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Dissertations / Theses on the topic 'Multi-commodity flows'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ghalebsaz-Jeddi, Babak. "Analysis and sensitivity of stochastic capacitatied multi-commodity flows." Cincinnati, Ohio : University of Cincinnati, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1078512441.

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2

GHALEBSAZ-JEDDI, BABAK. "ANALYSIS AND SENSITIVITY OF STOCHASTIC CAPACITATED MULTI-COMMODITY FLOWS." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1078512441.

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3

Ishimatsu, Takuto. "Generalized multi-commodity network flows : case studies in space logistics and complex infrastructure systems." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82470.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2013.<br>This electronic version was submitted and approved by the author's academic department as part of an electronic thesis pilot project. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from department-submitted PDF version of thesis.<br>Includes bibliographical references (p. 153-157).<br>In transition to a new era of human space exploration, the question is what the next-generation space logistics paradigm should be. The past studies on space

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4

Lindberg, Per Olov, and Maria Mitradjieva. "The Stiff is Moving - Conjugate Direction Frank-Wolfe Methods with Applications to Traffic Assignment." KTH, Transport- och lokaliseringsanalys, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-71400.

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We present versions of the Frank-Wolfe method for linearly constrained convex programs, in which consecutive search directions are made conjugate. Preliminary computational studies in a MATLAB environment applying pure Frank-Wolfe, Conjugate direction Frank-Wolfe (CFW), Bi-conjugate Frank-Wolfe (BFW) and ”PARTANized” Frank-Wolfe methods to some classical Traffic Assignment Problems show that CFW and BFW compare favorably to the other methods. This spurred a more detailed study, comparing our methods to Bar-Gera’s origin-based algorithm. This study indicates that our methods are competitive for

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5

Emanuelsson, Kristoffer. "Approximating multi-commodity max-flow in practice." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-184193.

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Garg and Könemann developed a framework for computing multi-commodity maximum flow in a graph, later called a multiplicative weight update framework. Madry used this framework and exchanged Dijkstra’s algorithm to a dynamic graph algorithm for approximating the shortest paths through the graph. With this approachhe developed the fastest algorithm to date for calculating the multi-commodity maximum flow, with a running time of Õ(mnϵ2). This project have implemented the algorithm and compared it with a slightly modified version of the former fastest algorithm by Fleischer with a time complexity

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6

Kang, Dong Hun. "Multi-commodity flow estimation with partial counts on selected links." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4693.

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The purpose of this research is to formulate a multi-commodity network flow model for vehicular traffic in a geographic area and develop a procedure for estimating traffic counts based on available partial traffic data for a selected subset of highway links. Due to the restriction of time and cost, traffic counts are not always observed for every highway link. Typically, about 50% of the links have traffic counts in urban highway networks. Also, it should be noted that the observed traffic counts are not free from random errors during the data collection process. As a result, an incoming flow

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7

Stenberg, Josefin, and Sabina Syed. "Optimal Multi-Commodity Network Flow of Autonomous Vehicles in Urban Traffic." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297491.

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The focus of this thesis was to find, visualize and analyze the optimal flow of autonomous vehicles in urban traffic with respect to fuel consumption using linear optimization. Two different formulations based on multi-commodity network flow were implemented which resulted in a static and a dynamic model of the traffic. The static model was applied to Kungsholmen, an urban district in central Stockholm, Sweden, while the dynamic model was considered on a small-scale. These models led to large linear programs which were solved by applying different algorithms to the problems in various software

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8

Wang, Jie S. M. Massachusetts Institute of Technology. "Multi-period optimal network flow and pricing strategy for commodity online retailer." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55082.

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Thesis (S.M.)--Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 65).<br>This thesis aims to study the network of a nationwide distributor of a commodity product. As we cannot disclose the actual product for competitive reasons, we will present the research in terms of a similar, representative product, namely salt for ice prevention across United States. The distribution network includes four kinds of nodes, sources, buffer locations at sources, storage points and de

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9

Barnhart, Cynthia. "A network-based primal-dual solution methodology for the multi-commodity network flow problem." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14614.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1988.<br>Includes bibliographical references.<br>Work sponsored by North American Van Lines and the Center for Transportation Studies at M.I.T.<br>by Cynthia Barnhart.<br>Ph.D.

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10

Robinson, Kevin Michael. "Modeling of Distributed Naval Ship Systems using Architecture Flow Optimization." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83884.

