Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.

本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。

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Repetitive control is used to reduce voltage distortion under nonlinear loads and instantaneous feedback control is designed to quicken the dynamic response process under abrupt load variation.

系统利用重复控制抑制非线性负载下的电压畸变，利用瞬时值反馈控制加快负载突变时的动态响应过程。

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The dynamic examination of the venticulus sinister with ultrasound cardiographers by means of quantitative load showed that the Taijiquan group was significantly healthier than the control group.

通过定量负荷用超声心动仪实施动态检测左心室各项指标， 表明太极拳组明显由于对照组。

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