带Maxwell边界条件的定态迁移方程的临界本征值

在Ｌ１空间中证明了带Ｍａｘｗｅｌ积分型边界条件的定态球介质迁移方程临界本征值的存在性,并且给出了临界本征值的一系列分析性质。     

带Maxwell边界条件的定条态迁移方程的临界本征值

在Ｌ＾１空间中证明了带Ｍａｘｗｅｌｌ积分型边界条件的定态球介质迁移方程临界本征值的存在性,并且给出了临界本征值的一系列分析性质。     

一类积-微分方程边值问题的临界解

在Lp(1 p <+∞ )空间中证明了一类非齐次积—微分方程边值问题的主本征值的存在性 ,讨论了主本征值、主本征函数 (临界解 )的性质     

迁移理论中一类参数方程多群逼近的合理性

本文使田L~2空间的算子理论,分别研究了任意有界凸体和板几何中具各向同性,均匀介质的中子迁移的控制临界本征方程多群逼近的合理性,证明了原迁移系统的控制临界本征值及非负本征函数可由相应的多群迁移系统的控制临界本征值及非负本征函数逼近。     

具周期边界条件的中子迁移系统的临界问题

本文讨论了非均匀介质中具周期边界条件的稳态、平板中子迁移系统.证明了该系统的临界本征值与相应非负本征函数的存在性.     

一类控制临界本征方程的离散纵标逼近

本文研究了迁移理论中一类控制临界本征方程,我们以泛函分析为工具,使用Banach空间上的总体列紧算子理论,证明了近似计算控制临界本征值以及相应的非负本征函数的离散纵标方法的收敛性。     

板模型具广义周期边界条件的迁移系统的临界解

研究板几何具广义周期边界条件的迁移系统的临界解，使用泛涵分析方法，特别是Ｌ￣ｐ空间上的线性算子理论，１≤ｐ＜＋∞，证明了相在的Ｂｏｌｔｚｍａｎｎ积分算子主本征值（临界参数）的性质。获得了迁移系统处于次临界和超临界状态的条件，并证明了临界解的存在性。     

一类稳态中子迁移系统临界本征值的存在性

对一类具广义反射边界条件、能量连续变化、介质非均匀且可含任意空穴、散射和裂变各向异性的稳态中子迁移系统,本文利用L~2空间的算子理论,论证了临界本征值的存在性.     

基于隐式重启Arnoldi算法一维平板堆λ和瞬发α本征值问题谐波计算分析

中子平衡方程的谐波中子注量率及其本征值在中子时空动力学谐波展开法和外源驱动次临界反应堆中子学空间效应研究中有重要应用价值.本文推导了λ和瞬发α本征值问题的关系,并基于一维平板反应堆扩散问题,采用隐式重启Arnoldi算法(IRAM)进行了λ和α本征值问题计算.结果表明,给出的前10阶本征值数值与解析解符合较好,最大相对偏差小于3%;在λ本征值问题吸收截面中增加时间吸收项αp,n/v后,得到的n阶本征值λn均等于1,结果吻合λ和α本征值问题关系.本文工作证明了IRAM算法求解中子扩散方程本征值问题高阶谐波的有效性和λ和瞬发α本征值问题关系的正确性,为将IRAM方法拓展到多维、多群中子扩散方程奠定基础.     

板几何迁移系统的临界解（Ⅱ）

研究一类非均匀介质，各向异性的板几何迁移系统的临界解。籍助泛函分析方法，特别是Ｌｐ空间（１≤ｐ＜＋∞）上的线性算子理论，证明了积分算子的主本征值（即临界参数）的性质，并获得了系统处于次临界状态的条件以及使系统处于临界状态的平板厚度的存在性。     

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.     

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     

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

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