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Détail de l'auteur
Auteur Z. Drezner
Documents disponibles écrits par cet auteur
Affiner la rechercheA cover-based competitive location model / Drezner, T. in Journal of the operational research society (JORS), Vol. 62 N° 1 (Janvier 2011)
in Journal of the operational research society (JORS) > Vol. 62 N° 1 (Janvier 2011) . - pp. 100–113
Titre : A cover-based competitive location model Type de document : texte imprimé Auteurs : Drezner, T., Auteur ; Z. Drezner, Auteur ; Kalczynski, P., Auteur Année de publication : 2011 Article en page(s) : pp. 100–113 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Location Competitive Cover Lost demand Index. décimale : 001.424 Résumé : In this paper we propose a new approach to estimating market share captured by competing facilities. The approach is based on cover location models. Each competing facility has a ‘sphere of influence’ determined by its attractiveness level. More attractive facilities have a larger radius of the sphere of influence. The buying power of a customer within the sphere of influence of several facilities is equally divided among the competing facilities. The buying power of a customer within the sphere of influence of no facility is lost. Assuming the presence of competition in the area, the objective is to add a number of new facilities to a chain of existing facilities in such a way that the increase of market share captured by the chain is maximized. The model is formulated and analysed. Optimal and heuristic solution algorithms are designed. Computational experiments demonstrate the effectiveness of the proposed algorithms. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n1/abs/jors2009153a.html [article] A cover-based competitive location model [texte imprimé] / Drezner, T., Auteur ; Z. Drezner, Auteur ; Kalczynski, P., Auteur . - 2011 . - pp. 100–113.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 1 (Janvier 2011) . - pp. 100–113
Mots-clés : Location Competitive Cover Lost demand Index. décimale : 001.424 Résumé : In this paper we propose a new approach to estimating market share captured by competing facilities. The approach is based on cover location models. Each competing facility has a ‘sphere of influence’ determined by its attractiveness level. More attractive facilities have a larger radius of the sphere of influence. The buying power of a customer within the sphere of influence of several facilities is equally divided among the competing facilities. The buying power of a customer within the sphere of influence of no facility is lost. Assuming the presence of competition in the area, the objective is to add a number of new facilities to a chain of existing facilities in such a way that the increase of market share captured by the chain is maximized. The model is formulated and analysed. Optimal and heuristic solution algorithms are designed. Computational experiments demonstrate the effectiveness of the proposed algorithms. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n1/abs/jors2009153a.html
in Journal of the operational research society (JORS) > Vol. 61 N° 5 (Mai 2010) . - pp. 878–881
Titre : Covering continuous demand in the plane Type de document : texte imprimé Auteurs : Z. Drezner, Auteur ; A. Suzuki, Auteur Année de publication : 2010 Article en page(s) : pp. 878–881 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Location Cover Circle packing Index. décimale : 001.424 Résumé : Continuous demand is generated in a convex polygon. A facility located in the area covers demand within a given radius. The objective is to find the locations for p facilities that cover the maximum demand in the area. A procedure that calculates the total area covered by a set of facilities is developed. A multi start heuristic approach for solving this problem is proposed by applying a gradient search from a randomly generated set of p locations for the facilities. Computational experiments for covering a square area illustrate the effectiveness of the proposed algorithm. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n5/abs/jors200910a.html [article] Covering continuous demand in the plane [texte imprimé] / Z. Drezner, Auteur ; A. Suzuki, Auteur . - 2010 . - pp. 878–881.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 61 N° 5 (Mai 2010) . - pp. 878–881
Mots-clés : Location Cover Circle packing Index. décimale : 001.424 Résumé : Continuous demand is generated in a convex polygon. A facility located in the area covers demand within a given radius. The objective is to find the locations for p facilities that cover the maximum demand in the area. A procedure that calculates the total area covered by a set of facilities is developed. A multi start heuristic approach for solving this problem is proposed by applying a gradient search from a randomly generated set of p locations for the facilities. Computational experiments for covering a square area illustrate the effectiveness of the proposed algorithm. DEWEY : 001.424 ISSN : 0361-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n5/abs/jors200910a.html
in Journal of the operational research society (JORS) > Vol. 62 N° 11 (Novembre 2011) . - pp. 2002–2012
Titre : Discrete cooperative covering problems Type de document : texte imprimé Auteurs : O. Berman, Auteur ; Z. Drezner, Auteur ; D. Krass, Auteur Année de publication : 2011 Article en page(s) : pp. 2002–2012 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Cooperative cover Facility location Multiple facilities Index. décimale : 001.424 Résumé : A family of discrete cooperative covering problems is analysed in this paper. Each facility emits a signal that decays by the distance and each demand point observes the total signal emitted by all facilities. A demand point is covered if its cumulative signal exceeds a given threshold. We wish to maximize coverage by selecting locations for p facilities from a given set of potential sites. Two other problems that can be solved by the max-cover approach are the equivalents to set covering and p-centre problems. The problems are formulated, analysed and solved on networks. Optimal and heuristic algorithms are proposed and extensive computational experiments reported. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n11/abs/jors2010176a.html [article] Discrete cooperative covering problems [texte imprimé] / O. Berman, Auteur ; Z. Drezner, Auteur ; D. Krass, Auteur . - 2011 . - pp. 2002–2012.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 62 N° 11 (Novembre 2011) . - pp. 2002–2012
