兰渝铁路货物运量分析

从西部地区的资源、产业布局、沿线的社会经济特点等方面对兰渝铁路区域货运量进行了综合分析,并根据区域经济发展规划,结合铁路运量历史变化趋势和发展规划对川渝地区与西北地区的货物交流分年度进行了预测,并对线路沿线的地方货运量进行了预测,为论证兰渝铁路的修建提供了强有力的依据。

沿边铁路汤旺河至富锦段货运量的分析与研究

本文分析了沿边铁路汤旺河至富锦段货运量由沿线地方运量与通过运量两部分组成,品类主要为矿石、粮食、木材等。本文通过对本线货运量的分析,预测了本线区段的货流密度。

Application of Interval Newton Method to Solve Nonlinear Equations and Global Optimization

The basic principle of interval arithmetic and the basic algorithm of the interval Newton methods are introduced.The prototype algorithm can not find any zero in an interval that has zero sometimes,that is,it is instable.So the prototype relaxation procedure is improved in this paper.Additionally,an immediate test of the existence of a solution following branch_and_bound is proposed,which avoids unwanted computations in those intervals that have no solution.The numerical results demonstrat that the improved interval Newton method is superior to prototype algorithm in terms of solution quality,stability and convergent speed.