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乔庆云 《扬州大学学报(自然科学版)》1998,1(4):75-78
概括描述了先进的水处理工艺V型滤池的池体构造和工艺流程,确定了过滤水力学计算方法,提出了工艺设计方法及有关计算公式,为V型滤池的主体工艺设计提供了较为完整的设计思路及计算方法。 相似文献
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通过建筑小区实例,介绍了联合式生物曝气滤池工艺处理方案。采用该技术处理污水具有出水水质稳定,处理效果好、操作管理运行简单的特点。 相似文献
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曝气生物滤池曝气生物滤池是一种新型的水处理工艺,而填料作为曝气生物滤池最关键影响因素引起广泛关注。文章简单介绍了曝气生物滤池填料的类型及相应特点,分析了填料对曝气生物滤池处理效果的影响,以及几种新型填料的应用情况,鼻提未了填料今后的发展方向。 相似文献
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Haberer工艺由上向流轻质滤料技术、再絮凝过滤技术及其载粉末活性炭过滤技术组成,集接触絮凝、过滤及粉末活性吸附为一体,以扩大过滤的原水范围,提高水处理效果,变革了水处理传统工艺.本文分析了其除浊、去除有机物的机理及特点,并提出了其应用范围. 相似文献
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黄广道 《河南师范大学学报(自然科学版)》2012,40(4):81-83
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. 相似文献
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大梯度磁滤处理饮用水源微污染的试验研究 总被引:1,自引:1,他引:1
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. 相似文献
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哈尔滨工业大学市政环境工程学院绿色化学与技术研究中心 《中国高校科技与产业化》2006,(8):43-43
微波促进化学反应技术,以其加热速度快、温度场分布均匀、对特定化学反应具有诱导催化作用等特点,已被越来越多化学研究工作者所关注,并取得许多成功范例。微波水处理工艺作为一种新型物理化学水处理技术,具有氧化速度快、矿化度高、节省化学药剂、占地面积小、易于实现自动控制等优点,在水处理领域具有广阔的研究开发前景。 相似文献
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张庆东 《长春工程学院学报(自然科学版)》2014,(1):106-108
介绍了生物慢滤池水处理技术的特点、净水原理及设计参数,论证了生物慢滤池用于汽车工厂中水处理中的可行性,比较了汽车工厂传统中水工艺与生物慢滤池中水工艺的优缺点。 相似文献
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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. 相似文献
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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. 相似文献
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Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well. 相似文献
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The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation. 相似文献
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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。 相似文献
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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. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
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- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
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- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
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 相似文献
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《上海师范大学学报(自然科学版)》2014,(5):550
<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 相似文献