回调函数的C++封装

回调函数是应用程序参与操作系统运行的一个非常重要的接口，在DirectX Play开发过程中，经常需要使用到回调函数，直接使用回调函数显得复杂麻烦。介绍了用C 完成回调函数的封装的方法，使回调函数的处理变得容易。     

关于基于近似次梯度的非光滑优化束方法的对偶问题的研究

利用目标函数值和近似次梯度,构建了非光滑无约束优化问题目标函数的一个下近似模型,通过对该近似模型取极小寻找下一个可能使目标函数值下降的试探点.利用Lagrange函数写出了原近似问题的对偶问题,揭示了原近似问题的最优解与对偶问题最优解之间的关系,并进一步分析了相应的近似次梯度的某种凸组合与目标函数在当前迭代点的次微分以及目标函数的近似模型在当前迭代点的近似次微分之间的所属关系.所得结果为原近似问题的求解开辟了新思路,也使整个外层束方法的执行变得简单易行.     

基于动态规划法的成品油管道管径优选

成品油管道工艺方案优化设计的目标是使所设计的管道在其计算期内经济效益最佳，由于影响工艺方案的因素较多，设计人员通常期望能够通过优化的方法获得多个预选方案，然后就一些影响因素和工程实际情况进行具体分析后，再确定最优工艺方案。以成品油管道系统计算期内总费用现值最小为目标函数，建立了管径优选数学模型，并应用动态规划法进行了求解。在求解时，把泵站投资表示为水力摩阻的函数，使得求解变得简单方便。具体的实例结果表明，同其他方法相比，应用动态规划法能够同时求解出最优和次优工艺方案，所得结果可以用于多方案比选。     

带有模糊数的多优先级多目标优化

针对目标函数中带有模糊数的多优先级多目标优化问题，采用单侧变可行域优化方法，通过人机交互，给出了满意的优化结果．仿真实例表明，该方法既可以保证各个目标函数较好地优化，又可以保证目标函数之间的优先级要求．     

平面度目标函数单谷性的研究

提出了一种通过几何分析与电算法，证明平面度目标函数为单谷函数的方法，解决 了完全用纯数学的方法难以解决的问题，为正确地优化计算平面度目标函数提供了理论 上的依据，也为论证圆度、圆柱度目标函数的单谷性提供了类似的方法。     

双正交小波的构造

由于多重尺度函数两尺度序列为矩阵序列，使得由尺度函数构造小波函数变得非常困难。通过引入多相矩阵的方法，给出了由紧支撑多重a(a∈Z,a≥2）惊讶双正交尺度函数构造双正交多小波的一种算法。该方法仅需用线性代数的知识可实现，较已有的方法简单易行。     

时变最优化信息处理技术及其应用(Ⅰ)——基本思想与系统辨识

分析了时变目标函数及其最优解的时变性能，提出了跟踪时变目标函数最优解的一阶和二阶方法，其中二阶方法能使时变目标函数最优解的跟踪以指数速率收敛。     

导函数极限的存在性及函数可导性关系初探

在讨论函数在某一点的可导性时，通常的做法是利用导函数的定义或用函数在该点的左、右导数来讨论，过程比较复杂，为了寻求一种简便的方法，总结出下面一组关于导函数极限的存在性与函数可导性间关系的命题，利用这两个命题，能使相应问题的讨论变得比较简单。     

模拟退火方法的改进及其在地震剩余静校正中的应用

分析了模拟退火非线性反演方法随机寻优的特点，提出了一种改进的具有较高计算效率的模拟退火方法，该方法采用数论中的均匀试验设计方法来建立候选解在解空间的均匀分布，少量的目标函数计算就能了解目标函数解空间性质，减少了目标函数的计算次数．理论和实际计算表明该方法具有较高的计算效率。     

半线性椭圆方程在非凸容许控制集上最优问题的二阶分析

给出了半线性椭圆方程在非凸容许控制集上最优控制问题的二阶分析，主要创新在于控制集合是非凸集，需要对控制函数做“针状变分”，得到二阶必要条件，重新讨论目标泛函J(u)的二阶泰勒展开式，因此上述问题变得更加精细并有意义。     

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

正~~     

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