长乐市乡镇集中式饮用水源富营养化评价

对长乐市乡镇集中式饮用水源(水库)进行水质调查,采用综合营养状态指数法对营养指标进行富营养化评价.结果表明:2012年11月,调查水库CODMn浓度范围为2.55～3.75mg/L,TN浓度范围为0.63～0.89mg/L,TP浓度范围为0.03～0.05mg/L,Chla范围为1.9～3.5 mg/m3,SD范围为0.88～1.05m,各乡镇集中式饮用水源目前处于中营养状态,整体水质良好.     

贵州高原水库富营养化特征及评价

调查了贵州省20座代表性水库的营养水平。总磷、总氮、叶绿素和透明度分别是0.01~0.63 mg/L、0.48~7.75 mg/L、1.60~130.11 mg/m3和0.30~8.00 m。根据这4个因子综合加权营养状态指数在32.40~72.80之间,季节差异较大,枯水期水质好于丰水期,枯水期大多数水库处于中营养状态,在丰水期富营养状态的水库明显增多。珠江流域的水库水质明显好于长江流域水库水质。     

团泊水库水环境状况调查及生态修复措施探讨

为开展水库健康养殖,2007年5—11月对团泊水库的理化指标和水生生物学指标进行了调查.结果表明:水体中无机氮浓度的变化范围在2.04～4.45mg.L-1之间,磷酸盐浓度的变化范围在0.014～0.220mg.L-1之间,有机物耗氧量在8.3～27.5mg.L-1之间,透明度的变化在22～50cm之间.浮游植物以适宜在富营养水体中生长的种类为主,共检出浮游植物优势种类11种(属),主要由在蓝藻门、绿藻门和硅藻门的种类组成.浮游植物生物量的变化在26.61～85.79mg.L-1之间,春夏两季的生物量高于秋季.细菌数量变化在2.68×107～4.36×10 8CFU.L-1之间,夏季最高,春季最低.依据不同营养类型湖泊主要指标评价,团泊水库水体已进入富营养状态.本研究分析了团泊水库发生富营养化的原因,讨论了水库富营养化的危害,提出了水环境生态修复措施.     

贵州高原红枫湖水库富营养化特征分析

红枫湖水库是云贵高原峡谷型人工深水水库,为了解该水库水质状况及其富营养化特征,于2010年度对红枫湖水库水质进行逐月监测。结果表明：调查期间红枫湖水库的总氮、总磷、叶绿素a、透明度的平均值分别为1．83mg／L、0．034mg／L、12．7μg／L和2．3m,氮／磷的质量比为55．4,综合营养状态指数为42,指示该水库...     

钦州湾近岸海域六月富营养化水平评价

【目的】调查及评价钦州湾近岸海域夏季海水富营养化水平状况。【方法】2010年6月采集钦州湾近岸海域15个站位的海水样品,测定海水中化学需氧量(COD)、无机氮(DIN)、活性磷酸盐(PO4-P)等的浓度;采用单因子污染指数法对污染程度进行评价,采用海水富营养化指数法以及潜在富营养化程度评价模式对海水富营养化水平进行评价。【结果】钦州湾近岸海域夏季海水中COD平均浓度为1.00mg/L,DIN平均浓度为0.12mg/L、PO4-P平均浓度为0.01mg/L。单因子污染指数法评价结果显示,钦州湾近岸海域海水中COD浓度符合国家一类海水水质标准;DIN浓度超标率为20%;PO4-P浓度超标率为20%。海水富营养化指数法评价结果显示,钦州湾海域海水富营养化指数平均值为0.47;海水潜在富营养化程度评价模式评价结果显示,钦州湾海域海水营养级别为Ⅱ级。【结论】钦州湾近岸海域海水受无机氮及活性磷酸盐污染;海水富营养化水平为贫营养;钦州湾近岸海域海水富营养化程度主要受陆源污染物及海水养殖影响。     

浉河信阳市段水质富营养化调查与治理措施

对浉河信阳市段水质富营养化进行为期一年的跟踪调查,调查结果表明,浉河信阳市段富营养程度较严重,其中NO-2-N0.3874 mg/L,NO3-N2.438 mg/L,NH+4-N2.943 mg/L,TN5.453mg/L,PO34-P0.567 mg/L,TP0.793 mg/L,并在此基础上,提出了治理河富营养化的措施.     

宁夏星海湖湿地水质监测及生态系统健康评估

在对星海湖湿地湖水水质调查取样分析的基础上,建立湿地生态系统评价指标体系,用PSR模型和AHP分析法对星海湖生态健康状况进行综合分析评价.结果表明,星海湖水体整体污染级别为"轻污染",水质为Ⅵ类;星海湖的营养状态较差,综合营养指数为57.268;星海湖各采样点的浮游植物生物量为6.2～22.3mg/L、平均值为14.71mg/L,浮游动物生物量为0.02～0.06 mg/L、平均值为0.055 7 mg/L,底栖动物生物量平均值为13.55g/m2;星海湖湿地的生态系统健康综合指数为0.228 0,处在不健康状态.     

夏秋季珠江口水域COD、DO、营养盐分布特征及其富营养化评价

在2012年夏季(8月)和秋季(11月)对珠江口海域进行化学需氧量(COD)、溶解氧(DO)和氮磷营养盐调查分析,并研究了其分布特征,采用富营养化指数法和潜在性富营养化法对珠江口水体营养化状况进行了分析和评价.结果显示,珠江口海域COD质量浓度较低,夏季平均值为1.85 mg/L,秋季为1.10 mg/L;DO质量浓度较高,夏季平均值为6.95 mg/L,秋季为7.63 mg/L;无机氮污染严重,平均质量浓度夏季为0.85 mg/L,秋季为0.79mg/L,总体上从北向南递减;无机磷秋季平均质量浓度(0.015 mg/L)显著低于夏季平均质量浓度(0.010 mg/L).富营养化严重海域主要集中在东北部及伶仃洋一带,基本呈自北向南逐级递减趋势.秋季富营养化程度显著高于夏季,珠江口海域基本上属于磷限制潜在性富营养水平.     

丹江口水库营养程度分析评价及富营养化防治研究

选取丹江口水库丹库和汉库的15个监测断面,采用相关加权综合营养状态指数评价法,对2018年丹江口水库水体营养状态进行了逐月评价,同时对相关水质参数包括高锰酸盐指数、总磷、总氮、透明度和叶绿素a等营养状态参数的权重结果进行了分析. 结果表明:2018年丹江口水库总体呈中营养状态,综合营养状态指数范围为31.9~37.9,汉库高于丹库. 其中汉库中心、柳陂镇山跟前2个监测断面在7—8月份接近轻度富营养化;总氮和叶绿素a是影响丹江口水库水体营养程度最重要的2个参数,其次是总磷和透明度,高锰酸盐指数对水库水体营养程度影响较小. 在营养状态分析和评价的基础上,提出了丹江口水库富营养化防治的对策建议,包括加强水库管理、构建生态过滤净化技术措施、开展水库总氮控制和藻类防治科学研究.      

我国主要水库富营养化现状评价

对我国主要水库的富营养化现状调查结果表明,水库水质总体状况堪忧,并不同程度地发生了富营养化.被评价的135座水库中贫营养型水库38座,中营养型水库40座,富营养型水库57座,分别占调查水库总库容的17.6%,45.4%,37.0%.如不采取相应的措施,水体富营养化将日趋严重.     

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     

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