Fuzzy relations and fuzzy relational databases
نویسندگان
چکیده
منابع مشابه
Fuzzy Join Dependency in Fuzzy Relational Databases
The join dependency provides the basis for obtaining lossless join decomposition in a classical relational schema. The existence of Join dependency shows that that the tables always represent the correct data after being joined. Since the classical relational databases cannot handle imprecise data, they were extended to fuzzy relational databases so that uncertain, ambiguous, imprecise and part...
متن کاملFuzzy Classification on Relational Databases
The fuzzy logic theory proposed by Zadeh (1965) is based on intuitive reasoning and takes into account human subjectivity and imprecision. Unlike statistical data mining techniques such as cluster or regression analysis, fuzzy logic enables the use of nonnumerical values and introduces the notion of linguistic variables (Zadeh, 1975a, 1975b, 1975c). Using linguistic terms and variables hides Ab...
متن کاملFuzzy division in fuzzy relational databases: an approach
An approach to calculate the relational division in fuzzy databases is presented, starting with the GEFRED model. The tuples of the division are obtained with a possibility degree that indicates the extent to which they comply with the relational division requisites. The results obtained are those expected a priori. Furthermore, in order to formalize this method of fuzzy relational division, tw...
متن کاملA Fuzzy Ontology Generation Framework from Fuzzy Relational Databases
Ontology is an important part of the W3C standards for the Semantic Web used to specify standard conceptual vocabularies to exchange data among systems, provide reusable knowledge bases, and facilitate interoperability across multiple heterogeneous systems and databases. However, current ontology is not sufficient for handling vague information that is commonly found in many application domains...
متن کاملQuerying fuzzy relational databases through fuzzy domain calculus
1, 2 a 3 Jose Galindo, * Juan Miguel Medina, M Carmen Aranda ́ Departamento Lenguajes y Ciencias de la Computacion, Universidad de ́ Malaga, E.T.S.I. Informatica 29071 Malaga, Spain ́ ́ ́ Departamento Ciencias de la Computacion e I.A., Universidad de Granada, ́ Av Andalucia no 38, 18071 Granada, Spain Departamento Lenguajes y Ciencias de la Computacion, Universidad de ́ Malaga, E.T.S.I. Informatica 29...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Computers & Mathematics with Applications
سال: 1991
ISSN: 0898-1221
DOI: 10.1016/0898-1221(91)90114-j