Results 241 to 250 of about 273,540 (290)
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TIME-DEPENDENT DENSITY FUNCTIONAL THEORY
Annual Review of Physical Chemistry, 2003▪ Abstract Time-dependent density functional theory (TDDFT) can be viewed as an exact reformulation of time-dependent quantum mechanics, where the fundamental variable is no longer the many-body wave function but the density. This time-dependent density is determined by solving an auxiliary set of noninteracting Schrödinger equations, the Kohn-Sham ...
M A L, Marques, E K U, Gross
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Dependence Functions and Frailties
Biometrical Journal, 1996AbstractThis note considers association between nonnegative random variables in which the two observed survival times depend on an unobservable random variable via the proportional hazard model. When the random variables are subject to censoring, the conditional hazard functions provides a reasonable means of describing the association between the two ...
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Functional dependency discovery
Proceedings of the VLDB Endowment, 2015Functional dependencies are important metadata used for schema normalization, data cleansing and many other tasks. The efficient discovery of functional dependencies in tables is a well-known challenge in database research and has seen several approaches.
Thorsten Papenbrock +7 more
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Functional Dependencies between Variables
Studia Logica, 2000zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Metric Functional Dependencies
2009 IEEE 25th International Conference on Data Engineering, 2009When merging data from various sources, it is often the case that small variations in data format and interpretation cause traditional functional dependencies (FDs) to be violated, without there being an intrinsic violation of semantics. Examples include differing address formats, or different reported latitude/longitudes for a given address.
Nick Koudas +3 more
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Pathological dependency: Distinguishing functional from emotional dependency.
Clinical Psychology: Science and Practice, 2005Ng and Bornstein (this issue) conclude from their meta-analysis that the DSM assertion that dependent personality disorder (DPD) shows significant comorbidity with anxiety disorders (ADs) appears to be overstated. In this comment it is argued that the DSM assertion may be not overstated.
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Dependability and Functional Safety
2012The 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, 2007Most 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 +2 more
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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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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
2009Functional 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 +2 more
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