基于经典线性码构造的纠缠辅助量子码

首先， 利用有限域F_q上参数为［n,k,d］经典线性码C的线性互补对偶(LCD)线性子码的一个正交基, 构造一类参数为［［n+l,k-h,d′;n-k -h+l］］的纠缠辅助量子码, 其中h=dim(Hull_E(C)), 0≤l≤k-h, d≤d′≤d+l. 特别地, 当经典线性码C为Euclide对偶包含线性码时, 存在一个参数为［［n+l,2k-n,d′;l］］的纠缠辅助量子码, 其中0≤l≤2k-n, d≤d′≤d+l. 其次, 通过对有限域F_q上参数为［n,k,d］的Euclide对偶包含线性码C的校验矩阵H作一类变换, 构造另一类参数为［［n+l,2k-n+l,d′;2l］］的纠缠辅助量子码, 其中0≤l≤n-k, d≤d′≤d+l.     

一类二阶四元数方阵保左谱的线性映射表示

设 Q 表示四元数集合，Mn （Q）表示 n ×n 四元数矩阵的集合。对于四元数右线性映射Φ（A）＝UAU －1或Φ（A）＝UAT U －1：M2（Q）→ M2（Q），若σl Φ[（A ]）＝σl （A），则四元数酉阵 U 是实数矩阵。     

半群PO_n中理想的非群元秩和相关秩

设POn是有限链[n]上的保序部分奇异变换半群.对任意的r(2≤r≤n-1),考虑半群M(n,r)={α∈POn:|Imα|≤r}的非群元秩和非幂等元秩.证明了M(n,r)是由秩为r的元素生成的.确定了当0≤l≤r时,半群M(n,r)关于其理想M(n,l)的相关秩.     

具有有限总曲率子流形的L~2调和p形式（英文）

设M是n+l维S~(n+l)球空间中具有法从平坦n维完备子流形,则H~p(L_2(M))是M上L~2调和p(2≤p≤n-2)形式空间.首先证明了如果M的总曲率小于一个正常数,则H~p(L~2(M))是平凡的;其次证明了如果M的总曲率有限,则H~p(L~2(M))是有限维的.     

线性运算子值域的维数

设E是一个Banach空间,用(E)表所有的映EλE的线性运算子y=U(x) 所组成的集合。U(E)表E在U作用下之像,dim U(E)表U(E)之维数。 M.Eidelheit曾得出下面的结果(见[1]): 设U_o∈(E).则dim U_o(E)≤1之充要条件为以于每一U∈(E),都存在一数λ,使 (UU_o)~2=λUU_o.(1) 本文的目的是要将M.Eidelheit的结果作在某种意义下的扩充,我们得出下面两个     

在超立方体Qn中通过给定三条边的所有圈

本文研究了在超立方体Qn中通过给定三条边的所有圈的问题．证明了：设E0包含E（Qn）且｜E0｜=3≤n．由E0导出的子图是线性森林，则在Qn中E0的所有边包含在长为l的偶圈中，其中l是满足2n＋2≤l≤2^n的每个偶数．并且下界2n＋2是最优的．     

线性子空间的并集完全不覆盖的基

在n维线性空间V中,对于有限个真子空间的并集M,都存在V的一个无穷子集U使得M完全不能覆盖U,并且U中的任何的n个元都是V的基。在不可数数域上的n维线性空间V中,对于可数个真子空间的并集M,都存在V的一个无穷子集U使得M完全不覆盖U,并且U中的任何的n个元都是V的基。在n维欧氏空间V中,对于可数个真子空间的并集M,都存在V的一个可数的无穷子集所作成的序列U,使得M完全不覆盖U,并且U中含有V的标准正交基,U中任何的,n个相连的元都是V的基；对于任何的正整数m,V有m个标准正交基完全不被M覆盖。     

具有有限总曲率子流形的L2调和p形式(英文)

设M是n+l维S^n+l球空间中具有法从平坦n维完备子流形,则H^p(L₂(M))是M上L²调和p(2≤p≤n-2)形式空间.首先证明了如果M的总曲率小于一个正常数,则H^p(L²(M))是平凡的;其次证明了如果M的总曲率有限,则H^p(L²(M))是有限维的.     

一类带p-Laplacian算子的分数阶耦合系统在共振条件下的边值问题

应用葛渭高的Mawhin延拓定理的外延理论,证明了当dim Ker M=2时解的存在性定理,其中M为构造的拟线性算子.并给出了例子,验证这个定理.     

三角代数上的Jordan零点高阶ξ-Lie可导映射

设U=Tri(A,M,B)是一个2-无扰的三角代数,{φn}n∈?是U上的一列线性映射.用代数分解方法证明:如果对任意n∈?,U,V∈U且U°V=0,有φn([U,V]ξ)=∑i+j=n[φi(U),φj(V)]ξ,ξ≠0,±1,则{φn}n∈?是一个高阶导子,其中[U,V]ξ=UV-ξVU为ξ-Lie积,U°V=UV...     

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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