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Flow Networks

Flow Networks Book
Author : Michael T. Todinov
Publisher : Newnes
Release : 2013-01-16
ISBN : 0123984068
Language : En, Es, Fr & De

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Book Description :

Repairable flow networks are a new area of research, which analyzes the repair and flow disruption caused by failures of components in static flow networks. This book addresses a gap in current network research by developing the theory, algorithms and applications related to repairable flow networks and networks with disturbed flows. The theoretical results presented in the book lay the foundations of a new generation of ultra-fast algorithms for optimizing the flow in networks after failures or congestion, and the high computational speed creates the powerful possibility of optimal control of very large and complex networks in real time. Furthermore, the possibility for re-optimizing the network flows in real time increases significantly the yield from real production networks and reduces to a minimum the flow disruption caused by failures. The potential application of repairable flow networks reaches across many large and complex systems, including active power networks, telecommunication networks, oil and gas production networks, transportation networks, water supply networks, emergency evacuation networks, and supply networks. The book reveals a fundamental flaw in classical algorithms for maximising the throughput flow in networks, published since the creation of the theory of flow networks in 1956. Despite the years of intensive research, the classical algorithms for maximising the throughput flow leave highly undesirable directed loops of flow in the optimised networks. These flow loops are associated with wastage of energy and resources and increased levels of congestion in the optimised networks. Includes theory and practical examples to build a deep understanding of the issues Written by the leading scholar and researcher in this emerging field Features powerful software tools for analysis, optimization and control of repairable flow networks

Foundations of Molecular Flow Networks for Vacuum System Analysis

Foundations of Molecular Flow Networks for Vacuum System Analysis Book
Author : Nagamitsu Yoshimura
Publisher : Academic Press
Release : 2019-11-13
ISBN : 0128186887
Language : En, Es, Fr & De

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Book Description :

Foundations of Molecular-Flow Networks for Vacuum System Analysis is the only book that covers desorption, adsorption and outgassing in relation to molecular-flow networks. It will be beneficial for academics, students and industry personnel working in the field of ultra-high vacuums for designing the equipment/set-up and as a guide to understand the processes relating to vacuums. The book is fully supported with equations and case studies from industry. Vacuum technology is extensively used in large synchrotrons and other large accelerators, as well as in many other smaller industrial and scientific facilities. Hence, this book is a welcome addition to the literature. Explains how to design, model and simulate vacuum systems to obtain satisfactory pressure distributions Offers a practical description of molecular flow, providing techniques to design molecular flow networks of vacuum systems and processes Explores equivalence with electrical components to help readers with simulation using free software such as LTSPICE

Mathematics of Traffic Flow Networks

Mathematics of Traffic Flow Networks Book
Author : Michael Herty
Publisher : Unknown
Release : 2004
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Traffic flow has been a continuous source of challenging mathematical problems. The following work is dedicated to recent questions in modeling, simulation and optimization of traffic flow networks. Mathematics can help to solve traffic problems in different ways. Modelling provides fundamental understanding of traffic dynamics and behaviour. Optimization yields solutions for complex situations and helps to organize traffic flow. During the last decade there has been intensive research in different fields of and related to traffic flow. One of the primary research activities focus on the development of new and more realistic models for traffic flow on a single road. Our work's primary focus is on models for networks. We provide new ideas on modelling flow in networks and solve different optimization problems analytically and numerically. The main result is the derivation of a hierarchy of models treating different situations with suitable traffic flow models. To each level of modeling we consider the optimal control problems and present techniques to address those problems. Furthermore, we derive an adjoint calculus for scalar hyperbolic equations with nonlinear boundary controls. The derived concepts fit for general network problems as well as they do for traffic flow issues. The principles of modeling and simplification can be applied to all kinds of network flows, like fluid flow in open channels or gas networks.

Control and Analysis of Fluid Flow Networks

Control and Analysis of Fluid Flow Networks Book
Author : Olga Igorevna Koroleva
Publisher : Unknown
Release : 2004
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Control and Analysis of Fluid Flow Networks book written by Olga Igorevna Koroleva, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

A Numerical Study on Turbulent Flow and Heat Transfer in Flow Networks

A Numerical Study on Turbulent Flow and Heat Transfer in Flow Networks Book
Author : Jongmin Shin
Publisher : Unknown
Release : 1998
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download A Numerical Study on Turbulent Flow and Heat Transfer in Flow Networks book written by Jongmin Shin, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Gravity Driven Water Flow in Networks

Gravity Driven Water Flow in Networks Book
Author : Gerard F. Jones
Publisher : John Wiley & Sons
Release : 2011-12-29
ISBN : 9781118002087
Language : En, Es, Fr & De

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Book Description :

Gravity-driven water flow networks are a crucial method of delivering clean water to millions of people worldwide, and an essential agricultural tool. This book provides an all-encompassing guide to designing these water networks, combining theory and case studies. It includes design formulas for water flow in single or multiple, uniform or non-uniform diameter pipe networks; case studies on how systems are built, used, and maintained; comprehensive coverage of pipe materials, pressure ratings, and dimensions; and over 100 illustrations and tables. It is a key resource both for working engineers and engineering students and instructors.

