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A transformation algorithm for incompatible information systems based on variable precision values
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作者 JiuyingDENG Qinruo WANG +1 位作者 Qiang CHEN Baoyu YE 《控制理论与应用(英文版)》 EI 2012年第1期113-117,共5页
The variable precision rough set (VPRS) model extends the basic rough set (RS) theory with finite uni- verses and finite evaluative measures. VPRS is concerned with the equivalence and the contained relationship b... The variable precision rough set (VPRS) model extends the basic rough set (RS) theory with finite uni- verses and finite evaluative measures. VPRS is concerned with the equivalence and the contained relationship between two sets. In incompatible information systems, the inclusion degree and/3 upper (lower) approximation of the inconsistent equivalence class to the decision equivalence classes may be affected by the variable precision. The analysis of an example of incompatible decision table shows that there is a critical point in fl available-values region. In the new/3 range limited at the critical point, the incompatible decision table can be converted to the coordination decision table reliably. The method and its algorithm implement are introduced for the critical value search. The examples of the inconsistent equivalence class transformation are exhibited. The results illustrate that this algorithm is rational and precise. 展开更多
关键词 Inconsistent equivalence class inclusion degree Incompatible decision table Variable precision
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