دانلود مقاله ISI انگلیسی شماره 78774
عنوان فارسی مقاله

نتایج تمدید در رابطه بین سیستم های اطلاعاتی

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
78774 2015 18 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Extended results on the relationship between information systems
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Information Sciences, Volume 290, 1 January 2015, Pages 156–173

کلمات کلیدی
سیستم اطلاعات؛ تابع همسایگی پیوسته ؛ نقشه برداری رابطه - همسایگی هومومورفيسم؛ کاهش ویژگی
پیش نمایش مقاله
پیش نمایش مقاله نتایج تمدید در رابطه بین سیستم های اطلاعاتی

چکیده انگلیسی

The relationship between information systems is an important topic in rough set field and it is studied through mappings. Many kinds of consistent functions have been proposed and they can be used to describe the invariance of attribute reducts between two information systems efficiently. However they cannot reflect relationships between neighborhoods generated from two information systems. In this paper, to achieve this aim, firstly, we introduce a neighborhood-continuous function that is inspired by the concept of continuous function in topology. Then, we address its properties and discuss relationships between neighborhood-continuous functions and several kinds of existing consistent functions. Furthermore, we investigate some important properties of neighborhood-continuous function with respect to relation mappings. Finally, based on neighborhood-continuous functions, the notion of a neighborhood-homomorphism between different information systems is proposed. It is noted that the reduct feature of a single information system can be described by neighborhood-continuous functions, while the reduct invariance of two different information systems can be described by neighborhood-homomorphisms.

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