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1000 tulosta hakusanalla Wen Qiang Wang

PID Control for Multivariable Processes

PID Control for Multivariable Processes

Qing-Guo Wang; Zhen Ye; Wen-Jian Cai; Chang-Chieh Hang

Springer-Verlag Berlin and Heidelberg GmbH Co. K
2008
nidottu
Thereare richtheories and designs for generalcontrolsystems,but usually, they will not lead to PID controllers. Noting that the PID controller has been the most popular one in industry for over ?fty years, we will con?ne our discussion hereto PIDcontrolonly. PID controlhasbeenanimportantresearchtopicsince 1950’s, and causes remarkable activities for the last two decades. Most of the existing works have been on the single variable PID control and its theory and design are well established, understood and practically applied. However, most industrial processes are of multivariable nature. It is not rare that the overall multivariable PID control system could fail although each PID loop may work well. Thus,demandforaddressingmultivariableinteractionsishighforsuccessful applicationofPIDcontrolinmultivariableprocessesanditisevidentfrommajor leading control companies who all rankedthe couplings of multivariable systems as the principal common problem in industry. There have been studies on PID control for multivariable processes and they provide some useful design tools for certaincases. But itis notedthat the existing worksaremainlyfor decentralized form of PID control and based on ad hoc methodologies. Obvious, multivariable PID control is much less understood and developed in comparison with the single variable case and actual need for industrial applications. Better theory and design have to be established for multivariable PID control to reach the same maturity and popularity as the single variable case. The present monograph puts together, in a single volume, a fairly comp- hensive, up-to-date and detailed treatment of PID control for multivariable p- cesses, from paring, gain and phase margins, to various design methods and applications.
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Index Modulation for OFDM Communications Systems

Index Modulation for OFDM Communications Systems

Miaowen Wen; Qiang Li; Xiang Cheng

Springer Verlag, Singapore
2021
sidottu
Thanks to their considerable advantages, index modulation and orthogonal frequency division multiplexing (OFDM) are considered to be promising candidates for future wireless communications. This book focuses on the index modulation techniques for OFDM communications systems, which allow information to be conveyed not only via constellation symbols, but also by the indices of various transmission entities in OFDM systems, such as signal constellations, spreading codes, and pilots. The book discusses representative transmitter and receiver designs, optimization and performance analysis of index modulation based on various transmission entities. It first introduces readers to constellation-based index modulation via a combinatorial approach, including the classical index modulation scheme and two embodiments of information-guided precoding for OFDM systems. It further discusses constellation-based index modulation via a permutational approach, including the basic, generalized, and diversity-enhancing forms. It then describes how the spreading code is used to design an index modulated spread spectrum for OFDM systems, and the extensions to multi-code and multi-user scenarios. In addition it explores information guided pilot insertion for OFDM systems, followed by applications to carrier phase tracking and channel estimation. Lastly, the book highlights a number of open problems and discusses future research directions in the general field of index modulation. Intended for professionals and researchers in the field of wireless communications, this book is also a valuable resource for advanced-level electrical engineering and computer science students.
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Index Modulation for OFDM Communications Systems

Index Modulation for OFDM Communications Systems

Miaowen Wen; Qiang Li; Xiang Cheng

SPRINGER VERLAG, SINGAPORE
2022
nidottu
Thanks to their considerable advantages, index modulation and orthogonal frequency division multiplexing (OFDM) are considered to be promising candidates for future wireless communications. This book focuses on the index modulation techniques for OFDM communications systems, which allow information to be conveyed not only via constellation symbols, but also by the indices of various transmission entities in OFDM systems, such as signal constellations, spreading codes, and pilots. The book discusses representative transmitter and receiver designs, optimization and performance analysis of index modulation based on various transmission entities. It first introduces readers to constellation-based index modulation via a combinatorial approach, including the classical index modulation scheme and two embodiments of information-guided precoding for OFDM systems. It further discusses constellation-based index modulation via a permutational approach, including the basic, generalized, and diversity-enhancing forms. It then describes how the spreading code is used to design an index modulated spread spectrum for OFDM systems, and the extensions to multi-code and multi-user scenarios. In addition it explores information guided pilot insertion for OFDM systems, followed by applications to carrier phase tracking and channel estimation. Lastly, the book highlights a number of open problems and discusses future research directions in the general field of index modulation. Intended for professionals and researchers in the field of wireless communications, this book is also a valuable resource for advanced-level electrical engineering and computer science students.
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Recurrence Interval Analysis of Financial Time Series

Recurrence Interval Analysis of Financial Time Series

Wei-Xing Zhou; Zhi-Qiang Jiang; Wen-Jie Xie

Cambridge University Press
2024
pokkari
Extreme events are ubiquitous in nature and social society, including natural disasters, accident disasters, crises in public health (such as Ebola and the COVID-19 pandemic), and social security incidents (wars, conflicts, and social unrest). These extreme events will heavily impact financial markets and lead to the appearance of extreme fluctuations in financial time series. Such extreme events lack statistics and are thus hard to predict. Recurrence interval analysis provides a feasible solution for risk assessment and forecasting. This Element aims to provide a systemic description of the techniques and research framework of recurrence interval analysis of financial time series. The authors also provide perspectives on future topics in this direction.
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Recurrence Interval Analysis of Financial Time Series

