本文采用了近代控制理论常用的状态变量法研究了反应式步进电动机动特性及其最佳控制。
This paper deals with the research of dynamic characterises and optimal control of VR step motor with the state variable method in modern control theory.
虽然近代湖南社会控制作用比较突出，但作为一个区域性的研究课题还没有得到系统的整理。
Although the social control in modern Hunan function is more outstanding, the research topic that be a local area have not studied commendably.
通常认为近代自然科学的产生使得人类开始控制自然、征服自然。
It was usually said that the emergence of modern science makes Man to control, to conquer the Nature.
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