Results 281 to 290 of about 5,936,360 (329)

Entropy Bounds for Conjunctive Queries with Functional Dependencies

International Conference on Database Theory, 2015
We study the problem of finding the worst-case bound for the size of the result $Q(\mathbb{ D})$ of a fixed conjunctive query $Q$ applied to a database $\mathbb{ D}$ satisfying given functional dependencies.
Tomasz Gogacz, Szymon Toruńczyk
semanticscholar   +1 more source

Dependability and Functional Safety

2012
The chapter deals with the dependability and the functional safety of a system by illustrating the key points of the theoretical corpuses formulated on the two subjects: the dependability theory and the functional safety standards. Dependability is concerned with the ability of a system to deliver the intended service, including the ability to cope ...
BUJA, GIUSEPPE, MENIS, ROBERTO
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Copula Functions for Residual Dependency

Psychometrika, 2007
Most item response theory models are not robust to violations of conditional independence. However, several modeling approaches (e.g., conditioning on other responses, additional random effects) exist that try to incorporate local item dependencies, but they have some drawbacks such as the nonreproducibility of marginal probabilities and resulting ...
Braeken, Johan, Tuerlinckx, Francis, De Boeck, Paul   +2 more
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Path-dependent functions

Theoretical and Mathematical Physics, 1985
A general description of various path-dependent functions is given by using series expansions of Taylor type. Path-integrals and path-tensors are defined as many-components quantities whose values contain complete information on the path. These quantities are considered as elementary path-dependent functions and are used instead of power monomials in ...
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Imprecise Functional Dependencies

2009
Functional dependencies represent a fundamental concept in the design of a database since they are capable of capturing some semantics of the data strongly connected with the occurrence of redundancy in a database. The development of applications working on fuzzy and multimedia databases has required the extension of the functional dependency notion to
DEUFEMIA, Vincenzo, POLESE, Giuseppe, M. VACCA   +2 more
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Dependencies in fuzzy databases: functional dependency

Proceedings of 1995 IEEE International Conference on Fuzzy Systems. The International Joint Conference of the Fourth IEEE International Conference on Fuzzy Systems and The Second International Fuzzy Engineering Symposium, 2002
Classical and fuzzy functional dependencies, which consist of an important class of constraints, are examined in fuzzy relational databases. The truth value of a proposition expressing a functional dependency is not a binary value even for a classical functional dependency in fuzzy relational databases.
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Neuropsychological functioning and alcohol dependence

Current Opinion in Psychiatry, 2005
Alcohol dependence is a significant challenge to society and health-care services. The associated cognitive deficits are thought to affect behavioral control, therapy and liability to relapse. The present review demonstrates important new findings.Recent interest focused on compensatory functional circuits, components of executive functioning ...
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Mining relaxed functional dependencies from data

Data mining and knowledge discovery, 2019
Loredana Caruccio, V. Deufemia, G. Polese   +2 more
semanticscholar   +1 more source

A novel multi-lead ECG personal recognition based on signals functional and structural dependencies using time-frequency representation and evolutionary morphological CNN

Biomedical Signal Processing and Control, 2021
Majid Sepahvand, Fardin Abdali-Mohammadi
exaly  

Functional Dependency and Other Related Dependencies

2005
The invention and rise of the relational database starting in the 1960s was accompanied by the remarkable development of canonical design techniques, making it possible to avoid many database designs with unintended bad consequences (Codd, 1970, 1971). These techniques, called “normal forms,” prevent the occurrence of what are called “anomalies.” If a ...
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