松花江佳木斯江段水体中COD_（Cr）与COD_（Mn）相关关系研究

应用2009年松花江佳木斯江段丰、平两水期监测数据对CODCr与CODMn进行一元线性回归,得到回归方程,并经相关系数显著性检验,表明在95%的置信水平下CODCr与CODMn线性相关极其显著.     

宿州市主要河流污染的时空特征及水质评价

基于2004~2010年宿州市5条主要河流的水质监测数据,分析水体中污染物 CODMn、BOD5、NH3-N、CODCr、TN、TP的时空动态变化特征,并利用内梅罗综合指数评价法对水质污染状况进行了评估。结果发现：除TP以外,其他5类污染物质量浓度均呈总体下降的年际变化特征,而在年内变化方面,各污染物总体呈“上升-下降-上升”特征,质量浓度高值集中于3~6月份;6类污染物质量浓度最高值均出现在奎河杨庄断面,而最低值除CODMn出现在沱河东关闸断面外,其余5类污染物最低值均出现在新汴河泗县汴河桥断面。评价结果表明,研究期内各河流水体均受到不同程度污染,其中奎河水质最差,而新汴河和浍河水质较好,多数河流断面水质较2004年有明显改善,其中以沱河芦岭桥断面最为显著。     

滦河水中总有机碳(TOC)与化学需氧量(COD_(cr))相关性研究

总有机碳(TOC)与化学需氧量(COD_(cr))均为反映水体有机物污染情况的指标。当水体稳定时,总有机碳(TOC)与化学需氧量(COD_(cr))存在着一定的相关性。通过对滦河水近一年多的监测,得到相关数据。对二者的相关性进行线性回归分析,得出线性回归方程:y=2.780,2x+1.097,3,相关系数:R=0.929,2。对二者的相关性进行显著性检验,检验所得F值远大于F0.01(1,40),二者具有十分显著的相关性。因此可通过TOC值的测定来准确、快速反应出COD_(cr)值,及时反应出水质的变化。     

淮南潘集典型采煤沉陷积水区的水质变化规律

为解决采煤沉陷衍生的水环境问题,选取淮南潘集区典型的采煤沉陷区为研究对象,在现场踏勘的基础上,进行采样点位布设、样品采集与分析测试,分析地表水水质变化规律与影响因素,并采用W值水质评价法评价地表水水质.结果表明:研究区域监测时段内沉陷积水区地表水体中pH、F-、CODMn 、NH3-N、TP指标变化规律不明显,TN含量递减,CODCr先减小后增大;研究区域沉陷积水区地表水水质受降水等条件影响;淮南潘一、潘三矿采煤沉陷区积水区地表水水体质量较差,主要污染物为CODCr和TN.该研究为淮南采煤沉陷积水资源综合利用提供了依据.     

尔王庄水库高锰酸盐指数与化学需氧量的相关性的研究

通过对近两年尔王庄水库化学需氧量(CODCr)和高锰酸盐指数(CODMn)的监测,对二者的相关性进行了一元线性回归分析,得出二者的回归方程为y=3.823,x-2.067,1,相关系数R=0.908,7,对二者相关性进行了显著性检验,检验所得F值远大于F0.01(1,27)。因此二者具有十分显著的相关性。故化学需氧量(CODCr)可由高锰酸盐指数(CODMn)通过一元线性回归方程计算得出。     

