In order to provide the calculation method for the design of the sandwich panel structure,the three-dimensional finite element model of the sandwich panel structure of multi-layer elastic foundation i
当军用飞机使用民用机场时，研究民用机场净空区的障碍物风险性，通过对比分析军、民航的净空管理规定，首先民用机场的升降带、端净空区和侧净空区的范围应重新调整。根据障碍物在民用机场净空区的坐标位置，确定障碍物风险性的影响因素。基于军、民航净空规定的障碍物限制面，按照障碍物超过限制高度越多、端净空区障碍物距离跑道端越近、侧净空区障碍物距离跑道中线越近，风险性就越大的原则，建立风险影响值计算的线性分段模型。
In this paper,we study the influence of independent delay on propagated delay in the network and provide a propagated delay optimization model of aircraft routing for airlines to conduct delay pre-con
公路急弯陡坡路段是山区高速公路事故频发路段,所面临的交通安全形势非常严峻。为了完善公路及公路设施,改善公路急弯陡坡路段交通安全环境,减少交通事故,提升公路安全水平,本文从急弯陡坡路段事故致因原理出发,引入制动作用指数(Braking EffectIndex,BEI)的概念,将其作为评价公路急弯陡坡路段安全性的指标,建立了线形质量评价模型,并基于六轴货车试验进行了实例验证,分析了西南某高速连续长下坡
Large diameter bored pile(LDB pile)has been widely applied to high-rise buildings,bridges,and high-speed railways,due to its high bearing capacity and simple construction.
The vehicle comprehensive performance is attenuated by the special hypobaric hypoxia environment in high-altitude area.It also causes the plateau reaction of driver and makes driving operation behavio
隐蔽工程在公路工程或房建工程中极为常见，但由于其不可见性，一旦发生质量问题，会造成巨大损失，隐蔽工程的质量直接决定整个工程的质量，故在隐蔽工程施工过程中需对各个环节的施工质量进行严格控制和管理。
Increasing the percentages of Reclaimed SBS Modified Asphalt Pavement(RSMAP)is a promising way to promote the development of sustainable roadway systems,and the excellent properties are the key to the
Joints and fractured cracks provide passageways for waters penetration into pavement and subgrade,which are the main factors causing damages of jointed plain concrete pavement(JPCP).
为更快捷、使用更少沥青样品地评价沥青低温流变性能，美国提出了一种使用DSR动态剪切流变仪和4mm(或8mm)平行板夹具的新的试验方法，称为4mm DSR 试验。