堤防截渗墙加固对圩区地下水水质的影响

为了研究圩区堤防截渗墙封闭率对圩区内地下水水质的影响,以江西省赣抚圩区大堤为研究对象,通过野外试验分析,并运用Visual MODFLOW计算软件对大堤在截渗墙不同封闭率条件下地下水水质的变化趋势进行了数值模拟.结果表明:现状封闭率(0.75)不会造成地下水中总氮累积超标,封闭率的合理选择可以缓和堤防加固与圩区水环境之间的矛盾.     

水电站群总装机容量最优分配的数学规划分析法

本文从水电站装机容量与计算支出之间呈曲线关系的一般情况出发，提出数学规 划分析法求解水电站群总装机容量的最优分配，远比动态规划、线性规划求解简单。     

赣江下游平原圩区农村生活污染入河系数研究

以赣江下游平原圩区为研究对象,采用随机抽样的方式,进行农村生活污染入河过程问卷调查.调查区域包括赣江下游圩区内12个乡镇、42个行政村,共发放147份问卷.结果表明,赣江下游平原圩区水文过程特殊,农村生活污染并不能直接排入赣江干流水体,其对干流水体污染主要来自于圩区内电力排灌站的汛期排涝.对问卷进行统计分析,估算排入圩区内受纳水体的农村生活污染入河系数:CODCr为9.6％～11.9％,TN为14.1％～14.3％,TP为12.9％～13.7％.提出的入河系数估算方法客观反映了农村生活污染主要入河过程及其特征,降低了入河系数估算的不确定性.     

水电站群装机容量分配的多目标模糊优化方法

多目标模糊优化方法能够反映各个单目标最优解与多目标满意解之间的相互关系，能较好地同时考虑多种影响因素。本文针对水电站群装机容量分配的多目标性，利用模糊优化理论，探讨提出了水电站群装机容量分配的多目标模糊优化方法，并通过算例验证了方法的可行性。     

温润地区平原圩区产流机制研究

圩区广泛分布于我国南方大河的中下游沿江和滨湖地区，是重要的农业生产基地，但由于该地区低洼，地下水埋深浅，洪，涝渍灾害特别严重给农业生产带来不利。因此开展洪预报和在治理至为重要而降雨径流计算是其首要解决的问题。从分析圩区自然地理特性和产流机制出发，建立了适合圩区的产流模型。其物理概念明确，结构简单合理，参数易于调试。对上海青浦县香花试验区１０场降雨径流模拟分析表明，模型较为可靠。     

水电站装机容量的重新思考

通过分析我国电力系统负荷变化、水电的特点及水电在电力系统中承担调峰任务的巨大优势,以华东电网的现状为例,重点分析了我 国水电站装机容量确定原则与我国电力系统调峰需求的矛盾,提出了电力系统成本最优的水电站装机容量选择原则,通过峰谷不平衡电价等反 映不同时期电量价值的不同,最后,通过实例研究该原则对水电站装机容量确定的影响,对我国大型水电站装机容量的确定提出新的思考。     

对《无调节水电站装机容量选择的一种方法》一文的讨论

华水学报83年第一期发表了黄炳照、陈金水两同志的《无调节水电站装机容量选择的一种方法》(以下简称"黄陈文").文中提出用综合系数选择无调节(甚至年调节等)水电站装机容量的方法.作者认为最优的装机容量,应该是使     

处理好防洪建设与水环境建设的关系

吴江地处江浙沪交界处,位于太湖下游,上游承泄浙江天目山来水,下游出水不畅,并受黄浦江潮水顶托,境内地势低洼平坦。80%以上的地面高程低于汛期一般洪水位,境内以圩区为主,洪涝威胁较大,防洪处于被动状态。随着本地区经济社会的快速发展,对水环境造成较大污染,局部地区水质比较差,水质型水资源缺水现象已有发生,水污染防治、水环境整治问题越来越突出,而且治理任务非常艰巨。因此,新时期吴江水利要正确处理好防洪建设与水环境建设的关系,实行防洪工程优先,在解决防洪问题的同时,坚持以人为本,统筹兼顾,综合治理水环境。     

关于中顺大围内河涌整治的几点思考

中顺大围存在内河支堤普遍低矮、部分河涌宽度缩减、水质不断恶化等问题，面对这个形势，中顺大围提出的“内河涌高水位运行。形成自然水体流态来改善围内水环境”的河涌管理调度思路。本文作者根据这个思路，总结及分析了中顺大围内河涌的现状及存在问题，并进行了认真思考．提出内河涌整治的重点在于河涌水环境整治。     

鹤地水库文官至石角段水环境容量研究

建立了鹤地水库文官至石角段的河网区水量、水质计算模型，根据实测资料对模型中水质降解系数进行了率定；利用率定的降解系数值，模拟水环境容量计算公式，计算了鹤地水库文官至石角段的水环境容量；利用上述河网区水量、水质模型，以及规划期的污染源排污预测值，对2010年文官至石角段的水质进行预测，水环境容量计算结果和水质预测结果表明，至规划期，排污量预测值可满足该段水环境容量的要求，水质可满足该段水环境功能区的要求。     

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