近年来随着微波通讯技术与微波集成电路(microwave integratecircuits,MICs)的发展,用于移动通讯、智能运输系统(Intelligent transport system,ITS)、GPS天线的低介电常数低介电损耗的微波介质陶瓷引起了广泛的关注,其中最具代表性的即...近年来随着微波通讯技术与微波集成电路(microwave integratecircuits,MICs)的发展,用于移动通讯、智能运输系统(Intelligent transport system,ITS)、GPS天线的低介电常数低介电损耗的微波介质陶瓷引起了广泛的关注,其中最具代表性的即为Al2O3陶瓷。本文总结了近几年Al2O3陶瓷微波介电性能的研究情况,系统介绍了Al2O3陶瓷微波介电性能的影响因素和目前研究的Al2O3陶瓷体系,希望对于研究AlO陶瓷的微波介电性能提供有益的参考,使其在微波通讯等方面得到更广泛的应用。展开更多
Using the F-expansion method we present analytical matter-wave solutions to Bose-Einstein condensates with two- and three-body interactions through the generalized three-dimensional Gross-Pitaevskii equation with time...Using the F-expansion method we present analytical matter-wave solutions to Bose-Einstein condensates with two- and three-body interactions through the generalized three-dimensional Gross-Pitaevskii equation with time- dependent coefficients, for the periodically time-varying interactions and quadratic potential strength. Such solutions exist under certain conditions, and impose constraints on the functions describing potential strength, nonlinearities, and gain (loss). Various shapes of analytical matter-wave solutions which have important applications of physical interest are s^udied in details.展开更多
文摘近年来随着微波通讯技术与微波集成电路(microwave integratecircuits,MICs)的发展,用于移动通讯、智能运输系统(Intelligent transport system,ITS)、GPS天线的低介电常数低介电损耗的微波介质陶瓷引起了广泛的关注,其中最具代表性的即为Al2O3陶瓷。本文总结了近几年Al2O3陶瓷微波介电性能的研究情况,系统介绍了Al2O3陶瓷微波介电性能的影响因素和目前研究的Al2O3陶瓷体系,希望对于研究AlO陶瓷的微波介电性能提供有益的参考,使其在微波通讯等方面得到更广泛的应用。
基金Supported by the National Natural Science Foundation of China under Grant No.11105057the Foundation of Hubei University of Education under Grant No.2009B013the Project of Excellent Teacher Team of Hubei University of Education under Grant No.2012KB302
文摘Using the F-expansion method we present analytical matter-wave solutions to Bose-Einstein condensates with two- and three-body interactions through the generalized three-dimensional Gross-Pitaevskii equation with time- dependent coefficients, for the periodically time-varying interactions and quadratic potential strength. Such solutions exist under certain conditions, and impose constraints on the functions describing potential strength, nonlinearities, and gain (loss). Various shapes of analytical matter-wave solutions which have important applications of physical interest are s^udied in details.