夫模型（四）——隐马尔可夫模型的评估问题(后向算法）

对于HMM的评估问题，利用动态规划可以用前向算法，从前到后算出前向变量；也可以采用后向算法，从后到前算出后向变量。先介绍后向变量βt(i):给定模型μ=（A,B,π），并且在时间时刻t 状态为si 的前提下，输出序列为Ot+1Ot+2...OT的概率，即 ...

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更新时间 2022-12-20 13:39:11

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