宁波市公路网合理发展规模研究

文章采用国土系数模型、生长曲线模型和相关分析及趋势线拟合法来确定宁波市的公路网总里程；采用最大通行能力模型和最小费用优化模型来确定宁波市的公路网等级结构。经综合分析比较后得出宁波市公路网的合理发展规模。     

Optimality Conditions for Generalized Static Programming with Convexity

The definitions of generalized pseudoconvex,generalized quasiconvex and its strictly generalized convexity were presented for the static programming at locally star-shaped set using the concept of right-upper derivative and the concept of sublinear. The sufficient and necessary conditions of the static programming were derived in terms of a generalized Lemmain this paper. The results obtained are useful for the further study on the duality of static programming and cover many already known conditions.     

计算机编制复线实用货物列车运行图的整数规划模型及求解方法

为了克服计算机编制上区段列车运行图存在的不足，把编图研究从单区段推进到由多个区段组成的某段或整条一路，并结合枢纽条件进行，已成为一个迫切需要研究解决的课题，本文首先对复线货物列车运行图进行了数学描述，接着阐述了求解该问题的算法和步骤，最后给出了实际应用的几个例子。