大型钢结构料仓设计

根据松散固体物料在料仓中的流动特性及料仓工艺结构,文章分析了仓体结构及其载荷分布特点,提出仓体计算要点及需考虑的基本应力,对各计算要点和基本应力值加以具体地计算和校核,得到结构运行安全、可靠、经济的料仓体。     

A novel heuristic approach for solving aircraft landing problem with single runway

Nowadays, airlines administrations are more willing to utilize optimization tools to control air traffic due to considerable increases in volume of air transports. A challenging problem in the field of air traffic is how to optimally schedule landing time of aircrafts and assign them to different runways such that early and late landing costs are minimized. This problem is called aircraft landing problem (ALP). This paper proposes a novel decomposition based heuristic by solving two sub-problems for the ALP with single runway. In the first sub-problem, we apply the adaptive large neighborhood search (ALNS) algorithm to find a sequence of aircrafts. The solution found in the first sub-problem will be sent to the second sub-problem, to check for the feasibility of the solution using CPLEX solver. A set of benchmark problem are taken from the OR library for the purpose of comparison with other existing approaches. The computational results exhibit that the proposed algorithm is capable of finding the best known optimal solution for all the instances.     

Fair allocations in large economies with unequal production skills

This paper considers the problem of fair allocation among individuals with unequal production skills. We introduce the concept of productivity‐adjusted average no‐envy. It is shown that equal‐income Walrasian allocations are the only surviving allocations that are productivity‐adjusted average envy‐free and efficient when the original economy is infinitely replicated. We also examine local versions of productivity‐adjusted average no‐envy and other equity concepts.     

Measures of economies with an arbitrarily large number of equilibria

Balasko (1978) shows that in a compact subset of the space of economies, not too many economies can have too many equilibria. We extend Balasko’s result to the whole set of economies for a suitable measure. We show that the measure of economies with a large number of equilibria approaches zero as this number tends to infinity. An analogous result in the infinite‐dimensional setting is also established.     

对加强国有大中型企业员工考核工作的一些思考

员工考核工作对企业发展具有重要意义。文章提出企业应对员工实行全员考核，并针对不同层面和不同岗位的员工，运用不同的考核方法、内容、周期。     

De skandinaviske Aktuarforeningers Virksomhed i 1925

Abstract

Statistical extreme value theory provides a flexible and theoretically well motivated approach to the study of large losses in insurance. We give a brief review of the modem version of this theory and a “step by step” example of how to use it in large claims insurance. The discussion is based on a detailed investigation of a wind storm insurance problem. New results include a simulation study of estimators in the peaks over thresholds method with Generalised Pareto excesses, a discussion of Pareto and lognormal modelling and of methods to detect trends. Further results concern the use of meteorological information in the wind storm insurance and, of course, the results of the study of the wind storm claims.     

基于“退火下山法”的大规模网络路由算法

文章结合模拟退火算法与下山法各自的优点,得到了一种高效、收敛的启发式算法:模拟退火下山算法,它是针对大规模网络路由的复杂性而提出了的一种有效快速的算法。作为一种启发式算法,它本身有一定的优缺点,它可以保证得到全局最优解,但是如果要更快速的收敛于最优解的话,则对初始路径的设定有一定要求。     

大型企业集团实施VMI模式研究

以大型企业集团为对象,研究了大型企业集团以区域为单位与供应商以及区域内的第三方物流企业合作实施VMI的策略和方法,重点分析比较了VMI的分散模式和集中模式。     

股权再融资、盈余管理与大股东的寻租行为

我国上市公司处于大股东的超强控制状态,大股东与中小股东之间存在严重的信息不对称,导致大股东在股权再融资过程中表现出强烈的盈余管理动机.本文研究了我国资本市场参与者的行为与盈余管理之间的关系,并分析了对资本配置效率的影响效应.大股东通过操纵报告盈余来改变会计盈余的时间分布和误导投资者,从而攫取更多的隐性收益,造成资本市场配置效率的降低.研究结果表明:(1)大股东通过盈余管理在股权再融资过程中可以获得中小股东无法得到的隐性收益;(2)大股东的收益随着盈余管理程度的增加而提升,中小股东的财富随着盈余管理程度的增加而降低;(3)盈余管理程度的增加将降低上市公司的资本配置效率和企业价值.因此,大股东通过盈余管理实现了对小股东财富的掠夺效应,造成了上市公司资本配置效率、公司价值、声誉和后续融资能力的下降.     

股利政策的因素分析：制度和技术的解释——基于公司成长性特征的实证分析

本文以763家上海证券交易所A股上市公司2003年的横截面数据为观察值，从制度和技术两个层面实证分析了现金股利政策的影响因素，分别考察了股权结构和组织特征对现金股利支付率的解释力。本文发现，股权结构（股权集中度和大股东持股）和组织特征（盈利能力、盈余水平、现金拥有量、公司规模和财务杠杆）均对现金股利政策具有一定的影响（而且大多数影响在统计上是显著的）；大股东整体上具有分配现金股利的倾向和能力。企业成长性机会能够弱化大股东集团分配现金股利的激励，并促使公司保留更多的现金用于有价值的投资机会。