Cerebral hemorrhage model has been built for about 40 years, in which the method of establishing model and study direction have been changed greatly till now.
脑出血模型自建立至今已有近40年时间，模型制作方法及研究方向均有巨大的变化。
The paper introduces a method of establishing model using mark flow graph in sequence control system. Then the control is implemented by step-by-step instruments in PLC.
本文介绍了一种标识流图在顺序控制系统中建模方法，然后利用可编程序控制器中的步进指令实现控制。
By using the method of establishing model through vibration test, this paper discusses the rotatory shell's dry-humid mode parameters and its non-linear vibration properties.
本文用振动试验建模的方法来探索旋转壳体的干、湿模态参数及其非线性振动特性。
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