Results 21 to 30 of about 65,551 (301)
Effective pruning for the discovery of conditional functional dependencies [PDF]
, 2013 Conditional functional dependencies (CFDs) have been proposed as a new type of semantic rules extended from traditional functional dependencies. They have shown great potential for detecting and repairing inconsistent data.
Li, Jiuyong +3 more
core +1 more source
Candidate Code Calculation of Derived Relation Based on Functional Dependencies [PDF]
Jisuanji gongcheng, 2016 Candidate code calculation based on the functional dependencies has important uses in many aspects,such as in the snapshot differential algorithms based on the strategy of compression,in the data consistency inspection,in the data inconsistency repairmen
LI Zhanghai,PAN Jiuhui
doaj +1 more source
Justification for inclusion dependency normal form [PDF]
, 2000 Functional dependencies (FDs) and inclusion dependencies (INDs) are the most fundamental integrity constraints that arise in practice in relational databases.
Vincent, Millist W., Levene, Mark
core +1 more source
Dependent Functional Data [PDF]
ISRN Probability and Statistics, 2012 This paper reviews recent research on dependent functional data. After providing an introduction to functional data analysis, we focus on two types of dependent functional data structures: time series of curves and spatially distributed curves. We review statistical models, inferential methodology, and possible extensions.
openaire +1 more source
Detecting Inconsistencies in Distributed Data [PDF]
, 2010 One of the central problems for data quality is inconsistency detection. Given a database D and a set Sigma of dependencies as data quality rules, we want to identify tuples in D that violate some rules in Sigma.
Ma, Shuai +7 more
core +1 more source
An approach for testing the primeness of attributes in relational schemas [PDF]
Computer Science Journal of Moldova, 2009 In this paper there is proposed a method of partition the attributes of relation scheme in equivalence classes and in nonredundant equivalence classes. Several properties of these equivalence classes are proved. Their properties serve as the basis for an
Cotelea Vitalie
doaj
Why is the snowflake schema a good data warehouse design? [PDF]
, 2003 Database design for data warehouses is based on the notion of the snowflake schema and its important special case, the star schema. The snowflake schema represents a dimensional model which is composed of a central fact table and a set of constituent ...
Mark Levene +3 more
core +1 more source
Bounds for Functions of Dependent Risks [PDF]
Finance and Stochastics, 2006 For an \(n\)-variate real function \(\psi\) and a random vector \(X:=(X_1,\dots,X_n)\) the problem of finding the best possible lower bound on the distribution function of \(\psi(X)\) is studied when the marginal distributions of the individual risks \(X_i\) are given and the structure of dependence of \(X\) is partially or completely unknown.
Paul Embrechts, Giovanni Puccetti 0001
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Arrayed CRISPR/Cas9 Screening for the Functional Validation of Cancer Genetic Dependencies
Bio-Protocol, 2022 CRISPR/Cas9 screening has revolutionized functional genomics in biomedical research and is a widely used approach for the identification of genetic dependencies in cancer cells. Here, we present an efficient and versatile protocol for the cloning of
Ludovica Proietti +4 more
doaj +1 more source
Discovering Graph Functional Dependencies [PDF]
ACM Transactions on Database Systems, 2018 This article studies discovery of Graph Functional Dependencies (GFDs), a class of functional dependencies defined on graphs. We investigate the fixed-parameter tractability of three fundamental problems related to GFD discovery. We show that the implication and satisfiability problems are fixed-parameter tractable, but the validation problem is co-W[1]
Wenfei Fan +3 more
openaire +2 more sources