贫困大学生思想政治工作的思考

贫困大学生由于经济上、学业上、心理上的压力,影响着他们的身心发展.因此,及时有效地做好贫困大学生思想政治工作,具有重要的现实意义.实践中,主要应从政策上解决,物质上帮助,心理上疏导,思想上引导入手.     

三角矩阵的等价标准型

给出域上上三角矩阵的等价标准型.作为应用,证明了一个秩r上三角矩阵可分解为有限个秩s上三角矩阵的和,并证明了域上上三角矩阵环的每个理想都是主理想,且由唯一的约化标准上三角矩阵生成.     

加强大学图书馆员职业道德建设之我见

大学图书馆员的职业道德不能停留在计划经济时期的水平上,要适应市场经济的发展需要,进行新的转变,要在爱岗敬业上下功夫,在服务上下工夫,在求精上下功夫,在执行制度上下功夫,全面提高职业道德。     

基于FPGA的2D-Torus片上网络无死锁路由算法

片上网络的拓扑结构和路由算法直接影响片上网络的传输延迟和传输效率.基于2D-Torus拓扑结构,提出了一种新的片上网络无死锁路由算法.通过改变数据包在片上网络路由过程中受限制转弯的位置,保证片上网络的自适应路由条件,从而有效降低片上网络的延迟.在FPGA硬件平台上,设计并实现了基于该路由算法的2D-Torus片上网络,并对其进行测试.实验结果表明,基于该路由算法的片上网络,可以满足片上网络多方向数据通信及多路数据并行通信等性能要求.     

基于LDA模型和语义网络的线上文本挖掘方法

传统线上文本挖掘方法在克服相似性干扰时,需要加入大量约束条件,降低了挖掘准确率。为此,本文提出基于LDA模型和语义网络的线上文本挖掘方法。采用滤波处理法对线上文本信息进行滤波处理,获得线上文本的抗干扰向量,提取线上文本信息的频谱特征。利用语义网络构建线上文本的语义网络挖掘模型,计算线上文本挖掘信息的相似度。基于LDA模型对获取的线上文本阈值进行分类,得到线上文本挖掘权值,将挖掘到的关系词带入到概念属性内,实现线上文本的挖掘。实验结果表明,基于LDA模型和语义网络的线上文本挖掘方法不仅可以提高挖掘精度,还具有更强的收敛性。     

关于算子方程解的一个注记

讨论了数域K上有限维空间X到有限维空间Y上的线性算子与Km×n上的矩阵间的相互关系和相互表示形式,证明了数域K上有限维空间上的算子方程与代数方程的相互表示形式和它们解的等价关系,进而得到有限维空间上线性算子的不动点问题与线性空间Kn上的线性方程组的相互表示形式及它们解的等价关系,从而把数域K上有限维空间上的算子方程和不动点问题转化为线性空间Kn上的线性方程组的求解问题.     

贵州岩溶山区水资源系统性分析及新理念研究

在社会经济发展的进程中,水资源在各个经济领域和社会生活中占有极其主要的位置。水资源供需失调成为制约贵州岩溶山区经济发展的一个主要瓶颈。为解决贵州水资源紧缺,必须从水资源数量上、质量上、季节上、时空上、结构上、环境容量上、开发资金上、降水资源产业化上和科学技术上重新认识、更新水资源理念,提高节水灌溉效率。     

关于上三角矩阵代数上的导子系

设U=Tri(A,M,B)是上三角矩阵代数。利用算子论的方法讨论了上三角矩阵代数上的Jordan导子系,证明了上三角矩阵代数上的Jordan导子系都是上三角矩阵代数上的导子系,从而给出上三角代数上Jordan导子系的一种新的刻画。     

韩愈诗歌艺术风格浅议

韩愈诗歌具有狠重险硬、雄浑奇崛的艺术风格,具体表现为:语言使用上去熟就新,题材选择上出新出怪,意象营造上以丑为美,意境营造上雄浑奇崛,文势驾驭上跌宕起伏.艺术手法上出人意表.     

实数的确界定理和连续性公理在平面上的推广

由于平面上任意两点不可比较大小,导致了直线上成立的很多结论在平面上就很难成立,由此借助偏序集理论在平面上规定了一种全序,从而将实数的确界定理和连续性公理推广到平面上,得到了平面上相应的确界定理和连续性公理.     

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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