潍坊市沿海地区卤水资源的开发利用与管理

针对卤水资源在开发利用和管理中存在的区域性降落漏斗、淡咸水分界线南移、卤水质量浓度下降等问题,在分析研究区水文地质条件的基础上,运用非稳定流法和地下水数值模拟方法,进行卤水开采优化布局,提出3.56×108m3/a的开采规模及7.5年开采年限,为实现卤水资源的合理开发利用提供理论依据。     

太原市地下水水位变化的分析

介绍了太原市区地下水位的动态变化规律。分析了受开采影响形成地下水降落漏斗的演变趋势及严重超采地下水所引起的水文地质环境恶化问题。指出随着引黄入并以及对部分地段禁采和限采区的实施可缓解地下水资源紧缺状况。     

滨州市咸水入侵机理研究

分析深层地下水资源构成及40年来深层地下水水动力场、水化学场和开发利用状况,认为过量开采是深层地下水位持续下降和降落漏斗形成的主因,地下水降落漏斗的快速扩展是成水入侵的根本原因.采用解析法计算两个约束条件下深层地下水的允许开采量2 001.9 m3/a.提出了限量开采、回灌补源等防止成水入侵的措施.     

太原市地下水资源可持续利用与地质环境保护

太原市是中国北方严重缺水的城市之一，长期以来，深层地下水作为主要供水水源，以人工管井方式集中开采；缺水不仅严重制约了太原市经济的发展，而且加剧了地下水超采，引发了岩溶泉水断流、大面积降落漏斗、地面沉降、地下水水质污染等环境地质问题，今后地面沉降还有加剧的趋势．引黄工程对解决太原市水资源短缺和缓解环境地质问题将起到一定的作用，但其水质、水量不稳定，水价能否保证取水用户少用或不用自备井水，还需要在实践中探索．分析了太原市水地质条件，地下水开发利用现状，指出当前应重视并着力解决的环境地质问题，提出了相应的地下水资源可持续利用与地质环境保护措施，对太原市地下水资源可持续发展具有重要意义。     

山西水资源开发利用中的若干问题与对策

山西省水资源匮乏,而且呈逐年减少的态势,煤炭开采对水资源及水环境的破坏日益严重对地下水资源的过量开采引起地下水位大幅度下降,废污水排放造成的地表水及地下水的严重污染,使山西有限的水资源更为紧张,而水资源开发利用技术的落后及管理的混乱,使山西水资源形势更加严峻。针对以上问题提出了相应的对策。     

地下水开发利用与生态环境保护

从3个方面对地下水开发利用与生态环境的关系进行了阐述：一是介绍了地下水开发利用现状及存在的主要问题。二是分析了不合理开发地下水对生态环境的影响，如地下水过量开采，形成了大范围的地下水降落漏斗；地下水位大幅度下降引起地面沉降；岩溶大泉流量不断减少甚至断流等。三是提出了合理开发利用地下水，保护和改善生态环境的对策。     

定西市地下水开采引起的环境地质问题及对策

定西市城市供水主要依赖于西部的内官-香泉盆地地下水。本文从定西市城市供水水源地水文地质特征和地下水动态分析入手,指出由于长期的超量开采导致地下水位急剧下降,定西市城市供水水源地已面临地下水资源枯竭等环境地质问题。如何有效的利用地下水资源,以满足定西市城市经济的可持续发展已成为十分紧迫问题。除了采取节水措施,提高水资源的利用率外,跨流域调水是中远期解决定西城市供水的有效对策。     

石嘴山市环境地质问题及地质环境质量评价

本文简要论述了石嘴山市地质环境的主要特征,对地下水开采降落漏斗、地下水污染、地质灾害和土壤盐渍化等主要环境地质问题的现状、产生和危害进行了阐述。选取地下水开采降落漏斗、地下水污染、地质灾害和土壤盐渍化4种因子,运用模糊综合评判方法进行地质环境质量评价,将研究区分为地质环境质量良好区、中等区和较差区。     

凹陷式开采石灰岩矿区地下水渗流数值模拟

露天凹陷式开采石灰岩矿区的疏干降水过程将形成降水漏斗,并改变区域地下水流场;定量刻画开采条件下的地下水渗流对矿区涌水量预测及相关环境地质问题防治有重要的实际意义。以广东某石灰岩矿区为例,采用地下水渗流数值模型模拟了矿坑开采速度分别为4、5、8 m/a条件下的地下水流场变化过程。模拟结果表明：在开采条件下,研究区地下水位不断降低,水位下降速率与开采速度之间呈正相关关系;开采形成的降落漏斗将延伸至矿区所在水文地质单元边缘,形成时间与速度成反比;区域范围内的地下水位年内动态与降雨季节变化一致,波动幅度随与矿坑距离增加而减小、随渗透系数降低而增加,但受开采速度影响不明显。开采初期,矿坑涌水量随开采深度和开采速度增加而增大;但当矿坑开采深度达40 m时,研究区浅层第四系孔隙水和溶洞裂隙水基本疏干,涌水量基本不再随开采深度增加,以4、5、8 m/a速度开采的矿区稳定涌水量分别为7 970、8 240、9 030 m³/d。该研究结果可为类似石灰岩矿区开采方案设计及周边地下水位动态监测提供参考。     

山西省地下水资源可持续利用的战略对策

从可持续发展的高度,概述了山西省地下水开采现状及超采状况（１９９３年）,分析了由于地下水超采引起的地下水位下降、漏斗的扩展和造成的地面沉降等一系列环境水文地质问题。并遵循可持续发展的思想,提出地下水资源可持续利用的战略对策,以促进山西省国民经济的持续发展。     

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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