指数分布的两个不等式

本文补充了文献［３］、［４］的结果，给出指数分布的两个新的性质．     

抽样调查的设计与分析(Ⅰ)

本文讨论抽样调查实践中有关设计和数据分析的若干问题．第一部分主要涉及设计问题．     

一个可靠机器,一个不可靠机器和一个缓冲库构成的系统的定性分析

本文用纯分析的方法给出了一个可靠机器 ,一个不可靠机器和一个缓冲库构成的系统解的存在唯一性证明     

桉树扦插育苗正交试验设计分析

根据扦插育苗试验表明，影响泰国赤桉苗高、根长及发根数的主要因素各不相同。综合分析表明：其主要因素是ＢＡ浓度，插条浸泡药液的时间和蔗糖浓度，其较优的插条处理方法是将插条在０．６％蔗糖＋３００ＰＰｍＩＢＡ溶液中浸泡２小时     

Min-cut clustering

We describe a decomposition framework and a column generation scheme for solving a min-cut clustering problem. The subproblem to generate additional columns is itself an NP-hard mixed integer programming problem. We discuss strong valid inequalities for the subproblem and describe some efficient solution strategies. Computational results on compiler construction problems are reported.This paper is dedicated to Phil Wolfe on the occasion of his 65th birthday.This research was supported by NSF grants DMS-8719128 and DDM-9115768, and by an IBM grant to the Computational Optimization Center, Georgia Institute of Technology.     

Suzuki群Sz(q)与2-(v,k,1)区组设计

§ 1　IntroductionA2 -( v,k,1 ) design D=( Ω,B) is a system consisting of a finite setΩ ofv points anda collection Bofk-subsets ofΩ ,called blocks,such thatany 2 -subsetofΩ is contained inexactly one block.We shall always assume that2 相似文献   

平面波导型对称星型耦合器的优化设计

通过有限差分波束传播法(FD-BPM)研究了N×N平面波导型星型耦合器的优化设计思想和方法,并通过17×17星型耦合器的模拟设计证明了它的可行性.给出了在输出端引入辅助波导的方法,以提高输出波导阵列的均匀性.并通过模拟计算,分析了圆心缩入程度和锥形区的形状对输出结果的影响.此法也同样适合于N值更大的星型耦合器.     

Determination of the number and locations of time points in transit schedule design — Case of a single run

An analytical model for the determination of the number and locations of time points as well as the amount of slack times in transit schedule design is developed. The model considers a bus route with a special passenger demand pattern in which all boarding passengers coordinate their arrivals at each stop in such a way that they never miss their intended bus, and therefore designing the schedule separately a single run at a time, becomes possible. The model employs the dynamic programming method to deal with the trade-offs among various cost components associated with the schedule quantitatively, and yet is flexible enough to incorporate the existing rules of thumb as well as transit operators' policies. Numerical examples that illustrate the applications of the model are given. The model, although not quite applicable to bus routes with general passenger demand patterns, is useful in the analysis of the contributing factors to the design of an economical, reliable, and operational transit schedule, and is likely to be adaptable for more realistic cases.     

改进的非线性整数规划算法

通过对LUUS随机搜索算法的分析，本文首次提出了一种改进的随机定向搜索法（MRDISA）通过实例计算，说明该算法的优点是最优解的可靠性不受初始值X^(0)和初始搜索范围R^(0)的影响，并可用于求解高维约束非线性整数规划问题。     

吡啶－热天平法测定催化剂固体总酸度

本文提出氨气吹扫，加热处理试样，正交设计法确定最佳工作条件，用吡啶－热天平法测定催化剂表面总酸度，获得了比较满意的结果，相对标准偏差＜３％。