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作者：Epstein, Rafael; Goic, Marcel; Weintraub, Andres; Catalan, Jaime; Santibanez, Pablo; Urrutia, Rodolfo; Cancino, Raul; Gaete, Sergio; Aguayo, Augusto; Caro, Felipe
作者单位：Universidad de Chile; University of California System; University of California Los Angeles
摘要：We present a methodology for long-term mine planning based on a general capacitated multicommodity network flow formulation. It considers underground and open-pit ore deposits sharing multiple downstream processing plants over a long horizon. The purpose of the model is to optimize several mines in an integrated fashion, but real size instances are hard to solve due to the combinatorial nature of the problem. We tackle this by solving the relaxation of a tight linear formulation, and we round ...
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作者：Bassamboo, Achal; Randhawa, Ramandeep S.; Van Mieghem, Jan A.
作者单位：Northwestern University; University of Southern California
摘要：We analytically study optimal capacity and flexible technology selection in parallel queuing systems. We consider N stochastic arrival streams that may wait in N queues before being processed by one of many resources (technologies) that differ in their flexibility. A resource's ability to process k different arrival types or classes is referred to as level-k flexibility. We determine the capacity portfolio (consisting of all resources at all levels of flexibility) that minimizes linear capacit...
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作者：Saghafian, Soroush; Hopp, Wallace J.; Van Oyen, Mark P.; Desmond, Jeffrey S.; Kronick, Steven L.
作者单位：Arizona State University; Arizona State University-Tempe; University of Michigan System; University of Michigan; University of Michigan System; University of Michigan; University of Michigan System; University of Michigan; University of Michigan System; University of Michigan
摘要：Crisis-level overcrowding conditions in emergency departments (EDs) have led hospitals to seek out new patient-flow designs to improve both responsiveness and safety. One approach that has attracted attention and experimentation in the emergency medicine community is a system in which ED beds and care teams are segregated and patients are streamed based on predictions of whether they will be discharged or admitted to the hospital. In this paper, we use a combination of analytic and simulation ...
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作者：Canbolat, Pelin G.; Golany, Boaz; Mund, Inbal; Rothblum, Uriel G.
作者单位：Technion Israel Institute of Technology; Technion Israel Institute of Technology
摘要：The paper considers a race among multiple firms that compete over the development of a product. The first firm to complete the development gains a reward, whereas the other firms gain nothing. Each firm decides how much to invest in developing the product, and the time it completes the development is a random variable that depends on the investment level. The paper provides a method for explicitly computing a unique Nash equilibrium, parametrically in the interest rate; for a given interest ra...
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作者：Kouvelis, Panos; Zhao, Wenhui
作者单位：Washington University (WUSTL); Shanghai Jiao Tong University
摘要：We consider a supply chain with a retailer and a supplier: A newsvendor-like retailer has a single opportunity to order a product from a supplier to satisfy future uncertain demand. Both the retailer and supplier are capital constrained and in need of short-term financing. In the presence of bankruptcy risks for both the retailer and supplier, we model their strategic interaction as a Stackelberg game with the supplier as the leader. We use the supplier early payment discount scheme as a decis...
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作者：Iravani, Foad; Dasu, Sriram; Ahmadi, Reza
作者单位：University of Washington; University of Washington Seattle; University of Southern California; University of California System; University of California Los Angeles
摘要：Every year, companies that produce commercial tax preparation software struggle with thousands of state and federal changes to tax laws and forms. Three competitors dominate the market with its short selling season, and release delays slash profits. Tax authorities issue updates August December, and all changes must be processed and incorporated before year end. Systematic resource allocation and process manageinent are crucial yet problematic due to the volume and complexity of changes, brief...
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作者：Kalkanci, Basak; Erhun, Feryal
作者单位：Massachusetts Institute of Technology (MIT); Stanford University
摘要：This paper analyzes decentralized assembly systems under asymmetric demand information and sequential contracting. We reveal new insights on the value of contract type (price-only versus complex), demand information (complete versus asymmetric), and contract sequence (first mover versus second mover) to different players. Our results for the basic model show the following: (1) Complex contracts increase the suppliers' aggregate profit; however, individual suppliers do not necessarily benefit f...
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作者：Fischetti, Matteo; Monaci, Michele; Salvagnin, Domenico
作者单位：University of Padua
摘要：We address the exact solution of the famous esc instances of the quadratic assignment problem. These are extremely hard instances that remained unsolved-even allowing for a tremendous computing power-by using all previous techniques from the literature. During this challenging task we found that three ideas were particularly useful and qualified as a breakthrough for our approach. The present paper is about describing these ideas and their impact in solving esc instances. Our method was able t...
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作者：Fang, Ya Ping; Meng, Kaiwen; Yang, Xiao Qi
作者单位：Sichuan University; Southwest Jiaotong University; Hong Kong Polytechnic University
摘要：In this paper we study piecewise linear multicriteria programs, that is, multicriteria programs with either a continuous or discontinuous piecewise linear objective function and a polyhedron set constraint. We obtain an algebraic representation of a semi-closed polyhedron and apply it to show that the image of a semi-closed polyhedron under a continuous linear function is always one semi-closed polyhedron. We establish that the (weak) Pareto solution/point set of a piecewise linear multicriter...
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作者：Zenios, Stefanos
作者单位：Stanford University
