This paper puts forward a new MRACS method using low order model, i. e. the fourth order hydraulic servo system following the first order reference model.
本文把液压伺服系统作四阶系统，跟随一阶参考模型，提出了一种新的高阶对象和低阶模型的MRACS 的方法。
At present, SCORM (Sharable Content Object Reference Model) standard is the most authoritative one in the domain of E-Learning.
标准是目前数字学习领域中最具权威性的标准。
At present, SCORM (Sharable Content Object Reference Model) standard is the most authoritative one in the domain of E-Learning.
标准是目前数字学习领域中最具权威性的标准。
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