甘肃省桦木科植物的分类和分布

研究和整理了甘肃省桦木科植物,确定本科植物在甘肃分布有６属、２２种、６变种,并记载了每个种的产地和分布,为开发利用甘肃桦木科植物资源提供了科学依据。     

中国昆仑山委陵菜属植物分类学研究

通过野外考察和标本查阅鉴定,对昆仑山地区蔷薇科委陵菜属（Potentilla L.）植物的形态分类学研究表明：中国昆仑山蔷薇科委陵菜属植物共计5组33种13变种,占中国委陵菜属组数的83.3%和种数的39.8%。发现青海委陵菜属新记录种7种,新疆委陵菜属新记录种1种。该区委陵菜属植物中有中国特有种11种,昆仑山特有种1种,中国新疆仅分布种1种,特有种与仅分布种共占36.4%。     

甘肃槭树科植物初步研究

中国槭树科植物在已出版的《中国植物志》第46卷中得以整理,然而,到目前为止,甘肃槭树科植物尚未进行全面整理,为了合理开发利用该科植物,以及为科研、生产提供更多的资料,作者利用教学之余,对该科植物在甘肃的种类、地理分布等作了初步的整理。现已知甘肃有槭树科植物2属,24种,10变种,3亚种;其中含有1新变种,3个分布新记录种和2个分布新记录变种。并将甘肃所产槭树科植物编制成检索表。     

攀西地区蔷薇属植物资源及其开发利用价值

蔷薇属植物是攀西地区数量最多、分布最广的野生花卉、水果及药用植物资源之一.本文根据野外调查、文献资料及国内部分标本馆的查询,报道攀西地区该属野生植物资源种类40种5变种,并简述了其利用价值、资源开发面临的问题.     

甘肃贝母属植物分类学研究

根据作者在甘肃的野外调查,以及查阅各有关标本室的标本和文献资料,对甘肃贝母属植物进行了分类学研究,归并了６新种和４新变种１个新栽培变种,确认甘肃贝母属有６种１变种（伊贝母Ｆｒｉｔｉｌｌａｒｉａ ｐａｌｌｉｄｉｆｌｏｒａ;渐贝母Ｆ．ｔｈｕｎｂｅｒｇｉｉ;榆中贝母Ｆ．ｙｕｚｈｏｎｇｅｎｓｉｓ;甘肃贝母Ｆ．ｐｒｚｅｗａｌｓｋｉｉ;暗紫贝母Ｆ．ｕｎｉｂｒａｃｔｅａｔａ;太白贝母Ｆ．ｔａｉｐａｉｅｎｓｉｓ;     

青海,甘肃,宁夏地区的轮藻植物及两新种

本文报道了青海、甘肃、宁夏的轮藻植物,计有3属、11种和1变种,其中的拟球状论藻Chara pseudoglobularis Zheng et Han sp.nov.密刺轮藻Chara densispina Han et Zheng sp.nov。为新种,其它为本地区新记录。     

天水红叶树种种质资源

甘肃天水市麦积区植物种类繁多,有高等植物171科847属2500多种,其中乔木312种,灌木512种。据调查,本区有红叶树种资源50种（包括变种,变形）,隶属15科23属。     

北京北沙河湿地维管植物区系的研究

北京北沙河湿地有维管植物87种5变种1变型,共93个分类群,隶属于36科68属.其中蕨类植物1科,1属,3种;双子叶植物23科,40属,53种,1变种;单子叶植物12科,27属,31种,4变种,1变型.可分为10个分布区类型,包括世界广布属23属,热带属13属,温带性质的属32属.     

植物志后时期内蒙古被子植物区系研究进展

本文综述了《内蒙古植物志》第二版出版以来内蒙古被子植物区系的研究进展.结果表明,在此期间取得了以下研究进展:(1)发现内蒙古被子植物新记录属8个,更名植物属2个,从原隶植物属分出而独立的植物属3个;(2)新定名发表25新种、1新亚种、15新变种、2新变型;(3)发现新记录44种、2亚种和2变种;(4)对原有的30种、1亚种、10变种和1变型进行了订正.在植物志后时期,内蒙古被子植物区系研究取得了显著进展,为《内蒙古植物志》第三版的编著奠定了坚实的基础.     

山西省的鞘藻属植物

对山西省的鞘藻属植物进行了鉴定,共得该属植物１４种２变种,其中８种２变种为山西省新记录。     

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