Bøger af Yan Li

This book includes six chapters on wind turbine icing. For wind turbines operating in cold regions, icing often occurs on blade surfaces in winter. This ice accretion can change the aerodynamic shape of the blade airfoil, causing performance degradation and loss of power generation, even leading to operational accidents. This book focuses on the recent research progress on wind turbine icing. Chapters address such topics as the effect of icing conditions on the icing distribution characteristics of a blade airfoil for vertical-axis wind turbines, power loss estimation in wind turbines due to icing, wind turbine icing prediction methods, especially those using machine learning, the icing process of a single water droplet on a cold aluminum plate surface, the main theories of the icing adhesive mechanism, and theoretical and experimental studies on the ultrasonic de-icing method for wind turbine blades. This book is a valuable reference for researchers and engineers engaged in wind turbine icing and anti-icing research.

This book focuses on the multifaceted reality of social and health constraints and health services access among migrants in China, by originally exploring the social strata, social networks, and the understanding of health and health services among migrants. Furthermore, this book investigates the health constraints and health services access of rural-urban migrants in the absence of equal social protection by the government. It argues that the main obstacles to access health services are not only the shortage of financial resources among rural-urban migrants, but also lie in the institutional blindness regarding health security provision, rural-urban dualism and the household registration system in China. The book highlights the key function that social networks play in health and health services access among migrants in China, which has rarely been discussed in previous studies. And it also discusses the understanding of health among migrants, and further analyses that althoughmany migrants have not formed proper understanding of the connotation of health and have limited knowledge of health, prime responsibility should not be put on the migrants because their poor understanding of health mainly results from their rural perspective while health and health services access depend on the social-economic environment in which they live and work.This book would be of interest to people in migration studies, social exclusion and social welfare studies and to people interested in rural-urban migration and health in China.

This book constitutes the refereed proceedings of the 12th International Conference on Health Information Science, HIS 2023, held in Melbourne, VIC, Australia, during October 23¿24, 2023.The 20 full papers and 9 short papers included in this book were carefully reviewed and selected from 54 submissions. They were organized in topical sections as follows: Depression & Mental Health, Data Security, Privacy & Healthcare Systems, Neurological & Cognitive Disease Studies, COVID-19 Impact Studies, Advanced Medical Data & AI Techniques, Predictive Analysis & Disease Recognition, Medical Imaging & Dataset Exploration, Elderly Care and Knowledge Systems.

From the beginning, the debate on the likely results of the proposed acquisition of T-Mobile USA by AT&T focused more on the claims of the parties that "immense" merger efficiencies would overwhelm any apparent losses of competition than on the presence or absence of those losses, and the factors that might affect them, such as market definition. The companies based their "economic model" of the merger on estimates of efficiencies on AT&T's "engineering model," without addressing the credibility of the results of the latter in the context of the economics literature on the telecommunications sector. In this paper we first argue that the economics literature on economies of scale (especially) and economies of density in mobile telephony suggests caution in expecting such massive cost reductions from increasing the size of an already very large firm. We then present new econometric evidence from an international data base supporting the notion that most large mobile telephone service providers have reached the point of constant or even (rarely) declining returns to scale.

Rotating machines are some of the most widely used machines and their application in the field of new and renewable energy is an important development. This book presents recent research and discusses the technological development of rotating machines, including different types of wind, pump, and gas turbines. It also examines environmental impacts on rotating machines, particularly the effects of icing on the surface of wind turbine blades. It includes research on static and dynamic structural analysis, rotor aerodynamics characteristics, signal analysis, energy conversion, and exergy. It also presents the latest research on theoretical analysis, numerical simulation, and experiment technology for improving the performance and optimizing the structure of rotating machines.

This book comprehensively and systematically introduces the microstructure characteristics of plant fibers and the manufacturing process, interface characteristics, mechanical behaviors and physical properties of plant fiber reinforced composites, as well as their engineering demonstration applications. Plant fibers derived from natural resources have been thrust into the global spotlight as environment-friendly materials with attractive advantages of renewability, biodegradability, high specific strength and modulus and good sound absorption and heat insulation performance, and have become promising alternative to traditional synthetic fibers in making fiber-reinforced composites with structure-function integration. This book combines the basic theory with engineering applications for highlighting the unique research method for plant fiber reinforced composites with hierarchical structure. It is intended for undergraduate and graduate students who are interested in natural fiber composites, and scientific researchers and engineers looking to develop the design and manufacture of green composites in the fields of aerospace, railway transportation vehicles, automotive engineering and civil infrastructures.

This textbook provides students with an overview of cyber-physical microgrid networks and an in-depth introduction to photovoltaics, batteries, flywheel, supercapacitor, micro-turbines, wind generation, power-electronic interfaces, modeling and stability analysis of microgrids, and cyber-communication networks and security.

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This book presents advanced methodologies in two areas related to electroencephalogram (EEG) signals: detection of epileptic seizures and identification of mental states in brain computer interface (BCI) systems.

This book is among the first to theoretically and empirically examine what and how Western expatriate managers learn and develop from their international assignments in China. The book draws on literature associated with expatriate studies, experiential learning theory, and knowledge acquisition to develop an expatriate learning process model.

Fully Tuned Radial Basis Function Neural Networks for Flight Control presents the use of the Radial Basis Function (RBF) neural networks for adaptive control of nonlinear systems with emphasis on flight control applications.

Fully Tuned Radial Basis Function Neural Networks for Flight Control presents the use of the Radial Basis Function (RBF) neural networks for adaptive control of nonlinear systems with emphasis on flight control applications.