Search results for ""Author Rui Li""

Unfolding in the tense years of the Cultural Revolution (1966-1976), Trees Without Wind takes place in a remote Shanxi village in which a rare affliction has left the residents physically stunted. Director Liu, an older revolutionary and local commune head, becomes embroiled in a power struggle with Zhang Weiguo, a young ideologue who believes he is the model of a true revolutionary. Complicating matters is a woman named Nuanyu, who, like Zhang Weiguo and Director Liu, is an outsider untouched by the village's disease. "Wedded" to all of the male villagers, Nuanyu lives a polyandrous lifestyle based on necessity and at odds with the puritanical idealism of the Cultural Revolution. The deformed villagers, representing the manipulated masses of China, become pawns in the Party representatives' factional infighting. Director Liu and Zhang Weiguo's explosive tug-of-war is part of a larger battle among politics, self-interest, and passion gripping a world undone by ideological extremism. A collectively told narrative powered by distinctive subjectivities, Trees Without Wind is a milestone in the fictional treatment of a horrific event.

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Unfolding in the tense years of the Cultural Revolution (1966-1976), Trees Without Wind takes place in a remote Shanxi village in which a rare affliction has left the residents physically stunted. Director Liu, an older revolutionary and local commune head, becomes embroiled in a power struggle with Zhang Weiguo, a young ideologue who believes he is the model of a true revolutionary. Complicating matters is a woman named Nuanyu, who, like Zhang Weiguo and Director Liu, is an outsider untouched by the village's disease. "Wedded" to all of the male villagers, Nuanyu lives a polyandrous lifestyle based on necessity and at odds with the puritanical idealism of the Cultural Revolution. The deformed villagers, representing the manipulated masses of China, become pawns in the Party representatives' factional infighting. Director Liu and Zhang Weiguo's explosive tug-of-war is part of a larger battle among politics, self-interest, and passion gripping a world undone by ideological extremism. A collectively told narrative powered by distinctive subjectivities, Trees Without Wind is a milestone in the fictional treatment of a horrific event.

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This book will appeal to scientists and engineers who are concerned with the design of microwave wideband devices and systems. For advanced (ultra)-wideband wireless systems, the necessity and design methodology of wideband filters will be discussed with reference to the inherent limitation in fractional bandwidth of classical bandpass filters. Besides the detailed working principles, a large number of design examples are demonstrated, which can be easily followed and modified by the readers to achieve their own desired specifications. Therefore, this book is of interest not only to students and researchers from academia, but also to design engineers in industry. With the help of complete design procedures and tabulated design parameters, even those with little filter design experience, will find this book to be a useful design guideline and reference, which can free them from tedious computer-aided full-wave electromagnetic simulations. Among different design proposals, wideband bandpass filters based on the multi-mode resonator have demonstrated many unparalleled attractive features, including a simple design methodology, compact size, low loss and good linearity in the wide passband, enhanced out-of-band rejection, and easy integration with other circuits/antennas. A conventional bandpass filter works under single dominant resonant modes of a few cascaded transmission line resonators and its operating bandwidth is widened via enhanced coupling between the adjacent resonators. However, this traditional approach needs an extremely high coupling degree of coupled-lines while producing a narrow upper stopband between the dominant and harmonic bands. As a sequence, the desired dominant passband is restricted to an extent less than 60% in fractional bandwidth. To circumvent these issues and break with the tradition, a filter based on the multiple resonant modes was initially introduced in 2000 by the first author of this book. Based on this novel concept, a new class of wideband filters with fractional bandwidths larger than 60% has been successfully developed so far. This book, presents and characterizes a variety of multi-mode resonators with stepped-impedance or loaded-stub configurations using the matured transmission line theory for development of advanced microwave wideband filters.

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Soft-Switching Technology for Three-phase Power Electronics Converters Discover foundational and advanced topics in soft-switching technology, including ZVS three-phase conversion In Soft-Switching Technology for Three-phase Power Electronics Converters, an expert team of researchers delivers a comprehensive exploration of soft-switching three-phase converters for applications including renewable energy and distribution power systems, AC power sources, UPS, motor drives, battery chargers, and more. The authors begin with an introduction to the fundamentals of the technology, providing the basic knowledge necessary for readers to understand the following articles. The book goes on to discuss three-phase rectifiers and three-phase grid inverters. It offers prototypes and experiments of each type of technology. Finally, the authors describe the impact of silicon carbide devices on soft-switching three-phase converters, studying the improvement in efficiency and power density created via the introduction of silicon carbide devices. Throughout, the authors put a special focus on a family of zero-voltage switching (ZVS) three-phase converters and related pulse width modulation (PWM) schemes. The book also includes: A thorough introduction to soft-switching techniques, including the classification of soft-switching for three phase converter topologies, soft-switching types and a generic soft-switching pulse-width-modulation known as Edge-Aligned PWM A comprehensive exploration of classical soft-switching three-phase converters, including the switching of power semiconductor devices and DC and AC side resonance Practical discussions of ZVS space vector modulation for three-phase converters, including the three-phase converter commutation process In-depth examinations of three-phase rectifiers with compound active clamping circuits Perfect for researchers, scientists, professional engineers, and undergraduate and graduate students studying or working in power electronics, Soft-Switching Technology for Three-phase Power Electronics Converters is also a must-read resource for research and development engineers involved with the design and development of power electronics.

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