一类化学反应流的传输问题的均匀化

研究了一类穿过具有周期分布的活性固体颗粒的区域外部,且在固体颗粒内部发生反应的化学反应流的均匀化问题.利用周期Unfolding方法,证明了均匀化结果,并在此基础上给出了矫正结果.这些结果完善了Conca,Diaz和Timofte的工作.     

基于随机均衡配流的O-D量估计双层规划模型及算法

在传统随机均衡配流模型的基础上,提出了一种增广的随机用户均衡配流模型及其求解算法。在此基础上构造了一个双层规划模型,用以描述基于随机用户均衡原则的从路段观测流量估计O-D交通量的问题,并给出了相应的求解算法。该模型及其求解算法对于解决O-D估计问题是可行有效的。     

碳排放规制与顾客环境意识对绿色创新的影响

各国排放上限规制与排放交易规制的出台与实施管制了企业的碳排放量.根据是否只关注自身收益(降低产品使用成本),文中考虑了低环境意识顾客(只关注自身收益)与高环境意识顾客(同时关注自身收益与利他性低碳制造(即关注制造阶段的环境影响)).此外,能源使用性产品在非使用阶段以及使用阶段都会产生碳排放量.鉴于此,文中研究面对两类排放规制与两类顾客行为时,企业的绿色制造创新与绿色使用创新的组合策略.结论表明:相比于低环境意识顾客,当两类碳规制的管制性较高时,高环境意识顾客有利于企业获得更高的利润;当两类规制的管制性较低时,高环境意识顾客不利于企业获得更高的利润.此外,面对管制性较高的排放上限规制时,顾客环境意识对企业的环境绩效无影响;面对排放交易规制或管制性较低排放上限规制时,高环境意识顾客通过限制产品销售数量能提升企业的环境绩效.     

路网模糊流量条件可靠性瓶颈逻辑割树模型研究

采用模糊聚类分析法、故障树方法的逻辑思想与图论的割集理论 ,研究了在一定时间范围里 ,路段模糊流量条件可靠性评价问题 ,并在此基础上 ,设计了路网模糊流量条件可靠性瓶颈的逻辑割树模型 ,提出了相应的“瓶颈算法”,并作了实证分析.     

Forecasting the recent behavior of US business fixed investment spending: an analysis of competing models

We evaluate forecasting models of US business fixed investment spending growth over the recent 1995:1–2004:2 out‐of‐sample period. The forecasting models are based on the conventional Accelerator, Neoclassical, Average Q, and Cash‐Flow models of investment spending, as well as real stock prices and excess stock return predictors. The real stock price model typically generates the most accurate forecasts, and forecast‐encompassing tests indicate that this model contains most of the information useful for forecasting investment spending growth relative to the other models at longer horizons. In a robustness check, we also evaluate the forecasting performance of the models over two alternative out‐of‐sample periods: 1975:1–1984:4 and 1985:1–1994:4. A number of different models produce the most accurate forecasts over these alternative out‐of‐sample periods, indicating that while the real stock price model appears particularly useful for forecasting the recent behavior of investment spending growth, it may not continue to perform well in future periods. Copyright © 2007 John Wiley & Sons, Ltd.     

林徽因小说《九十九度中》的现代性论析

京派著名女作家林徽因多才多艺,她的小说虽然数量不多,但几乎篇篇都是精品,代表作《九十九度中》更是以其"断面"的叙事艺术、蒙太奇手法和人物意识流动的刻画散发出浓厚的现代性,为三、四十年代的中国文坛增添了光彩。     

The Utility Additive Method and Its Usage for Studying Consumer Behavior

Multiattribute utility theory is a powerful theory tool to reveal the preferences of the consumers according to multiple attribute points of view. Utility additive (UTA) method based on Multiattribute utility theory is an ordinal regression method using linear programming. The purpose of the UTA method presented in this paper is to assess additive utility functions that aggregate multiple attributes in a composite attribute. The results of it are important for the study of consumer behavior. Finally, a simple illustrative example is presented and some extensions of the method are proposed.     

上海市旅游景区（点）客流时空分布特征及成因分析

在调研的基础上，梳理了上海市旅游景区（点）的类型及其区域分布，分析了上海市旅游景区（点）客流时空分布的总量特征、区域特征和主要类型旅游景区（点）的客流时空分布特征，认为沪外游客旅游景区（点）到访率低、休闲游憩中心逐渐向市郊转移、旅游景区（点）供需存在矛盾、旅游地生命周期作用和竞争加剧是形成其特征的主要原因．最后，提出了上海市旅游景区（点）持续发展的对策建议．     

论企业的现金流管理

笔者结合对目前企业现金流量的管理进行分析,判断企业的现金流情况,并总结如何保持良性的现金流状况。     

快速颗粒流本构关系在固液两相流中的适用条件初探

从固液两相流的颗粒相本构关系的推导出发,分别运用Chapman—Enskog．方法和Grad-13矩法考察了液相作用下颗粒相本构关系．结果表明当两相脉动速度无关或同相位时,快速颗粒流本构关系适用于固液两相流的颗粒相．并对低、高浓度固液两相流定性分析了具体的应用条件．