摘要
探究网络环境下高校图书馆文献资源建设的模式,即在多元化的基础上重点建设数字文献,同时兼顾传统文献。
Traditional way to bring about reversible operation of direct-current motor is to provide electricity by two crystal shutter units.Hence,it not only increase the numker of transformer components,but also meet circulation problem With the feature of bidirectional conduction,it will bring about four-quadrant operation of DCmotor and eliminate circulation completely.
出处
《重庆工业高等专科学校学报》
2003年第2期125-126,共2页
Journal of Chongqing Polytechnic College
关键词
网络
图书馆
文献资源
建设
bidirectional Thyristor
trigger pulse
circulation
rectification
inversion.
