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001.424
Ouvrages de la bibliothèque en indexation 001.424
Affiner la rechercheWeighting the competitiveness factors for container ports under conflicting interests / G-T. Yeo in Journal of the operational research society (JORS), Vol. 61 N° 8 (Août 2010)
[article]
in Journal of the operational research society (JORS) > Vol. 61 N° 8 (Août 2010) . - pp. 1249–1257
Titre : Weighting the competitiveness factors for container ports under conflicting interests Type de document : texte imprimé Auteurs : G-T. Yeo, Auteur ; D-W. Song, Auteur ; J. Dinwoodie, Auteur Année de publication : 2011 Article en page(s) : pp. 1249–1257 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Container port competitiveness Multiple decision-making group problems Combined AHP procedure Compromise weights Dempster-Shafer theory Index. décimale : 001.424 Résumé : Generally, an evaluation of container port competitiveness is regarded as a multiple criteria decision-making (MCDM) problem which involves various stakeholders with conflicting interests. To solve MCDM problems, the analytic hierarchy process (AHP) method has been popular, but problems arise in managing uncertainty among decision makers, and contradictory opinions. The key issue discussed in this paper is how to obtain compromise weights (CWs) using a combined AHP procedure. This procedure incorporates Dempster-Shafer theory for eliminating uncertainty in the evaluation, and a levelling process for adjusting the contradictory opinions of each group, a so-called multiple decision-making group problem. For an empirical analysis, container ports located in Northeast Asia, known to exhibit severe port competition, were selected. Using an adoption of the methodology, the matrix of CWs was obtained. Using this matrix permits an exact evaluation of competitiveness in the sampled container ports. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n8/abs/jors200988a.html [article] Weighting the competitiveness factors for container ports under conflicting interests [texte imprimé] / G-T. Yeo, Auteur ; D-W. Song, Auteur ; J. Dinwoodie, Auteur . - 2011 . - pp. 1249–1257.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 61 N° 8 (Août 2010) . - pp. 1249–1257
Mots-clés : Container port competitiveness Multiple decision-making group problems Combined AHP procedure Compromise weights Dempster-Shafer theory Index. décimale : 001.424 Résumé : Generally, an evaluation of container port competitiveness is regarded as a multiple criteria decision-making (MCDM) problem which involves various stakeholders with conflicting interests. To solve MCDM problems, the analytic hierarchy process (AHP) method has been popular, but problems arise in managing uncertainty among decision makers, and contradictory opinions. The key issue discussed in this paper is how to obtain compromise weights (CWs) using a combined AHP procedure. This procedure incorporates Dempster-Shafer theory for eliminating uncertainty in the evaluation, and a levelling process for adjusting the contradictory opinions of each group, a so-called multiple decision-making group problem. For an empirical analysis, container ports located in Northeast Asia, known to exhibit severe port competition, were selected. Using an adoption of the methodology, the matrix of CWs was obtained. Using this matrix permits an exact evaluation of competitiveness in the sampled container ports. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n8/abs/jors200988a.html When do armed revolts succeed / M. P. Atkinson in Journal of the operational research society (JORS), Vol. 63 N° 10 (Octobre 2012)
[article]
in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1363–1373
Titre : When do armed revolts succeed : lessons from Lanchester theory Type de document : texte imprimé Auteurs : M. P. Atkinson, Auteur ; A. Gutfraind, Auteur ; M. Kress, Auteur Année de publication : 2012 Article en page(s) : pp. 1363–1373 Note générale : operational research Langues : Anglais (eng) Mots-clés : conflict analysis; defence studies; system dynamics; population; behaviour Index. décimale : 001.424 Résumé : Major revolts have recently erupted in parts of the Middle East with substantial international repercussions. Predicting, coping with and winning those revolts have become a grave problem for many regimes and for world powers. We propose a new model of such revolts that describes their evolution by building on the classic Lanchester theory of combat. The model accounts for the split in the population between those loyal to the regime and those favouring the rebels. We show that, contrary to classical Lanchesterian insights regarding traditional force-on-force engagements, the outcome of a revolt is independent of the initial force sizes; it only depends on the fraction of the population supporting each side and their combat effectiveness. The model's predictions are consistent with the situations currently observed in Afghanistan, Libya and Syria (September 2011), and it points to how those situations might evolve. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011146a.html [article] When do armed revolts succeed : lessons from Lanchester theory [texte imprimé] / M. P. Atkinson, Auteur ; A. Gutfraind, Auteur ; M. Kress, Auteur . - 2012 . - pp. 1363–1373.
