Download or read book Multiattribute Multicommodity Flows in Transportation Networks written by Douglas Allen Popken and published by . This book was released on 1988 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previously developed minimum cost multicommodity network flow models do not simultaneously consider the weights, volumes, and inventory holding costs of the commodities. ignoring one or more of these attributes may prevent detection of potential savings; however, simultaneously accounting for all three attributes leads to a problem considerably more difficult to solve. This thesis examines a multiattribute multicommodity flow formulation of a transportation network with transshipment terminals, which seeks to minimize total vehicle and inventory related costs. First, a decomposition strategy transforms the model formulation, P, into an equivalent formulation, P'. In P', the vehicle flow variables may be found as function of the commodity flow variables; furthermore, the vehicle capacity constraints need not be explicitly considered. The decomposition, however, creates a situation whereby a commodity's incremental cost function on a given arc may contain concave and/or convex portions. This feature implies the presence of numerous local optima, over which an exhaustive search for a global optimum is computationally infeasible. Computational results from a series of test problems measure solution quality and algorithm efficiency. (SDW).
Download or read book Multicommodity Supply and Transportation Networks with Resource Constraints written by Richard D. Wollmer and published by . This book was released on 1970 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper presents a method for treating multicommodity network flows in which limited resources are shared among several arcs instead of only one. The study extends the previous solution methds for networks with individual arc capacity constraints to cover joint constraints. This formulation can handle one or more joint capacity constraints in a multicommodity network; with some adjustment in the objective function, it can maximize a linear combination of commodity flows and find a feasible routing to meet flow requirements.
Download or read book Minimum cost multi commodity network flows written by and published by . This book was released on 1969 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multicommodity Supply and Transportation Networks with Resource Constraint written by Richard D. Wollmer and published by . This book was released on 1969 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Logistics Systems Analysis written by Carlos F. Daganzo and published by Springer Science & Business Media. This book was released on 2013-04-18 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines logistics systems in an integrated way. Its goal is to describe and show how to find rational structures for logistics systems considering all the relevant aspects. Building on an understanding of the simplest logistical system with only one origin and one destination, the book treats problems with many origins and one destination, many destinations and one origin, and many origins and many destinations; this is done for systems with and without transshipments. The solutions and methodologies presented in the book are particularly helpful in instances where detailed data are not available and when time is of the essence.
Download or read book Optimal Design of Transportation Networks with Fluctuating Demands written by José Luis Aburto Avila and published by . This book was released on 1900 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Logistics Systems Analysis written by Carlos Daganzo and published by Springer Science & Business Media. This book was released on 2005-04-19 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: "... a well structured and documented book that certainly reflects the new era of logistics." Journal of the Operational Research Society (of a previous edition) Expanded edition includes new research results and numerous modifications to enhance comprehensiveness and clarity. Two new sections, a new appendix, and more than half a dozen new figures. Provides new concept for an integrated examination of logistics systems Features "reasonable" solutions requiring as little information as possible
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Oata Analysis and Synthesis (CINOAS) * at Purdue. University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 33 (thesis year 1988) a total of 13,273 theses titles from 23 Canadian and 1 85 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 33 reports theses submitted in 1988, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Download or read book Handbooks in Operations Research and Management Science Transportation written by Cynthia Barnhart and published by Elsevier. This book was released on 2006-12-08 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains eleven chapters describing some of the most recent methodological operations research developments in transportation. It is structured around the main transportation modes, and each chapter is written by a group of well-recognized researchers. Because of the major impact of operations research methods in the field of air transportation over the past forty years, it is befitting to open the book with a chapter on airline operations management. This book will prove useful to researchers, students, and practitioners in transportation and will stimulate further research in this rich and fascinating area. - Volume 14 examines transport and its relationship with operations and management science - 11 chapters cover the most recent research developments in transportation - Focuses on main transportation modes-air travel, automobile, public transit, maritime transport, and more
Download or read book Encyclopedia of Optimization written by Christodoulos A. Floudas and published by Springer Science & Business Media. This book was released on 2008-09-04 with total page 4646 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the Encyclopedia of Optimization is to introduce the reader to a complete set of topics that show the spectrum of research, the richness of ideas, and the breadth of applications that has come from this field. The second edition builds on the success of the former edition with more than 150 completely new entries, designed to ensure that the reference addresses recent areas where optimization theories and techniques have advanced. Particularly heavy attention resulted in health science and transportation, with entries such as "Algorithms for Genomics", "Optimization and Radiotherapy Treatment Design", and "Crew Scheduling".
