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本文讨论有风险控制的最优控制组合问题并研究了倍率风险函数及临界风险的性质,最大最小风险的估计,给出了其倍率-风险函数有严格解析形式的例子。 相似文献
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有风险控制的最优投资组合(英) 总被引:1,自引:0,他引:1
本文讨论有风险控制的最优投资组合问题并研究了倍率风险函数及临界风险的性质,最大最小风险的估计;给出了其倍率风险函数有严格解析形式的例子. 相似文献
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《数学的实践与认识》2017,(24)
博弈期权是一种赋予期权出售方在期权有效期内任意时刻可以赎回合约权利的美式期权.在B-S框架下分析了双币种情形下的博弈期权定价行为,建立了双币种博弈期权的定价模型,分别讨论了敲定价以国内货币计价和国外货币计价下的博弈期权定价问题及其最优赎回策略,通过运用偏微分方程的方法得到了这两种情形下期权价格的表达式及其最优执行边界.最后通过数值模拟,分析了标的资产和汇率的波动水平以及汇率与标的资产的相关系数对期权的最优执行策略和违约金边界的影响. 相似文献
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核电的发展离不开安全的保障,核电建设的快速发展使得核电建筑施工企业在市场竞争和项目施工两个方面面临安全投入策略的选择问题,基于此,根据多指标博弈理论构建了两个博弈模型,分别讨论了竞争条件下和施工监管条件下企业安全投入的策略选择,研究结果表明合理的安全投入将会使企业在竞争中占据优势地位,同时在施工阶段企业需要根据监管方的策略变化选择与之适合的安全投入策略,从而实现自身效用最大化的目的。 相似文献
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如何解决排污企业与附近居民损失的争端是一个越来越重要的问题.本文认为这是一个机制设计问题,并建立了模型,在企业作为机制的设计者,附近居民遭受的损失是不确定的,但其产权安排占优势情况下,在个体理性和激励相容的约束下,得到了利润最大化方案并且讨论了其性质.研究表明,在均衡时,机制产生的后果是无效率的;且随着遭受损失的居民人数增加,效率越来越差. 相似文献
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线性规划多重最优解判别准则刍议 总被引:1,自引:0,他引:1
本构造了一些线性规划问题来探讨多重最优解的判别准则,补充了现行献中关于多重最优解判别准则描述的不足,并指出多重最优解判别准则在出现退化解时可能失效的例外情况。 相似文献
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用变分方法研究篮球投篮最佳出手角 总被引:2,自引:0,他引:2
运用变分方法对投篮最佳出手角的确定进行了研究,从抗角度偏差与抗速度误差及出手最省力三个方面,对出手角的优化进行了讨论,得到了较好的,并且符合实际的精确定量结果. 相似文献
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Anning Hu 《The Journal of mathematical sociology》2013,37(4):280-303
Odds ratio (OR) and the educational Gini coefficient (EGINI) defined on a specific social grouping scheme can both be used to gauge educational inequality. In this study, we systematically review the scholarship that underpins the utilities of OR and EGINI and evaluate their properties across four research scenarios of allocating newly created opportunities under educational expansion. Formal analyses suggest that (1) both OR and EGINI monotonically increase (decrease) if the newly created educational positions are entirely delivered to the upper (lower) class. However, the rate of change differs between OR and EGINI. (2) When educational opportunities within expansion are allocated according to the relative populations of social classes, the probabilities of upper and lower classes to receive better education rise by the same extent, suggesting that all social classes benefit from the proliferation of educational credentials. This would drive down the EGINI, but change in OR is not monotonic. (3) EGINI remains unchanged if the newly created educational opportunities are allocated based on the initial class composition of better educated individuals before educational expansion. However, OR is driven to increase by the “Matthew Effect” where the increment in educational probability for the upper class is larger than that for the lower class. The discrepancy of empirical patterns between OR and EGINI is explained, and the practical implications are discussed using a case study of the educational policy evaluation in Britain. 相似文献
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阐述了影子价格的概念,提出影子价格价值公度性的概念,讨论了在实际应用中较容易造成混淆的临界特性,对资源分配问题进行了较细致的分析,有助于最优资源分配方案的决策和最大利润的实现. 相似文献
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For semiparametric survival models with interval-censored data and a cure fraction, it is often difficult to derive nonparametric maximum likelihood estimation due to the challenge in maximizing the complex likelihood function. In this article, we propose a computationally efficient EM algorithm, facilitated by a gamma-Poisson data augmentation, for maximum likelihood estimation in a class of generalized odds rate mixture cure (GORMC) models with interval-censored data. The gamma-Poisson data augmentation greatly simplifies the EM estimation and enhances the convergence speed of the EM algorithm. The empirical properties of the proposed method are examined through extensive simulation studies and compared with numerical maximum likelihood estimates. An R package “GORCure” is developed to implement the proposed method and its use is illustrated by an application to the Aerobic Center Longitudinal Study dataset. Supplementary material for this article is available online. 相似文献
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赌博破产概率及其随机模拟试验 总被引:1,自引:0,他引:1
农吉夫 《数学的实践与认识》2010,40(16)
讨论了赌博问题中的最终破产概率,并给出了破产概率的随机模拟计算流程和一个具体例子的数值模拟结果.计算结果表明,由此方法得到破产概率的估计值与理论值的误差很小.最后,通过随机模拟给出游戏结束的平均次数. 相似文献
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针对应用概率研究的需要,提出了较重尾分布的概念,以失效函数为工具,着重探讨并得到了一些利用相互比较重尾程度来确定分布族的方法. 相似文献
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Let u be the solutions to some elliptic equations of the form
in some Lipschitz domains, a direct and elementary proof of the doubling property for u2 over balls near the boundary is presented, and the unique continuation at the boundary for Dini domains is founded.AMS Subject Classification (1991): 42B20, 35J10 相似文献