Permanent Error
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Transient And Permanent Error Control For Networks On Chip
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Author : Qiaoyan Yu
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-11-18
Transient And Permanent Error Control For Networks On Chip written by Qiaoyan Yu and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-11-18 with Technology & Engineering categories.
This book addresses reliability and energy efficiency of on-chip networks using cooperative error control. It describes an efficient way to construct an adaptive error control codec capable of tracking noise conditions and adjusting the error correction strength at runtime. Methods are also presented to tackle joint transient and permanent error correction, exploiting the redundant resources already available on-chip. A parallel and flexible network simulator is also introduced, which facilitates examining the impact of various error control methods on network-on-chip performance.
Transient And Permanent Error Management For Networks On Chip
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Author : Qiaoyan Yu
language : en
Publisher:
Release Date : 2011
Transient And Permanent Error Management For Networks On Chip written by Qiaoyan Yu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
"Reliability has become one of the most important metrics for on-chip communications infrastructures in nanoscale technologies. Reduced supply voltages and high clock frequency exacerbate the impact of noise sources such as particle strikes and crosstalk, which can cause transient errors in transmitted data. Manufacturing defects and aging issues can cause permanent errors in the communication links. The modularity of the Networks-on-Chip (NoCs) approach facilitates the exploration of error control techniques for on-chip interconnects and many-cores systems. Unfortunately, error control is not free. Worst-case error management methods are simple but waste energy and bandwidth in favorable noise conditions. Consequently, cost-effective techniques for improving link error resilience are needed. In this work, we propose configurable error control methods to tackle variable transient errors and exploit existing transient error control redundancy for permanent error management, achieving high reliability and low average energy consumption with minor area overhead. To adapt to the variable transient error rates, a configurable error control coding (ECC) scheme is proposed for datalink-layer transient error management. The proposed method can adjust both error detection and error correction capability at runtime by varying the number of redundant wires for parity check bits. The obtained error resilience makes the proposed method suitable for a range of link error rates. Configuring the number of redundant wires to match the noise conditions reduces the average energy consumption in the ECC codec and interconnect link. A hardware efficient implementation for the configurable ECC is presented, as well. We integrate the error control techniques in the datalink and physical layers to co-manage transient and permanent errors. Infrequently used redundant wires for the configurable ECC are utilized as spare wires to replace permanently unusable links. To maintain the transient and permanent error co-management capability as noise conditions change, we propose a packet re-organization algorithm combined with shortening error control coding method. This method reduces the need for energy consuming fault-tolerant routing, minimizing latency and energy overhead induced by error control. This co-management method is suitable for NoCs operating in variable noise conditions with a small number of permanently unusable wires. To further improve energy efficiency, the adaptation on ECC is extended to the network layer. We employ end-to-end error control in the network layer in low noise conditions and enhance the error control capability in high noise conditions by adding hop-to-hop error control in the datalink layer. A protocol that boosts or reduces error control strength is presented to support runtime seamless ECC mode switching. Simply combining end-to-end error control with hop-to-hop error control significantly increases energy consumption. To address this issue, we apply the concept of product codes to the dual-layer error control; the hop-to-hop error control is designed to be compatible with one dimension of the product code. Consequently, the dual-layer cooperative error control can switch error control modes without interrupting normal NoC operation, achieving high reliability and energy efficiency in a wide range of link error rates. To evaluate performance and energy consumption of different error control methods on a large size NoC, we propose a flexible parallel NoC simulator. Plug-and-play error control coding (ECC) insertion and some typical error control codecs have been implemented in the simulator. The flexible fault injection environment provided by our simulator assists error control exploration for specific purposes. In addition, we use C and message passing interface (MPI) languages to schedule parallel simulation on a multiprocessor server, addressing the prohibitive simulation time and system resource challenges caused by the large number of communicating nodes and extensive number of simulation variables"--Leaves iv-vi.