Download or read book Multi commodity Flow Estimation with Partial Counts on Selected Links written by Dong Hun Kang and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 into a highway node and an outgoing flow from the node do not usually match. They need to be adjusted to satisfy a flow conservation condition, which is one of the fundamental concepts in network flow analysis. In this dissertation, the multi-commodity link flows are estimated in a two-stage process. First, traffic flows of "empty" links, which have no observation data, are filled with deterministic user equilibrium traffic assignments. This user equilibrium assignment scheme assumes that travelers select their routes by their own interests without considering total cost of the system. The assignment also considers congestion effects by taking a link travel cost as a function of traffic volume on the link. As a result, the assignment problem has a nonlinear objective function and linear network constraints. The modified Frank-Wolfe algorithm, which is a type of conditional gradient method, is used to solve the assignment problem. The next step is to consider both of the observed traffic counts on selected links and the deterministic user equilibrium assignments on the group of remaining links to produce the final traffic count estimates by the generalized least squares optimization procedure. The generalized least squares optimization is conducted under a set of relevant constraints, including the flow conservation condition for all highway intersections.
Download or read book Time dependent Multimodal Multicommodity Freight Network Assignment Model written by Kuo-chih Yang and published by . This book was released on 1998 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Dynamic Multi commodity Multi mode Network Flow Model written by Donald J. Hunt and published by . This book was released on 1969 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper describes a dynamic multi-commodity, multi-mode network flow model which permits time phasing of commodity load inputs and derives delivery schedules to the respective destinations over a time span of interest to the user. The model makes use of a time-expanded network. Methodology for time expanding a basic network is described and an algorithm for determining the commodity flow allocations is provided. Implementation of the model has been made. A number of innovative programming steps which make possible very efficient processing are described and computing experience with several different network problems is reported. (Author).
Download or read book Multi commodity Flows in Generalized Networks written by Woodrow Steven Demmy and published by . This book was released on 1967 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Operations Research and Management Science written by Saul I. Gass and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: Operations Research: 1934-1941," 35, 1, 143-152; "British The goal of the Encyclopedia of Operations Research and Operational Research in World War II," 35, 3, 453-470; Management Science is to provide to decision makers and "U. S. Operations Research in World War II," 35, 6, 910-925; problem solvers in business, industry, government and and the 1984 article by Harold Lardner that appeared in academia a comprehensive overview of the wide range of Operations Research: "The Origin of Operational Research," ideas, methodologies, and synergistic forces that combine to 32, 2, 465-475. form the preeminent decision-aiding fields of operations re search and management science (OR/MS). To this end, we The Encyclopedia contains no entries that define the fields enlisted a distinguished international group of academics of operations research and management science. OR and MS and practitioners to contribute articles on subjects for are often equated to one another. If one defines them by the which they are renowned. methodologies they employ, the equation would probably The editors, working with the Encyclopedia's Editorial stand inspection. If one defines them by their historical Advisory Board, surveyed and divided OR/MS into specific developments and the classes of problems they encompass, topics that collectively encompass the foundations, applica the equation becomes fuzzy. The formalism OR grew out of tions, and emerging elements of this ever-changing field. We the operational problems of the British and U. s. military also wanted to establish the close associations that OR/MS efforts in World War II.
Download or read book A Multi commodity Multi modal Network Flow Model for Logistics Management written by Sei-Chang Oh and published by . This book was released on 1993 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1989 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
