不完全噪声交易信息下的内部交易

内部交易常常受到噪声的影响。依据在做市商观察到部分噪声交易量的信号(即不完全噪声交易量信息)的基础上,研究了此信号被观察到的精确程度对内部交易者的期望利润、交易强度、市场流动性产生的影响。研究表明,做市商对该信号观测得越精确,内部交易者的期望利润、交易强度和市场流动性越小;但它不影响内部交易者信息的释放量。     

风险概率下不完全信号时内部交易

针对不完全信息下双寡头交易,提出了风险资产交易市场中内部交易模型.内部交易者能获得私有信息,因此内部交易者利用私有信息进行投资获取利润;但是,当内部交易者对市场的有利情况进行分析后,他们以某风险概率投入交易量,此时内部交易者交易策略相同,期望利润更高,交易强度更大,释放的私有信息不变;由于内部交易者可以选择性投入交易总量,当投入交易量对自己有利时,他们投入大量交易量,因此,他们交易强度更大,能获得更高利润;内部交易者私有信息释放量只与交易量相关,与他们是否交易无关,所以,内部交易者选择性投入交易量会更有利.     

在不完全信息下的内部交易行为分析

在真实的金融市场中,内部交易者往往不能准确预知风险资产价值,而观测到关于风险资产价值的一个信号。本文应用正交化技巧,对交易价格信息进行分离,研究了两期不完全信息下的内部交易。研究表明,信号扭曲因素显著影响了市场流动性、市场深度、内部交易者期望利润以及信息的释放量。     

公共信息、内部启发性对监管市场均衡的影响

主要研究理性内部交易者、启发性内部交易者和做市商均收到部分风险资产公共信息时的内部交易监管市场,证明了该市场的最优交易策略、有效定价规则和最优监管力度组成的线性Bayesian-Nash均衡的存在唯一性。结果表明:当市场处于该线性均衡时,1)启发性内部交易者的利润总是高于理性内部交易者的利润;2)当公共信息越偏离资产的真实信息程度越大时,理性内部交易者的利润越多,噪声交易者损失更大,市场深度越小,监管力度越强;3)当启发性内部交易者重视信息程度越大时,理性内部交易者利润越小,而启发性内部交易者利润越大,市场监管力度越强,但是噪声交易者损失不受影响。     

相关噪声波动率对连续内部交易均衡的影响

研究了风险资产和流动交易量受到相关噪声影响的连续内部交易模型.应用滤波理论和动态规划方法,证明了由内部人的交易强度和市场流动性组成的线性均衡的存在性和唯一性.研究表明:若风险资产只随相关噪声变化,且只有当风险资产的波动率与流动交易量的波动率正线性相关时,内部人才不参与市场交易,否则,内部人总能赚钱.特别地,当风险资产的...     

部分信息定价下的最优连续内部交易线性策略

研究一类连续垄断内部交易模型,其中做市商对观测到的部分风险资产信息存在某种价值扭曲和过度自信。应用滤波理论,我们证明了内部交易市场中在半强有效性定价下最优内部交易策略的存在性。并发现内部交易的信息在交易最后时刻全部释放,但内部交易者的交易强度均随风险资产信号扭曲率和过度自信程度增大而增大,而对应的利润减少。     

不完全信号时内部交易

在假设内部交易者均收到不完全信号的基础上,对该信号在交易市场中所产生的影响进行了研究;在内部交易者进行多次交易时,模型以Schimidt正交化为研究方法、以标准Cournot双寡头模型为指导思想;进而得到风险资产市场上的均衡解及相关结论.     

噪声交易者数量变动对股票流动性影响

基于噪声交易模型构建了价格冲击模型,研究了噪声交易者数量变动对于股票流动性的影响,发现噪声交易者的数量越大股票流动性越差。数值模拟结果与理论预测是吻合的。     

基于DHS模型的噪声交易者行为分析

首先对DHS模型进行适度改进。然后解释改进后的DHS模型中投资者的市场行为特征,得出基于噪声私人信息的交易行为对股市有助涨助跌效应。最后尝试给出噪声交易行为下投资者的损失风险函数,对噪声交易者起到风险警示作用。     

外部人无私有信息下的理性信息泄露

建立一种内部交易者可以与做市商或其他交易者等外部人共同分享部分风险资产信息的内部交易模型;证明了由有效定价规则和最优交易策略组成的线性Bayesian-Nash均衡的存在性。结果表明,如果外部人没有各自的私人信息,那么内部交易者的理性信息策略是不向外部人泄漏自己的任何私有信息。     

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