-
作者：Pajouh, Foad Mahdavi; Balasundaram, Balabhaskar; Hicks, Illya V.
作者单位：University of Massachusetts System; University of Massachusetts Boston; Oklahoma State University System; Oklahoma State University - Stillwater; Rice University
摘要：A k-club is a subset of vertices of a graph that induces a subgraph of diameter at most k, where k is a positive integer. By definition, 1-clubs are cliques and the model is a distance-based relaxation of the clique definition for larger values of k. The k-club model is particularly interesting to study from a polyhedral perspective as the property is not hereditary on induced subgraphs when k is larger than one. This article introduces a new family of facet-defining inequalities for the 2-clu...
-
作者：Pan, Kai; Guan, Yongpei
作者单位：Hong Kong Polytechnic University; State University System of Florida; University of Florida
摘要：With the increasing penetration of renewable energy into the power grid system, the volatility of real-time electricity prices increases significantly. This brings challenges for independent power producers to provide optimal bidding strategies. The traditional approaches of only attending the day-ahead market might not be profitable enough without taking advantage of real-time price volatility. In this paper, we study the optimal bidding strategies for the independent power producers utilizin...
-
作者：Xin, Linwei; Goldberg, David A.
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; University System of Georgia; Georgia Institute of Technology
摘要：Inventory models with lost sales and large lead times have traditionally been considered intractable due to the curse of dimensionality. Recently, Goldberg and coauthors laid the foundations for a new approach to solving these models, by proving that as the lead time grows large, a simple constant-order policy is asymptotically optimal. However, the bounds proven there require the lead time to be very large before the constant-order policy becomes effective, in contrast to the good numerical p...
-
作者：Chen, Nan; Liu, Xin; Yao, David D.
作者单位：Chinese University of Hong Kong; Yangzhou University; Columbia University
摘要：Financial institutions are interconnected directly by holding debt claims against each other (the network channel), and they are also bound by the market when selling assets to raise cash in distressful circumstances (the liquidity channel). The goal of our study is to investigate how these two channels of risk interact to propagate individual defaults to a systemwide catastrophe. We formulate a constrained optimization problem that incorporates both channels of risk, and exploit the problem s...
-
作者：Delasay, Mohammad; Ingolfsson, Armann; Kolfal, Bora
作者单位：Carnegie Mellon University; University of Alberta
摘要：Servers in many real queueing systems do not work at a constant speed. They adapt to the system state by speeding up when the system is highly loaded or slowing down when load has been high for an extended time period. Their speed can also be constrained by other factors, such as geography or a downstream blockage. We develop a state-dependent queueing model in which the service rate depends on the system load and overwork. Overwork refers to a situation where the system has been under a heavy...
-
作者：Wang, Shouqiang; Sun, Peng; de Vericourt, Francis
作者单位：University of Texas System; University of Texas Dallas; Duke University; European School of Management & Technology
摘要：This paper studies the design of voluntary disclosure regulations for a firm that faces a stochastic environmental hazard. The occurrence of such a hazard is known only to the firm. The regulator, if finding a hazard, collects a fine and mandates the firm to perform costly remediation that reduces the environmental damage. The regulator may inspect the firm at any time to uncover the hazard. However, because inspections are costly, the regulator also offers a reward to the firm for voluntarily...
-
作者：Dai, Tinglong; Jerath, Kinshuk
作者单位：Johns Hopkins University; Columbia University
摘要：We study the impact of limited inventory on optimal sales-force compensation contracts. We adopt a principal-agent framework, characterized by limited liability and rent sharing with the agent. A commonly invoked assumption in the inventory management literature is that the demand distribution satisfies the increasing failure rate (IFR) property. Under this assumption, however, past research has established that a quota-bonus contract-a widely adopted sales-force compensation contract in the p...
-
作者：Carlsson, John Gunnar; Behroozi, Mehdi; Devulapalli, Raghuveer; Meng, Xiangfei
作者单位：University of Southern California; Intel Corporation; Intel USA
摘要：One of the fundamental concerns in the analysis of logistical systems is the trade-off between localized, independent provision of goods and services versus provision along a centralized infrastructure such as a backbone network. One phenomenon in which this trade-off has recently been made manifest is the transition of businesses from traditional brick-and-mortar stores to retail sales facilitated via e-commerce, such as grocery delivery services. Conventional wisdom would dictate that such s...
-
作者：Desaulniers, Guy; Errico, Fausto; Irnich, Stefan; Schneider, Michael
作者单位：Universite de Montreal; Polytechnique Montreal; Universite de Montreal; University of Quebec; Ecole de Technologie Superieure - Canada; Universite de Montreal; Universite de Montreal; Johannes Gutenberg University of Mainz; RWTH Aachen University
摘要：Effective route planning for battery electric commercial vehicle (ECV) fleets has to take into account their limited autonomy and the possibility of visiting recharging stations during the course of a route. In this paper, we consider four variants of the electric vehicle-routing problem with time windows: (i) at most a single recharge per route is allowed, and batteries are fully recharged on visit of a recharging station; (ii) multiple recharges per route, full recharges only; (iii) at most ...
-
作者：Gao, Lin; Shou, Biying; Chen, Ying-Ju; Huang, Jianwei
作者单位：Harbin Institute of Technology; City University of Hong Kong; Hong Kong University of Science & Technology; Hong Kong University of Science & Technology; Chinese University of Hong Kong
摘要：Dynamic spectrum access is a new paradigm of secondary spectrum utilization and sharing. It allows unlicensed secondary users (SUs) to exploit the opportunistically underutilized licensed spectrum. Market mechanism is a widely used promising means to regulate the consuming behaviours of users and, hence, achieve the efficient allocation and consumption of limited resources. In this paper, we propose and study a hybrid secondary spectrum market consisting of both the futures market and the spot...