W Rterbuch Der Datentechnik Dictionary Of Computing
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Author : Vittorio Ferretti
language : en
Publisher: Springer-Verlag
Release Date : 2013-03-08
W Rterbuch Der Datentechnik Dictionary Of Computing written by Vittorio Ferretti and has been published by Springer-Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-08 with Technology & Engineering categories.
Der FERRETTI bietet mehr als eine Übersetzungshilfe für deutsche und englische Fachbegriffe. 92.000 Stichwörter mit Kurzdefinitionen und Synonymen machen diese aktuelle Teilausgabe des erfolgreichen "Wörterbuch der Elektronik, Datentechnik und Telekommunikation" zum einzigartig umfassenden Nachschlagewerk der gesamten Informatik. Die 44.000 deutschen und 48.000 englischen Einträge decken zusätzlich die Hauptbegriffe der angrenzenden Fachgebiete und des allgemeinen Sprachgebrauchs ab. Zu insgesamt 94 Fachgebieten lassen sich alle datentechnischen Fragen schnell und kompetent lösen - ein schier unerschöpflicher Fundus für jeden, der hier nachschlägt.
Dollars Deficits Trade
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Author : James A. Dorn
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Dollars Deficits Trade written by James A. Dorn and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Business & Economics categories.
The essays in this volume are timelyand provocative. They address the key issues of the changing world economy and consider the implications ofthe erosion ofthe rule oflaw that has occurred both domestically and internationally to an increasing degree over the past halfcentury. The debates over the role of the dollar in the international econ omy, the future shape ofthe international monetary system and the exchange rate regime, the significance ofthe U.S. twin deficits, and the rise of nontariffbarriers to world trade deserve serious attention. Atthe bottom ofthese debates lie differing conceptions ofeconomic policy and the role of government in a free society. Adam Smith's vision ofa limited democracy operating to protect persons and prop erty has been increasinglyreplaced by a vision ofapaternalistic state that is designed to protect special interests at the expense of the larger society. Many of the contributors to this volume point to the lack oflong-run rules designed to promote sound money, fiscal integ rity, and open markets asthe fundamental flawofmodern democratic governments. Although the authors disagree on the specific rules to adopt, the consensus is that a constitutional perspective is needed to ensure astable worldorder. Moreover, since such aperspective must bedeveloped at home before it can spread among nations, the search for optimal international policy coordination is generally seen as misguided. Many ofthe essays in this volume were initially presented at the Cato Institute's Sixth Annual Monetary Conference held in Wash ington, D.C., February 25-26, 1988.
Distributed Network Systems
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Author : Weijia Jia
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-12-15
Distributed Network Systems written by Weijia Jia and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-12-15 with Computers categories.
Both authors have taught the course of “Distributed Systems” for many years in the respective schools. During the teaching, we feel strongly that “Distributed systems” have evolved from traditional “LAN” based distributed systems towards “Internet based” systems. Although there exist many excellent textbooks on this topic, because of the fast development of distributed systems and network programming/protocols, we have difficulty in finding an appropriate textbook for the course of “distributed systems” with orientation to the requirement of the undergraduate level study for today’s distributed technology. Specifically, from - to-date concepts, algorithms, and models to implementations for both distributed system designs and application programming. Thus the philosophy behind this book is to integrate the concepts, algorithm designs and implementations of distributed systems based on network programming. After using several materials of other textbooks and research books, we found that many texts treat the distributed systems with separation of concepts, algorithm design and network programming and it is very difficult for students to map the concepts of distributed systems to the algorithm design, prototyping and implementations. This book intends to enable readers, especially postgraduates and senior undergraduate level, to study up-to-date concepts, algorithms and network programming skills for building modern distributed systems. It enables students not only to master the concepts of distributed network system but also to readily use the material introduced into implementation practices.
Permanent Magnet Synchronous And Brushless Dc Motor Drives
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Author : Ramu Krishnan
language : en
Publisher: CRC Press
Release Date : 2017-12-19
Permanent Magnet Synchronous And Brushless Dc Motor Drives written by Ramu Krishnan and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Technology & Engineering categories.
