The reason to set up a cargo joint venture is the current lack of a direct service to provide more cost-effective and powerful local airlines in Shanghai.
之所以要成立合资货运公司，是由于目前上海缺乏一家能直接提供更具成本效益及优质服务的强大本土航空公司。
The numeral timing systems driven by PWM are set up for the direct current servo motor model by using the PI. and IP contrail ers respectively.
本文分别用PI控制器和IP控制器对直流伺服电机模型建立PWM驱动数字型调速系统。
It must be set up suitable quiescent point in order to works in linear region. This decides that the analysis of amplifier includes direct current analysis and alternating current analysis.
要用他对信号进行不失真地放大，必须设置适当的工作点，使电子器件工作在近似线性区域，这就决定了放大器的分析包括直流分析和交流分析。
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