Search results for "Thesaurus"

showing 10 items of 57 documents

Graph-based exploration and clustering analysis of semantic spaces

2019

Abstract The goal of this study is to demonstrate how network science and graph theory tools and concepts can be effectively used for exploring and comparing semantic spaces of word embeddings and lexical databases. Specifically, we construct semantic networks based on word2vec representation of words, which is “learnt” from large text corpora (Google news, Amazon reviews), and “human built” word networks derived from the well-known lexical databases: WordNet and Moby Thesaurus. We compare “global” (e.g., degrees, distances, clustering coefficients) and “local” (e.g., most central nodes and community-type dense clusters) characteristics of considered networks. Our observations suggest that …

Text corpusSemantic spacesComputer Networks and CommunicationsComputer sciencegraph theory0211 other engineering and technologiesWordNetNetwork science02 engineering and technologysemanttinen webSemantic networkword2vec similarity networksWord2vec similarity networksClique relaxationscohesive clusters0202 electrical engineering electronic engineering information engineeringWord2vecCluster analysisThesaurus (information retrieval)021103 operations researchMultidisciplinaryInformation retrievalverkkoteorialcsh:T57-57.97Graph theorycliquesGraph theoryclique relaxationsComputational MathematicsCliqueslcsh:Applied mathematics. Quantitative methodssemantic spaces020201 artificial intelligence & image processingCohesive clusters
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Familiar objects and memory color

1998

This research was supported in part by a grant from ADEIT- Universitat de Valencia and IMPIVA to M.D. de F.

Thesaurus (information retrieval)Color visionComputer scienceGeneral Chemical EngineeringComputer graphics (images)Human Factors and ErgonomicsGeneral ChemistryColor Research & Application
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A novel dynamic multi-model relevance feedback procedure for content-based image retrieval

2016

This paper deals with the problem of image retrieval in large databases with a big semantic gap by a relevance feedback procedure. We present a novel algorithm for modelling the users's preferences in the content-based image retrieval system.The proposed algorithm considers the probability of an image belonging to the set of those sought by the user, and estimates the parameters of several local logistic regression models whose inputs are the low-level image features. A Principal Component Analysis method is applied to the original vector to reduce its high dimensionality. The relevance probabilities predicted by these local models are combined by means of a weighted average. These weights …

Thesaurus (information retrieval)Computer scienceCognitive NeuroscienceRelevance feedback020207 software engineering02 engineering and technologycomputer.software_genreContent-based image retrievalComputer Science ApplicationsSet (abstract data type)Search engineArtificial IntelligenceFeature (computer vision)Principal component analysis0202 electrical engineering electronic engineering information engineering020201 artificial intelligence & image processingRelevance (information retrieval)Data miningcomputerImage retrievalSemantic gapNeurocomputing
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Spatial joins

2019

The spatial join is a popular operation in spatial database systems and its evaluation is a well-studied problem. This paper reviews research and recent trends on spatial join evaluation. The complexity of different data types, the consideration of different join predicates, the use of modern commodity hardware, and support for parallel processing open the road to a number of interesting directions for future research, some of which we outline in the paper.

Thesaurus (information retrieval)Computer scienceCommodity hardwareSpatial databaseJoins02 engineering and technologyGeneral MedicineData scienceData typeParallel processing (DSP implementation)020204 information systems0202 electrical engineering electronic engineering information engineeringJoin (sigma algebra)020201 artificial intelligence & image processingSIGSPATIAL Special
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Equivalent Non-Linearization of Hysteretic Systems by Means of RPS

2018

BackgroundThe analysis of elastoplastic systems with hardening (Bouc-Wen systems) under stochastic (seismic) loads needs the evaluation of higher order statistics even in the simplest case of normal distributed input. ObjectiveIn this paper, a non-linearization technique is proposed in order to evaluate the moments of any order of the response. MethodThis technique is developed by means of a nonlinear class of systems whose statistics are a priori known. The parameters of such systems can be chosen in such a way that the two systems are equivalent in a wide sense. Result & ConclusionIn the paper, the strategy to obtain the equivalence and the reliability of the results are discussed.

