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中国工业与应用数学学会会刊
主管:中华人民共和国教育部
主办:西安交通大学
ISSN 1005-3085  CN 61-1269/O1

工程数学学报 ›› 2015, Vol. 32 ›› Issue (2): 205-212.doi: 10.3969/j.issn.1005-3085.2015.02.005

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关于树指标隐Markov链及其等价定义

王  豹1,2,   杨卫国1   

  1. 1- 江苏大学理学院,镇江  212013
    2- 徐州工程学院数理学院,徐州 221000
  • 收稿日期:2013-07-22 接受日期:2014-01-21 出版日期:2015-04-15 发布日期:2015-06-15
  • 基金资助:
    国家自然科学基金 (11071104);江苏省高校自然科学基金 (14KJB110025);江苏省普通高校研究生科研创新计划项目 (CXLX 12-0652);徐州工程学院青年基金 (XKY2012301).

Equivalent Definitions of T-indexed Hidden Markov Chains

WANG Bao1,2,   YANG Wei-guo1   

  1. 1- School of Science, Jiangsu University, Zhenjiang 212013
    - Mathematics and Physical Sciences Technology, Xuzhou Institute of Technology, Xuzhou 221000
  • Received:2013-07-22 Accepted:2014-01-21 Online:2015-04-15 Published:2015-06-15
  • Supported by:
    The National Nature Science Foundation of China (11071104); The National Science Fund for Colleges and Universities of Jiangsu Province (14KJB110025); the Postgraduate Innovation Projection of Jiangsu's University (CXLX12-0652); the Youth Foundation of Xuzhou Institute of Technology (XKY2012301).

摘要: 本文参照直线上隐Markov模型的概念,给出有限树指标隐Markov链的定义.在该定义中,树指标隐Markov链由两个树指标随机过程组成,其中第一个树指标随机过程是树指标Markov链,是不能被直接观测到的隐藏链;第二个树指标随机过程是可被观测的且关于第一个树指标随机过程条件独立,对于树上的任意一个顶点,第二个随机过程此处的取值只信赖于隐藏链中此处的取值.最后,我们给出了树指标隐Markov链的三个等价定义.

关键词: 隐Markov模型, 树, 树指标隐Markov链

Abstract:

In this paper, we give the definition of tree indexed hidden Markov chain with finite state space based on the concept of hidden Markov model. In our definition, tree indexed hidden Markov chain consists of two tree indexed random processes. The underlying process is a tree indexed Markov chain and can not be observed, and the second process is conditional independent of the former. For the arbitrary vertex in tree, the second process only dependents on the underlying process. Finally, we propose three equivalent definitions.

Key words: hidden Markov model, tree, tree indexed hidden Markov chain

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