高速铁路车站作业计划优化编制方法研究

以高速铁路车站作业总时间最短、设备均衡使用、提高车站作业效率为目标,考虑设备独占性、设备相容性、作业时间范围、作业接续性等相关约束条件,建立了高速铁路车站作业计划编制的0-1整数规划模型.并采用列生成算法来进行求解,以北京南站为例进行实证研究,得出北京南站车站作业计划并对计算结果进行分析,证明了模型和算法的合理性和有效性.     

政府投资工程全寿命周期监管研究

政府投资工程由于其资金来源的特殊性,为了有效控制政府投资,减少资源的浪费,推进节约型社会的建设,有必要对其实施全寿命周期监管。分析了我国政府投资工程监管现状及其存在的问题,分析了影响政府投资工程全寿命周期监管的因素。从横向和纵向两个维度构建了工程投资决策阶段、建造实施阶段及其建成使用阶段的监管机制,并提出相应的配套措施建议。     

制造企业在供应链管理实践中的问题分析及建议

随着西方一些知名企业的供应链管理获得巨大成功,中国企业开始积极效仿。针对中国制造企业多年来宾践供应链管理的状况,文章对目前普遍存在的问题进行了简要分析,并提出了一些建议。     

项目团队下属间冲突管理模式的量表开发与评测——基于团队领导者的视角

项目团队下属间发生冲突往往不可避免,其对团队持续稳定和整体绩效有重要影响。现有研究对冲突管理的维度划分与量表设计均将视角聚焦于冲突当事人,关注其对冲突的反应和采取的行动。鲜有从团队领导者视角出发,研究其管理团队下属间冲突的模式及相应量表的开发。文章采用定性研究和定量研究相结合的方法,将领导管理下属间冲突的模式依据"关心程度—处置时间"两个维度分为决断(关心且迅速处置)、审慎(关心但花费较长时间)和回避(不关心)三种模式。通过量表开发与量表评测等过程,确定了基于团队领导者视角的项目团队下属间冲突管理模式量表。发展了项目团队冲突管理的理论和方法,为后续研究提供新量表工具的支持。     

The Pricing of Default-free Interest Rate Cap,Floor, and Collar Agreements

The paper focuses on the valuation of caps, floors, and collars in a contingent claim framework under continuous time. These instruments are interpreted as options on traded zero coupon bonds. The bond prices themselves are used as the underlying stochastic variables. This has the advantage that we end up with closed form solutions which are easy to compute. Special attention is devoted to the choice of the stochastic process appropriate for the price dynamics of the underlying zero coupon bonds.     

COLLEGE MAJOR CHOICE AND CHANGES IN THE GENDER WAGE GAP

The distribution of college majors changed markedly between the 1970s and 1980s as fewer students completed degrees in low-skill fields such as education and letters and more graduated in high-skill fields such as engineering and business. This shift was most dramatic for females, who previously were concentrated in low-skill fields relative to those of males. This paper examines how this education-related skill upgrade, as represented by changes in the major distribution, affected the gender wage gap for college graduates during the 1980s. The results show that convergence in major distribution between males and females contributed to a decline in the gender wage gap for college graduates.     

Investment Policy and Exit-Exchange Offers Within Financially Distressed Firms

This article examines the conflict of interest between shareholders and bondholders in a setting in which firms can renegotiate the terms of existing debt with public debtholders. In particular, we consider one of the most common types of debt restructuring: the exit-exchange offer. Our analysis explores the relation between exit-exchange offers and investment choice by the manager, and it concludes that managers, acting strategically on behalf of shareholders, may select inefficient investment projects in order to enhance their bargaining position vis-a-vis creditors. Holding the upside potential of an investment project fixed, managers/shareholders prefer projects with lower payoffs in states of bankruptcy because it induces individual bondholders to accept poorer terms in a debt-for-debt exit-exchange offer, thus generating a greater residual for shareholders in states of solvency. Additionally, we show how the investment inefficiencies in our analysis depend on (i) the inability of bondholders to coordinate their actions; (ii) the ability of managers to commit to suboptimal investment projects; and (iii) the coupling of an individual bondholder's decision to tender and her decision to consent to allow the firm to strip fiduciary covenants. We suggest conditions under which a ban on coupled exit-exchange offers—or alternatively, constraints on “debt-for-debt” exchanges—would be efficiency-enhancing.     

基于ADSL的局域网共享接入方案与实现

本文首先简要地介绍了ADSL的技术原理与接入方法，然后详细说明了基于ADSL的局域网NAT技术，并提出一种基于Linux的局域网ADSL共享接入的实现方案，最后给出了该方案的具体兑现安装步骤。