Download Advances in Fuzzy Object-Oriented Databases: Modeling and by Zongmin Ma PDF

By Zongmin Ma

Accumulating the newest examine effects from the major researchers within the box of fuzzy object-oriented databases, Advances in Fuzzy Object-Oriented Databases: Modeling and functions offer a unmarried resource for present examine and sensible functions in fuzzy object-oriented databases. This publication contains significant points of fuzzy object-oriented database modeling - conceptual, logical and actual, in addition to info of implementations and functions. Readers will make the most of an entire realizing of the notions, ideas, and strategies concerning the examine and advancements of fuzzy object-oriented databases. This e-book can act as a place to begin and a reference for his or her study and advancements and stimulate the curiosity within the box of fuzzy object-oriented databases and extra advertise the learn within the box.

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The set of all existing database schemes is denoted as DS and is defined as the union of the set of all the quadruples that satisfy Definition 14 and the singleton {⊥DS}, with an element that represents an “undefined” database scheme. Every persistent instance o of an object scheme os ∈ D of a database scheme ds has to satisfy all the constraints in C D, with an EPTV that differs from {(F,1)}. An instance of a database scheme ds is called a database and is defined as the set of the extents of all the object schemes of ds.

In Proceedings of the IPMU 2002 conference (Vol. III, pp. 1697– 1703). Annecy, France. , & Vila, M. A. (2003). FoodBi: Managing fuzzy object-oriented data on top of the Java platform. In Proceedings of the 10th IFSA World Congress (pp. 384–387). Istanbul, Turkey. , & Vila, M. A. (2001). Softening the objectoriented database model: Imprecision, uncertainty and fuzzy types. In Proceedings of the IFSA/NAFIPS World Congress (pp. 2323–2328). Vancouver, Canada. Copyright © 2005, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc.

Also, for each attribute of an object, uncertainty about its value was represented by lower-bound and upper-bound probability distribution functions over a set of values. However, the major shortcoming of the POB model is that it does not allow vague and imprecise attribute values. For instance, in the Plant example therein, the values of the attribute sun are chosen to be only enumerated symbols, such as mild, medium, and heavy, without any interpretation. Meanwhile, in practice, those values are inherently vague and imprecise over degrees of sunlight.

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