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 "INTEGERS"
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An evaluation of several combinations of routing and storage location assignment policies for the order batching problem.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Oct2022, Vol. 60 Issue 19, p5892-5911. 20p. 3 Diagrams, 9 Charts, 4 Graphs.

Abstract: In this work, we address the Order Batching Problem (OBP) and we devise tailor-made Mixed Integer Linear Programming (MILP) formulations of the OBP considering composite, largest gap and optimum routing policies, for the first time. We also introduce a...

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A Joint Assembly Line Balancing and Feeding Problem (JALBFP) considering direct and indirect supply strategies.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Oct2022, Vol. 60 Issue 19, p5727-5745. 19p. 3 Diagrams, 7 Charts, 1 Graph.

Abstract: In an assembly system, balancing the line and designing the part feeding setting play a fundamental role in guaranteeing efficiency and effectiveness. Although these two aspects are interrelated, they are usually performed subsequent to each other, wit...

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Performance analysis and optimisation of stochastic flow lines with limited material supply.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Sep2022, Vol. 60 Issue 17, p5293-5306. 14p. 1 Diagram, 4 Charts, 7 Graphs.

Abstract: We consider stochastic flow lines with limited buffer sizes and limited material supply. In these systems, the configuration of the flow line parameters and the configuration of the material supply determine the system output. Shortages of material sup...

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Order processing task allocation and scheduling for E-order fulfilment.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Jul2022, Vol. 60 Issue 13, p4253-4267. 15p. 1 Diagram, 9 Charts, 2 Graphs.

Abstract: This paper mainly studies a task allocation and scheduling problem in the multi-thread fulfilment process of electronic order, which seeks to minimise the makespan under thread constraints and order precedence constraints. The problem is formulated as ...

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Sequencing mixed-model assembly lines with risk-averse stochastic mixed-integer programming.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Jun2022, Vol. 60 Issue 12, p3774-3791. 18p. 2 Diagrams, 5 Charts, 2 Graphs.

Abstract: Sequencing decisions in mixed-model assembly lines are complicated by various uncertainty factors. This paper addresses a real-life uncertainty factor identified in a manufacturer of large vehicles, by modelling unreliable part delivery and quality. St...

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Reverse supply network design for circular economy pathways of wind turbine blades in Europe.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Mar2022, Vol. 60 Issue 6, p1795-1814. 20p. 1 Diagram, 4 Charts, 4 Graphs, 5 Maps.

Abstract: Wind energy installations are increasing rapidly and so is their end-of-life waste. Wind turbine blades consist primarily of glass fibers and are usually landfilled. Given the significant amounts of blade waste expected in the future, circular economy ...

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Scheduling trucks and storage operations in a multiple-door cross-docking terminal considering multiple storage zones.

Publication Type: Academic Journal

Source(s): International Journal of Production Research. Feb2022, Vol. 60 Issue 4, p1153-1177. 25p. 7 Diagrams, 9 Charts, 4 Graphs.

Abstract: Cross-docking is a logistics process in which products are unloaded through receiving docks and then transferred to shipping docks with almost no storage in between. In this paper, a mixed integer linear programming model (MILP) is proposed to optimise...

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Optimal Bounds for the k-cut Problem.

Publication Type: Academic Journal

Source(s): Journal of the ACM. Jan2022, Vol. 69 Issue 1, p1-18. 18p.

Abstract: In the k-cut problem, we want to find the lowest-weight set of edges whose deletion breaks a given (multi)graph into k connected components. Algorithms of Karger and Stein can solve this in roughly O(n2k) time. However, lower bounds from conjectures ab...

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On the Rejection Rate of Exact Sampling Algorithm for Discrete Gaussian Distributions over the Integers.

Publication Type: Academic Journal

Source(s): Theory of Computing Systems. Dec2022, Vol. 66 Issue 6, p1099-1122. 24p.

Authors:

Abstract: A discrete Gaussian distribution over the integers is a Gaussian distribution restricted so that its support is the set of all the integers. This paper studies the problem of sampling exactly from discrete Gaussian distributions over the integers. It i...

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Special Issue: Global Solution of Integer, Stochastic and Nonconvex Optimization Problems.

Publication Type: Academic Journal

Source(s): Mathematical Programming. Nov2022, Vol. 196 Issue 1/2, p1-8. 8p.

Abstract: More recently, Ahmed and co-authors invented the stochastic dual dynamic integer programming (SDDIP) algorithm [[82]], which extends the stochastic dual dynamic programming algorithm, a leading algorithm for solving multi-stage stochastic I linear i pr...

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