聊城地区植物资源调查快报

聊城地区植物资源调查快报⒇黄勇钱关泽朱奇（聊城师范学院生物系，山东聊城２５２０５９）本文首次报道了聊城地区植物资源的类型及其数目．从１９９５年５月到１９９７年９月，我们通过对聊城地区八县市植物资源的全面调查，基本摸清了该地区植物资源的种类、分布和生长...     

福建水生药用植物资源的研究

通过对福建水生药用植物资源的调查,初步摸清了福建水生药用植物的种类、地理分布及其与生态环境的关系。在此基础上,分析了福建水生药用植物的区系成分和生活型,提出福建水生药用植物资源的合理利用与保护的意见,为进一步研究福建水生药用植物资源提供基础资料和有关的科学依据。     

广西桂林水生高等植物的概况

本文对桂林水生植物的种类、植物区系以及植被组成的特征作了概括性的探讨.结果表明,桂林水生高等植物种类较为丰富,而且具有明显的热带亚热带性质.在已知的31科53属82种植物中,苔藓植物1科1属1种,蕨类植物4科4属4种,被子植物26科48属77种,它们的生活型可分为挺水、浮叶、漂浮和沉水4个类型.桂林的水生植被根据组成植物种类及其生活型的差异分为沉水、浮水和挺水三个水生植被亚型14个群系,它们的分布具有一定规律性,而且具有世界分布和温带分布的性质.     

凌河高等植物初步调查

通过2013年6月末、10月末2次调查,在大凌河、小凌河的上、中、下游共采集到水生高等植物有15种,沿岸湿生植物34种。水生植物主要以单子叶植物纲眼子菜科的沉水植物为主。小凌河高等植物种类明显少于于大凌河。大凌河的高等植物种类呈现从上游到下游越来越少的变化规律,在一定程度上体现出大凌河从上游到下游环境质量下降的特点。河流沿岸的湿生高等植物物种丰富度低,且绝大多数为一年生植物,没有明显的优势种,说明凌河高等植物群落处于受干扰后恢复的演替初期。由于凌河受多种因素干扰的历史较长,群落结构亟待恢复。建议通过进一步的环境管理和工程措施促进水生、湿生植被的良性发展。     

凌河高等植物初步调查

通过2013年6月末、10月末2次调查,在大凌河、小凌河的上、中、下游共采集到水生高等植物有15种,沿岸湿生植物34种。水生植物主要以单子叶植物纲眼子菜科的沉水植物为主。小凌河高等植物种类明显少于于大凌河。大凌河的高等植物种类呈现从上游到下游越来越少的变化规律,在一定程度上体现出大凌河从上游到下游环境质量下降的特点。河流沿岸的湿生高等植物物种丰富度低,且绝大多数为一年生植物,没有明显的优势种,说明凌河高等植物群落处于受干扰后恢复的演替初期。由于凌河受多种因素干扰的历史较长,群落结构亟待恢复。建议通过进一步的环境管理和工程措施促进水生、湿生植被的良性发展。     

水生维管束植物分布与水质污染的相关性研究

水生维管束植物分布与水质污染的相关性研究苗明升，史风琴研究表明，利用生物可以监测和评价水体污染的性质和程度￣［１，２，３］，水生生物生活于水中，水体受到污染后理化性质的改变，直接影响到水生生物的种类和数量的变化．为探讨小清河水质污染对水生维管束植物的...     

贵州水生高等植物分布与经济用途

本文简述水生高等植物经济意义,记载了我省水生高等植物33科50属86种,并叙述各种植物形态特征、分布以及经济用途。     

福建龙湖水生植被

福建龙湖水生植被程静，张娆挺，曾文彬（生物学系）龙湖位于福建省晋江市龙湖镇，水域面积１６６．７ｈｍ２（正常水位时的水域面积），是福建省最大的天然淡水湖，也是福建省淡水鱼养殖的最佳场所之一，龙湖基本处于未开发状态．本文研究了龙湖水生植被种类和分布、水生...     

新疆特有高等植物的地理分布

特有高等植物的定义是分布区仅限于某一地区或仅生长在某种局部特有生境的植物种类．新疆特有高等植物的研究是新疆资源植物研究中的重要部分．本文通过对野外实习中采集的、吐鲁番沙漠值物园及标本室历年有的标本进行观察并查阅相关资料，根据“新疆植物志”中的高等植物和最近新发现的高等植物，进行收集和整理，进行系统综合描述，统计出新疆特有高等植物39科280种，被子植物34科268种，并列了了每一种的地理分布、生长环境、汉名、拉丁名（学名）、对照索引．     

神木县常见的四种蕨类植物简介

陕西神木县位于毛乌素沙漠南缘和黄土高原丘陵沟壑区交错地带,全年降水量400多毫米左右,而且雨量集中分布在7-9月,在这个干燥少雨的地区,植物种类偏少,象如蕨类植物这些喜欢潮湿环境的植物分布更少,可是,蕨类植物是植物中的重要类群,它是集高等植物,孢子植物、维管植物、隐花植物为一体的植物类型,在进行植物学,生态学教学和植物资源调查研究中都是不可缺少的。     

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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