双相组织应变分配及强化行为

导出了反映双相组织变形特征的应变分配表达式，对影响各相之间变形差异诸因素进行了讨论，在此基础上导出了双相组织的强度表达式，并对一系列双相组织的强度进行了计算。结果表明，理论计算值与试验值吻合较好。     

基于灰色聚类分析的登陆台风次数预报

本文首次前期的预报因子进行计算,使灰色聚类分析具有了以预报功能,通过反复调整各因子的等级分界值,可以使登陆台风次数计算等实际等级的历史拟合率达到最大,其结果是比较好的,这对沿海地区的防这灾抗灾具有重要的现实意义。     

无梯度多参数自动历史拟合方法

通过历史拟合以降低油藏地质参数的不确定性,提出一种稳定高效的无梯度多参数最优化调参技术,根据贝叶斯统计理论建立历史拟合最小化数学模型,并利用奇异值分解算法进行降维分解,然后采用基于方向导数的无梯度算法对该最优化问题进行求解。该方法同时实现了渗透率、孔隙度、相对渗透率、原油黏度及水体参数的拟合,进一步降低了反问题的不确定性。与人工历史拟合结果相比,基于降维方法的自动历史拟合结果表现出高度的一致性,节省了大量的人力与机时,证明了该方法的有效性与正确性。     

单井三维三相黑油模型的建立及自动历史拟合的实现

建立了一个柱坐标系下的三维三相单井黑油模型，通过隐式压力隐式饱和度（ＩＭＰＩＭＳ）方法对模型进行求解。获得了稳定的压力和饱和度计算结果。在此基础上，建立了一个带约束条件的非线性目标函数，运用最优化方法使目标函数达到最小，实现自动历史拟合，从而反求得各地层参数值。另外还对大港油田三口测试井的测试资料进行了自动历史拟合，求得了各自的地层参数值，同时将本文求得的地层参数值与美国ＳＳＩ软件解释结果及电测解     

高压试验安全模糊综合评价方法研究

电气设备的高压试验大多属于破坏性试验， 容易引起设备故障和人身伤亡．为了评估实验室高压试验的 安全风险，运用层次分析法和模糊综合评价法，以试验环境风险因素、试验设备风险因素、人员素质风险因素、现场 管理风险因素、应急与事故风险因素为目标层建立安全指标评价体系， 并对新疆某高压实验室高压试验安全风险 进行了相应的定量计算．计算结果表明: 建立的三层评价体系， 经过一致性校验，CR 值均小于 0.1， 即证明所确定的目标层和准则层各影响因素权重是合理的; 监护制度管理和应急准备评分值最低， 说明该高压实验室高压试验安 全体系中监管体制不够严格，同时安全风险的应急准备不充分; 高压试验安全等级综合评价最终的综合评价值为 0.7181，表明该高压试验室安全风险管控处于安全的状态．该评价方法可为电力行业高压实验室高压试验安全管理 提供参考．     

基于集合卡尔曼滤波的非稳态油水相对渗透率曲线计算方法

提出一种基于半迭代集合卡尔曼滤波(EnKF)的自动历史拟合方法用于非稳态油水相对渗透率曲线的计算。进行高温、低界面张力体系作用下油水相对渗透率试验,利用半迭代EnKF历史拟合方法和JBN解析法进行数据处理,研究温度、界面张力对油水相对渗透率的影响。结果表明:利用半迭代EnKF历史拟合方法和JBN解析法所得结果区别较大,但从历史拟合的角度来看,半迭代EnKF方法结果更为合理;随着温度的升高,束缚水饱和度增大,残余油饱和度降低,油相相对渗透率升高,水相相对渗透率降低,相对渗透率曲线右移;随着界面张力的降低,束缚水饱和度和残余油饱和度都降低,油水两相共渗的范围变宽;新方法将驱油机制考虑到数学模型中,得到的相对渗透率曲线更适于在油藏数值模拟、生产优化等方面应用。     

杏十二区葡Ⅰ1~2层水聚同驱优化研究

建立了试验区块的地质模型,对试验区块水驱阶段和聚驱阶段进行历史拟合。分析了试验区葡I1-2层剩余油分布特征,结合研究结果,制定不同注水速度,注聚速度、注入浓度和不同聚合物用量注入方案,通过计算结果进行优选,最终获得合理的注水、注聚参数,应用此优化结果,在实际油田开发中取得了良好的效果。     

关于混凝土多边形非均匀受压区的等效矩形应力图探讨

本文首先分析推导出了混凝土多边形非均匀受压区等效矩形应力图的特征值，然后利用这些特征值对钢筋混凝土双向偏心受压构件的承载力进行简化计算，并与两个试验结果进行比较，计算值与试验值吻合较好。     

蛇纹石酸浸结果影响因素的正交多项式回归分析

利用正交试验法，考查了反应温度、反应时间、硫酸浓度和液固比等4个影响蛇纹石酸浸结果的主要因素。通过对实验结果进行正交多项式回归分析，建立了蛇纹石中氧化镁浸出率与反应温度(a，℃)、反应时间(b，h)和硫酸浓度(c，％)之间相关关系的回归方程，并通过该方程求得计算值与试验值之间的平均误差为4．21％。     

一种新型低剪力墙的试验研究

运用结构控制的概念，提出了一种新型低剪力墙──带竖向缝槽钢纤维高强砼低剪力墙，进行了一Ｐｉｎｇ带竖向缝槽钢纤维高强砼低剪力墙在低周反复荷载下的试验，对影响带竖向缝槽钢纤维高强砼低剪力墙的设计因素作了探讨，提出了受剪承载力的计算方法，计算值与合较好。     

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

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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