Perception of human beings has evolved from natural biosensor to powerful sensors and sensor networks. In sensor networks, trillions of devices are interconnected and sense a broad spectrum of contexts for human beings, laying the foundation of Internet of Things (IoT). However, sensor technologies have several limitations relating to deployment cost and usability, which render them unacceptable for practical use. Consequently, the pursuit of convenience in human perception necessitates a wireless, sensorless and contactless sensing paradigm. Recent decades have witnessed rapid developments in wireless sensing technologies, in which sensors detect wireless signals (such as acoustic, light, and radio frequency) originally designed for data transmission or lighting. By analyzing the signal measurements on the receiver end, channel characteristics can be obtained to convey the sensing results. Currently, significant effort is being devoted to employing the ambient Wi-Fi, RFID, Bluetooth, ZigBee, and television signals for smart wireless sensing, eliminating the need for dedicated sensors and promoting the prospect of the Artificial Intelligence of Things (AIoT). This book provides a comprehensive and in-depth discussion of wireless sensing technologies. Specifically, with a particular focus on Wi-Fi-based sensing for understanding human behavior, it adopts a top-down approach to introduce three key topics: human detection, localization, and activity recognition. Presenting the latest advances in smart wireless sensing based on an extensive review of state-of-the-art research, it promotes the further development of this area and also contributes to interdisciplinary research.

This book reflects up-to-date research, fundamental theories, and key techniques of of wireless localization technology and error-controlling techniques. It also presents and discusses the issue of localizability, as well as privacy issues associated with LBS. This book encompasses the significant and quickly growing area of wireless localization technology. It presents comprehensive and up-to-date research in both fundamental theories and key techniques of network localization. In addition to localization approaches, it also is the first book to address the issue of localizability. The privacy issue of LBS technology is also discussed.

This book mainly addresses the position, function, influence, and values of folk oral literature in the history of Chinese literature. Divided into 14 chapters, it systematically covers central aspects of folklore literature such as ballads, folk songs, Bianwen, Zajuci, Guzici, Zhugongdiao, Sanqu, Baojuan, Tanci, Zidishu, and so on from the Pre-Qin to the late Qing Dynasties, filling several gaps in literary history studies. It is a comprehensive literary work, and many of the materials cited here are rare and difficult to find. In addition, the book proposes some important theories, especially six highly generalized qualities of folk literature, namely that it is: popular, collective, oral, fresh, effusive, and innovative. With detailed, extensive materials, and quotations, the book represents the most systematic and comprehensive work to date on ancient Chinese folk literature. It is mutually complementary with Guowei Wang’s A Textual Research of the Traditional Chinese Opera in the Song and Yuan Dynasties and Xun Lu’s A Brief History of Chinese Fiction; all three works are regarded as the most essential classics for researching the history of Chinese literature.

Perception of human beings has evolved from natural biosensor to powerful sensors and sensor networks. In sensor networks, trillions of devices are interconnected and sense a broad spectrum of contexts for human beings, laying the foundation of Internet of Things (IoT). However, sensor technologies have several limitations relating to deployment cost and usability, which render them unacceptable for practical use. Consequently, the pursuit of convenience in human perception necessitates a wireless, sensorless and contactless sensing paradigm. Recent decades have witnessed rapid developments in wireless sensing technologies, in which sensors detect wireless signals (such as acoustic, light, and radio frequency) originally designed for data transmission or lighting. By analyzing the signal measurements on the receiver end, channel characteristics can be obtained to convey the sensing results. Currently, significant effort is being devoted to employing the ambient Wi-Fi, RFID, Bluetooth, ZigBee, and television signals for smart wireless sensing, eliminating the need for dedicated sensors and promoting the prospect of the Artificial Intelligence of Things (AIoT). This book provides a comprehensive and in-depth discussion of wireless sensing technologies. Specifically, with a particular focus on Wi-Fi-based sensing for understanding human behavior, it adopts a top-down approach to introduce three key topics: human detection, localization, and activity recognition. Presenting the latest advances in smart wireless sensing based on an extensive review of state-of-the-art research, it promotes the further development of this area and also contributes to interdisciplinary research.

This book mainly addresses the position, function, influence, and values of folk oral literature in the history of Chinese literature. Divided into 14 chapters, it systematically covers central aspects of folklore literature such as ballads, folk songs, Bianwen, Zajuci, Guzici, Zhugongdiao, Sanqu, Baojuan, Tanci, Zidishu, and so on from the Pre-Qin to the late Qing Dynasties, filling several gaps in literary history studies. It is a comprehensive literary work, and many of the materials cited here are rare and difficult to find. In addition, the book proposes some important theories, especially six highly generalized qualities of folk literature, namely that it is: popular, collective, oral, fresh, effusive, and innovative. With detailed, extensive materials, and quotations, the book represents the most systematic and comprehensive work to date on ancient Chinese folk literature. It is mutually complementary with Guowei Wang's A Textual Research of the Traditional Chinese Opera in the Song and Yuan Dynasties and Xun Lu's A Brief History of Chinese Fiction; all three works are regarded as the most essential classics for researching the history of Chinese literature.