Incremental Updating Rough Approximations in Interval-valued Information Systems

  • Yingying Zhang
  • Tianrui Li
  • Chuan Luo
  • Hongmei Chen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9436)


Interval-valued Information System (IvIS) is a generalized model of single-valued information system, in which the attribute values of objects are all interval values instead of single values. The attribute set in IvIS is not static but rather dynamically changing over time with the collection of new information. The rough approximations may evolve accordingly, which should be updated continuously for data analysis based on rough set theory. In this paper, on the basis of the similarity-based rough set theory in IvIS, we first analyze the relationships between the original approximation sets and the updated ones. And then we propose the incremental methods for updating rough approximations when adding and removing attributes, respectively. Finally, a comparative example is used to validate the effectiveness of the proposed incremental methods.


Interval-valued Information System Similarity Rough set Incremental updating Approximations 



This work is supported by the National Science Foundation of China (No. 61175047), NSAF (No. U1230117), the Young Software Innovation Foundation of Sichuan Province, China (No. 2014-046) and the Beijing Key Laboratory of Traffic Data Analysis and Mining (BKLTDAM2014001).


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Authors and Affiliations

  • Yingying Zhang
    • 1
    • 2
  • Tianrui Li
    • 1
    • 2
  • Chuan Luo
    • 1
    • 2
  • Hongmei Chen
    • 1
    • 2
  1. 1.School of Information Science and TechnologySouthwest Jiaotong UniversityChengduChina
  2. 2.Key Lab of Cloud Computing and Intelligent TechniqueChengduChina

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