Bøger af Qiang Li

Ever since its invention in the 1980s, the compound semiconductor heterojunction-based high electron mobility transistor (HEMT) has been widely used in radio frequency (RF) applications. This book provides readers with broad coverage on techniques and new trends of HEMT, employing leading compound semiconductors, III-N and III-V materials. The content includes an overview of GaN HEMT device-scaling technologies and experimental research breakthroughs in fabricating various GaN MOSHEMT transistors. Readers are offered an inspiring example of monolithic integration of HEMT with LEDs, too. The authors compile the most relevant aspects of III-V HEMT, including the current status of state-of-art HEMTs, their possibility of replacing the Si CMOS transistor channel, and growth opportunities of III-V materials on an Si substrate. With detailed exploration and explanations, the book is a helpful source suitable for anyone learning about and working on compound semiconductor devices.

This book analyses the particular nature, characteristics and current conditions of urbanization in China. It reviews the theory of "urbanization with a diversified process" and puts forward the basic principles for promoting urbanization on the basis of a perspective reflecting the diversified sizes of towns and cities.

Presents the theories and applications of determining the position of an object in space through the use of satellites As the importance of space reconnaissance technology intensifies, more and more countries are investing money in building their own space reconnaissance satellites.