基于模糊利率和随机死亡率下的生存年金精算现值模型

精算实务中保险给付大多以离散型为主.在模糊变量刻画的离散型利率条件下,利用具有非均值回复特性的带跳Feller过程描述连续型死亡率,通过精算学中的整值剩余寿命的定义方法,将其转化为离散型,从而建立离散型下生存年金精算现值模型,并给出了生存年金的趸缴纯保费的计算公式.     

条件阿基米德Copula在家庭联合寿险精算中的应用

在统一生命精算符号的前提下研究家庭联合寿险精算问题．在对利息力采用Wiener过程刻画,并用条件阿基米德Copula函数处理个体间相依性的假设前提下,计算家庭联合寿险的精算现值以及均衡年保费．     

一种改进的单亲家庭联合保险的精算模型

建立了一种单亲家庭联合保险精算模型,利用Copula函数工具修正联合保险个体生命间的独立性,并利用Copula函数处理个体间的相关性,以弥补传统联合生命表的缺陷,并在此基础上推导了寿险、年金的精算现值及其均衡年保费的计算方法.经过两者的数值模拟,得出重要的结论:当把相关的个体简单的认为独立时,会引起净保费的增加,从而损害投保人的利益,而且当个体生命间相关程度越高,增加的净保费越多.     

通货膨胀对寿险影响的精算分析

利用利息理论与寿险精算原理,从精算的角度分析和证明通货膨胀对不同交费方式、不同保险期限年金保险的影响,进而说明通货膨胀对其他寿险的影响,即年交保费的实际现值与通货膨胀呈负相关关系.     

关于Ⅱ型二元Pareto分布的一个注记

研究Ⅱ型二元Pareto分布族中随机向量的序关系、相依性的动态性质及分布的年龄性质,得到随机变量间的随机序、递增凸序、上卦限序;证明了该分布族中剩余寿命的相依性随年龄的递增依上卦限序递增或递减的动态性质;并论证了这个分布的剩余寿命随着年龄的递增依上卦限序递增.     

随机利率下的联合保险

为了简化计算,传统的精算理论均采用固定利率来计算保费.但利率具有随机性,由利率随机性产生的风险对保险公司来说相当大.为此以一对夫妻作为被保险人,研究连生寿险的双随机模型.模型包括夫妻终身寿险以及夫妻养老金等.考虑到保费的实际投资情况以及突发事件对利率的影响,对随机利率采用反射Brownian运动和Poisson过程联合建模,给出了纯保费精算现值的计算公式,并在死亡均匀分布的条件下,得到纯保费精算现值的简洁计算公式.计算实例证明利用该公式进行保费计算可得到理想结果.     

不同利息力模型下生存年金的比较

给出了利息力分别为常数和、变量、随机变量时的生存年金精算现值模型及其等价模型,通过实例证明了采用不同利息力模型时,尽管整个支付期间利息力的均值相同,但生存年金精算现值仍具有一定的差异.     

随机贴现率下的年金计算

研究在随机贴现率相互独立条件下某些延付年金现值的计算问题,目的在于研究其现值的期望和方差.本文重新定义了在固定贴现率下的一系列延付年金的现值公式,并给出了在随机贴现率相互独立条件下某些年内期末付等额年金,递增年金,递减年金和几何级数年金的现值计算公式及其现值的一阶矩、二阶矩的递推关系.利用该关系,推导出了各年金现值的期望和方差公式.     

分数跳-扩散下的综合人寿保险

以综合人寿保险模型为研究对象,改进传统的常值利率的寿险模型,利用分数Brown运动和Poisson过程联合对利息力建立数学模型,获得了年金,终身寿险的精算现值公式,以及几种保险产品综合起来的人寿保险模型,通过调整参数,可获得不同的保险产品.     

风险间的相依性对厘定费率的影响

在传统的风险理论中,风险之间的关系常被假设为相互独立的,但在现实中,风险之间一般是不独立的.本文以人寿保险为例,利用同单调关系研究夫妻之间的相依关系对其寿命的影响,进而利用Copula这一工具讨论婚姻状况对厘定保险费率的影响.研究结果表明婚姻状况对厘定保险费率是不可忽视的重要因素.同时为和睦婚姻能延寿这一论点提供了数学依据.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has