Deyi Li and Dongbo Liu. A Fuzzy Prolog Database System. John Wiley & Sons, New York, 1990.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....respectively. If o is a fuzzy modifier such as very or more or less , then a new fuzzy set F can be constructed in terms of the modifiers. This set is characterized by the following membership function. gF (X) fo (gF(X) where fo (X) X 2 whe o = very, X when o = more or less. [Li90][Yang94] are other researches to formalize fuzzy reasoning in the logical point of view. The advantage of these approaches is that inference mechanisms well developed in logic programming area can be uniformly applied to the fuzzy reasoning. For example, material in [Li90] is dedicated to the ....

....when o = more or less. Li90] Yang94] are other researches to formalize fuzzy reasoning in the logical point of view. The advantage of these approaches is that inference mechanisms well developed in logic programming area can be uniformly applied to the fuzzy reasoning. For example, material in [Li90] is dedicated to the implementation of the fuzzy reasoning with a popular logic programming language, prolog. 3. Preliminaries 9 This section is provided to help readers understand the basic notations and underlying world assumption that our KDB adopts. 3.1 Conventions and Notation We first ....

D. Li and D. Liu, "A Fuzzy Prolog Database System," Electronic & Electrical Engineering Research Studies, Computer Systems Series, Research Studies Press LTd, 1990.

....with information that is uncertain or imprecise, and the knowledge base and database systems should directly support such applications by providing functionalities to store and to manipulate ill known data. In recent years, various fuzzy data models and fuzzy database systems have been proposed [1, 2, 3, 6, 7, 9, 12, 17, 14, 19]. These models and systems extend relational and object oriented data models Dept. of Math. CS, Univ. of Lethbridge, Lethbridge, AB T1K 3M4, CANADA. zhang cs.uleth.ca. The work of this author is supported in part by an NSERC research grant y Dept. of ISCS, National Univ. of Singapore. ....

D. Li and D. Liu. A Fuzzy Prolog Database System. Research Studies Press, Taunton, England, 1990.

....[3] 5] 7] 13] 15] featured such attempts. The other is to design query evaluation mechanisms as well as operator sets for effectively manipulating the values. It includes [2] 11] 14] 16] On the other hands, in the context of fuzzy databases, expert database languages and the combination of both [6][7] 9] 11] 17] 18] 19] the effective handling of the unknown values has also been widely conceived. To be specific, approaches such as [7] 17] have drastically strengthened the semantic expressiveness of the unknown value by interpreting partial information of subtle meanings in terms of fuzzy ....

D. Li and D. Liu, " A Fuzzy Prolog Database System," Research Studies Press LTD, England, 1990.

.... and fuzzy information existing in the real world, there have been various researches in the last decade attempting to deal with complex objects in the frame of database systems (NF 2 DB models [2, 41, 48, 17] OODB Models [22, 51] in knowledge based systems [3] and in coupled systems [33]. As separate research attempts, there have also been advances dealing with fuzzy information in database systems [9, 23, 33, 54, 52] and in knowledgebased systems [31, 58] and with other uncertain information in both sytems [47, 34] Although there have been some theoretical studies for ....

.... to deal with complex objects in the frame of database systems (NF 2 DB models [2, 41, 48, 17] OODB Models [22, 51] in knowledge based systems [3] and in coupled systems [33] As separate research attempts, there have also been advances dealing with fuzzy information in database systems [9, 23, 33, 54, 52] and in knowledgebased systems [31, 58] and with other uncertain information in both sytems [47, 34] Although there have been some theoretical studies for representing and implementing the complex objects along with their fuzzy attributes in a database model [54] there has not been any serious ....

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D. Li and D. Liu. A Fuzzy Prolog Database System. Research Studies Press Ltd., 1990.

....queries. In [2] there is a study about a SQL extension to make this kind of queries. ffl To build a FRDBMS prototype which implements a concrete fuzzy relational database model. In this sense, some proposals have been made: in [27] Umano shows an implementation for his model and the work [13] is about the implementation of a FRDBMS based in Umano s model using Fuzzy Prolog. For Prade Testemale model, some aspects of its implementation can be found in [11] and in [37] some ideas about the implementation of Zemankova Kandel model are showed. Our particular proposal is inside the first ....

Li D., Liu. "A Fuzzy Prolog Database System". ed. John Wiley & Sons. New York. (1990)

....of 5 a Cartesian product of domains. Each tuple is provided with a grade of membership expressing the extent to which it belongs to the fuzzy relation. Such fuzzy relations made of weighted tuples can be either used as a format for storing information (Kunii, 1976 ; Baldwin and Zhou, 1984 ; Li and Liu, 1990) or only produced when answering flexible queries addressed to a non fuzzy data base (Tahani, 1977 ; Bosc et al. 1988) In this latter case the relation represents a fuzzy concept, e.g. employees who are middle aged and recently engaged ; in such an example the weight attached to a tuple ....

Li D.Y., Liu D.B. (1990) A Fuzzy PROLOG Database System. Research Studies Press Ltd., Taunton, Somerset.

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Deyi Li and Dongbo Liu. A Fuzzy Prolog Database System. John Wiley & Sons, New York, 1990.

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Deyi Li and Dongbo Liu. A Fuzzy Prolog Database System. John Wiley & Sons, New York, 1990.

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Deyi Li and Dongbo Liu. A Fuzzy Prolog Database System. John Wiley & Sons, New York, 1990.

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Li, D., and Liu, D. B., A Fuzzy Prolog Database System, Research Studies Press, Taunton, 1990.

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