具有二次分段凹交易成本的均值-方差投资组合优化

在投资过程中,交易成本是不能忽视的.一般情况下,交易量较小时,单位交易成本较大;随着交易量的增加,单位交易成本不断减少;当交易量大于某值时,单位交易成本不变.提出了交易成本函数为二次分段凹函数的均值-方差投资组合模型,并结合不等式组的旋转算法和分枝定界法求解.最后,采用中国证券市场的实际数据,运用自编程序计算出不同期望收益率所对应的最优投资比例,从而为投资者提供决策支持.     

基于均值—方差模型的保险资金投资组合研究

利用Markowitz于均值—方差组合模型,根据近三年的投资收益率情况,在给定预期收益率的情况下,构建了各类资产的最优配置。     

具有交易成本的均值-绝对偏差模糊投资组合优化

考虑到资产收益率的模糊不确定性,提出具有交易成本和交易量限制的均值-绝对偏差模糊投资组合优化模型。运用可能性理论将该模型转化为显式的线性规划问题,并采用改进的旋转算法进行求解。最后通过实证研究证明该模型和算法的有效性,讨论了资产收益率为梯形模糊数的情况下投资者针对现有投资组合的调整策略。     

GEYR值作为我国投资策略的可行性研究

对我国国债与股票收益率比值（GEYR）进行研究,发现国债与股票收益率存在单位根,相互之间存在协整关系,而GEYR是平稳的.利用GEYR的变化建立股票债券投资策略,发现与其他投资策略相比,用马尔科夫转换机制模型预测GEYR并建立的投资策略具有较高收益率,但考虑了交易成本和风险后并没有明显优势.     

套利组合及其收益率的概念研究

通过比较投资、套利这两个极其基本的金融概念及其相关的一些概念,严格导出了套利组合和套利组合收益率的概念,进而讨论了明确这些概念的理论及实际意义.     

摩擦市场投资组合选择的极大极小方法

在一种新的投资组合选择原理———极大极小原理的基础上,提出了一种新的投资组合选择模型;在市场因素多变的情况下,假设有t种可能的市场情况,最大化这t种市场情况的最小可能预期收益率,并考虑交易成本这种摩擦;然后用极大熵算法给出了这一问题的数值解法,最后用一个实例来验证这一方法的有效性.     

基于回望期权考虑备用保证金的期货定价模型

基于备用保证金与回望期权具有共同的路径依赖特性,构建期货市场备用保证金回望期权模型,进而度量出在期货建仓时点持有期货空头或多头的备用保证金额度.考虑到备用保证金是实际期货套利操作的必要构成要素,是交易成本的一个组成部分,将备用保证金引入无套利定价模型,从而构建更有实际操作价值的期货无套利定价区间模型.最后通过算例分析,进一步说明备用保证金和无套利定价的具体测算方法.     

国际组合套利机理及优化策略分析

以国际套利定价理论为基础并对其进行拓展,构建了国际多因素模型.通过进一步的数理分析,给出国际组合套利行为的定义,指出国际组合套利的触发条件和套利机会出现的决定因素,进而对国际组合套利行为的机理进行了系统描述:即通过构建组合,提高资产相关性,实现用于套利的资产匹配.在忽略交易成本的前提下,运用均值-方差法,求解出一种优化的套利组合权重.     

基于ETF组合的股指期货套利

选取华安上证180ETF和易方达深证100ETF的标的指数作为现货,将交易成本和跟踪误差损益引入套利成本,构建沪深300股指期货的无套利边界,并对IF1005和IF1102两个主力合约进行了套利机会的实证研究,发现:2个主力合约都存在套利机会,且都只存在单边套利机会,IF1005的套利机会明显的比IF1102多.最后根据研究结果提供了相应的投资建议.     

有交易成本且支付红利的两值期权定价模型

利用对冲的思想和偏微分方法,研究了在交易过程中的两值期权的定价问题.以Black-Scholes模型的基本假设条件为基础,在无风险利率、期望收益率、波动率、红利率均为时间t的函数,以及交易过程中有交易成本和支付红利的假设下,利用无套利原理和偏微分方程的有关理论和方法推导出两值期权中“现金或无值看涨期权（CONC）”的定价公式,并利用CONC的价值与＂资产或无值看涨期权（AONC）＂的价值关系推导出了AONC的价值.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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