铁钉、战马与王朝

在英国民间流传着这样一首歌谣：缺了一枚铁钉,掉了一只马掌;掉了一只马掌,失去一匹战马;失去一匹战马,损了一位骑兵;损了一位骑兵,丢了一次战斗;丢了一次战斗,输掉一场战役;输掉一场战役,毁了一个王朝。     

爱德华·诺顿·洛伦茨 蝴蝶效应创始人

西方流传的一首民谣说：丢失一个钉子,坏了一只蹄铁;坏了一只蹄铁,折了一匹战马;折了一匹战马,伤了一位骑士;伤了一位骑士,输了一场战斗;输了一场战斗,亡了一个帝国。民谣传递出,马蹄铁上一个钉子的丢失,＂长期＂作用下去就可能是一个帝国的灭亡。我国人们常说：＂千里之堤溃于蚁穴＂。所以我们重视防微杜渐,因为看似一些极其微小的事...     

一户一表管理方式的探讨

本文阐述了一户一表的优点，分析了一户一表改造的资金来源，探讨了一户一表的管理方式。     

人类历史上的神奇转折点

一座大楼倒了,导致了好几个国家政权的灭亡;一个司机偶然拐错了弯,导致了一场世界大战;一块岩石不经意间断裂,导致了一次强烈的地震;森林中的一次闪电,导致了一场来势汹汹的森林大火,蝴蝶翅膀轻轻扇动几下,导致了一场狂风暴雨……"9·11"改变世界格局10年前的9月11日,这个日子并不特别,但这一天在美国     

关于太原市自来水供水"一户一表"工程的探讨

针对太原现有的水资源状况,分析了“一户一表”改造工程的必要性和迫切性,简介了“一户一表”改造工程的内容和步骤,探讨了“一户一表”改造工程中应注意的问题。     

第一场雪

昨天，下了一夜的雪。这是今年的第一场雪。屋外白茫茫的一片，地上像是铺上了一层厚厚的、软软的地毯，脚踩上去发出“咯吱咯吱”的响声；松树穿上了一层又一层雪白的棉袄，像一座座白塔；公共汽车顶上都落满了雪，仿佛抹了白色的奶油似的……这场雪下得真好啊!     

蝴蝶效应

一年一度的"安全生产月"如期展开,安全这个话题虽老生常谈,却能常谈常新。今年的主题是"关爱生命,安全发展"。气象学有个著名的"蝴蝶效应":亚马逊河流域热带雨林中一只蝴蝶,偶尔煽动几下翅膀所引起的微弱气流的影响,甚至可能在两周后引起美国得克萨斯州的一场龙卷风。西方还有一个民谣说:少了一枚钉子,坏了一只铁蹄,折了一匹战马,伤了一位骑士,输了一场     

生物体中一碳单位的代谢

本文介绍了一碳单位的概念、来源和转运 ,阐明了一碳单位的相互转变及生理功能 ,指出了一碳单位代谢异常及一碳单位与药物治疗的关系     

动物的警告

埃博拉病毒被科学家所关注是从1976年9月29日开始的。这一天,比利时安特卫普的一所微生物学实验室接收了一份来自非洲国家刚果（金）的血液样本包裹,这一血液样本是从刚果埃博拉附近一种流行病患者体内采集的。这位患者是在刚果工作的一位比利时修女,她感染上了一种奇怪的病,并被诊断为疑似黄热病．她尽管接种了全部疫苗,最终还是死亡了。     

新生与梦想

2009年的钟声敲响,送走了2008年,迎来了新的一年与新的梦想. 过去一年,是风起云涌的一年、悲喜交织的一年、极不平凡的一年.     

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