动态系统正实性的一种判定方法

给出了线性定常连续（离散）系统｛ｘ（ｔ）＝Ａｘ（ｔ）＋Ｂｕ（ｔ） ｙ（ｔ）＝Ｃｘ（ｔ）＋Ｄｕ（ｔ）为正实的一个新的充要条件。     

Banach空间无界控制算子的容许性

本文讨论了由ｘ’（ｔ）＝Ａｘ（ｔ）＋Ｂｕ（ｔ）描述的线性系统,当Ａ在非自反Ｂａｎａｃｈ空间上生成半群和Ｂ－为一无界算子时,Ｂ是可容的充分必要条件。     

α-次积分半群的Trotter-Kato定理与完全二阶Cauchy问题

应用α－一次积分半群的Ｔｒｏｔｔｅｒ－Ｋａｔｏ定理讨论Ｂａｎａｃｈ空间中完全二阶Ｃａｕｃｈｙ问题,当（Ａ,Ｂ）双闭时获得ｕ″（ｔ）－Ｂｕ′（ｔ）－Ａｕ（ｔ）－０,ｕ（０）＝ｘ,ｕ′（０）＝ｙ的解。     

抽象发展方程周期解的存在性与稳定性

研究了Ｂａｎａｃｈ空间中抽象发展方程ｕ（ｔ）＋Ａｕ（ｔ）＝ｆ（ｔ，ｕ（ｔ））制裁一存在性及渐近稳定性，这里假设－Ａ仅为ＣＯ－半群的无穷小生成元，取消了以往对Ａ为解析半群的生成元并有紧预解式的假定，所得结果中应用于多种数学物理方程。     

高阶Burgers-Kdv方程的初边值问题

借助适当的逼近,用散逸算子理论,差分和估计方法证明了「０,１」＊「０,Ｔ」上高阶Ｂｕｒｇｅｒｓ－Ｋｄｖ方程ｕｔ＋Ｄ＾２ｎ＋１ｕ－Ｄ＾２ｕ＋ｕＤｕ＝ｆ（ｘ,ｔ）的一类初边值问题存在唯一的解ｕ∈Ｌ＾∞（０,Ｔ;Ｈ＾２ｎ＿（０,１））∩ｃ（０,ｔ;Ｈ＾２ｎ（０,１）∩Ｗ＾１,∞（０,Ｔ;Ｌ＾２（０,１）。     

一类非线性抛物方程解之存在性

该文证明一类非线性抛物型方程ｕ＿ｔ＋Ａ（ｕ）＋ｇ（ｚ，ｕ，Ｄｕ）＝ｆ（ｚ）的解之存在性，其中Ａ是一个Ｌｅｒａｙ－Ｌｉｏｎｓ型算子，ｇ（ｚ，ｕ，ξ）除了满足符号条件ｇ（ｚ，ｕ，ξ）·ｕ≥０外，对ｕ的增长没有限制，关于｜Ｄｕ｜自然增长，即｜ｇ（ｚ，ｕ，ξ）｜≤ｂ（｜ｕ｜）（｜ξ｜￣ｐ＋ｃ（ｚ））。     

非临界情形下发展方程的周期解

研究了非临界情形下，Ｂａｎａｃｈ空间的发展方程ｕ＇（ｔ）＋Ａ（ｔ）ｕ（ｔ）＝ｇ（ｔ，ｕ（ｔ））周期解的存在性，所得结果推广和加强了文〔６〕中的结论，将此结果应用于半线性地物型边值问题，获得了周期解的存在性。     

Discussion On the Semantics and Culture

ＤｉｓｃｕｓｉｏｎＯｎｔｈｅＳｅｍａｎｔｉｃｓａｎｄＣｕｌｔｕｒｅＷａｎｇＪｉａｎｗｕ（Ｄｅｐｔ．ｏｆＢ．Ｃ．ｏｆＳｈａａｎｘｉＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇｙ）Ａｂｓｔｒａｃｔ：Ｔｈｉｓｐａｐｅｒｆｏｃｕｓｅｓｏｎｈｏｗｓｅｍａｎｔｉｃｓ...     

一个带参数的非线性奇异边值问题

研究了带有正参数的非线性奇异边值问题［Ｋ（Ｖ（ｓ）＿ε）Ｖ＇（ｓ）］＇＋［ｓＮｇ（Ｖ（ｓ）＋ｆ（Ｖ（ｓ）］Ｖ＇（ｓ）＋ψ（Ｖ（ｓ）＝０；Ｖ（－∞）＝Ａ，Ｖ（＋∞）＝Ｂ（Ａ＜Ｂ）。它起源于一个二阶拟线性抛物方程的典型问题，在以下的假设（Ⅰ），（Ⅱ）之下，证明了此典型问题有唯一解ｕｃ（ｘ，ｔ）＝Ｖｃ（ｓ），ｓ＝ｘ／ｔ＾Ｎ，且该解逐点收敛于ｕ０（ｘ，ｔ）＝Ｖ０（ｓ）。     

Effects of Cholate on the Stability of Bacteriorhodopsin in Alkaline Solution

ＥｆｆｅｃｔｓｏｆＣｈｏｌａｔｅｏｎｔｈｅＳｔａｂｉｌｉｔｙｏｆＢａｃｔｅｒｉｏｒｈｏｄｏｐｓｉｎｉｎＡｌｋａｌｉｎｅＳｏｌｕｔｉｏｎ＊ＷａｎｇＪｕｓｈｕｏ（王居硕），ＸｕＱｉａｎｇ（许强），ＺｈａｏＮａｎｍｉｎｇ（赵南明）＊＊Ｄｅｐａｒｔｍｅｎｔｏ...     

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