某丘陵地区火力发电厂干贮灰场排水系统设计

某丘陵地区火力发电厂干贮灰场的阻水区和灰场内雨水需要排放,并存在江水倒灌问题。通过介绍该某丘陵地区火力发电厂干贮灰场排水系统设计思路、排水建构筑物及设备、排水系统运行要求和注意事项,为类似工程干贮灰场区域排水提供参考、借鉴。     

燃煤电厂贮灰场环境地质问题

为了预测贮灰场环境地质问题,采用工程地质与水文地质研究方法,对选定的贮灰场场地进行了渗漏性评价,对贮灰场渗漏可能引起的环境地质问题进行了研究.结果表明:在两比选贮灰场中,磨其山贮灰场场区渗漏问题非常严重,由于渗漏引起的环境地质问题也比长立庄贮灰场严重,总的来说,长立庄贮灰场场址优于磨其山贮灰场.该成果对此类工程具有积极的指导意义.     

某电厂贮灰坝稳定性有限元强度折减分析

以某电厂贮灰场为例,采用有限元强度折减法和刚体极限平衡法对火电厂贮灰坝的现状稳定性进行校核,预测贮灰场达到最终库容时的稳定性。研究表明:不管现状水位还是达到最终库容时水位,贮灰坡体地下水不会从外坡坡面流出;贮灰坝在现状条件和贮灰达到设计容量时是稳定的,能满足贮灰场安全运行要求;建议对贮灰坝体内的地下水浸润线进行观测,加强坝体外坡坡面巡视。     

青年闸灰场灰坝加高渗流与稳定分析

文章对灰场粉煤灰材料、初期坝体材料和粘性土材料的工程特性进行了分析评价;采用有限元方法对电厂贮灰坝加高渗流与稳定性进行研究,揭示了贮灰坝渗流场和贮灰坝边坡稳定性规律,为灰坝的设计、施工、运行提供可靠的依据。     

贮灰场防渗层结构静力稳定性数值分析

从环境保护的角度出发,针对灰水溶质运移污染地下水的问题,应用研制的混合防渗材料作为防渗层,通过有限元程序模拟贮灰场的实际运行条件,进行了贮灰场静力计算分析。结果表明：防渗层在灰场运行期间,沉降变形、应力水平及应变均不大,可保证防渗层及贮灰坝的结构安全性。     

大型贮灰坝动力反应及液化分析

通过对某石化企业热电厂贮灰场粉煤灰的静力和动力三轴试验,分析了粉煤灰固结排水条件和固结不排水条件下的应力-应变关系、动模量与动应变关系和液化应力比与破坏振动次数关系.同时应用有限元软件ANSYS对加高后的贮灰坝进行了静力分析,以及在Park Field波作用下尾矿坝的动力反应,并采用应力对比分析方法对该贮灰场进行了液化分析,说明相对密度对液化区面积有很大影响,相对密度越小,液化区越大.因此控制粉煤灰的相对密度对贮灰坝的液化稳定是非常必要的.     

金昌电厂后建灰坝现状调查分析

文章介绍了金昌电厂后建灰坝建筑结构及周围气候条件,详细分析了贮灰坝前水位偏高和贮灰场使用方面存在的问题和原因,指出了灰坝继续运行会导致的问题。并针对灰坝存在的隐患提出了稳妥的处理建议。     

神华河曲煤矸石发电工程建设对周边区域地下水环境影响分析

分析了神华河曲煤矸石发电工程项目厂址建设期与运行期对区域地下水环境的影响以及紫房庙沟贮灰场贮灰后对周边区域地下水环境的影响。     

浅谈山谷干灰场的运行与管理

通过对山谷干灰场运行管理的阐述,介绍了干灰场的卸灰、推平及碾压作业,强调了灰场运行管理对环境保护的重要性。     

火力发电厂贮灰场的岩土环境工程问题

从环境保护的角度出发，结合已有的测试和研究成果，论述了火力发电厂贮灰场涉及的岩土环境工程问题，指出粉煤灰对大气和水源的污染是贮灰场建设和运行中亟待解决的主要问题，也是岩土环境工程学科的重要研究内容。     

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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