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Successful future surface combatants in the US Navy must embrace the growing integration and interdependency of propulsive and combat systems. Traditionally, the development of Hull, Mechanical and Electrical systems has been segregated from the development of weapons and sensors. However, with the incorporation of high energy weapons into future ship configurations, ship design processes must evolve to embrace the concept of a System of Systems being the only way to achieve affordable capability in our future fleets. This thesis bridges the gap between the physical architecture of components

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11

Raack, Christian [Verfasser], and Martin [Akademischer Betreuer] Grötschel. "Capacitated Network Design - Multi-Commodity Flow Formulations, Cutting Planes, and Demand Uncertainty / Christian Raack. Betreuer: Martin Grötschel." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1024771962/34.

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12

Zambuzi, Nathalia de Castro. "Modelo de decisão para o planejamento da movimentação de contêineres vazios." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3148/tde-16082010-153458/.

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O presente trabalho trata do planejamento da movimentação de contêineres vazios ao longo de um conjunto de portos, buscando o balanceamento entre as demandas e ofertas dos mesmos em todos os portos ao menor custo, e considerando as restrições de capacidade de transporte dos modais envolvidos. Para isso será adotado um modelo de fluxo em rede multi-produto para representar o sistema de movimentação de contêineres vazios e que servirá de base para o desenvolvimento de uma formulação matemática, a qual, implementada através de uma ferramenta computacional de otimização, determina os fluxos de vaz

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13

Van, der Merwe Corna. "An optimisation approach to improve the throughput in wireless mesh networks through network coding / van der Merwe C." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7302.

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In this study, the effect of implementing Network Coding on the aggregated throughput in Wireless Mesh Networks, was examined. Wireless Mesh Networks (WMNs) are multiple hop wireless networks, where routing through any node is possible. The implication of this characteristic, is that messages flow across the points where it would have been terminated in conventional wireless networks. User nodes in conventional wireless networks only transmit and receive messages from an Access Point (AP), and discard any messages not intended for them. The result is an increase in the volume of network traffi

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14

Kang, Ya-Chi, and 康雅琪. "Cash flow and multi-commodity material flows allocation problem." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/56837831719134394711.

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碩士<br>國立高雄第一科技大學<br>運籌管理研究所<br>102<br>This study addressed the allocation problem of fund flow and multi-materials flows in the planning horizon for an enterprise. The problem was formulated as a mixed integer programming model which considers profit and cost at the same time and utilizes a time-space network model to present the movements of fund flow and materials flows. An illustrative example was created to test the proposed model. The sensitivity analysis was also performed to understand the interactions for different parameters.

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15

Acosta, Amado Rolando José. "A MULTI-COMMODITY NETWORK FLOW APPROACH FOR SEQUENCING REFINED PRODUCTS IN PIPELINE SYSTEMS." 2011. http://trace.tennessee.edu/utk_graddiss/940.

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In the oil industry, there is a special class of pipelines used for the transportation of refined products. The problem of sequencing the inputs to be pumped through this type of pipeline seeks to generate the optimal sequence of batches of products and their destination as well as the amount of product to be pumped such that the total operational cost of the system, or another operational objective, is optimized while satisfying the product demands according to the requirements set by the customers. This dissertation introduces a new modeling approach and proposes a solution methodology for t

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16

Artyomenko, Alexander. "Methods for Viral Population Analysis." 2017. http://scholarworks.gsu.edu/cs_diss/128.

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The ability of Next-Generation Sequencing (NGS) to produce massive quantities of genomic data inexpensively has allowed to study the structure of viral populations from an infected host at an unprecedented resolution. As a result of a high rate of mutation and recombination events, an RNA virus exists as a heterogeneous "swarm". Virologists and computational epidemiologists are widely using NGS data to study viral populations. However, discerning rare variants is muddled by the presence of errors introduced by the sequencing technology. We develop and implement time- and cost-efficient strateg

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17

Lan, Yao-Chi, and 藍堯祺. "SDN Update for Multi-Commodity Flow." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cjs4zx.

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碩士<br>國立政治大學<br>資訊科學系<br>106<br>To satisfy users’ real-time demands, network configurations have to be updated frequently. Nowadays, network operators can easily update network configurations through Software-Defined Network technology. However, during the period of network update, several bad side effects may occur, including loops and congestions. Given the current network configuration, this thesis jointly considers user priority and computes a new network configuration that maximizes the efficiency of the system under the constraint that no bad side effects can happen during the period of

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18

"Network design: districting and multi-commodity flow problems." 2002. http://library.cuhk.edu.hk/record=b6073407.

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by Ng Suk Fung.<br>"February 18, 2002."<br>Thesis (Ph.D.)--Chinese University of Hong Kong, 2002.<br>Includes bibliographical references (p. 215-222).<br>Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.<br>Mode of access: World Wide Web.<br>Abstracts in English and Chinese.

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19

藍家賢. "Study on the transportation capability of probabilistic multi-commodity flow network to meet the system demand." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/91827191222170025821.

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