| 基于Vague集的不确定方向查询 |
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| 引用本文： | 郝忠孝,吴海燕.基于Vague集的不确定方向查询[J].哈尔滨理工大学学报,2010,15(4):77-80,85. |
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| 作者姓名： | 郝忠孝 吴海燕 |
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| 作者单位： | 1. 哈尔滨理工大学,计算机科学与技术学院,黑龙江,哈尔滨,150080;哈尔滨工业大学,计算机科学与技术学院,黑龙江,哈尔滨,150001
2. 哈尔滨理工大学,计算机科学与技术学院,黑龙江,哈尔滨,150080 |
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| 摘 要： | 针对方向关系界定的不确定性,提出基于Vague集的不确定区域方向关系模型,并利用Vague集方向关系矩阵分析不确定空间对象的方向关系隶属程度.讨论了空间对象与其MBR间的方向谓词映射关系,给出了边界不确定对象之间的方向查询实例及算法.结果表明,用Vague集来表示不确定性区域能够体现出空间对象与方向片相交的最大(最小)程度,比用模糊集更确切,不确定查询更符合人类思维的心理特征.
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| 关 键 词： | 不确定性 方向谓词 空间查询 Vague集 |
Indeterminate Direction Query Based on Vague Set |
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| HAO Zhong-xiao,WU Hai-yan.Indeterminate Direction Query Based on Vague Set[J].Journal of Harbin University of Science and Technology,2010,15(4):77-80,85. |
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| Authors: | HAO Zhong-xiao WU Hai-yan |
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| Affiliation: | 1.School of Computer Science and Technology,Harbin University of Science and Technology,Harbin 150080,China;2.School of Computer Science and Technology,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | The authors discuss the uncertainty in defining direction relationships,and propose the uncertain direction of the relational model of Vague sets.Using the direction of the relationship between Vague sets matrix,we also analyze the uncertainty attached to spatial objects with the direction of the relationship between the degrees.Then the paper discusses the spatial object and its MBR mapping relations between the directions of the predicate,and puts forward the boundary between the uncertain direction of the object instances of queries and algorithms.The results show that using Vague sets to represent the uncertainty region to reflect the intersection of the maximum（minimum） level is more precise than fuzzy sets.Uncertain query is more in line with the psychological characteristics of human mind. |
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| Keywords: | uncertainty direction predicates spatial query Vague set |
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