嘉陵江重庆段营养盐空间变化特征及营养状态评价

为研究嘉陵江水环境的演变过程以及为嘉陵江环境治理提供依据和技术支持,对嘉陵江重庆段7个断面总氮(TN)、总磷(TP)、叶绿素a(Chla)、高锰酸盐指数(CODMn)、透明度(SD)、硝态氮(NO-3-N)、亚硝态氮(NO-2-N)、氨氮(NH+4-N)、总溶解态磷酸盐(TDP)进行2年的连续监测,对营养盐的空间变化特征进行分析,结合相关性分析,利用单因子法和综合营养状态指数法评价水体营养盐结构和营养状态。研究结果显示,研究区水体TN,TP,Chla,CODMn含量和SD差异较大,TN和TP的值远高于发生富营养化的阈值。相关性分析表明Chla与SD,TN,CODMn相关性不显著,与TP呈极显著负相关;SD与TN,TP,CODMn呈极显著负相关,TN,TP呈极显著正相关。利用单因子评价方法表明嘉陵江重庆段水体水质以II类为主,但由于草街水库的修建导致水体流速温度等变化,故虽然嘉陵江重庆段水体总体营养状态评价低于轻度富营养化阈值,但已发生水华爆发,应引起高度重视。
     

嘉陵江重庆段营养盐空间变化特征及营养状态评价

为研究嘉陵江水环境的演变过程以及为嘉陵江环境治理提供依据和技术支持,对嘉陵江重庆段7个断面总氮(TN)、总磷(TP)、叶绿素a(Chla)、高锰酸盐指数(CODMn)、透明度(SD)、硝态氮(NO-3-N)、亚硝态氮(NO-2-N)、氨氮(NH+4-N)、总溶解态磷酸盐(TDP)进行2年的连续监测,对营养盐的空间变化特征进行分析,结合相关性分析,利用单因子法和综合营养状态指数法评价水体营养盐结构和营养状态。研究结果显示,研究区水体TN,TP,Chla,CODMn含量和SD差异较大,TN和TP的值远高于发生富营养化的阈值。相关性分析表明Chla与SD,TN,CODMn相关性不显著,与TP呈极显著负相关;SD与TN,TP,CODMn呈极显著负相关,TN,TP呈极显著正相关。利用单因子评价方法表明嘉陵江重庆段水体水质以II类为主,但由于草街水库的修建导致水体流速温度等变化,故虽然嘉陵江重庆段水体总体营养状态评价低于轻度富营养化阈值,但已发生水华爆发,应引起高度重视。     

水质COD分析方法的比对研究

针对江河入海口通常采用重铬酸钾法(CODCr)方法,而大洋及近岸海水通常采用高锰酸钾法(CODMn),由于分析方法的不同使得监测结果不一致,从而使得入海污染物估算及海洋环境容量等研究无法衔接。开展CODCr和CODMn方法比对,更好地了解两个方法的异同点,同时对典型江河入海口进行COD采样监测,建立适当的校正关系式。得出:COD的测定受到氯离子的影响,氯离子浓度越高对COD值的测定影响越大;对江河入海污染物CODCr与CODMn监测结果存在一定的关系,但由于所测水样的典型性,不具有普遍应用性。     

濑溪河(荣昌段)污染状况分析及防治对策

对濑溪河(荣昌段)干流及濑溪河主要汇入河流水体进行调查分析,结果表明濑溪河(荣昌段)水体超标严重,超标因子有TN、CODCr和CODMn等.利用综合污染指数(K)法和水体富营养化评价法对濑溪河干流水质污染状况进行评价,结果表明濑溪河各采样点水体均属重度污染水体和富营养化水体,其中汤家河坝和洗选厂排污小河下游水体综合污染指数最高,其次为虹桥安置房处及泸县小河入汇处濑溪河水体.对汇入河流水体及其下游濑溪河干流水体相关指标进行相关性分析.结果表明,入汇河流水体和濑溪河干流水体之间存在较大的影响.并针对濑溪河复杂的污染来源,提出现实可行的综合防治对策,以有效及时的恢复其生态和环境功能.     

汾河景区水质富营养化评价分析

为了准确评价太原汾河景区水体所处的营养化状态，通过对汾河景区水体的水温、溶解氧、透明度、总磷、总氮、高锰酸盐指数、叶绿素a、藻类密度等重要污染指标进行测试，并使用综合营养状态指数法（TLI）对其富营养化状态进行评价分析，以了解现阶段汾河景区水体富营养化状况，为防止汾河景区水体富营养化提供必要的科学依据。     

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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