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。
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.
出处
《计算机工程》
CAS
CSCD
2012年第21期33-35,共3页
Computer Engineering
基金
国家自然科学基金资助项目(61070032)
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
uncertainty time series
query complexity
probability maximum method
mean value method
specification method