Mots-clés : Cooperative cover Facility location Multiple facilities Index. décimale : 001.424 Résumé : A family of discrete cooperative covering problems is analysed in this paper. Each facility emits a signal that decays by the distance and each demand point observes the total signal emitted by all facilities. A demand point is covered if its cumulative signal exceeds a given threshold. We wish to maximize coverage by selecting locations for p facilities from a given set of potential sites. Two other problems that can be solved by the max-cover approach are the equivalents to set covering and p-centre problems. The problems are formulated, analysed and solved on networks. Optimal and heuristic algorithms are proposed and extensive computational experiments reported. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n11/abs/jors2010176a.html
in Journal of the operational research society (JORS) > Vol. 63 N° 2 (Fevrier 2012) . - pp. 201–206
Titre : Modelling lost demand in competitive facility location Type de document : texte imprimé Auteurs : Drezner, T., Auteur ; Z. Drezner, Auteur Année de publication : 2012 Article en page(s) : pp. 201–206 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Facility location Competitive Lost demand Elastic demand Index. décimale : 001.424 Résumé : In this paper, we propose a simple new approach to model lost demand (also referred to as elastic demand) in competitive facility location. A ‘dummy’ competing facility that attracts the lost demand is added to the list of competing facilities. All competitive facility location models, regardless of their complexity or assumptions, can be modified to include lost demand and be solved by the same algorithms designed for standard models once the dummy facility is added to the data as an additional competitor. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n2/abs/jors201110a.html [article] Modelling lost demand in competitive facility location [texte imprimé] / Drezner, T., Auteur ; Z. Drezner, Auteur . - 2012 . - pp. 201–206.
Recherche opérationnelle
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 63 N° 2 (Fevrier 2012) . - pp. 201–206
Mots-clés : Facility location Competitive Lost demand Elastic demand Index. décimale : 001.424 Résumé : In this paper, we propose a simple new approach to model lost demand (also referred to as elastic demand) in competitive facility location. A ‘dummy’ competing facility that attracts the lost demand is added to the list of competing facilities. All competitive facility location models, regardless of their complexity or assumptions, can be modified to include lost demand and be solved by the same algorithms designed for standard models once the dummy facility is added to the data as an additional competitor. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n2/abs/jors201110a.html
in Journal of the operational research society (JORS) > Vol. 63 N° 11 (Novembre 2012) . - pp. 1578–1588
Titre : Stochastic analysis of ordered median problems Type de document : texte imprimé Auteurs : Z. Drezner, Auteur ; S. Nickel, Auteur ; H.-P. Ziegler, Auteur Année de publication : 2012 Article en page(s) : pp. 1578–1588 Note générale : operational research Langues : Anglais (eng) Mots-clés : location; stochastic models; ordered median; order statistics Index. décimale : 001.424 Résumé : Many location problems can be expressed as ordered median objective. In this paper, we investigate the ordered median objective when the demand points are generated in a circle. We find the mean and variance of the kth distance from the centre of the circle and the correlation matrix between all pairs of ordered distances. By applying these values, we calculate the mean and variance of any ordered median objective and the correlation coefficient between two ordered median objectives. The usefulness of the results is demonstrated by calculating various probabilities such as: What is the probability that the mean distance is greater than the truncated mean distance? What is the probability that the maximum distance is greater than 0.9? What is the probability that the range of distances is greater than 0.8? An analysis of an illustrative example also demonstrates the usefulness of the analysis. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n11/abs/jors20122a.html [article] Stochastic analysis of ordered median problems [texte imprimé] / Z. Drezner, Auteur ; S. Nickel, Auteur ; H.-P. Ziegler, Auteur . - 2012 . - pp. 1578–1588.
operational research
Langues : Anglais (eng)
in Journal of the operational research society (JORS) > Vol. 63 N° 11 (Novembre 2012) . - pp. 1578–1588
Mots-clés : location; stochastic models; ordered median; order statistics Index. décimale : 001.424 Résumé : Many location problems can be expressed as ordered median objective. In this paper, we investigate the ordered median objective when the demand points are generated in a circle. We find the mean and variance of the kth distance from the centre of the circle and the correlation matrix between all pairs of ordered distances. By applying these values, we calculate the mean and variance of any ordered median objective and the correlation coefficient between two ordered median objectives. The usefulness of the results is demonstrated by calculating various probabilities such as: What is the probability that the mean distance is greater than the truncated mean distance? What is the probability that the maximum distance is greater than 0.9? What is the probability that the range of distances is greater than 0.8? An analysis of an illustrative example also demonstrates the usefulness of the analysis. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v63/n11/abs/jors20122a.html
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