为了研究行人碰撞事故中人体下肢的生物力学响应和损伤机理，建立了一个人体下肢有限元模型。
In this paper, the failure mechanism and control technology of fretting fatigue have been studied by means of fatigue testing and finite element analysis.
这包括运行轨道要高于或低于现有铁路以避免平交道，与其他区域隔离以免与行人、动物、公路车辆碰撞。
This includes running tracks above or below roadways to avoid railroad crossings and fencing off areas to avoid collisions with animals, people and road vehicles.
在它狭窄弯曲的小巷里(其实是早年铁路线的遗迹)，电动推车和行人屡屡发生碰撞事件，几乎每天都需要叫救护车。
There are frequent collisions between motorised carts and pedestrians in its narrow, curving alleyways, the vestige of a former railway line; an ambulance needs to be called almost every day.
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