Recurrence Interval Analysis of Financial Time Series

Wei-Xing Zhou; Zhi-Qiang Jiang; Wen-Jie Xie

Cambridge University Press
2024
sidottu
Extreme events are ubiquitous in nature and social society, including natural disasters, accident disasters, crises in public health (such as Ebola and the COVID-19 pandemic), and social security incidents (wars, conflicts, and social unrest). These extreme events will heavily impact financial markets and lead to the appearance of extreme fluctuations in financial time series. Such extreme events lack statistics and are thus hard to predict. Recurrence interval analysis provides a feasible solution for risk assessment and forecasting. This Element aims to provide a systemic description of the techniques and research framework of recurrence interval analysis of financial time series. The authors also provide perspectives on future topics in this direction.
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Overview of Low-Carbon Development

Overview of Low-Carbon Development

Xiangwan Du; Dadi Zhou; Qingchen Chao; Zongguo Wen; Taoli Huhe; Qiang Liu

Springer Verlag, Singapore
2019
sidottu
This book introduces readers to the status quo and recent advances in China’s low-carbon development. From the evolution of human civilization, to the proposal of low-carbon concepts, up to the choice of China’s low-carbon path, the book provides a comprehensive review of low-carbon development, while also elaborating on the core concept, goals and methods. In addition, it addresses a series of questions and issues closely tied to today’s social development, such as: “Why is it so vital to pursue low-carbon development?” and “How can China implement low-carbon development?” Accordingly, readers will gain a better grasp of low-carbon development, including low-carbon production and low-carbon lifestyles.
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Overview of Low-Carbon Development

Overview of Low-Carbon Development

Xiangwan Du; Dadi Zhou; Qingchen Chao; Zongguo Wen; Taoli Huhe; Qiang Liu

Springer Verlag, Singapore
2020
nidottu
This book introduces readers to the status quo and recent advances in China’s low-carbon development. From the evolution of human civilization, to the proposal of low-carbon concepts, up to the choice of China’s low-carbon path, the book provides a comprehensive review of low-carbon development, while also elaborating on the core concept, goals and methods. In addition, it addresses a series of questions and issues closely tied to today’s social development, such as: “Why is it so vital to pursue low-carbon development?” and “How can China implement low-carbon development?” Accordingly, readers will gain a better grasp of low-carbon development, including low-carbon production and low-carbon lifestyles.
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Arc of Containment

Arc of Containment

Wen-Qing Ngoei

Cornell University Press
2019
sidottu
Arc of Containment recasts the history of American empire in Southeast and East Asia from World War II through the end of American intervention in Vietnam. Setting aside the classic story of anxiety about falling dominoes, Wen-Qing Ngoei articulates a new regional history premised on strong security and sure containment guaranteed by Anglo-American cooperation. Ngoei argues that anticommunist nationalism in Southeast Asia intersected with preexisting local antipathy toward China and the Chinese diaspora to usher the region from European-dominated colonialism to US hegemony. Central to this revisionary strategic assessment is the place of British power and the effects of direct neocolonial military might and less overt cultural influences based on decades of colonial rule, as well as the considerable influence of Southeast Asian actors upon Anglo-American imperial strategy throughout the post-war period. Arc of Containment demonstrates that American failure in Vietnam had less long-term consequences than widely believed because British pro-West nationalism had been firmly entrenched twenty-plus years earlier. In effect, Ngoei argues, the Cold War in Southeast Asia was but one violent chapter in the continuous history of western imperialism in the region in the twentieth century.
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Arc of Containment

Arc of Containment

Wen-Qing Ngoei

CORNELL UNIVERSITY PRESS
2023
pokkari
Arc of Containment recasts the history of American empire in Southeast and East Asia from World War II through the end of American intervention in Vietnam. Setting aside the classic story of anxiety about falling dominoes, Wen-Qing Ngoei articulates a new regional history premised on strong security and sure containment guaranteed by Anglo-American cooperation. Ngoei argues that anticommunist nationalism in Southeast Asia intersected with preexisting local antipathy toward China and the Chinese diaspora to usher the region from European-dominated colonialism to US hegemony. Central to this revisionary strategic assessment is the place of British power and the effects of direct neocolonial military might and less overt cultural influences based on decades of colonial rule, as well as the considerable influence of Southeast Asian actors upon Anglo-American imperial strategy throughout the post-war period. Arc of Containment demonstrates that American failure in Vietnam had less long-term consequences than widely believed because British pro-West nationalism had been firmly entrenched twenty-plus years earlier. In effect, Ngoei argues, the Cold War in Southeast Asia was but one violent chapter in the continuous history of western imperialism in the region in the twentieth century.
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