九龙江流域土壤—蔬菜系统中重金属的迁移,分布,积累

研究了九龙江下游地区７种重金属元素（Ｚｎ，Ｃｄ，Ｃｒ，Ｍｎ，Ｐｂ，Ｎｉ，Ｃｕ）在土壤－蔬菜系统中的分布，积累规律，土壤污染指数，土壤和蔬菜的Ｃｄ／Ｚｎ比值，蔬菜对重金属元素的吸收率，富集率，结果表明该区土壤中Ｃｕ，Ｚｎ，Ｃｄ三种不元素污染较严重，多个样点的土壤污染指数大于１，而元素Ｐｂ仅两个样品的污染指数接近于１，区内样点的Ｃｄ／Ｚｎ值均小于１％，Ｃｄ在蔬菜体内积累未达到危害程度，蔬菜对重金属元素     

九龙江流域土壤－蔬菜系统中重金属的迁移、分布、积累

研究了九龙江下游地区７种重金属元素（Ｚｎ、Ｃｄ、Ｃｒ、Ｍｎ、Ｐｂ、Ｎｉ、Ｃｕ）在土壤－蔬菜系统中的分布、积累规律，土壤污染指数，土壤和蔬菜的Ｃｄ／Ｚｎ比值，蔬菜对重金属元素的吸收率、富集率．结果表明该区土壤中Ｃｕ、Ｚｎ、Ｃｄ三种元素污染较严重，多个样点的土壤污染指数大于１，而元素Ｐｂ仅两个样点的污染指数接近于１，区内样点的Ｃｄ／Ｚｎ值均小于１％，Ｃｄ在蔬菜体内积累未达到危害程度，蔬菜对重金属元素吸收率、富集率随不同样点而异．     

大鹏湾沉积物重金属污染的初步研究

用电感耦合等离子焰光谱技术测定大鹏湾４个采样站位沉积物岩芯中Ｐｂ，Ｍｎ，Ｎｉ，Ｃｒ，Ｃｄ和Ｆｅ，Ｍｇ，Ｚｎ，Ｃｕ，Ｃｏ共１０种重金属元素的浓度－深度关系，并根据相应的沉积速率分析了该海域的污染史．     

煤中三态硫与痕量元素关系之研究

分别测定了青山烟煤和莱阳无烟煤化学脱硫前后的煤粉及不同比重的青山烟煤粉中三态硫和部分痕量元素的含量．发现煤中Ｃｕ，Ｃｏ，Ｃｄ，Ｐｂ，Ａｓ和Ｂｅ等元素含量与三态硫有密切的相关关系．煤粉经５ｍｏｌ／ＬＨＣｌ和１∶７ＨＮＯ３化学脱硫处理后，灰粒中Ｃｕ，Ｃｏ，Ｃｄ，Ｃｒ和Ｐｂ等元素含量显著减少．由此可知，煤粉化学脱硫不仅可减少煤燃烧对大气中ＳＯ２污染的影响，同时也可减少对大气重金属污染的影响．     

煤中部分重金属元素与三态硫关系的回归模型

通过分别测定不同比重段的青山烟煤煤粉中部分重金属元素Ｃｄ，Ｃｏ，Ｐｂ，Ｃｕ和Ｎｉ以及三态硫的含量，采用回归分析法经交互验证建立了这些重金属元素与三态硫关系的模型。该模型对青山烟煤不同比重段煤粉中的重金属元素含量的预报结果令人满意。     

太原市地表土中五种重金属元素的污染监测及评价

该文研究了太原地区现阶段地表土中五种重金属元素的含量、分布规律，污染程度、污染原因及各元素间的相互关系。结果表明：Ｃｕ，Ｃｄ，Ｚｎ三元素含量超了中国土壤背景值；Ｃｕ，Ｃｒ，Ｚｎ，Ｍｎ四种元素城区平均含量高于郊区；Ｃｄ的城区平均含量低于郊区，且污染严重，范围广达１００％；元素间相关系数达显著水平的有１０对，最为密切的为Ｃｄ与Ｚｎ，ｒ＝０．８８８。     

山西省科技情报研究所馆藏文献文摘

山西省科技情报研究所馆藏文献文摘环境科学Ｘ５３太原污灌区土壤重金属污染研究〔刊〕／张乃明…（山西省农业环保监测站）∥农业环境保护——１９９６．１５（１）．２１～２３太原市污灌区污水属轻度污染，被测三种重金属元素只有Ｃｄ超过农灌水质标准，污染顺序为Ｃｄ...     

