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An approach to solve division-like queries in fuzzy object databases

机译:一种解决模糊对象数据库中类似类查询的方法

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摘要

The division operator is well known in the context of fuzzy relational databases. Fuzzy approaches to this operator can be found in the literature to solve flexible queries: these approaches try to compute to which extent each element of a candidate set is connected with a given (fuzzy) set of elements. This kind of queries is also interesting in the framework of fuzzy object databases, where the management of complex objects instead of plain tuples causes additional difficulties. The presence of fuzzily described objects in the database makes necessary to use suitable operators that take into account the resemblance that governs the comparison in the underlying reference universe. In this paper, we propose a method to solve this type of queries founded on the use of fuzzy inclusion operators. We study two different alternatives for the way resemblance is considered and we also analyze the role of cardinality in the process.
机译:除法运算符在模糊关系数据库中是众所周知的。可以在文献中找到对该运算符的模糊方法来解决灵活的查询:这些方法尝试计算候选集的每个元素与给定(模糊)元素集的连接程度。在模糊对象数据库的框架中,这种查询也很有趣,其中复杂对象(而不是普通元组)的管理会带来额外的困难。数据库中模糊描述的对象的存在使得有必要使用适当的运算符,这些运算符考虑到控制基础参考环境中比较的相似性。在本文中,我们提出了一种基于使用模糊包含算子来解决此类查询的方法。我们研究了考虑相似性的两种不同方法,并且还分析了基数在此过程中的作用。

著录项

  • 来源
    《Fuzzy sets and systems》 |2012年第2012期|p.47-68|共22页
  • 作者单位

    Department of Computer Science and A. I., University of Granada, 18071 Granada. Spain;

    Department of Informatics, University of Jaen, Campus Las Lagunillasm A3, 21071, Jaen, Spain;

    Department of Computer Science and A. I., University of Granada, 18071 Granada. Spain;

    Department of Computer Science and A. I., University of Granada, 18071 Granada. Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    division; flexible queries; fuzzy object databases; inclusion;

    机译:师;灵活的查询;模糊对象数据库;包含;

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