分布函数属于D(A)吸引场的充要条件

通过考虑D(Λ)与Γ函数的关系得到判断分布函数F是否属于D(Λ)的两个充要条件: 1．(1)若F∈D(Λ),则对任意的αi>0,m>1有 (■) (2)若存在某αi>0,m>1,使得 (?) 那么 F∈D(Λ) 2．若分布函数F(x)有密度函数F′(x),且F′(x)在上端点的某一个左邻域内非增,则F(x)∈D(Λ)当且仅当 1/F′(x)∈Γ．     

正规弱(θ-)-可加空间的逆极限

证明了如下结果:设X=lim←{Xσ,πσρ,Λ},|Λ|=λ,并且每个投射πσ:X→Xσ是开满射,(1) 若X是λ-仿紧的并且每个Xσ是正规弱(θ-)-可加空间,则X是正规弱(θ-)-可加空间; (2) 若X是λ-仿紧的并且每个Xσ是遗传正规的遗传弱(θ-)-可加空间,则X是遗传正规的遗传弱(θ-)-可加空间.     

Subortho-紧空间的逆极限性质

证明了如下结果:设X=lim←{Xσ,πσρ,Λ},|Λ|=λ,并且每个投射πσ:X→Xσ是开满的,(1)若X是λ-仿紧的并且每个XσSubortho-紧空间,则X是Subortho-紧空间:(2)若X是遗传λ-仿紧的并且每个Xσ是遗传Subortho-紧空间,则X是遗传Subortho-紧空间.     

传统直言命题的制的逻辑剖析(英文)

传统直言命题A、E、I、O作为“命题形式”其逻辑语义没有规定清楚，逻辑结构尚未完全定型，因而至今还存在种种逻辑理论上的问题．我们根据主词S外延的不同将传统直言命题二分为外延命题和内涵命题两大类．当直言命题的主词S的外延是可进一列举的有限集时为外延命题．与A、E、I、O相对应的外延命题依次为：P(e1)ΛP(e2)Λ…ΛP(ei)Λ…ΛP(em),P(e1)ΛP(e2)Λ…ΛP(ei)Λ…ΛP(em),P(e1)∨P(e2)∨…∨P(ei)∨…∨P(em)，P(e,)∨P(e2)∨…∨P(ei)∨…∨P(em)．当主词S的外延是无限集、不可进一列举的有限集或空集时为内涵命题．与A、E、I、O相对应的内涵命题依次为：S（x）P（x）、S（x）P（x）、S（x）！P（x）、S（x）！P（x）．已经验证了，四种外延命题和主调可空而不自相矛盾的四种内涵命题全都满足传统的推理格式．     

Rb2（1Λg）高位态的预解离和碰撞转移过程

池温控制在519-548K之间,在不充任何缓冲气体的纯Rb样品池中,Rb原子密度在4-8×1015cm-3范围,Rb2分子的粒子数密度数量级为1014,利用YAG脉冲激光器的680nm激光双光子激发Rb2的X1Σg+态至1Λg高位态.利用激光感生荧光光谱法研究Rb2(1Λg)+Rb(5S)→Rb(6 D,8S)的预解离和碰撞转移.在不同的Rb原子密度下探测1Λg→B1Πu的时间分辨荧光,得到不同Rb密度N时1Λg态的有效寿命.利用Stern-Volmer方程,看出有效寿命的倒数与Rb密度成线性关系,从直线的截距和斜率分别得到1Λg→B1Πu辐射寿命与预解离率之和及总的碰撞截面.用光子计数器测量时间积分荧光强度I3[Rb2(1Λg→B1Πu)],I2[Rb(8S→5P3/2)]和I1[Rb(6 D→5P3/2)],从直线的斜率和截距并结合从Stern-Volmer方程得到的结果,确定Rb2(1Λg)的预解离率,ΓP8S=(6.5±0.6)×106 S-1,ΓP6 D=(4.1±0.3)×106 S-1和碰撞转移截面σ8S=(7.9±0.7)×10-13cm2,σ6 D=(6.2±0.3)×10-13cm2.     

正规弱■-可加空间的逆极限

证明了如下结果:设X=lim←{Xσ,πσρ,Λ},|Λ|=λ,并且每个投射πσ:X→Xσ是开满射,(1)若X是λ-仿紧的并且每个Xσ是正规弱θ-可加空间,则X是正规弱θ-可加空间;(2)若X是λ-仿紧的并且每个Xσ是遗传正规的遗传弱θ-可加空间,则X是遗传正规的遗传弱θ-可加空间。     

l^∞（R）中的平均σ-宽度

本文讨论l^∞(R)中的平均σ-宽度的(p，q)问题，并得到(1，2)问题的一个精确结果。     

质子—空气非弹性截面和质子—质子总截面对能量的依赖

在超高能宇宙线实验情况下,质子空气非弹性截面σｐａｉｒｉｎ和质子质子总截面σｐｐｔｏｔ由强子流强在大气中的衰减长度Λ导出．用改进方法分析宇宙线数据．结果表明,在１０１５和１０１９ｅＶ之间σｐａｉｒｉｎ随能量的增加为２９０Ｅ０．０５４±０．０５ｍｂ,σｐｐｔｏｔ随能量的增加为３８．５＋０．４１ｌｎ２（Ｓ／１００ＧｅＶ）ｍｂ．实验数据暗示,在膝附近σｐａｉｒｉｎ和σｐｐｔｏｔ随能量的增长率可能比原认为的快．     

Non-Carathéodory域中重点为无穷缺项函数系{z~(τ_n)log~(s_n) z}的逼近

若B是包含单连通区域B_l(l=1,2,…,s)的Non-Carathéodory域,即B=s∪l=1B_l.Λ={τ_n:n=1,2,…}是一个复数序列.令Λ_1={τ_n,s_n}~∞_(n=1),其中s_n是τ_n的重点,并且满足s_n=0,1,…,m_n-1.Λ_1={τ_n,s_n}~∞_(n=1)是Λ={τ_n:n=1,2,…}的重新排序.研究了当n趋于无穷时,s_n趋于无穷的条件下,函数系{z~(τ_n)log~(s_n) z}在L~p(B)空间中的逼近问题.     

引力"常数"和宇宙"常数"为变量的FRW平坦模型解

本文在引力“常数”G和宇宙“常数”Λ为变量，同时保持Einstein引力场方程形式不变的框架下，讨论了Friedman—Robertson—Walker(FRW)平坦模型的解．我们假设了一个状态方程P=(γ一1)ρ和宇宙常数与哈勃参数的关系Λ=3ηH^2，得到了场方程的一个精确解。它描述的是一个减速系数为常数的连续膨胀的宇宙，在极端情况下η=0，这个解可以自动变为大家熟知的G是常数和Λ=0时的FRW平坦模型的解。     

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     

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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