Search results for "parameter"

showing 10 items of 14056 documents

Competition for long-haul connecting traffic among airports in Europe and the Middle East

2017

Abstract This paper analyzes the competitive position of major hub airports in Europe and the Middle East for long-haul connecting traffic. We apply a connection builder to construct competitive flight connections. A stand out feature of the proposed connection builder is the calibration of the model parameters using booking data, composed of actual passenger demand between a given origin and destination (O&D) market. The methodology is applied to measure competition between hubs using flight schedule data to calculate connectivity measures like the number of city-pairs connected via a hub airport. Our results show that the Middle Eastern hubs have improved their competitive position, while…

050210 logistics & transportationMiddle EastOperations researchbusiness.industry020209 energyStrategy and Management05 social sciencesTransportationModel parametersComputer Science::Social and Information Networks02 engineering and technologyManagement Monitoring Policy and LawCompetition (economics)Network management0502 economics and businessFlight schedule0202 electrical engineering electronic engineering information engineeringPosition (finance)businessTelecommunicationsLawJournal of Air Transport Management
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Probabilistic cross-validation estimators for Gaussian process regression

2018

Gaussian Processes (GPs) are state-of-the-art tools for regression. Inference of GP hyperparameters is typically done by maximizing the marginal log-likelihood (ML). If the data truly follows the GP model, using the ML approach is optimal and computationally efficient. Unfortunately very often this is not case and suboptimal results are obtained in terms of prediction error. Alternative procedures such as cross-validation (CV) schemes are often employed instead, but they usually incur in high computational costs. We propose a probabilistic version of CV (PCV) based on two different model pieces in order to reduce the dependence on a specific model choice. PCV presents the benefits from both…

050502 lawHyperparameterMinimum mean square error05 social sciencesProbabilistic logicEstimator01 natural sciencesCross-validation010104 statistics & probabilitysymbols.namesakeKrigingStatisticssymbolsMaximum a posteriori estimation0101 mathematicsGaussian processAlgorithm0505 lawMathematics2017 25th European Signal Processing Conference (EUSIPCO)
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Mark Baker (2015),Case: Its principles and parameters

2018

060201 languages & linguisticsLinguistics and LanguageCommunication0602 languages and literaturePrinciples and parameters06 humanities and the artsPsychologyMathematical economicsLanguage and LinguisticsStudies in Language
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CCDC 2211279: Experimental Crystal Structure Determination

2023

Related Article: Anssi Peuronen, Anni Taponen, Elina Kalenius, Ari Lehtonen, Manu Lahtinen|2023|Angew.Chem.,Int.Ed.|62|e202215689|doi:10.1002/anie.202215689

11'1''-[(246-trimethylbenzene-135-triyl)tris(methylene)]tris(14-diazabicyclo[2.2.2]octan-1-ium) iodide bis(bis(trifluoromethanesulfonyl)azanide) acetonitrile solvateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 289303: Experimental Crystal Structure Determination

2007

Related Article: K.Laihia, A.Valkonen, E.Kolehmainen, A.Antonov, D.Zhukov, I.Fedosov, V.Nikiforov|2006|J.Mol.Struct.|800|100|doi:10.1016/j.molstruc.2006.03.095

11'22'5'6'7'7a'-octahydro-2-oxo-1'-nitro-2'-(4''-chlorophenyl)-spiro(3H-indole-33'-(3H)-pyrrolizine)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 980177: Experimental Crystal Structure Determination

2014

Related Article: Nejib Dwadnia, Fatima Allouch, Nadine Pirio, Julien Roger, Hélène Cattey, Sophie Fournier, Marie-Josée Penouilh, Charles H. Devillers, Dominique Lucas, Daoud Naoufal, Ridha Ben Salem, and Jean-Cyrille Hierso|2013|Organometallics|32|5784|doi:10.1021/om400317s

11'-(((4-phenyl-n-butyl)amino)dimethyl)ferroceneSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1014200: Experimental Crystal Structure Determination

2014

Related Article: Hai Yi, Markus Albrecht, Arto Valkonen, Kari Rissanen|2015|New J.Chem.|39|746|doi:10.1039/C4NJ01654H

11'-((22'33'55'66'-octafluorobiphenyl-44'-diyl)bis(methylene))bis-4-aza-1-azoniabicyclo[2.2.2]octane dibromideSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1425258: Experimental Crystal Structure Determination

2016

Related Article: T. Mäkelä, K. Rissanen|2016|Dalton Trans.|45|6481|doi:10.1039/C6DT00414H

11'-(2356891112-Octahydro-1471013-benzopentaoxacyclopentadecine-1516-diyl)bis(3-(4-nitrophenyl)urea) NN-dimethylformamide solvateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 2105110: Experimental Crystal Structure Determination

2021

Related Article: Eric Kramer, Shilin Yu, Jas S. Ward, Kari Rissanen|2021|Dalton Trans.|50|14990|doi:10.1039/D1DT03324G

11'-[13-phenylenebis(carbonyloxy-lambda3-iodanediyl)]bis(4-ethyl-1lambda5-pyridine)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1405169: Experimental Crystal Structure Determination

2017

Related Article: Julien Roger, Sylviane Royer, Hélène Cattey, Aleksandr Savateev, Radomyr V. Smaliy, Aleksandr N. Kostyuk, Jean-Cyrille Hierso|2017|Eur.J.Inorg.Chem.||330|doi:10.1002/ejic.201600502

11'-bis(5H-benzo[b]phosphindol-5-yl)-33'-di-t-butylferroceneSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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