An automatic accident detection method based on traffic flow parameters will be accessed, through simulating the physical environment of urban tunnel with traffic simulation software VISSIM.
采用VISSIM交通仿真软件，对城市隧道内的物理环境进行仿真，可设计出一种基于交通流参数的交通事故自动检测方法。
Using the analogy simulation, an experimental study of physical simulation about semisolid slurry's out flow from the stirring crucible and the filling state of the die chamber is carried out.
利用相似模拟的方法，进行了半固态浆料自搅拌坩埚的出流及压室充填状况的物理模拟实验研究。
The flow pattern of molten steel in tundish of the 6-strand bloom caster at PZH steel were investigated by physical simulation with isothermal and non-isothermal model.
针对攀钢六流大方坯连铸中间包，采用等温和非等温物理模拟的研究方法，研究了钢水在中间包内的流动规律。
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