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Skyline refinement exploiting fuzzy formal concept analysis

International Journal of Intelligent Computing and Cybernetics 2021年第3期14卷 333-362页

作者： Mohamed Haddache allel hadjali Hamid Azzoune DIF-FS University M’Hamed Bougara of BoumerdesBoumerdesAlgeria LIAS ENSMA Futuroscope ChasseneuilCedexFranceand LRIA USTHBAlgiersAlgeria

Purpose-The study of the skyline queries has received considerable attention from several database researchers since the end of 2000’*** queries are an appropriate tool that can help users to make intelligent decisions in the presence of multidimensional data when different,and often contradictory criteria are to be taken into *** on the concept of Pareto dominance,the skyline process extracts the most interesting(not dominated in the sense of Pareto)objects from a set of *** computation methods often lead to a set with a large size which is less informative for the end users and not easy to be *** purpose of this paper is to tackle this problem,known as the large size skyline problem,and propose a solution to deal with it by applying an appropriate refining ***/methodology/approach-The problem of the skyline refinement is formalized in the fuzzy formal concept analysis ***,an ideal fuzzy formal concept is computed in the sense of some particular defined *** leveraging the elements of this ideal concept,one can reduce the size of the computed ***-An appropriate and rational solution is discussed for the problem of ***,a tool,named SkyRef,is *** experiments are done using this tool on both synthetic and real *** limitations/implications-The authors have conducted experiments on synthetic and some real datasets to show the effectiveness of the proposed ***,thorough experiments on large-scale real datasets are highly desirable to show the behavior of the tool with respect to the performance and time execution *** implications-The tool developed SkyRef can have many domains applications that require decision-making,personalized recommendation and where the size of skyline has to be *** particular,SkyRef can be used in several real-world applications such as economic,security,medicine and *** implications-This wor

关键词： Skyline queries Pareto dominance Fuzzy formal concept analysis Skyline refinement

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Fuzz-TIME: an intelligent system for managing fuzzy temporal information

引用

International Journal of Intelligent Computing and Cybernetics 2017年第2期10卷 200-222页

作者： Aymen Gammoudi allel hadjali Boutheina Ben Yaghlane Institut Superieur De Gestion De Tunis LARODECTunisTunisia Laboratoire d’Informatique et d’Automatique pour les Systèmes École nationale supérieure de mécanique et d’aérotechniqueChasseneuil-du-PoitouFrance IHECT University of CarthageTunisTunisia

Purpose-Time modeling is a crucial feature in many application ***,temporal information often is not crisp,but is subjective and *** purpose of this paper is to address the issue related to the modeling and handling of imperfection inherent to both temporal relations and ***/methodology/approach-On the one hand,fuzzy extensions of Allen temporal relations are investigated and,on the other hand,extended temporal relations to define the positions of two fuzzy time intervals are ***,a database system,called Fuzzy Temporal Information Management and Exploitation(Fuzz-TIME),is developed for the purpose of processing fuzzy temporal ***-To evaluate the proposal,the authors have implemented a Fuzz-TIME system and created a fuzzy historical database for the querying *** demonstrative scenarios from history domain are proposed and *** limitations/implications-The authors have conducted some experiments on archaeological data to show the effectiveness of the Fuzz-TIME ***,thorough experiments on large-scale databases are highly desirable to show the behavior of the tool with respect to the performance and time execution *** implications-The tool developed(Fuzz-TIME)can have many practical applications where time information has to be dealt *** particular,in several real-world applications like history,medicine,criminal and financial domains,where time is often perceived or expressed in an imprecise/fuzzy *** implications-The social implications of this work can be expected,more particularly,in two domains:in the museum to manage,exploit and analysis the piece of information related to archives and historic data;and in the hospitals/medical organizations to deal with time information inherent to data about patients and ***/value-This paper presents the design and characterization of a novel and intelligent database system to process and manage

关键词： Information retrieval Fuzzy set theory Fuzzy temporal relations Fuzzy time intervals Temporal databases

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