Keywords: geometric nonlinearity, sag effect, equivalent modulus of elasticity, vehicle - bridge interaction.关键词: 几何非线性 、 中垂效应 、 等效弹性系数 、 车桥互制.The eigenfrequency of oscillation cavity is the function of cavity's geo...
There is only one thing that makes a dream impossible to achieve: the fear of failure.--Paulo Coelho世界上只有一样东西可以阻止梦想实现，那就是害怕失败。In Sao Paulo , a baby boy is chortling away , unaware that a court isdeciding his fate.据英国《卫报》...