This brief provides a comprehensive introduction on the flow-induced instabilities (e.g., the pressure fluctuations and the vibrations) of the reversible pump turbines (RPTs) in the pumped hydro energy storage power stations (PHSEPSs) in China based on long-term field tests. The pressure fluctuations and the vibrations of several RPTs in China under different operational conditions are analysed in detail to reveal their generation mechanisms and propagation characteristics. The book presents advanced signal analysis and processing methods which are used for obtaining the time-frequency information and for finding the internal correlations between several types of signals. Advanced artificial intelligence algorithms are adopted for understanding the effective fault diagnosis and the identification of different flow patterns. The book overviews the fundamentals of the RPTs and the signal analysis methods, while it demonstrates that the analysis results of the pressure fluctuation and vibration data may be employed for the calibration of numerical simulations and the comparisons of model tests. It is primarily targeted to researchers and engineers working on the fields of condition monitoring and fault diagnosis of hydraulic machineries.
Closely related to the frontier research field of “digital technology”, this book reshapes the planning and design process of landscape architecture from theoretical and practical levels. It gives a full-scale discussion to the logic, structure, method, and application of digital landscape architecture, leading this field to a new era of perception-quantification research mode. Readers will get a comprehensive understanding of digital landscape architecture, know about multiple digital methods for landscape planning and design, and learn a lot of practical projects with digital technology. And it will inspire the readers to think about new patterns and approaches to landscape planning, rather than traditional ways. This book is organized under a clear logic, which helps the readers easily get the core of the work. A lot of logic diagrams showing between the theoretical paragraphs highly summarize the key points of the book, providing a better readability and acceptability. This book also contains many detailed drawings and graphics for the project cases, which gives a good demonstration of how digital methods could be applied in practice.
Is China becoming the "workshop of the world" in the same way as Britain and the United States once were; or is China – as some multinational companies believe – simply a processing segment in global production networks? This book examines China’s role in the international division of labor: it analyzes the scale and scope of China’s manufacture; the type and relative sophistication of its exports in the world market; and its position in the global value chain. It shows that China monopolizes industrial production by being the processing center of world. Based on extensive original research, this book examines the structure of production in global manufacturing industries, applying both qualitative and quantitative methods. It analyzes each segment of the value chain, exploring in depth several specific industrial sectors. It concludes that China has become deeply integrated into global manufacturing industry; that China’s position in the value chain is still quite low, with relatively low research and development (R&D) and other similar high-value activities; but that, in some sectors, China is catching up rapidly, especially in newly emerging sectors.
This book discusses the issues surrounding race, ethnicity, and immigrant status in U.S. policing, with a special focus on immigrant groups’ perceptions of the police and factors that shape their attitudes toward the police. It focuses on the perceptions of three rapidly growing yet understudied ethnic groups – Hispanic/Latino, Chinese, and Arab Americans. Discussion of their perceptions of and experience with the police revolves around several central themes, including theoretical frameworks, historical developments, contemporary perceptions, and emerging challenges. This book appeals to those interested in or researching policing, race relations, and immigration in society, and to domestic and foreign government officials who carry law enforcement responsibilities and deal with citizens and immigrants in particular.
This brief provides a comprehensive introduction on the flow-induced instabilities (e.g., the pressure fluctuations and the vibrations) of the reversible pump turbines (RPTs) in the pumped hydro energy storage power stations (PHSEPSs) in China based on long-term field tests. The pressure fluctuations and the vibrations of several RPTs in China under different operational conditions are analysed in detail to reveal their generation mechanisms and propagation characteristics. The book presents advanced signal analysis and processing methods which are used for obtaining the time-frequency information and for finding the internal correlations between several types of signals. Advanced artificial intelligence algorithms are adopted for understanding the effective fault diagnosis and the identification of different flow patterns. The book overviews the fundamentals of the RPTs and the signal analysis methods, while it demonstrates that the analysis results of the pressure fluctuation and vibration data may be employed for the calibration of numerical simulations and the comparisons of model tests. It is primarily targeted to researchers and engineers working on the fields of condition monitoring and fault diagnosis of hydraulic machineries.
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