QUERYING FUZZY MULTIDIMENSIONAL DATABASES: UNARY OPERATORS AND THEIR PROPERTIES
نویسندگان
چکیده
منابع مشابه
Querying fuzzy summaries of databases: unary operators and their properties
In this paper we propose a general framework to explore and analyse database summaries built from massive data sets. Summaries are multidimensional vague concepts, represented by a set of fuzzy terms provided on each attribute as domain knowledge. We define a logical data model called summary partition, as cubes do in OLAP systems. We then propose a set of unary operators over this data model. ...
متن کاملManipulating Fuzzy Summaries of Databases: Unary Operators and Their Properties
In this paper we propose a general framework to explore and analyse database summaries built from massive data sets. Summaries are multidimensional vague concepts, represented by a set of fuzzy terms provided on each attribute as domain knowledge. We define a logical data model called summary partition, as cubes do in OLAP systems. We then propose a set of unary operators over this data model. ...
متن کاملsome properties of fuzzy hilbert spaces and norm of operators
in this thesis, at first we investigate the bounded inverse theorem on fuzzy normed linear spaces and study the set of all compact operators on these spaces. then we introduce the notions of fuzzy boundedness and investigate a new norm operators and the relationship between continuity and boundedness. and, we show that the space of all fuzzy bounded operators is complete. finally, we define...
15 صفحه اولQuerying Multidimensional Databases
Multidimensional databases are large collections of data, often historical, used for sophisticated analysis oriented to decision making. This activity is supported by an emerging category of software technology, called On-Line Analytical Processing (OLAP). In spite of a lot of commercial tools already available, a fundamental study for OLAP systems is still lacking. In this paper we introduce a...
متن کاملGraphical Querying of Multidimensional Databases
This paper provides an answer-oriented multidimensional analysis environment. The approach is based on a conceptual point of view. We define a conceptual model that represents data through a constellation of facts and dimensions and we present a query algebra handling multidimensional data as well as multidimensional tables. Based on these two propositions, in order to ease the specification of...
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: International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
سال: 2003
ISSN: 0218-4885,1793-6411
DOI: 10.1142/s0218488503002259