Routing Flow and Capacity Design in Communication and Computer Networks

Routing  Flow  and Capacity Design in Communication and Computer Networks Book
Author : Michal Pioro,Deep Medhi
Publisher : Elsevier
Release : 2004-07-21
ISBN : 0080516432
Language : En, Es, Fr & De

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Book Description :

In network design, the gap between theory and practice is woefully broad. This book narrows it, comprehensively and critically examining current network design models and methods. You will learn where mathematical modeling and algorithmic optimization have been under-utilized. At the opposite extreme, you will learn where they tend to fail to contribute to the twin goals of network efficiency and cost-savings. Most of all, you will learn precisely how to tailor theoretical models to make them as useful as possible in practice. Throughout, the authors focus on the traffic demands encountered in the real world of network design. Their generic approach, however, allows problem formulations and solutions to be applied across the board to virtually any type of backbone communication or computer network. For beginners, this book is an excellent introduction. For seasoned professionals, it provides immediate solutions and a strong foundation for further advances in the use of mathematical modeling for network design. Written by leading researchers with a combined 40 years of industrial and academic network design experience. Considers the development of design models for different technologies, including TCP/IP, IDN, MPLS, ATM, SONET/SDH, and WDM. Discusses recent topics such as shortest path routing and fair bandwidth assignment in IP/MPLS networks. Addresses proper multi-layer modeling across network layers using different technologies—for example, IP over ATM over SONET, IP over WDM, and IDN over SONET. Covers restoration-oriented design methods that allow recovery from failures of large-capacity transport links and transit nodes. Presents, at the end of each chapter, exercises useful to both students and practitioners.

Flow Networks

Flow Networks Book
Author : Michael T. Todinov
Publisher : Elsevier
Release : 2013-02-15
ISBN : 9780323282741
Language : En, Es, Fr & De

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Book Description :

Download Flow Networks book written by Michael T. Todinov, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Flow Control of Congested Networks

Flow Control of Congested Networks Book
Author : Amedeo R. Odoni,Lucio Bianco,Giorgio Szegö
Publisher : Springer Science & Business Media
Release : 2012-12-06
ISBN : 364286726X
Language : En, Es, Fr & De

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Book Description :

This volume is a compendium of papers presented during the NATO Workshop which took place in Capri, Italy, October 12-18, 1986 on the general subject of "Flow Control of Congested Networks: The Case of Data Processing and Transportation", and of which we acted as co-chairmen. The focus of the workshop was on flow control methodologies, as applied to preventing or reducing congestion on: (1) data communication networks; (2) urban transportation networks; and (3) air traffic control systems. The goals of the workshop included: review of the state-of-the-art of flow control methodologies, in general, and in each of the three application areas; identification of similarities and differences in the objective functions, modeling approaches and mathematics used in the three areas; examination of opportunities for "technology transfers" and for future interactions among researchers in the three areaso These goals were pursued through individual presentations of papers on current research by workshop participants and, in the cases of the second and third goals, through a number of open-ended discussion and-review sessions which were interspersed throughout the workshop's programmeD The full texts or extended summaries of all but a few of the papers given at the workshop are included in this volume.

Stochastic Sensitivity Analysis of Maximum Flow Networks

Stochastic Sensitivity Analysis of Maximum Flow Networks Book
Author : Richard D. Wollmer
Publisher : Unknown
Release : 1965
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

A maximum flow network is defined by a set of arcs and a set of points called nodes. Each arc joins two nodes and has associated with it a positive capacity which represents the maximum amount of flow that may pass over it. One of the nodes is designated as the source and another as the sink. From these nodes, arcs, and capacities the maximum amount of flow that may pass from source to sink may be calculated. This investigation is concerned with a sensitivity analysis on a class of such networks known as planar networks. Specifically, each arc of the network is subject to anywhere from one to n breakdowns which result in a reduction in its capacity. The amount of this reduction in capacity is a random variable with known mean and variance. It is desired to find the smallest possible value of F resulting from, at most, n breakdowns.

A Muskingum Cunge Channel Flow Routing Method for Drainage Networks

A Muskingum Cunge Channel Flow Routing Method for Drainage Networks Book
Author : Jürgen Garbrecht,Gary W. Brunner
Publisher : Unknown
Release : 1991
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

A Muskingum-Cunge channel flow routing scheme is modified for application to large drainage networks with compound cross sections and for continuous long-term simulation. The modifications consist of a decoupling and separate routing of main and overbank channel flow, an introduction of a variable time step to increase model efficiency during periods of steady flow, and an interval determination of the numerical increment. The resulting hydrologic model is verified by comparing its flow routing results with those of hydraulic benchmark models solving the full unsteady flow equations. Test conditions consist of hypothetical flood hydrographs, long prismatic channels with simple and compound sections, and a third order drainage network. For the tested conditions, the model produces hydrograph peaks, times to peak and shapes that compare well with those of the hydraulic benchmarks. Hydrograph distortions due to overbank flood plain storage and multiple peaks from complex drainage networks are also well reproduced. The execution time of the model is generally one order of magnitude faster than that of the hydraulic benchmark models. Muskingum-Cunge, Channel Flow Routing, drainage networks, Compound Cross- Sections, variable time step.

