呼伦贝尔草原野生豆科牧草资源及植物生态地理区系分析

对呼伦贝尔草地野生豆科牧草的属种组成、生长习性、饲用价值及植物区系进行了研究.结果表明:呼伦贝尔草地现有豆科植物17属64种.这些豆科牧草的生长型中多年生草本植物有52种,占总种数的81.25％;水分生态型中各类中生种类有53种,占总种数的82.81％;大多数种类对典型草原和丘陵草甸草原生境的适应性良好;优等和良等牧草...     

贵阳市野生种子植物区系研究

贵阳市野生种子植物共有179科763属2 264种,区系统计分析表明:区系组成复杂,类群丰富;温带性质稍强于热带性质,热带亚热带成分与温带成分相互交融;起源古老,并兼有年轻成分;优势科明显,单种属和少种属较多;中国特有种丰富.     

重庆武隆白马山自然保护区观赏植物资源及区系分析

对重庆武隆白马山自然保护区观赏植物资源及区系进行了研究,结果表明:①保护区观赏植物资源较为丰富,有维管植物143科380属749种;②保护区观赏植物有4种生活型,其中乔木155种,灌木299种,草本246种,藤本49种;③保护区观赏植物优势科、属明显;④保护区观赏植物地理成分比较复杂,起源古老;⑤保护区种子植物区系在科级水平上具有明显热带性质,在属级水平上具有明显温带性质.     

恩施百户湾木本植物区系研究

对百户湾的木本植物区系统计表明,野生木本植物种类丰富,有87科218属465种,植物区系起源古老;特有属和单种、少种的科、属多;区系类型复杂,植物地理成分以热带和温带的成分居多,具亚热带向温带过渡的特点.     

七里海古泻湖湿地植被特征及其植物物种多样性研究

为了更好的了解七里海古泻湖湿地植被的现状,有效保护植物资源,采用样方法调查和分析了湿地植物的物种和区系组成、生活型构成、群落结构及其多样性特征.结果表明:(1)七里海湿地植物较为丰富,共69科、200属、290种,以草本植物占优势;(2)地理成分多样,除去世界分布属后,泛热带成分和北温带、旧世界温带成分占极大优势,湿地植物属的区系地理成分为显著的温带性质和一定数量的热带性质;(3)群落复杂多样,划分为5种植被型,计有22个典型群落,农作物、人工林、部分野生灌木和草本群落的多样性水平普遍高于野生藤本植物群落和水生植物群落,人工干扰改变了湿地植物多样性性质.     

七里海古泻湖湿地植被特征及其植物物种多样性研究

为了更好的了解七里海古泻湖湿地植被的现状,有效保护植物资源,采用样方法调查和分析了湿地植物的物种和区系组成、生活型构成、群落结构及其多样性特征.结果表明:(1)七里海湿地植物较为丰富,共69科、200属、290种,以草本植物占优势;(2)地理成分多样,除去世界分布属后,泛热带成分和北温带、旧世界温带成分占极大优势,湿地植物属的区系地理成分为显著的温带性质和一定数量的热带性质;(3)群落复杂多样,划分为5种植被型,计有22个典型群落,农作物、人工林、部分野生灌木和草本群落的多样性水平普遍高于野生藤本植物群落和水生植物群落,人工干扰改变了湿地植物多样性性质.     

凉水原始红松阔叶林种子植物区系研究

探讨了凉水原始红松阔叶林自然保护区区系特点.凉水原始红松阔叶林属于长白植物区系,植物种类丰富,共有种子植物80科243属444种.最大的科是菊科,共有植物48种;植物种类超过20种的科有杨柳科、毛茛科、蔷薇科、禾本科、莎草科等.属于这些科的植物共有152种,占凉水种子植物种类总数的34.23%.裸子植物1科4属6种;被子植物79科239属438种,其中双子叶植物63科188属352种,单子叶植物16科51属86种.植物分布区类型分析表明凉水原始红松阔叶林内种子植物可分为4大类性质的区系成分,共有16个分布型16个变型,种类成分较复杂,区系性质为温带性质,特有种所占比例较高,区系古老,区系来源为温带区系成分.     

晋城野生药用种子植物区系分析

晋城位于太行山南端,中条山东段,是山西植物种类最多的地区,也是山西生物多样性最丰富的地区.晋城有野生药用植物610种,隶属于365属100科,其中裸子植物3科,3属,5种,被子植物97科,362属,605种（双子叶植物85科313属541种,单子叶植物12科49属64种）.晋城野生药用植物属的区系成分类型多样,具有明显的温带色彩.温带成分占绝对优势,达238属,占总属数的74.38%（其中北温带成分126属,占总属数的39.38%）,在植物区系和植被组成中具有重要作用.野生药用植物种的区系成分中,中国特有种占优势,达185种,占总种数的31.30%,其中油松、野皂荚、连翘等是构成晋城野生药用植物分布区森林植被和灌丛植被的建群种和优势种的主要成分.     

河南省野生藤本植物区系分析

河南省野生藤本植物共有160种(包括变种),隶属于25科46属,基本特点是小型科属和单种科属较多,而大型科、属较少.区系成分分析表明,东亚和北美间断分布成分在各种成分中居首位,占21.74%,泛热带成分占19.57%,东亚成分为15.22%,热带亚洲成分为10.87%.河南藤本植物属的区系成分统计表明,热带成分温带成分大致相当,各类热带成分占总属数的43.48%,各类温带成分占总属数的43.48%.     

漳卫南运河德州段种子植物区系分析

通过调查研究,漳卫南运河(德州段)河道范围共记录种子植物35科91属118种.超过10个种的科有:菊科21种,禾本科16种,区域性单种科达13科.区域种子植物以广布科和泛热带至温带分布科居多,广布科共计15科57种,分别占种子植物科和种的42.86%和48.31%;泛热带至温带分布的科共10科20种,分别占种子植物科和种的28.57%和16.95%;属的区系分析中温带区系成分占据很大优势,为44属,占总属数(除世界分布)的63.77%,另外热带分布属24属,占总属数的34.78%.表明该区域种子植物区系有明显的温带性质,并有热带边缘区系成分.     

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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