利用流动显示和片光源技术对绕丁坝的流动结构在北航水槽中进行了研究.研究发现在丁坝的上游会形成马蹄涡,在丁坝的头部会形成卡门......

Underground tunneling is one of the alternative solutions to diminish traffic congestion in large cities. One of the mos......