纤维球过滤器+钠离子软化器在平凉地区农村地下水处理中的应用

地下水在我国农村饮用水中占有重要的比例,随着人们生活水平的提高,改善其水质和安全饮水问题日益凸显。本文就纤维球过滤器+钠离子软化器工艺,用于改善平凉地区农村地下水水质,从水处理设备的流程、工艺等方面进行了阐述,对所该工艺的运行结果和取得的经济效益进行了分析,结果表明该工艺出水水质稳定、设备投资费用低,占地面积小,在进水水质发生变化时,出水水质变化范围较小,适合当地环境条件下使用,很好的改善了当地农村水质与饮水安全问题。     

污水深度处理技术及其联合使用

介绍了目前污水深度处理较常使用的4种技术,包括高效沉淀技术、转盘滤池、反硝化深床滤池和活性砂过滤器,列举了两种高效沉淀工艺联合使用的实例。实践证明,高效沉淀技术通常被作为第一级深度处理工艺,将两种高效沉淀技术结合使用后,出水水质能完全满足污水处理厂出水一级A的出水标准。     

大梯度磁滤处理饮用水源微污染的试验研究

以水厂现场试验为依据,对影响磁滤器处理效果的各项因素进行了分析.结果表明磁滤器处理效果与磁场强度、滤速、沉淀出水密切相关.它对水中污染物,尤其是细菌和有机物具有很好的去除效果,与传统工艺相比有机物去除率平均提高34.21%,最高达68.8%,出水水质优于传统水处理工艺的出水.     

双膜法水处理工艺在冶金污水回用系统的应用

双膜法（超滤+反渗透）水处理工艺具有出水水质好、易于实现自控、占地面积小、节水环保等特点；文章重点介绍了双膜法工艺在邯钢污水回用系统中的应用情况。     

膜技术在制水工艺中的应用研究

传统的水处理过程中常采用混凝-沉淀-过滤-消毒的处理工艺,随着饮用水水质标准的提高,该工艺已经不能满足人们对饮用水的要求。膜处理技术是目前应用最多的水处理技术。本文介绍了膜技术和膜分离技术的相关内容,并且就膜技术在制水工艺中的应用进行了阐述。     

屠宰废水回用处理工程

针对屠宰废水有机物高、悬浮物高、水量不均的特点,采用化粪池、混凝沉淀、接触氧化组合工艺处理中小型屠宰厂废水。可使出水水质达到排放标准并实现部分回用。本工程的特点是占地面积少,操作管理方便,处理效果稳定。     

SBR污水处理工艺设计与应用

SBR工艺属于间歇式活性污泥法,用于处理城市生活污水,集缺氧/好氧、水质水量调节、沉淀为一体,流程较短,抗冲击负荷能力强,且操作灵活性大.根据需要,通过调整工序,可改变出水水质,并相应降低运行费用,满足出水水质多变的要求,并具有节省经费、占地面积少、管理方便等优点.对SBR工艺的池数确定、运行周期、运行程序、曝气时间设置等工艺原理进行了归纳说明,并设计举例.     

连续式砂滤器过滤技术试验研究

连续式过滤器是一种新型的一体化水处理设备。该文对影响内循环连续式过滤器工作效率的滤池工作参数进行研究,提出设备运行的关键工作参数,同时试验研究了滤前水处理情况对出水水质的影响,为内循环连续式砂滤器的开发创造了条件。     

高密度沉淀池在废水化学除硬中的研究与应用

该文讲述了高密度沉淀池的结构组成、化学除硬工艺原理、工艺过程控制,总结了生产运行过程和维护要点,其集成混凝、絮凝、化学反应、沉淀、pH调节于一体,可以实现化学除硬、化学降硅、物理沉淀、降低浊度,具有化学除硬效率高、出水水质稳定、药剂消耗量低、土建结构紧凑、占地面积小、自动化程度高,被广泛应用于双膜预处理工段,作为零排放废水处理不可或缺的工艺选择。     

曝气生物滤池法深度处理制革废水试验研究

曝气生物滤池作为一种高效的水处理工艺,具有投资少,占地面积小,模块化建设,可根据排放标准扩建,自动化程度高,管理简单等优势,日益受到重视.本试验中,运用曝气生物滤池工艺对某皮革厂生化池出水进行深度处理,以研究此工艺对制革废水氨氮的去除效果,并探索工艺控制条件.     

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