Yuan Gao

This book provides comprehensive technical information on SiC power devices from multiple perspectives, covering topics from device research and development to system applications. Chapters 1 to 4 focus on the characteristics of SiC devices, initially outlining the limitations of Si power devices and explaining why SiC has superior properties at the material level. It then offers updates on the latest developments in the SiC industry chain and products innovations, along with a detailed discussion of the characteristics and specifications of SiC Diodes and MOSFETs. Chapters 5 and 6 zoom in on SiC device testing and evaluation techniques, including CP testing, FT testing, system application testing, reliability assessment, failure analysis, and double-pulse testing. Chapters 7 to 12 focus on SiC device application technology, addressing common challenges in real applications and providing solutions. This includes voltage spikes during turn-off, crosstalk, common-mode current, common-source inductance, and driver circuits, concluding with case studies of SiC device applications in various scenarios. The book can serve as a textbook for higher education and vocational training, as well as a reference material for engineers in the power semiconductor and electrical electronics industries. To make the book genuinely helpful for readers, the authors have invested significant effort in content and data selection. First, the chosen technical points come from real-world requirements in device R&D and applications. Second, the book emphasizes practicality while integrating cutting-edge developments, detailing research outcomes with industrial potential. Third, the book offers a wealth of data and waveforms, most of which are actual measurements, to bridge the gap between theory and practice. Lastly, extensive further reading materials are provided at the end of each chapter for broader and deeper exploration.

This book provides a concise and comprehensive introduction to several basic methods with more attention to their theoretical basis and applications in fluid dynamics. Furthermore, some new ideas are presented in this book, for example, a method to solve the transition matrix by difference operator transformation. For this method, the book gives the definition of Fourier integral transformation of translation operator, and proves the transition matrix equaling to the differential operator transformation, so that it is extended to general situations of explicit, implicit, multi-layer difference equations, etc. This flexible approach is also used in the differential part. In addition, the book also includes six types of equivalent stability definitions in two ways and deeply analyzes their errors, stabilities and convergences of the difference equations. What is more important, some new scientific contributions on lattice Boltzmann method (LBM) in recent years are presented in the book as well. The authors write the book combining their ten years teaching experience and research results and this book is intended for graduate students who are interested in the area of computational fluid dynamics (CFD). Authors list some new research achievements, such as simplified lattice Boltzmann method, the simplified lattice Boltzmann flux solver and discrete unified gas kinetic scheme, and expect that this new information could give readers possible further investigating ideas in their future research on CFD area.

This book provides a concise and comprehensive introduction to several basic methods with more attention to their theoretical basis and applications in fluid dynamics. Furthermore, some new ideas are presented in this book, for example, a method to solve the transition matrix by difference operator transformation. For this method, the book gives the definition of Fourier integral transformation of translation operator, and proves the transition matrix equaling to the differential operator transformation, so that it is extended to general situations of explicit, implicit, multi-layer difference equations, etc. This flexible approach is also used in the differential part. In addition, the book also includes six types of equivalent stability definitions in two ways and deeply analyzes their errors, stabilities and convergences of the difference equations. What is more important, some new scientific contributions on lattice Boltzmann method (LBM) in recent years are presented in the book as well. The authors write the book combining their ten years teaching experience and research results and this book is intended for graduate students who are interested in the area of computational fluid dynamics (CFD). Authors list some new research achievements, such as simplified lattice Boltzmann method, the simplified lattice Boltzmann flux solver and discrete unified gas kinetic scheme, and expect that this new information could give readers possible further investigating ideas in their future research on CFD area.

Vibration assisted machining is becoming a potential machining process for difficult-to-cut materials in aerospace and biomedical applications. This book presents the fundamentals, modelling and applications of vibration assisted machining process. It provides investigations on cutting forces, temperature, cutting stability, surface topography, microstructure evolution and tool wear in vibration assisted machining. Three representative regimes (i.e., ultrasonically assisted machining, modulation assisted machining and elliptical vibration machining) are investigated in this book. The systematic and in-depth research in this process will provide important theoretical and practical reference for researchers and engineers in relative fields.

Vibration assisted machining is becoming a potential machining process for difficult-to-cut materials in aerospace and biomedical applications. This book presents the fundamentals, modelling and applications of vibration assisted machining process. It provides investigations on cutting forces, temperature, cutting stability, surface topography, microstructure evolution and tool wear in vibration assisted machining. Three representative regimes (i.e., ultrasonically assisted machining, modulation assisted machining and elliptical vibration machining) are investigated in this book. The systematic and in-depth research in this process will provide important theoretical and practical reference for researchers and engineers in relative fields.

This book presents the first systematic study of Augustine's insights into passions as well as his approach to the therapy of emotions and their sanctification. Analysing various phases of Augustine's writings, this work explores the systematic structure of Augustine's tenets on emotions and on freedom from passions. The general context is Augustine's philosophical and theological convictions on the issue of amor sui and amor Dei. Based upon a detailed analysis of original Latin texts and a critical examination of recent research, the author demonstrates how the language and conception of passions are tightly linked with Augustine's developing views of the philosophical paradigm of emotions and his later theological disputes with schismatics and heretics. In offering a comprehensive account of freedom from passions in Augustine's theological anthropology, this book makes a creative contribution to his understanding of the moral psychology of passions in social and political dimensions and the idea of the deification of emotions.

Born Red is an artistically wrought personal account, written very much from inside the experience, of the years 1966-1969, when the author was a young teenager at middle school. It was in the middle schools that much of the fury of the Cultural Revolution and Red Guard movement was spent, and Gao was caught up in very dramatic events, which he recounts as he understood them at the time. Gao's father was a county political official who was in and out of trouble during those years, and the intense interplay between father and son and the differing perceptions and impact of the Cultural Revolution for the two generations provide both an unusual perspective and some extraordinary moving moments. He also makes deft use of traditional mythology and proverbial wisdom to link, sometimes ironically, past and present. Gao relates in vivid fashion how students-turned-Red Guards held mass rallies against 'capitalist roader' teachers and administrators, marching them through the streets to the accompaniment of chants and jeers and driving some of them to suicide. Eventually the students divided into two factions, and school and town became armed camps. Gao tells of the exhilaration that he and his comrades experienced at their initial victories, of their deepening disillusionment as they utter defeat as the tumultuous first phase of the Cultural Revolution came to a close. The portraits of the persons to whom Gao introduces us - classmates, teachers, family members - gain weight and density as the story unfolds, so that in the end we see how they all became victims of the dynamics of a mass movement out of control.