火力发电厂灰渣场的植物分布

芜湖发电厂灰渣自然定居的植物共30种,隶属于14科29属.主要包括菊科、禾木科等,多为适应性强的草本植物.风播是其繁殖体的主要来源.灰渣场不良的物理性质、极端贫瘠和重金属浓度过高是限制植物定居的主要因素.     

安源煤矿煤矸石山优势植物及土壤中重金属含量研究

以安源煤矿煤矸石山为研究对象,对南方地区煤矸石山自然定居植物及其土壤中Cu、Zn、Pb、Cd含量进行调查研究。植被调查结果表明,该煤矸石山自然定居的植物有18种,其中草本植物14种,灌木3种,乔木1种,煤矸石山自然定居植物以灌木和草本植物为主。植物体内重金属含量调查表明,南牡蒿Cd含量达2.32 mg/kg,白茅Pb含量达41.9mg/kg。同时对Cu、Pb、Cd具有耐性的植物有蕨,对Pb、Cd具有耐性的植物有南牡蒿、苎麻、山莴苣、蕨。18种植物都对Pb表现出耐性。土壤重金属含量分析表明,土壤中Cu、Pb的污染程度达国家土壤污染重金属一级标准。Cd的污染程度超过国家二级标准。Zn则处于正常水平。     

鄂西南国家重点保护植物名录及特点分析

经调查鄂西南有国家重点保护野生植物４８种（包括栽培１０种）,其中一级１１种（包括栽培４种）,二级３７种（包括栽培６种）;国家珍稀濒危保护植物５６种（包括栽培１０种）,其中一级３种,二级２２种（包括栽培５种）,三级３１种（包括栽培５种）。对其名录特点,分布特点和利用价值进行了分析。     

TH16TG4550056硬面技术的应用

ＴＨ１６ＴＧ４５５００５６硬面技术的应用［刊］／桂业炜（上海长宏粉末冶金新材料研究所）／／机械制造──１９９５，（２）．８～１０ＴＨ１６ＴＧ４５５硬面技术是一种金属表面强化技术，包括热喷涂、喷焊和堆焊。本文论述了硬面技术的原理及在改善零件性能、降低生...     

中、低角区煤的X射线衍射特点初探

本文首次较为系统地研究了不同变质程度的煤，在低角区和中角区的Ｘ射线衍射特点。指出随着变质程度的提高，１６×１０－（１０）ｍ峰和（００２）峰强度逐渐增高，而γ带强度降低，低变质煤未见１６×１０－（１０）ｍ峰，高变质煤中γ带不明显；随着变质程度提高，１６×１０－（１０）ｍ峰、γ带峰、（００２）峰的晶面间距均减小，１６×１０－（１０）ｍ峰减小幅度较大，（００２）峰减小幅度较少。基于以上分析，对其形成机理进行了初步探讨。图６，参７。     

岩溶石山废弃采石场自然恢复早期的植被动态

对广西田阳岩溶石山废弃采石场自然恢复早期阶段的植被动态进行研究,结果表明:采石场废弃地的维管束植物有60种,隶属22科54属,其中草本植物有44种,灌木16种.早期定居的植物主要是菊科和禾本科的草本植物,其中飞蓬、马唐、飞机草、扭黄茅、艾蒿和鬼针草在群落中占绝对优势;恢复5年后逐渐出现桂野桐、马樱丹、红背山麻杆、黄荆、盐肤木等耐旱的阳性灌木.随着自然恢复进程,植被覆盖率和物种多样性提高,群落结构发生变化,由单层结构发展为两层结构.加快废弃采石场植被的恢复进程,必须采取人工措施.     

陵川山区野生植物资源研究

陵川山区共有维管植物５２５种，依用途将它们分为１０类，即（１）药用植物；（２）观赏植物；（３）油脂植物；（４）芳香植物；（５）淀粉及果树植物；（６）纤维植物；（７）野菜类植物；（８）鞣料植物；（９）蜜源植物；（１０）饲料植物。同时对植物资源的保护及利用提出建议。     

早春草本植物群落结构及其聚类分析

以红松阔叶林内早春草本植物为研究对象,根据不同的采伐时间及采伐强度设置10条1 m×100 m的调查样带,分析了早春草本植物的组成及结构特征,并结合TWINSPAN分析探讨了择伐干扰对早春草本植物数量特征的影响.调查结果表明:研究区内早春草本植物群落共有23科63属73种植物,其中包括早春植物12种,主要为毛茛科、百合科和罂粟科植物;早春开花植物14种,早春展叶植物47种.早春植物、早春开花植物及早春展叶植物物种数占总物种数的百分比随择伐干扰后恢复时间的变化较小,物种数比例接近5∶4∶11.早春草本植物总个体数随着恢复时间的增加整体上呈下降趋势.采伐强度增大导致早春草本层物种多样性、丰富度和均匀度下降.TWINSPAN划分结果较好地揭示了采伐干扰与早春草本植物群落结构以及环境条件之间的关系.     

杭州和普陀岛陆生贝类调查分析

杭州和普陀岛的陆生贝类共计２亚纲１０科１７属３１种,包括杭州２０种,普陀岛１６种,而两地兼有仅５种,说明岛屿与大陆的陆生贝类区系组成有差异．杭州的石灰岩区域比非石灰岩区域,陆生贝类种类多,每平方米生物量或密度也较高．蛛形环肋螺 Ｐｌｅｃｔｏｔｒｏｐｉｓ ａｒａｎｅａｔｅｌａ（Ｈｅｕｄｅ）（巴蜗牛科）是浙江新记录种．     

山西湿地野生植物资源研究

山西有着丰富的湿地植物资源,共有维管束植物８３科３０８属６８６种,其中蕨类植物８科１０属１８种,双子叶植物５６科２２３属５０４种,单子叶植物１９科７５属１６４种。按照经济用途,它们可分为７类：（１）药用植物４６种、（２）鞣料植物２０种、（３）淀粉及糖料植物２３种、（４）芳香植物２６种、（５）油料植物１２种、（６）纤维植物２４种和（７）饲用植物９６种。最后,提出了山西湿地植物资源保护利用的对策。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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