Control of Surge in Centrifugal Compressors by Active Magnetic Bearings

Control of Surge in Centrifugal Compressors by Active Magnetic Bearings

Surge Control of Active-magnetic-bearing-suspended Centrifugal Compressors sets out the fundamentals of integrating active magnetic bearing (AMB) rotor suspension technology in compressor systems, and describes how this relatively new bearing technology can be employed in active control of compressor surge initiation. The authors provide a self-contained and comprehensive review of rotordynamics and the fundamentals of AMB technology. The active stabilization of compressor surge employing AMBs in a machine is fully explored, from modeling of instability and controller design, to the implementation and experimental testing of the control algorithm in a specially-constructed, industrial-size centrifugal compression system. The results of these tests demonstrate the great potential of the new surge control method suggested in this text. This book will be useful for engineers in industries that involve turbocompressors and magnetic bearings, as well as for researchers and graduate students in the field of applied control. Whatever their level of experience, engineers working in the fields of turbomachinery, magnetic bearings, rotordynamics and controls will find the material in this book absorbing as all these important aspects of engineering are integrated to create a multi-disciplinary solution to a real-life industrial problem and the book is a suitable introduction to the area for newcomers.

Control of Surge in Centrifugal Compressors by Active Magnetic Bearings

Numerical Methods for Controlled Stochastic Delay Systems

Numerical Methods for Controlled Stochastic Delay Systems

The Markov chain approximation methods are widely used for the numerical solution of nonlinear stochastic control problems in continuous time. This book extends the methods to stochastic systems with delays. Because such problems are infinite-dimensional, many new issues arise in getting good numerical approximations and in the convergence proofs. Useful forms of numerical algorithms and system approximations are developed in this work, and the convergence proofs are given. All of the usual cost functions are treated as well as singular and impulsive controls. A major concern is on representations and approximations that use minimal memory. Featuring numerical algorithms and examples with applications to control and modern communications systems, this book is the first on the subject and will be of great interest to all those who work with stochastic delay equations and whose main interest is in either the use of the algorithms or in the underlying mathematics. An excellent resource for graduate students, researchers, and practitioners, the work may be used as a graduate-level textbook for a special topics course or seminar on numerical methods in stochastic control.

Numerical Methods for Controlled Stochastic Delay Systems

Trustworthy Ubiquitous Computing

Trustworthy Ubiquitous Computing

Trustworthy Ubiquitous Computing covers aspects of trust in ubiquitous computing environments. The aspects of context, privacy, reliability, usability and user experience related to emerged and exciting new computing paradigm of Ubiquitous Computing, includes pervasive, grid, and peer-to-peer computing including sensor networks to provide secure computing and communication services at anytime and anywhere. Marc Weiser presented his vision of disappearing and ubiquitous computing more than 15 years ago. The big picture of the computer introduced into our environment was a big innovation and the starting point for various areas of research. In order to totally adopt the idea of ubiquitous computing several houses were build, equipped with technology and used as laboratory in order to find and test appliances that are useful and could be made available in our everyday life. Within the last years industry picked up the idea of integrating ubiquitous computing and already available products like remote controls for your house were developed and brought to the market. In spite of many applications and projects in the area of ubiquitous and pervasive computing the success is still far away. One of the main reasons is the lack of acceptance of and confidence in this technology. Although researchers and industry are working in all of these areas a forum to elaborate security, reliability and privacy issues, that resolve in trustworthy interfaces and computing environments for people interacting within these ubiquitous environments is important. The user experience factor of trust thus becomes a crucial issue for the success of a UbiComp application. The goal of this book is to provide a state the art of Trustworthy Ubiquitous Computing to address recent research results and to present and discuss the ideas, theories, technologies, systems, tools, applications and experiences on all theoretical and practical issues.

Trustworthy Ubiquitous Computing

71st Conference on Glass Problems

71st Conference on Glass Problems

This issue contains a collection of papers presented at the 71st Conference on Glass Problems, October 19-20, 2010 at The Ohio State University, Columbus, Ohio. Topics include glass melting; glass science, defects; safety; refractories; recycling; controls; and raw materials.