城市大气重金属(Pb,Cd,Cu,Zn)污染及其在植物中的富积

通过对烟台市区不同大气污染区域绿化植物叶片中重金属Ｐｂ ,Ｃｄ ,Ｃｕ ,Ｚｎ 富积量和大气与土壤中相应重金属的含量研究分析发现,植物叶片中重金属Ｐｂ ,Ｃｕ 和Ｚｎ 的富积量与大气中Ｐｂ ,Ｃｕ 和Ｚｎ 的相对含量呈显著的正相关,而植物叶片中Ｃｄ 的富积量与大气中重金属的相对含量相关不显著．所研究的４ 种重金属在植物叶片中的富积量与其生长土壤中的重金属的含量无相关性．研究证明,在所调查的５ 种市区绿化植物中以园柏（ Ｓａｂｉｎａ ｃｈｉｎｅｓｉｓ） 叶片对大气中Ｐｂ 和Ｃｄ 的富积能力最强,对Ｐｂ 的富积依次为侧柏（ Ｐｌａｔｙｃｌａｄｕｓｏｒｉｅｎｔａｌｉｓ） 、冬青卫茅（ Ｅｕｏｎｙｍｕｓｊａｐｏｎｉｃｕｓ） 、悬玲木（ Ｐｌａｔａｎｕｓ ａｃｅｒｉｆｏｌｉａ） 和樱桃李（ Ｐｒｕｎｕｓｃｅｒａｓｉｆｅｒａ） ,而对Ｃｄ 则依次为侧柏、冬青卫茅、樱桃李、悬玲木．悬玲木叶片对Ｃｕ 和Ｚｎ 的富积量最高,对Ｃｕ 的富积能力依次为悬玲木＞ 园柏＞ 侧柏＞ 冬青卫茅＞ 樱桃李,对Ｚｎ 则为悬玲木＞ 园柏＞ 侧柏＞ 樱桃李＞ 冬青卫茅．市区大气重金属污染物主要为Ｐｂ ,Ｃｕ 和Ｚｎ ．市区大气重金属污染的总态势依次为发电厂＞ 汽车站＞ 市府区＞ 奇山小区＞     

城市大气重金属（Pb,Cd,Cu,Zn）污染及其在植物 …

通过对烟台市区不同大气污染区域绿化植物叶片中重金属Ｐｂ,Ｃｄ,Ｃｕ,Ｚｎ富积量和大气与土壤中相应重金属的含量研究分析发现,植物叶片中重金属Ｐｂ,Ｃｕ,Ｚｎ的富积与大气中Ｐｕ,Ｃｕ,Ｚｎ的相对含量呈显著的正相关,而植物叶片中Ｃｄ的富积量与大气中重金属的相对含量相关不显著,所研究的４种重金属的在植物叶片中的富积量与其生长土壤中的重金属的含量无相关性,研究证明,在所调查的５种市区绿化植物中以园叶片对大气     

煤燃烧中重金属释放的化学控制研究

采用形态分离法,研究了硫酸钙、氧化钙、铝土矿三种固体吸附剂在煤燃烧过程中对痕量重金属元素Ｃｄ,Ｐｂ,Ｃｏ,Ｃｕ,Ｎｉ释放的化学控制,结果表明,三种吸附剂地重金属元素具有一定的捕获力,三种吸附剂地重金属元素的吸附既有物理吸附,又有吸附剂与重金属之间的化学反应。     

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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