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In this paper, based on the possibility distribution and semantic measure of fuzzy data, an extended object-oriented database model to handle imperfect as well as complex object in the real-world is introduced. Some major notions in object-oriented databases such as objects, classes, object-classes, relationships, subclass/superclass and multiple(More)
We propose an flexible extension of SPARQL by introducing fuzzy set theory and the α-cut operation of fuzzy numbers into SPARQL. We show how to efficiently compute the top-k answers of flexible SPARQL queries with regard to membership degrees and user-defined weights. Based on our method, a flexible query service is implemented and evaluated on the LUBM(More)
Contour-based shape feature extraction is one of the important research contents in content-based medical image retrieval. The paper presents a method using Fourier descriptors with brightness. The method uses centroid distance function to compute shape signature from boundary pixels of a shape. Fourier transform is used for shape signature to compute(More)
Fuzzy set theory has been extensively applied to extend various database models and resulted in numerous contributions, mainly with respect to the popular relational model or to some related form of it. To satisfy the need of modeling complex objects with imprecision and uncertainty, recently many researches have been concentrated on fuzzy semantic(More)
Fuzzy set theory has been extensively applied to extend various database models and resulted in numerous contributions, mainly with respect to the popular relational model or to some related form of it. To satisfy the need of modeling complex objects with imprecision and uncertainty, recently many researches have been concentrated on fuzzy object-oriented(More)
In any <i>k</i>-in-a-row game, the player should always analyze each consecutive sequence in 4 directions, which consists of either the void intersections or the intersections occupied by the same color stones. Although the difficult problem in <i>k</i>-in-a-row game is that any void intersection on board can be placed a stone on, just like Go, however, the(More)