Continuous approximation schemes for stochastic programs

One of the main methods for solving stochastic programs is approximation by discretizing the probability distribution. However, discretization may lose differentiability of expectational functionals. The complexity of discrete approximation schemes also increases exponentially as the dimension of the random vector increases. On the other hand, stochastic methods can solve stochastic programs with larger dimensions but their convergence is in the sense of probability one. In this paper, we study the differentiability property of stochastic two-stage programs and discuss continuous approximation methods for stochastic programs. We present several ways to calculate and estimate this derivative. We then design several continuous approximation schemes and study their convergence behavior and implementation. The methods include several types of truncation approximation, lower dimensional approximation and limited basis approximation.His work is supported by Office of Naval Research Grant N0014-86-K-0628 and the National Science Foundation under Grant ECS-8815101 and DDM-9215921.His work is supported by the Australian Research Council.     

高校图书馆“学科馆员”制度的建立与馆员继续教育

针对目前高校图书馆高贵质人才匮乏的现状，论述了高校图书馆“学科馆员”制度建立的必然性及对“学科馆员”的高贵质要求，指出馆员的继续教育是培养“学科馆员”的主要人才保障，提出了“学科馆员”继续教育的内容及方式。     

UNIFORM CONVERGENCE OF CESARO MEANS OF NEGATIVE ORDER OF DOUBLE TRIGONOMETRIC FOURIER SERIES

In this paper we prove that iff ∈ C([-π,π]2) and the function f is bounded partial p-variation for some p ∈ [1, ∞), then the double trigonometric Fourier series of a function f is uniformly (C;-α,-β) summable (α β＜ 1/p,α,β＞ 0) in the sense of Pringsheim. If α β≥ 1/p, then there exists a continuous function f0 of bounded partial double trigonometric Fourier series of fo diverge over cubes.     

造价工程师素质的探讨

分析了造价工程师应具备的素质,阐明了对造价工程师进行继续教育的原则和培养目标。     

n维氢原子的散射态

研究了n维氢原子的散射态性质．给出了精确的按“k/2π标度”归一化的散射态的精确解波函数及相移表达式，讨论了相移的解析性质，获得了束缚-连续跃迁矩阵元的解析计算公式．普通氢原子(n=3)散射态的有关结果作为特例包含在本文的一般结论之中． 关键词： n维氢原子 散射态 精确解 相移 束缚-连续跃迁矩阵元     

2006年秋末一次连续性降雪天气过程诊断分析

对连续性降雪过程进行了综合分析,提出了该类降雪过程的预报着眼点。     

颗粒饲料在太原动物园动物饲养中的应用

介绍了颗粒状配合饲料的性状,分析了全价颗粒饲料在饲喂动物中的优势,总结了颗粒饲料加工和使用中应注意的问题。     

论海峡两岸一脉相承的敬字信仰——以福建客家地区为例

敬字信仰是中国历史上广泛存在于民间的一种信仰形式。迄今祖国大陆从文献资料出发研究敬字信仰的成果尚属空白。宝岛台湾虽然相关研究成果迭见，但研究的区域范围局限于台湾地区。笔者自去年以来通过在福建客家地区广泛的田野调查，从各种文献中搜寻到相当数量的第一手资料，有力印证了台湾学者提出的台湾敬字信仰来源于祖国大陆的观点，一定程度上弥补了海峡两岸敬字信仰渊源关系问题研究的资料空白，为证明海峡两岸敬字信仰的渊源关系提供了有力的证据．     

Analysis of a Multiserver Queue with Setup Times

This paper deals with the analysis of an M/M/c queueing system with setup times. This queueing model captures the major characteristics of phenomena occurring in production when the system consists in a set of machines monitored by a single operator. We carry out an extensive analysis of the system including limiting distribution of the system state, waiting time analysis, busy period and maximum queue length. AMS subject classification: 90B22, 60K25     

连续刚构梁0号块受力分析

计算了连续刚构桥的0号块在复杂荷载下的受力模式,对结构进行了优化,并总结了其受力特征。