Thesaurus (information retrieval)Computer scienceSeismic assessment Hysteretic systems Potential systems Moment equations Equivalent non-linearization Stochastic calculus0211 other engineering and technologiesStochastic calculus020101 civil engineering02 engineering and technologyBuilding and Constructionlcsh:TH1-97450201 civil engineeringAlgebraSearch engineSeismic assessmentLinearization021105 building & constructionMoment equationslcsh:Building construction
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Project thesaurus 2020 — Linguistic and ontological aspects

2011

Structures and linguistic concepts of thesauri are analyzed and compared. Proposals for the improvement of thesauri are developed.

Thesaurus (information retrieval)Computer scienceTopic Mapsbusiness.industryAnalogyContext (language use)Pragmaticscomputer.software_genreLinguisticsArtificial intelligenceProject managementbusinesscomputerNatural language processingProceedings of the 6th IEEE International Conference on Intelligent Data Acquisition and Advanced Computing Systems
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Configurational landscape of chiral iron(II) bis(phosphane) complexes

2020

[EN] The reaction of a chiral [FeH(¿2-H2){(R,R)-Me-DuPhos}2]+ ((R,R)-Me-DuPhos = (¿)-1,2-bis[(2R,5R)-2,5-dimethylphospholano]benzene) complex with ethers and halides is investigated by NMR techniques. From this study, it is apparent that dihydrogen ligand exchange by poorly-coordinating donor molecules, such as THF or Et2O, is feasible under mild conditions. The cis-[FeH(THF-d8){(R,R)-Me-DuPhos}2]+ complex is identified as the product in THF-d8 solution. A mixture of cis- and trans-[FeH(ether){(R,R)-Me-DuPhos}2]+ isomers is obtained after the addition of small quantities of THF or Et2O to a CD2Cl2 solution of [FeH(¿2-H2){(R,R)-Me-DuPhos}2]+. The reaction of [FeH(¿2-H2){(R,R)-Me-DuPhos}2]+ w…

Thesaurus (information retrieval)DuPhosHydrideIsomerizationbiologyPhilosophyIronbiology.organism_classificationInorganic Chemistrychemistry.chemical_compoundchemistryDuPhosConfigurationValenciaHumanities
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Numerical models for long-term performance assessment of lightweight insulating assemblies

2019

Abstract This paper presents the results of numerical modelling of hygrothermal processes in test buildings situated in the Botanical garden of the University of Latvia. Long-term performance of wall, floor and ceiling insulating assemblies for five different buildings was simulated using WUFI Pro 6.3. On the experimental side, measurements of temperature and relative humidity at key points of assembles have been accumulated over a period of roughly six years and material samples were taken from building envelope materials for biological analysis. We found that our models rather successfully reproduce the experientially observed temperature and relative humidity dynamics. In the process, we…

Thesaurus (information retrieval)Information retrievalComputer scienceNumerical modelsTerm (time)IOP Conference Series: Materials Science and Engineering
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Functional Polycarbonates from Carbon Dioxide and Tailored Epoxide Monomers: Degradable Materials and Their Application Potential

2018

Thesaurus (information retrieval)Materials scienceEpoxide02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciences0104 chemical sciencesElectronic Optical and Magnetic MaterialsBiomaterialschemistry.chemical_compoundMonomerchemistryCarbon dioxideElectrochemistryOrganic chemistryFunctional polymers0210 nano-technologyAdvanced Functional Materials
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A natural strategy to improve the shelf life of the loaf bread against toxigenic fungi: The employment of fermented whey powder.

2019

Whey powders are used as food ingredients in many applications, from bakery goods, soups and sauces to baby food. The objective of the study was to evaluate the antifungal property of a wheybased medium (WM) fermented by lactic acid bacteria. The antifungal activity of the WM was evaluated using antifungal tests on solid and liquid media. MIC and MFC ranged from 15.6 to 250 mg/ mL and 62.5 to 250 mg/mL, respectively. Using fermented WM for dough preparation produced a reduction of Penicillium expansum growth of 0.5–0.6 log CFU/g and an improvement in shelf life of 1–2 days in relation to control bread.

Thesaurus (information retrieval)Process Chemistry and TechnologyBioengineeringFermentationFood scienceBiologyShelf lifeFood Science
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