【摘要】 本文对铁路定线CAD系统开发的原理进行了介绍。在我们这一系统中,既可人机交互设计、修改线路平面,又可以工程费为目标函数自动修改线路平、纵面。本文对开发这一系统的重要技术:快速动画技术及工程费目标函数的导数的求法进行了详细介绍。更多还原

【Abstract】 The principles of developing a railway location CAD system are discussed.In the system not only the alignments of horizontal plan can be designed oramended through a man-machine interface, but also the horzontal andvertical alignments can be improved automatically by minimzing theobjective function of construction cost. The important techniques, fastgraphics animation and the derivation of objective function of constructioncost, of the system are presented in detail.更多还原