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计算机工程 ›› 2012, Vol. 38 ›› Issue (21): 33-35. doi: 10.3969/j.issn.1000-3428.2012.21.009

• 软件技术与数据库 • 上一篇    下一篇

不确定时间序列的规约方法

吴红花1,刘国华1,2   

  1. (1. 东华大学计算机科学与技术学院,上海 201620;2. 南京大学计算机软件新技术国家重点实验室,南京 210093)
  • 收稿日期:2011-12-30 出版日期:2012-11-05 发布日期:2012-11-02
  • 作者简介:吴红花(1986-),女,硕士研究生,主研方向:不确定性数据库;刘国华,教授、博士生导师、CCF高级会员
  • 基金资助:
    国家自然科学基金资助项目(61070032)

Specification Method of Uncertainty Time Series

WU Hong-hua   1, LIU Guo-hua   1,2   

  1. (1. College of Computer Science and Technology, Donghua University, Shanghai 201620, China; 2. State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210093, China)
  • Received:2011-12-30 Online:2012-11-05 Published:2012-11-02

摘要: 为提高不确定时间序列的查询效率,在对不确定时间序列数据集进行建模的基础上,提出由不确定时间序列向确定时间序列的 3种规约方法,分别为概率最大法、混合规约法和均值法,并给出具体的规约过程。实验结果表明,上述3种规约方法能减少时间序列的不确定性,为其相似性匹配、搜索和查询操作提供依据。

关键词: 不确定时间序列, 查询复杂度, 概率最大法, 均值法, 规约方法

Abstract: In order to improve the uncertainty of time sequence query efficiency, on the base of uncertainty time series data set modeling, this paper presents three kinds of specification method from uncertain time series to certain time series, including probability maximum method, mixed specification method and mean value method, and gives specification process. Experimental result shows that three kinds of specification method can reduce the uncertainty of the time series, provide basis for its similarity matching, search and query operation.

Key words: uncertainty time series, query complexity, probability maximum method, mean value method, specification method

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