Abstract
With the rapid development of information technology, numerous mixed data are collected, which often leads to incomplete data due to human and nonhuman factors. The data in an actual information system often evolve dynamically with time. The modification of data values and the addition and deletion of objects are common dynamic variations in data sets, which usually occur simultaneously. With dynamic changes of data, static methods of knowledge acquisition require recalculated from scratch, resulting in repeated calculations and greater time consumption. Aiming to address the above multi-dimensional dynamic variations in data values and object sets under mixed incomplete data, this paper studies strategies and methods of dynamically updating three-way regions (viz. positive, negative and boundary regions) based on a matrix. First, for a hybrid incomplete decision system (HIDS), we develop a hybrid normalized distance metric for objects and present a matrix-based method of calculating positive, boundary and negative regions. For cases of modifying attribute values and adding and deleting object sets concurrently, the incremental mechanisms of the maintenance of three-way regions are researched for the multi-dimensional dynamic variations of HIDS; meanwhile, we develop a matrix-based incremental algorithm to update three-way regions. A series of experiments implemented on nine UCI data sets demonstrate that the proposed dynamic algorithm is superior to the static algorithm for handling the multi-dimensional dynamic variations of the HIDS.
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19 July 2022
A Correction to this paper has been published: https://doi.org/10.1007/s10489-022-03906-5
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Acknowledgments
Research on this work is partially supported by the National Science Foundation of China (No. 62076002), by the Natural Science Foundation of Anhui Province (Nos. 2108085MF215 and 2008085MF224), by the Higher Education Natural Science Foundation of Anhui Province (No. KJ2020ZD63), and by the Key Laboratory of Computation Intelligence and Signal Processing of Education Ministry Foundation.
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The original online version of this article was revised: Contains three mistakes due to the transformation document being edited through different formulas. The presentation of Definition 5, Theorem 3 and Table 3 were incorrect.
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Yang, C., Ge, H. & Xu, Y. Incremental maintenance of three-way regions with variations of objects and values in hybrid incomplete decision systems. Appl Intell 53, 3713–3735 (2023). https://doi.org/10.1007/s10489-022-03736-5
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DOI: https://doi.org/10.1007/s10489-022-03736-5