71st Conference on Glass Problems

Determination of Anions in Natural and Treated Waters

Determination of Anions in Natural and Treated Waters

As environmental controls are lagging behind industrial development, metals are an increasing hazard to humans, animal and plant life. Bioaccumulation of metals through the food chain creates a serious impact on public health yet analytical techniques for detecting the often low concentrations of contaminants are poorly understood.

Determination of Anions in Natural and Treated Waters

The Myc Gene

The Myc Gene

Myc controls multiple cellular functions, including cell proliferation, growth, differentiation and death, both directly and indirectly, through its modulation of downstream transcriptional programs. In The Myc Gene: Methods and Protocols, experts in the field summarize the standard and novel techniques that allow the studying of Myc mechanism of action in normal and cancer cells, in vitro and in vivo, in one succinct manual. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and key tips on troubleshooting and avoiding known pitfalls.

The Myc Gene

Climbing and Walking Robots

Climbing and Walking Robots

Nowadays robotics is one of the most dynamic fields of scientific researches. The shift of robotics researches from manufacturing to services applications is clear. During the last decades interest in studying climbing and walking robots has been increased. This increasing interest has been in many areas that most important ones of them are: mechanics, electronics, medical engineering, cybernetics, controls, and computers. Todays climbing and walking robots are a combination of manipulative, perceptive, communicative, and cognitive abilities and they are capable of performing many tasks in industrial and non- industrial environments. Surveillance, planetary exploration, emergence rescue operations, reconnaissance, petrochemical applications, construction, entertainment, personal services, intervention in severe environments, transportation, medical and etc are some applications from a very diverse application fields of climbing and walking robots. By great progress in this area of robotics it is anticipated that next generation climbing and walking robots will enhance lives and will change the way the human works, thinks and makes decisions. This book presents the state of the art achievments, recent developments, applications and future challenges of climbing and walking robots. These are presented in 24 chapters by authors throughtot the world The book serves as a reference especially for the researchers who are interested in mobile robots. It also is useful for industrial engineers and graduate students in advanced study.

Climbing and Walking Robots

Power System Oscillations

Power System Oscillations

Power System Oscillations deals with the analysis and control of low frequency oscillations in the 0.2-3 Hz range, which are a characteristic of interconnected power systems. Small variations in system load excite the oscillations, which must be damped effectively to maintain secure and stable system operation. No warning is given for the occurrence of growing oscillations caused by oscillatory instability, since a change in the system’s operating condition may cause the transition from stable to unstable. If not limited by nonlinearities, unstable oscillations may lead to rapid system collapse. Thus, it is difficult for operators to intervene manually to restore the system’s stability. It follows that it is important to analyze a system’s oscillatory behavior in order to understand the system’s limits. If the limits imposed by oscillatory instability are too low, they may be increased by the installation of special stabilizing controls.

Power System Oscillations

Microsoft SharePoint 2013 Developer Reference

Microsoft SharePoint 2013 Developer Reference

Develop your business collaboration solutions quickly and effectively with the rich set of tools, classes, libraries, and controls available in , , 2013. With this practical reference, enterprise-development expert Paolo Pialorsi shows you how to extend and customize the SharePoint environment – and helps you sharpen your development skills. Ideal for , developers with Microsoft .NET and C# knowledge.

Microsoft SharePoint 2013 Developer Reference

Beginning Ajax with ASP.NET

Beginning Ajax with ASP.NET

Following an exploration of how , works with .NET, you’ll get acquainted with DHTML, the role of , and the Document Object Model, and the XMLHttpRequest Object, which is the foundation of Ajax. Then you will examine the Ajax-type features built into , and explore the Ajax.NET Professional Library in detail. Finally, you will explore client scripting as well as building and using controls with Microsoft’s Atlas. With an entire chapter devoted to debugging, you will have all you need to use this cutting-edge technology.

Beginning Ajax with ASP.NET