双跳-扩散过程下时间依赖型的脆弱期权定价

在公司价值风险模型的基础上,研究对手单方违约风险的衍生产品定价.假设标的资产价格和合约出售方的资产-债务比均服从跳-扩散过程,其中无风险利率r(t)、标的资产的波动率σ(t)以及红利率d(t)均为关于时间的函数;而后运用结构化方法建立了双跳-扩散过程下的公司价值型脆弱期权定价模型,应用Ito引理和等价鞅测度变换,导出了期权价格的解析表达式.     

随机利率下双指数跳扩散模型欧式期权定价

为了合理刻画股价实际变化趋势,将利率风险引入双指数跳扩散模型,建立了随机利率和双指数跳扩散组合模型,然后在组合模型下利用鞅方法、Fourier逆变换和Feynman-Kac定理给出了欧式看涨期权价格的闭式解,推广了Kou在2002年提出的模型及期权定价问题,所提模型及方法有利于资产收益的经验分析,同时为公司信用风险管理提供理论依据。     

跳扩散模型中随机利率和随机波动下期权定价

为合理刻画股价实际变化趋势,在双指数跳扩散模型中通过允许利率随机和波动率随机建立了合理的市场模型;然后利用鞅方法推导了随机利率、随机波动率下双指数跳扩散模型的欧式期权定价的闭式解;最后通过数值模拟分析了模型的主要参数对期权定价的影响.数值结果显示:所提模型能够较好地刻画股价实际变化趋势,股票收益和波动率负相关,随机利率对短期到期期权影响几乎可以忽略,而对长期到期期权价格影响显著.     

跳扩散模型的期权定价

Merton在1976年建立了著名的跳扩散模型,本文利用了随机分析中的鞅方法推广了Merton关于欧式期权定价的结果,讨论了跳扩散模型的一般情形:假定股票价格过程遵循Poisson跳跃的扩散过程,股票预期收益率,波动率和无风险利率均为时间的函数,以及风险资产支付红利,并且有依赖于时间参数的红利率的情况下,获得了欧式期权的定价公式和买权与卖权之间的平价关系。     

一类跳扩散模型下的欧式双向期权定价

文章假定基础资产股票价格的跳过程为比Poisson过程更一般的跳过程—一类特殊的更新过程.在市场无套利条件下建立随机微分方程,以随机分析和鞅理论为基础,用鞅定价方法得到了跳扩散模型下的欧式双向期权定价公式.     

脆弱期权的公司价值分形定价模型

以公司价值信用风险模型为基础,讨论了欧式脆弱期权定价问题,建立了标的资产价格服从几何分形布朗运动的脆弱期权定价模型;在分形HJM利率和随机负债假设下,利用拟鞅定价,推导出欧式看涨脆弱期权的定价公式。     

随机利率下股票价格服从指数O-U过程的期权定价

文章建立了股票价格服从指数O-U过程的随机微分方程,在风险中性的假设下利用Girsanov定理找到了该模型的唯一等价鞅测度;利用期权定价的鞅方法,得到了随机利率情形下股票价格服从指数O-U过程,并且影响利率的因素与影响股票价格的因素相关时欧式期权的定价.     

利率随机时的跳跃扩散过程的期权定价模型

假定股票价格的跳过程为一般的计数过程,建立了股票价格服从跳扩散过程的行为模型。运用随机分析中的鞅方法,讨论了当利率为随机变量时的期权定价问题,推导出了利率随机时欧式买权与卖权的定价公式以及平价关系,推广了已有的结果。     

随机跳环境下远期起点期权的近似定价

在跳扩散过程模型下研究了远期起点期权的定价问题.首先利用Girsanov定理得到了跳扩散模型下鞅测度的表示式,然后利用鞅定价理论得到了易于计算的远期起点期权的定价公式,利用它可以直接计算期权的任意精度近似价格.     

有多个跳跃源的跳扩散模型的期权定价

假设资产股票价格的跳过程为比Possion过程更一般的一类更新过程,考虑受多个跳跃源影响的情况下,利用等价鞅测度变换方法,给出了具有随机利率的跳扩散模型的期权定价公式.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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