operational research
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 63 N° 10 (Octobre 2012) . - pp. 1363–1373
Mots-clés : conflict analysis; defence studies; system dynamics; population; behaviour Index. décimale : 001.424 Résumé : Major revolts have recently erupted in parts of the Middle East with substantial international repercussions. Predicting, coping with and winning those revolts have become a grave problem for many regimes and for world powers. We propose a new model of such revolts that describes their evolution by building on the classic Lanchester theory of combat. The model accounts for the split in the population between those loyal to the regime and those favouring the rebels. We show that, contrary to classical Lanchesterian insights regarding traditional force-on-force engagements, the outcome of a revolt is independent of the initial force sizes; it only depends on the fraction of the population supporting each side and their combat effectiveness. The model's predictions are consistent with the situations currently observed in Afghanistan, Libya and Syria (September 2011), and it points to how those situations might evolve. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n10/abs/jors2011146a.html Why modelling and model use matter / M. Pidd in Journal of the operational research society (JORS), Vol. 61 N° 1 (Issue spécial) (Janvier 2010)
[article]
in Journal of the operational research society (JORS) > Vol. 61 N° 1 (Issue spécial) (Janvier 2010) . - pp. 14–24
Titre : Why modelling and model use matter Type de document : texte imprimé Auteurs : M. Pidd, Auteur Année de publication : 2011 Article en page(s) : pp. 14–24 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Practice of operations research Methodology Decision support systems Index. décimale : 001.424 Résumé : When OR/MS analysts develop a model, how are they intending this model to be used? There are many different ways in which OR/MS models may be classified and one important categorisation is the intended use of the model. Some models are intended for routine use on a frequent basis, with little or no human intervention. Others form part of human decision process and provide support to that process. Considering model validation, data requirements, added value and possible pitfalls leads to a theory of model use based on four categories: decision automation, routine decision support, investigation and improvement, and generating insights for debate. A pilot investigation in an OR/MS group demonstrates that this categorisation could provide the basis for empirical research into a theory of model use in operational research. A theory of model use would be of value to academics, who could prioritise their work, and to practitioners, who could place their own work in a broader landscape. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n1/abs/jors2009141a.html [article] Why modelling and model use matter [texte imprimé] / M. Pidd, Auteur . - 2011 . - pp. 14–24.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 61 N° 1 (Issue spécial) (Janvier 2010) . - pp. 14–24
Mots-clés : Practice of operations research Methodology Decision support systems Index. décimale : 001.424 Résumé : When OR/MS analysts develop a model, how are they intending this model to be used? There are many different ways in which OR/MS models may be classified and one important categorisation is the intended use of the model. Some models are intended for routine use on a frequent basis, with little or no human intervention. Others form part of human decision process and provide support to that process. Considering model validation, data requirements, added value and possible pitfalls leads to a theory of model use based on four categories: decision automation, routine decision support, investigation and improvement, and generating insights for debate. A pilot investigation in an OR/MS group demonstrates that this categorisation could provide the basis for empirical research into a theory of model use in operational research. A theory of model use would be of value to academics, who could prioritise their work, and to practitioners, who could place their own work in a broader landscape. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n1/abs/jors2009141a.html Why the damped trend works / Jr Gardner, E. S. in Journal of the operational research society (JORS), Vol. 62 N° 6 (Juin 2011)
[article]
in Journal of the operational research society (JORS) > Vol. 62 N° 6 (Juin 2011) . - pp. 1177–1180
Titre : Why the damped trend works Type de document : texte imprimé Auteurs : Jr Gardner, E. S., Auteur ; McKenzie, E., Auteur Année de publication : 2011 Article en page(s) : pp. 1177–1180 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Forecasting Time series Exponential smoothing Index. décimale : 001.424 Résumé : The damped trend method of exponential smoothing is a benchmark that has been difficult to beat in empirical studies of forecast accuracy. One explanation for this success is the flexibility of the method, which contains a variety of special cases that are automatically selected during the fitting process. That is, when the method is fitted, the optimal parameters usually define a special case rather than the method itself. For example, in the M3-competition time series, the parameters defined the damped trend method only about 43% of the time using local initial values for the method components. In the remaining series, a special case was selected, ranging from a random walk to a deterministic trend. The most common special case was a new method, simple exponential smoothing with a damped drift term. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n6/abs/jors201037a.html [article] Why the damped trend works [texte imprimé] / Jr Gardner, E. S., Auteur ; McKenzie, E., Auteur . - 2011 . - pp. 1177–1180.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 6 (Juin 2011) . - pp. 1177–1180
Mots-clés : Forecasting Time series Exponential smoothing Index. décimale : 001.424 Résumé : The damped trend method of exponential smoothing is a benchmark that has been difficult to beat in empirical studies of forecast accuracy. One explanation for this success is the flexibility of the method, which contains a variety of special cases that are automatically selected during the fitting process. That is, when the method is fitted, the optimal parameters usually define a special case rather than the method itself. For example, in the M3-competition time series, the parameters defined the damped trend method only about 43% of the time using local initial values for the method components. In the remaining series, a special case was selected, ranging from a random walk to a deterministic trend. The most common special case was a new method, simple exponential smoothing with a damped drift term. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n6/abs/jors201037a.html Wind energy management with battery storage / Zhang, L. in Journal of the operational research society (JORS), Vol. 61 N° 10 (Octobre 2010)
[article]
in Journal of the operational research society (JORS) > Vol. 61 N° 10 (Octobre 2010) . - pp. 1510–1522
Titre : Wind energy management with battery storage Type de document : texte imprimé Auteurs : Zhang, L., Auteur ; A. Wirth, Auteur Année de publication : 2011 Article en page(s) : pp. 1510–1522 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Wind energy Battery storage Online Control Index. décimale : 001.424 Résumé : This article considers short-term energy management of a wind power plant with battery storage, in order to smooth the variations of power output to the external grid. An optimal online heuristic is developed for a control environment, in which decision making is independent of wind historical data and forecasts. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n10/abs/jors200998a.html [article] Wind energy management with battery storage [texte imprimé] / Zhang, L., Auteur ; A. Wirth, Auteur . - 2011 . - pp. 1510–1522.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 61 N° 10 (Octobre 2010) . - pp. 1510–1522
Mots-clés : Wind energy Battery storage Online Control Index. décimale : 001.424 Résumé : This article considers short-term energy management of a wind power plant with battery storage, in order to smooth the variations of power output to the external grid. An optimal online heuristic is developed for a control environment, in which decision making is independent of wind historical data and forecasts. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n10/abs/jors200998a.html Worst-case analysis for flow shop scheduling problems with an exponential learning effect / Wang, J.-B. in Journal of the operational research society (JORS), Vol. 63 N° 1 (Janvier 2012)
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