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In this paper, we propose a temporal extension to an extended ERT model and extend database temporal models to handle the fuzzy numbers. The concept of lifespan for entities and relationships is incorporated in the FTER model. We specify a fuzzy temporal query and update temporal language which is an extension from the TQuel language. The concepts of fuzzy(More)
The aim of this work is to integrate the ideas of flexibility and uncertainty into Allen’s interval-based temporal logic[1], defining a new formalism which extends classical interval Algebra. We refer to fuzzy temporal constraint satisfaction problem, in which constraints are satisfied to a degree, which is based on fuzzy sets. The main objective of this(More)
Many users benefit from decision support systems (DSS), but sometimes they can't readily comprehend the nature or meaning of the outcome from DSS. In general, interpretation of data is much more intuitive if the results from the DSS are translated into charts, maps, and other graphical displays because visualization exploits our natural ability to recognize(More)
A fuzzy temporal database contains fuzzy temporal data. In fuzzy temporal database transactions have deadlines or timing constraints. This situation requires the integration of heterogeneous data in an unique platform in which time representation and management techniques should be considered. In this work, an architecture which makes possible heterogeneous(More)
Recent years have shown a surge in interest in fuzzy/temporal database systems, which allow users to store fuzzy time dependent information. Conventional relational systems are often inefficient for fuzzy temporal query processing because new characteristics are not taken into consideration[1]. Representation and querying of temporal information can benefit(More)
The paper presents a new method for texture feature extraction and description. Gabor wavelet transform, statistical method and fuzzy logic are used together to compute the fuzzy set of main dominant directions of variable scales of medical images of the same kind and the membership degree of dominance of each element in the fuzzy set. Texture feature(More)
This paper present a fuzzy temporal data model for uncertainty/implicit events more precisely, and introduce fuzzy temporal complex event value relations, which combine the concept of fuzzy temporal relations with the idea of fuzzy temporal values in a uniform framework. We elaborate a model theoretic definition of fuzzy temporal information combination(More)
In many applications data values are inherently uncertain. This includes moving-objects, sensors and biological databases here has been recent interest in the development of database management systems that can handle uncertain data. Some proposals for such systems include attribute values that are uncertain. In particular, an attribute value can be modeled(More)