Control of Flow Networks with Constraints and Optimality Conditions

Control of Flow Networks with Constraints and Optimality Conditions Book
Author : Tjeert Wobko Scholten
Publisher : Unknown
Release : 2017
ISBN : 9789403400594
Language : En, Es, Fr & De

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Book Description :

Download Control of Flow Networks with Constraints and Optimality Conditions book written by Tjeert Wobko Scholten, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Analysis and Modelling of Non Steady Flow in Pipe and Channel Networks

Analysis and Modelling of Non Steady Flow in Pipe and Channel Networks Book
Author : Vinko Jovic
Publisher : John Wiley & Sons
Release : 2013-03-08
ISBN : 1118536886
Language : En, Es, Fr & De

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Book Description :

Analysis and Modelling of Non-Steady Flow in Pipe and Channel Networks deals with flows in pipes and channel networks from the standpoints of hydraulics and modelling techniques and methods. These engineering problems occur in the course of the design and construction of hydroenergy plants, water-supply and other systems. In this book, the author presents his experience in solving these problems from the early 1970s to the present day. During this period new methods of solving hydraulic problems have evolved, due to the development of computers and numerical methods. This book is accompanied by a website which hosts the author's software package, Simpip (an abbreviation of simulation of pipe flow) for solving non-steady pipe flow using the finite element method. The program also covers flows in channels. The book presents the numerical core of the SimpipCore program (written in Fortran). Key features: Presents the theory and practice of modelling different flows in hydraulic networks Takes a systematic approach and addresses the topic from the fundamentals Presents numerical solutions based on finite element analysis Accompanied by a website hosting supporting material including the SimpipCore project as a standalone program Analysis and Modelling of Non-Steady Flow in Pipe and Channel Networks is an ideal reference book for engineers, practitioners and graduate students across engineering disciplines.

Activity Networks

Activity Networks Book
Author : Salah E. Elmaghraby
Publisher : John Wiley & Sons
Release : 1977
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Activity Networks book written by Salah E. Elmaghraby, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Proceedings of the 2003 ASME Summer Heat Transfer Conference

Proceedings of the 2003 ASME Summer Heat Transfer Conference Book
Author : Anonim
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Proceedings of the 2003 ASME Summer Heat Transfer Conference book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Generalized Network Flows with an Application to Multiprocessor Scheduling

Generalized Network Flows with an Application to Multiprocessor Scheduling Book
Author : Charles U. Martel
Publisher : Unknown
Release : 1980
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Generalized Network Flows with an Application to Multiprocessor Scheduling book written by Charles U. Martel, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Proceedings of the ASME Heat Transfer Division

Proceedings of the ASME Heat Transfer Division Book
Author : Anonim
Publisher : Unknown
Release : 1998
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Proceedings of the ASME Heat Transfer Division book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

A Fault Diagnosis Technique for Closed Flow Networks

A Fault Diagnosis Technique for Closed Flow Networks Book
Author : K. Matsui,D. K. Pradhan,OAKLAND UNIV ROCHESTER MI SCHOOL OF ENGINEERING.
Publisher : Unknown
Release : 1980
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Closed flow networks represent a mathematical model for transportation networks multiple resource computer systems and computer communication networks. A fault-diagnosis technique for these networks is presented which can locate all single edge failures in the network. This technique is based on a flow casualty relationship developed here. The number of edges that need to be monitored is shown to be (n-1) for an n-node network. These edges constitute the branches of a tree in the network. (Author).

Flows in Networks Under Fuzzy Conditions

Flows in Networks Under Fuzzy Conditions Book
Author : Alexander Vitalievich Bozhenyuk,Evgeniya Michailovna Gerasimenko,Janusz Kacprzyk,Igor Naymovich Rozenberg
Publisher : Springer
Release : 2016-07-30
ISBN : 3319416189
Language : En, Es, Fr & De

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Book Description :

This book offers a comprehensive introduction to fuzzy methods for solving flow tasks in both transportation and networks. It analyzes the problems of minimum cost and maximum flow finding with fuzzy nonzero lower flow bounds, and describes solutions to minimum cost flow finding in a network with fuzzy arc capacities and transmission costs. After a concise introduction to flow theory and tasks, the book analyzes two important problems. The first is related to determining the maximum volume for cargo transportation in the presence of uncertain network parameters, such as environmental changes, measurement errors and repair work on the roads. These parameters are represented here as fuzzy triangular, trapezoidal numbers and intervals. The second problem concerns static and dynamic flow finding in networks under fuzzy conditions, and an effective method that takes into account the network’s transit parameters is presented here. All in all, the book provides readers with a practical reference guide to state-of-the art fuzzy methods for solving flow tasks and offers a valuable resource for all researchers and postgraduate students in the fields of network theory, fuzzy models and decision-making.