青黄海底隧道接线工程近接地面建筑物段爆破震动控制数值分析

针对当今城市隧道中比较常见的爆破震动问题进行分析，采用动力有限元软件对青黄海底隧道接线工程中的典型断面进行爆破震动数值模拟。分析结果显示，当相邻段别炮眼起爆时间间隔大于50ms以后，可忽略爆破震动的叠加效应，因此可采用分段模拟的方法对隧道爆破效果进行分析，在此基础上对本工程钻爆设计进行了讨论，并提出了改进建议。     

Dynamic Pricing to Minimize Maximum Regret

We consider a dynamic pricing problem that involves selling a given inventory of a single product over a short, two‐period selling season. There is insufficient time to replenish inventory during this season, hence sales are made entirely from inventory. The demand for the product is a stochastic, nonincreasing function of price. We assume interval uncertainty for demand, that is, knowledge of upper and lower bounds but not a probability distribution, with no correlation between the two periods. We minimize the maximum total regret over the two periods that results from the pricing decisions. We consider a dynamic model where the decision maker chooses the price for each period contingent on the remaining inventory at the beginning of the period, and a static model where the decision maker chooses the prices for both periods at the beginning of the first period. Both models can be solved by a polynomial time algorithm that solves systems of linear inequalities. Our computational study demonstrates that the prices generated by both our models are insensitive to errors in estimating the demand intervals. Our dynamic model outperforms our static model and two classical approaches that do not use demand probability distributions, when evaluated by maximum regret, average relative regret, variability, and risk measures. Further, our dynamic model generates a total expected revenue which closely approximates that of a maximum expected revenue approach which requires demand probability distributions.     

命题态度句的成真条件

用动态认知逻辑特别是话语表现理论为主要研究工具,充分考虑语境因素,探讨命题态度句的语义解释,得出的结论是:(一)命题态度句的语义依赖于被报道的信念和解释者对信念主体的认知状态的表征的其它元素的交互作用;(二)对命题态度句的处理揭示了语义的动态更新过程。     

试论台海局势的动态平衡及其调控

围绕台湾海峡局势进行政治角力的各个政治行为主体以相互制约的方式形成了动态平衡态势,这是中国国家统一必须面对的台海环境。各个行为主体通过各自台海政策的调整,以冲突—反应的方式建构了动态平衡态势的啮合规则。从不同的视角检视,该系统呈现出相对稳定性、张力有限性、演进渐进性特征。如何调控这一动态平衡态势,使其向有利于国家统一的方向发展,是我们必须研究的课题。     

后民主转型的政体巩固：一个动态的民主巩固概念

关于转型后民主政体巩固问题的分析已成为民主化研究的一个重要部分，但民主巩固概念的理论现状却相当混乱。在混乱的民主巩固概念现状中，一些共识还是存在的，以这些共识为出发点从动态的视角来分析民主巩固问题可能是脱离概念混乱现状的可行之路。一个动态的民主巩固概念主要包括动态民主巩固定义和动态民主巩固判断指标，其中动态民主巩固判断指标包括民主政体维系、人们的态度行为和民主政体制度化等三方面。     

历史文化遗产保护与再利用研究

历史文化遗产是世界遗产的重要组成部分,是一种不可再生的文化资源,具有重要的历史、艺术和科学价值,其保护工作是一项长期而艰巨的任务。随着社会的发展和科技的进步,历史文化遗产的保护理念和方法不断完善和发展,保护要以正确的价值取向为原则,坚持全面的、科学的、动态的保护方法;同时,历史文化遗产的再利用要和保护协调统一,正确处理好遗产保护与现代化建设之间的关系,充分发挥遗产在现代社会中的积极作用。     

浅析权变理论在高校管理中的运用

“变化”是当今时代的主要特征。本文从权变理论的内涵入手 ,揭示了权变理论的精髓 ,剖析了在高校管理中运用权变理论的必要性和可行性 ,探讨了在高校管理实践中如何恰当运用权变理论 ,适应现代高教管理 ,充分调动管理对象的主观能动性 ,促进高教的改革与发展。     

Joint Initial Stocking and Transshipment—Asymptotics and Bounds

A common problem faced by many firms in their supply chains can be abstracted as follows. Periodically, or at the beginning of some selling season, the firm needs to distribute finished goods to a set of stocking locations, which, in turn, supply customer demands. Over the selling season, if and when there is a supply‐demand mismatch somewhere, a re‐distribution or transshipment will be needed. Hence, there are two decisions involved: the one‐time stocking decision at the beginning of the season and the supply/transshipment decision throughout the season. Applying a stochastic dynamic programming formulation to a two‐location model with compound Poisson demand processes, we identify the optimal supply/transshipment policy and show that the optimal initial stocking quantities can be obtained via maximizing a concave function whereas the contribution of transshipment is of order square‐root‐of T. Hence, in the context of high‐volume, fast‐moving products, the initial stocking quantity decision is a much more important contributor to the overall profit. The bounds also lead to a heuristic policy, which exhibits excellent performance in our numerical study; and we further prove both the bounds and the heuristic policy are asymptotically optimal when T approaches infinity. Extension to multiple locations is also discussed.     

上市公司最优动态股利支付模型的构建

通过对福建省上市公司历年股利政策的分析,在考虑公司管理层和中小投资者双方利益的基础上,利用博弈论和动态规划的思想构建了上市公司动态股利支付模型,为上市公司股利支付政策的制定提供了参考依据。     

基于互惠动机的团队激励动态博弈分析

引入被传统经济学忽略了的互惠动机行为心理特征,建立团队博弈模型,以线性契约激励为基础,分别在静态博弈和动态博弈框架下分析均衡努力和均衡产出,并进行比较分析。研究发现,无论是在静态博弈还是在动态博弈下,互惠动机都会促使代理人提高努力水平,提高团队产出,而且在动态博弈下,互惠动机的作用更强。