用数学模型求解票据转贴现中的盈亏平衡点

近几年,票据转贴现业务在银行间市场兴起,并迅速壮大,但关于该业务的报价分析和深入研究几乎是空白。作者结合对银行资金交易的全面了解,以及工作中对票据转贴现业务的深入分析,找出对票据转贴现盈亏起决定作用的因素,进而,依据＂盈亏平衡＂理论,建立数学模型,精确推导出合理的贴现率报价,使得报价行在保证持有票据期间的期望收益率后,最大化持有期收益或最小化持有期的亏损。     

Theme park revenue management with a dual admission policy

There are several efforts to increase the revenue of theme parks. One of them is to divide admission policy into normal and express admission. If a certain customer buys express admission ticket with more expensive price, it is possible to reduce the excessive waiting time by using the exclusive waiting line for some or all the attraction’s rides. In this study, decision-making elements such as the price of the express admission ticket, maximum allowed number of express admission ticket per day, and the type of rides which can apply the express admission ticket are investigated to maximize the revenue.     

Alternative evolutionary theories: A historical survey

Our overview has the objective of making our study relevant to bioeconomists. The need for the ‘alternatives’ to the Synthetic Theory of Evolution in social-economic studies was substantiated, for example, by Colombatto (Journal of Bioeconomics, 5, 1–25, 2003), who maintains that the natural-selection theory is ‘ill suited’ to describing evolutionary processes in economics. He proposed an alternative ‘non-Darwinian’ approach by equating the ‘non-Darwinian’ approach with a definite version of neo-Lamarckism. Yet, as we will show, there is a palette of alternative approaches within and beyond the neo-Lamarckism. We hope to give bioeconomists more choice in their theoretical modeling and constructing of analogies between biology and economics. It will also be shown that in the light of suggested definitions the concept of ‘universal Darwinism’ recently discussed in bioeconomics makes little sense as a generalizing category. In addition, in the concluding part of the paper we demonstrate that the majority of alternative approaches are far from being pigeonholed as archaic and once and for all wiped off the theoretical landscape. On the contrary, in recent years one can observe some revival of interest in the theoretical ‘heresies’.      

基于数学规划的混凝土最佳砂率确定方法

砂率对混凝土的经济性和耐久性的影响不可忽视。本文讨论了最佳砂率的影响因素，介绍了数学规划的基本思想和求解方法。利用正交试验和最小二乘法建立了坍落度(SL)与用水量(W)和砂率(Sp)之间的数学模型，在此基础上可以通过数学规划的方法确定任一指定坍落度下的最佳砂率。     

将数学软件和数学实验融入微积分教学的实践

现有的高等数学教学已不适应现代经济发展要求。我们将Mathematica数学软件和数学实验引入课堂教 学,利用数学软件的功能,提高学生学习数学知识和应用数学知识解决实际问题的能力,以达到培养学生的创新意识 和应用能力。     

数学文化融入高等数学教学的探索

结合高等数学教学实践,在教学中渗透数学文化教育,引入数学史内容和数学应用,结合现代化教学手段,采取灵活多样的教学方式,可有助于激发学生的学习兴趣,增强学生的思维能力和应用能力。     

浅谈大学数学教学

要做好大学数学的教学改革，就应衔接好大学数学与高中数学的教学内容，在教学过程中引导学生认识数学的文化价值和数学美，渗透数学实验思想，逐步培养学生的科研意识。     

几种集输管网井组划分方法的比较

比较了几种井组最优划分的数学模型,得出了由于井式约束与集输站处理量约束的限制,会导致集输站数量增加,从而使集输管网的经济性差的结论。应该综合考虑井产量和集输站处理量之间的关系,这样才能更加贴近实际,达到好的优化效果。     

应用型常微分方程课程设计初探

针对工科院校大学生常微分方程课程学习过程中遇到的困难和专业学习中的应用需求，提出常微分方程课程设计的若干建议，并就数学模型中的实例，尝试用数值计算的结果印证理论推导的结果。     

将数学建模融入工科数学教学研究

工科数学教学中存在重理论教学轻方法应用现象,学生兴趣不高.应将数学建模融人工科数学教学中,改进数学教学方式,培养学生的学习能力和学习兴趣.