The gravity p-median model

In this paper we propose a new model for the p-median problem. In the standard p-median problem it is assumed that each demand point is served by the closest facility. In many situations (for example, when demand points are communities of customers and each customer makes his own selection of the facility) demand is divided among the facilities. Each customer selects a facility which is not necessarily the closest one. In the gravity p-median problem it is assumed that customers divide their patronage among the facilities with the probability that a customer patronizes a facility being proportional to the attractiveness of that facility and to a decreasing utility function of the distance to the facility.     

Buffer sizing in multi-product multi-reactor batch processes: Impact of allocation and campaign sizing policies

This paper studies the impact of management policies, such as product allocation and campaign sizing, on the required size of the finished goods inventories in a multi-product multi-reactor batch process. Demand, setup and batch processing times for these products are assumed to be stochastic, and the inventory buffer for every product type needs to be such that target customer service levels are met. To perform this analysis, we develop a queueing model that allows us to explicitly estimate service levels as a function of the buffer size, and the allocation/campaign sizing policies. This model can be used to evaluate the service level given an existing buffer configuration, as well as to determine the buffer sizes required across products to meet a pre-specified service level. It also allows us to formulate a number of insights into how product allocation decisions and campaign planning policies affect buffer sizing decisions in symmetric production systems.     

基于不同竞争状况的威斯通并购估价模型研究

本文首先根据收益增长率等于再投资额与再投资收益率的乘积这一基本结论,对超常增长而后无增长的威斯通模型作了一点修正;接着分析了该模型中隐含的企业总投资资本利润率;最后根据微观经济学理论探讨了企业在无增长阶段可能面临的不同竞争状况对其未来盈利能力和现金流的影响,建立了更具普遍性的估价模型.     

图书采购流程中资金分配模型研究

本应用现代经济理论的择优分配原理，在图书产出效益函数的性质探讨的基础上，将效益函数的约束条件转化为对资金变量的约束条件，从而简化了资金分配方案的求解。提出了资金在各类别图书中的分配模型，指导图书馆图书采购工作。     

热电联产中热、电分摊比的合理确定

符号表D蒸汽量HF燃料热值W电量下角标h供热比拥m煤耗。分摊比e环境，电n乏汽h比烙q比热量f给水0新汽在热电联产的成本分摊中，如何确定热、电分摊比，一直是一个很有争议的问题［‘－‘］。采用不同分摊方法，其热、电所得的经济效益相差甚大。因此，它直接关系到热力价格的合理制定，影响着供热企业的经济效益和热用户的利益，对热电联产事业的发展有着重要影响。本文在分析现有各种分摊方法的基础上，提出一个新的更为合理的分摊方法。1现有的分摊方法及其缺陷和应用范围1．1热量法将总热耗量按热、电两种能量数量的比例来分配［‘－‘…     

Statistical Multiplexing of Homogeneous Fractional Brownian Streams

In this paper, the statistical multiplexing of independent fractional Brownian traffic streams with the same Hurst value 0.5<H<1 is studied. The buffer overflow probabilities based on steady-state and transient queue length tail distributions are used respectively as the common performance criterion. Under general conditions, the minimal buffer allocation to the merged traffic is identified in either case so that strictly positive bandwidth savings are realized. Impact of the common H value on multiplexing gains is investigated. The analytical results are applicable in data network engineering problems, where ATM is deployed as the transport network carrying long-range dependent data traffic.     

国有企业人力资本与所有权安排的实证分析

本首先对中国国有企业人力资本与所有权安排制度作一简要考察，然后对中国国有企业人力资本与所有权安排问题进行实证分析，在此基础上进一步对国有企业人力资本与所有权安排的制度进行分析。     

风险项目的投资期权分析

本文讨论了风险投资家向企业主融资时的投资期权,求出了投资期权的表达式,并对其中的一些参数进行了分析.     

敏捷供应链管理中最优激励方案的实现问题研究

合理的利益分配策略可以稳定敏捷供应链的运营过程,加速敏捷供应链目标的实现.基于委托-代理理论,研究了敏捷供应链利益分配中最优激励方案的设计问题,得出在信息对称条件下由于合作伙伴企业的努力水平可以为主导企业所观测,因而容易制定最优激励方案并实现利益分配.而在更多的信息不对称条件下,需要对合作伙伴企业的产出结果进行监督和评估,通过不同努力水平下的分布概率间接地获得努力水平信息.该结论对于敏捷供应链利益分配系统的设计与实现具有重要指导意义.对最优激励方案在敏捷供应链利益分配中的实现过程进行了说明,通过适当的评价指标体系和评价方法,实现了利益分配中考虑努力水平等因素的激励策略.     

双重网络嵌入对公司IPO后市场表现的影响研究

将社会网络嵌入理论从单一网络拓展至双重网络,分析上市公司同时嵌入风险投资网络和承销商网络对公司IPO上市后市场表现的影响。利用2004～2017年有风险投资支持的IPO公司数据,实证检验结果表明：(1)单独嵌入风险投资网络中心位置、单独嵌入承销商网络中心位置,均会提高公司IPO后市场表现;(2)同时嵌入风险投资网络中心位置和承销商网络中心位置,对公司IPO后短期市场表现的正向影响会相互替代;(3)同时嵌入风险投资网络中心位置和承销商网络中心位置,对公司IPO后长期市场表现的正向影响会互相补充。