Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Wilbert E. Wilhelm"'
Autor:
Sangdo Choi, Wilbert E. Wilhelm
Publikováno v:
Computers & Operations Research. 117:104901
This paper investigates an appointment system with deterministic arrival times and non-identical exponential service times with the objective of minimizing the expected costs of customer-waiting and server-idle times (WIT). For two customers, this pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3186d3d8793da64d0275a3a14a6e12fe
https://doi.org/10.1016/j.cor.2020.104901
https://doi.org/10.1016/j.cor.2020.104901
Autor:
Wilbert E. Wilhelm, Elif Ilke Gokce
Publikováno v:
Discrete Optimization. 17:25-54
This paper presents a study of the polytope defined by the minimizing form of the binary knapsack inequality, which is a greater-than-or-equal-to constraint, augmented by disjoint generalized upper bound constraints. A set of valid inequalities, call
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9855c43e104d6523e247485ff6904af5
https://doi.org/10.1016/j.disopt.2015.03.003
https://doi.org/10.1016/j.disopt.2015.03.003
Autor:
Sangdo Choi, Wilbert E. Wilhelm
Publikováno v:
European Journal of Operational Research. 235:138-148
We provide an approach to optimize a block surgical schedule (BSS) that adheres to the block scheduling policy, using a new type of newsvendor-based model. We assume that strategic decisions assign a specialty to each Operating Room (OR) day and deal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0efbda26281f61eaf486f6801dbae1c7
https://doi.org/10.1016/j.ejor.2013.10.040
https://doi.org/10.1016/j.ejor.2013.10.040
Autor:
Wilbert E. Wilhelm, Suhwan Kim
Publikováno v:
IEEE Transactions on Automation Science and Engineering. 11:421-428
The military uses direction finders to locate enemy forces by detecting the positions of transmitters that emit radio frequencies. This paper studies the deployment of direction finders with the objective of maximizing the effectiveness with which tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2757683d8490d937e61c6cf76b889fc6
https://doi.org/10.1109/tase.2013.2259481
https://doi.org/10.1109/tase.2013.2259481
Autor:
Wilbert E. Wilhelm, Sangdo Choi
Publikováno v:
Computers & Operations Research. 44:174-184
This paper studies capacity planning decisions that allocate surgical specialties to operating-room (OR) days with the objective of minimizing total expected costs due to penalties for any patients who are not accommodated and for under- (i.e., idlen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a69a877b6f5222b578af4917f22ef4ef
https://doi.org/10.1016/j.cor.2013.11.007
https://doi.org/10.1016/j.cor.2013.11.007
Publikováno v:
Computers & Operations Research. 40:2340-2356
The strategic dynamic supply chain reconfiguration (DSCR) problem is to prescribe the location and capacity of each facility, select links used for transportation, and plan material flows through the supply chain, including production, inventory, bac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c7844ecf350ad34cf6185d45907075c
https://doi.org/10.1016/j.cor.2013.04.011
https://doi.org/10.1016/j.cor.2013.04.011
Publikováno v:
Military Operations Research. 18:15-32
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::493ed685a9a00daaa2f18f7158ea49f5
https://doi.org/10.5711/1082598318215
https://doi.org/10.5711/1082598318215
Autor:
Wilbert E. Wilhelm, Xiaoyan Zhu
Publikováno v:
Computers & Operations Research. 40:385-394
The resource-constrained shortest-path problem (RCSP) is often used as a sub-problem in branch-and-price because it can model the complex logic by which many actual systems operate. This paper addresses two special issues that arise in such an applic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b84a9172108fdcf43d1660533a3e70a
https://doi.org/10.1016/j.cor.2012.07.007
https://doi.org/10.1016/j.cor.2012.07.007
Autor:
Dong Liang, Wilbert E. Wilhelm
Publikováno v:
Naval Research Logistics (NRL). 60:1-18
This article proposes two dual-ascent algorithms and uses each in combination with a primal drop heuristic embedded within a branch and bound framework to solve the uncapacitated production assembly distribution system (i.e., supply chain) design pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e06a8b2d8f5f87d288c1f54cdb12d22e
https://doi.org/10.1002/nav.21515
https://doi.org/10.1002/nav.21515
Autor:
Wilbert E. Wilhelm, Sangdo Choi
Publikováno v:
IIE Transactions on Healthcare Systems Engineering. 2:156-171
The smallest-variance-first-rule (SV) is generally accepted as the optimal policy for sequencing two surgeries, although it has been proven formally only for several restricted cases. We extend prior work, studying three distributions as models of su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02b28b7b68a7e1012dcd224bda7ca57d
https://doi.org/10.1080/19488300.2012.684272
https://doi.org/10.1080/19488300.2012.684272