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Elaboration on functional dependencies: functional dependencies are dead, long live functional dependencies! [PDF]
ACM SIGPLAN Notices, 2017 Functional dependencies are a popular extension to Haskell's type-class system because they provide fine-grained control over type inference, resolve ambiguities and even enable type-level computations. Unfortunately, several aspects of Haskell's functional dependencies are ill-understood.
Tom Schrijvers
exaly +6 more sources
An Efficient and Scalable Algorithm to Mine Functional Dependencies from Distributed Big Data [PDF]
Sensors, 2022 A crucial step in improving data quality is to discover semantic relationships between data. Functional dependencies are rules that describe semantic relationships between data in relational databases and have been applied to improve data quality ...
Wanqing Wu, Wenyu Mao
doaj +2 more sources
Identifying Causal Effects Under Functional Dependencies [PDF]
EntropyWe study the identification of causal effects, motivated by two improvements to identifiability that can be attained if one knows that some variables in a causal graph are functionally determined by their parents (without needing to know the specific ...
Yizuo Chen, Adnan Darwiche
doaj +2 more sources
Functional Dependencies for Graphs [PDF]
Proceedings of the 2016 International Conference on Management of Data, 2016 We propose a class of functional dependencies for graphs, referred to as GFDs. GFDs capture both attribute-value dependencies and topological structures of entities, and subsume conditional functional dependencies (CFDs) as a special case. We show that the satisfiability and implication problems for GFDs are coNP-complete and NP-complete, respectively,
Wenfei Fan +2 more
openaire +4 more sources
The Shapley Value of Inconsistency Measures for Functional Dependencies [PDF]
Logical Methods in Computer Science, 2022 Quantifying the inconsistency of a database is motivated by various goals including reliability estimation for new datasets and progress indication in data cleaning.
Ester Livshits, Benny Kimelfeld
doaj +1 more source
A Simple Logic of Functional Dependence [PDF]
Journal of Philosophical Logic, 2021 AbstractThis paper presents a simple decidable logic of functional dependence LFD, based on an extension of classical propositional logic with dependence atoms plus dependence quantifiers treated as modalities, within the setting of generalized assignment semantics for first order logic.
Baltag, A., van Benthem, J.
openaire +5 more sources
Research on Increased Data Repair with Confidence Value Token
Jisuanji kexue yu tansuo, 2021 In the era of big data, data contain great value and become important strategic resource in today??s information society. However, a large number of inconsistent data occur during the process of data update and management, which causes unpredictable side
HUANG Hui, LI Hailin
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ABOUT FUNCTIONAL DIAGNOSTICS OF CARS WITH AN ELECTRIC POWER PLANT
International Journal of Advanced Studies, 2023 The article is devoted to the development of a method of functional diagnostics of cars with an electric power plant on stands with running drums. The necessity of carrying out functional diagnostics of cars with an electric power plant is analyzed.
Anton S. Chernyshkov +2 more
doaj +1 more source
Toward an Axiomatization of Strongly Possible Functional Dependencies
Vietnam Journal of Computer Science, 2021 In general, there are two main approaches to handle the missing data values problem in SQL tables. One is to ignore or remove any record with some missing data values.
Munqath Alattar, Attila Sali
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Technology for restoring functional dependencies to determine reliability parameters
Қарағанды университетінің хабаршысы. Математика сериясы, 2021 The problem of determining the properties of the object by analyzing the numerical and qualitative characteristics of a discrete sample is considered.
V.P. Kvasnikov +2 more
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