Journal ArticleManagement Science · December 2025
In this work, we revisit the multi-item order fulfillment model introduced by Jasin and Sinha (2015). Specifically, we study a dynamic setting in which an e-commerce platform (or online retailer) with multiple warehouses and finite inventory faces ...
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Journal ArticleChinese Management Studies · March 27, 2025
PurposeThe purpose of this paper is to examine the impact of deepening digital trade rules on the host country’s position in global value chains (GVCs) of partner countries at ...
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Journal ArticleProduction and Operations Management · February 1, 2024
Self-interested customers’ form of reasoning and its consequences for system performance affect the planning decisions of service providers. We study procedurally rational customers—customers who make decisions based on a sample containing anecdotes of the ...
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Journal ArticleOperations Research · July 1, 2023
Network design problems, such as flexibility design, are ubiquitous in modern marketplaces where firms constantly innovate new ways to match supply and demand. We develop a primal-dual based approach to analyze the flexibility design problem, and establish ...
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Journal ArticlePerformance Evaluation Review · June 19, 2023
We study a discrete-time dynamic multi-way matching model. There are finitely many agent types that arrive stochastically and wait to be matched. State-of-the-art dynamic matching policies in the literature require the knowledge of all system parameters to ...
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ConferenceSigmetrics 2023 Abstract Proceedings of the 2023 ACM Sigmetrics International Conference on Measurement and Modeling of Computer Systems · June 19, 2023
We study a discrete-Time dynamic multi-way matching model. There are finitely many agent types that arrive stochastically and wait to be matched. State-of-The-Art dynamic matching policies in the literature require the knowledge of all system parameters to ...
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Journal ArticleOperations Research · September 1, 2022
We propose a new approach for the vehicle routing problem with stochastic customer demands revealed before vehicles are dispatched. We combine ideas from vehicle routing and manufacturing process flexibility to propose overlapped routing strategies with cu ...
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Journal ArticleManagement Science · February 1, 2019
We study the behavior of strategic customers in an open-routing service network with multiple stations. When a customer enters the network, she is free to choose the sequence of stations that she visits, with the objective of minimizing her expected total ...
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Journal ArticleOperations Research · January 1, 2019
We develop a theory for the design of process flexibility in a multiperiod maketo-order production system. We propose and formalize a notion of "effective chaining" termed the generalized chaining gap (GCG), which can be viewed as a natural extension of cl ...
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Journal ArticleINFORMS Journal on Optimization · January 2019
In this paper, we propose new constraint generation (CG) algorithms for solving the two-stage robust minimum cost flow problem, a problem that arises from various applications such as transportation and logistics. To develop efficient algorithms u ...
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Journal ArticleJournal of the American Chemical Society · September 2018
We study the roles of graphene acting as a buffer layer for growth of an AlN film on a sapphire substrate. Graphene can reduce the density of AlN nuclei but increase the growth rate for an individual nucleus at the initial growth stage. This can lead to th ...
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Journal ArticleProduction and Operations Management · August 1, 2018
We study a hybrid strategy that uses both process flexibility and finished goods inventory for supply chain risk mitigation. The interplay between process flexibility and inventory is modeled as a two-stage robust optimization problem. In the first stage, ...
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Journal ArticleRandom Structures and Algorithms · January 1, 2018
Given a sequence of n independent random variables with common continuous distribution, we propose a simple adaptive online policy that selects a monotone increasing subsequence. We show that the expected number of monotone increasing selections made by su ...
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Journal ArticleOperations Research Letters · May 1, 2016
We develop a distribution-free model to evaluate the performance of process flexibility structures when only the mean and partial expectation of the demand are known. We characterize the worst-case demand distribution under general concave objective functi ...
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Journal ArticleOperations Research · March 1, 2016
Sparse process flexibility and the long chain have become important concepts in design flexible manufacturing systems. In this paper, we study the performance of the long chain in comparison to all designs with at most 2n edges over n supply and n demand n ...
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Journal ArticleProceedings of the National Academy of Sciences of the United States of America · November 2015
Grain refinement can make conventional metals several times stronger, but this comes at dramatic loss of ductility. Here we report a heterogeneous lamella structure in Ti produced by asymmetric rolling and partial recrystallization that can produce an unpr ...
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Journal ArticleInterfaces · September 1, 2015
Firms are exposed to a variety of low-probability, high-impact risks that can disrupt their operations and supply chains. These risks are difficult to predict and quantify; therefore, they are difficult to manage. As a result, managers may suboptimally dep ...
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Journal ArticleAdvanced materials (Deerfield Beach, Fla.) · February 2015
Core-shell nanoparticles (NPs) with lipid shells and varying water content and rigidity but with the same chemical composition, size, and surface properties are assembled using a microfluidic platform. Rigidity can dramatically alter the cellular uptake ef ...
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Journal ArticleOperations Research · January 1, 2015
Theoretical studies of process flexibility designs have mostly focused on expected sales. In this paper, we take a different approach by studying process flexibility designs from the worst-case point of view. To study the worst-case performances, we introd ...
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Journal ArticleNature materials · September 2012
The two-dimensional crystalline structures in graphene challenge the applicability of existing theories that have been used for characterizing its three-dimensional counterparts. It is crucial to establish reliable structure-property relationships in the i ...
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Journal ArticleOperations Research · September 1, 2012
The long chain has been an important concept in the design of flexible processes. This design concept, as well as other sparse designs, have been applied by the automotive and other industries as a way to increase flexibility in order to better match avail ...
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Journal ArticleOperations Research · March 1, 2012
Distributed, iterative algorithms operating with minimal data structure while performing little computation per iteration are popularly known as message passing in the recent literature. Belief propagation (BP), a prototypical message-passing algorithm, ha ...
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Journal ArticleNano letters · April 2011
Modulation of Pd nanoparticle (NP) crystallinity is achieved by switching the surfactants of different binding strengths. Pd NPs synthesized in the presence of weak binding surfactants such as oleylamine possess polyhedral shapes and a polycrystalline natu ...
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Journal ArticleProceedings of the Annual ACM SIAM Symposium on Discrete Algorithms · January 1, 2010
We formulate a Belief Propagation (BP) algorithm in the context of the capacitated minimum-cost network flow problem (MCF). Unlike most of the instances of BP studied in the past, the messages of BP in the context of this problem are piecewise-linear funct ...
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Journal ArticleDiscrete Mathematics · April 6, 2009
We establish a convenient necessary and sufficient condition for a multiaffine real polynomial to be stable, and use it to verify that the half-plane property holds for seven small matroids that resisted the efforts of Choe, Oxley, Sokal, and Wagner [Y.-B. ...
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