An accessible account of the cultural history of Chinese gender relations and sexuality, from the Ming dynasty to the Chinese Communist Party A unique insight of the life experiences of female impersonators in traditional Chinese theatre An engaging analysis of the transformation of Chinese society through the lens of theatre and performing arts An urgent assessment of the ambiguous role of male players of female roles in contemporary China

The hard disk drive is one of the finest examples of the precision control of mechatronics, with tolerances less than one micrometer achieved while operating at high speed. Increasing demand for higher data density as well as disturbance-prone operating environments continue to test designers' mettle. Explore the challenges presented by modern hard disk drives and learn how to overcome them with Hard Disk Drive: Mechatronics and Control. Beginning with an overview of hard disk drive history, components, operating principles, and industry trends, the authors thoroughly examine the design and manufacturing challenges. They start with the head positioning servomechanism followed by the design of the actuator servo controller, the critical aspects of spindle motor control, and finally, the servo track writer, a critical technology in hard disk drive manufacturing. By comparing various design approaches for both single- and dual-stage servomechanisms, the book shows the relative pros and cons of each approach. Numerous examples and figures clarify and illustrate the discussion. Exploring practical issues such as models for plants, noise reduction, disturbances, and common problems with spindle motors, Hard Disk Drive: Mechatronics and Control avoids heavy theory in favor of providing hands-on insight into real issues facing designers every day.

With a rapidly growing economy and burgeoning populations, the world's scarce water resources, such as rivers and lakes, are seriously affected by pollution from the vast discharges of industrial and domestic wastewater, indiscriminate solid waste disposal and runoff from an agricultural sector characterized by excessive use of fertilizer and pesticides and large-scale livestock breeding. Therefore, these wastewaters must be treated before being discharged. The electrochemical method is an attractive alternative to other methods of wastewater treatment because of its environmental respectability and ease of operation. This book introduces the application of the electrochemical method for treatment of domestic and industrial wastewater.