Despite two decades of massive strides in research and development on control strategies and their subsequent implementation, most books on permanent magnet motor drives still focus primarily on motor design, providing only elementary coverage of control and converters. Addressing that gap with information that has largely been disseminated only in journals and at conferences, Permanent Magnet Synchronous and Brushless DC Motor Drives is a long-awaited comprehensive overview of power electronic converters for permanent magnet synchronous machines and control strategies for variable-speed operation. It introduces machines, power devices, inverters, and control, and addresses modeling, implementation, control strategies, and flux weakening operations, as well as parameter sensitivity, and rotor position sensorless control. Suitable for both industrial and academic audiences, this book also covers the simulation, low cost inverter topologies, and commutation torque ripple of PM brushless DC motor drives. Simulation of the motor drives system is illustrated with MATLAB® codes in the text. This book is divided into three parts—fundamentals of PM synchronous and brushless dc machines, power devices, inverters; PM synchronous motor drives, and brushless dc motor drives. With regard to the power electronics associated with these drive systems, the author: Explores use of the standard three-phase bridge inverter for driving the machine, power factor correction, and inverter control Introduces space vector modulation step by step and contrasts with PWM Details dead time effects in the inverter, and its compensation Discusses new power converter topologies being considered for low-cost drive systems in PM brushless DC motor drives This reference is dedicated exclusively to PM ac machines, with a timely emphasis on control and standard, and low-cost converter topologies. Widely used for teaching at the doctoral level and for industrial audiences both in the U.S. and abroad, it will be a welcome addition to any engineer’s library.
Advanced Direct Thrust Force Control Of Linear Permanent Magnet Synchronous Motor
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Author : Muhammad Ali Masood Cheema
language : en
Publisher: Springer Nature
Release Date : 2020-02-13
Advanced Direct Thrust Force Control Of Linear Permanent Magnet Synchronous Motor written by Muhammad Ali Masood Cheema and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-13 with Technology & Engineering categories.
This book explores the direct thrust force control (DTFC) of tubular surface-mount linear permanent magnet synchronous motors (linear PMSMs). It presents a detailed account and analysis of several advanced nonlinear control schemes, based on the direct thrust control principle, to achieve a reduction in steady-state ripple in thrust force with faster transient response, and describes their experimental validation. It also provides rigorous details of the dynamic modelling of linear PMSMs from a control system perspective, and demonstrates the superior control performance of the proposed techniques compared to the current state-of-the-art techniques. Lastly, the book proposes and validates a stator flux observer for sensorless speed estimation comprising a linear state observer and an improved sliding mode component.
Permanent Magnet Synchronous Machines
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Author : Sandra Eriksson
language : en
Publisher: MDPI
Release Date : 2019-08-20
Permanent Magnet Synchronous Machines written by Sandra Eriksson and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-20 with Technology & Engineering categories.
Interest in permanent magnet synchronous machines (PMSMs) is continuously increasing worldwide, especially with the increased use of renewable energy and the electrification of transports. This book contains the successful submissions of fifteen papers to a Special Issue of Energies on the subject area of “Permanent Magnet Synchronous Machines”. The focus is on permanent magnet synchronous machines and the electrical systems they are connected to. The presented work represents a wide range of areas. Studies of control systems, both for permanent magnet synchronous machines and for brushless DC motors, are presented and experimentally verified. Design studies of generators for wind power, wave power and hydro power are presented. Finite element method simulations and analytical design methods are used. The presented studies represent several of the different research fields on permanent magnet machines and electric drives.
Transient And Permanent Error Control For Networks On Chip
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Author : Springer
language : en
Publisher:
Release Date : 2012-05-01
Transient And Permanent Error Control For Networks On Chip written by Springer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-01 with categories.
Permanent Income Wealth And Consumption
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Author : Thomas Mayer
language : en
Publisher: Univ of California Press
Release Date : 1972
Permanent Income Wealth And Consumption written by Thomas Mayer and has been published by Univ of California Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Business & Economics categories.