拉萨生活垃圾卫生填埋场渗滤液电絮凝处理研究

垃圾渗滤液是垃圾填埋场渗沥出来的高浓度的有机废水。若不妥善处理,则会对周围环境造成严重污染。文章用电絮凝技术处理拉萨生活垃圾卫生填埋场渗滤液进行了实验研究。研究表明,用电絮凝技术对垃圾填埋场渗滤液能起到很好的处理效果;而且当电絮凝时间、电流密度、PH不同时,对垃圾渗滤液的处理效果也不同。当电解时间为10min,电流密度为12A/dm2,PH=8.1时,渗滤液中COD去除率为77.8%,电解后渗滤液水质能达到污废水二级排放标准。     

拉萨生活垃圾卫生填埋场渗滤液电絮凝处理研究

垃圾渗滤液是垃圾填埋场渗沥出来的高浓度的有机废水。若不妥善处理,则会对周围环境造成严重污染。文章用电絮凝技术处理拉萨生活垃圾卫生填埋场渗滤液进行了实验研究。研究表明,用电絮凝技术对垃圾填埋场渗滤液能起到很好的处理效果;而且当电絮凝时间、电流密度、PH不同时,对垃圾渗滤液的处理效果也不同。当电解时间为10min,电流密度为12A/dm2,PH=8.1时,渗滤液中COD去除率为77.8%,电解后渗滤液水质能达到污废水二级排放标准。     

新型生物反应器对微污染水预处理的试验研究

综合当前生物技术优势，设计开发了一种新型旋转式生物填料反应器，对微污染原水进行了预处理的试验研究。结果表明，当原水D0为4．1—4．7mg／L，CODMn浓度为7—10mg／L，NH3-N浓度为1．2—3．5mg／L时，经过预处理，D0增加列6．20—6．89mg／L；复氧率平均为48．1％；CODMn，NH3-N的去除率分别为36．5％，53．1％,由此表明此种填料的生物反应器对微污染原水有良好的处理效果。     

UV/Fenton试剂法+活性炭组合处理微污染水源水的实验研究

UV／Fenton试剂法 活性炭组合处理微污染水源水的实验研究表明：在UV波长为254nm，过氧化氢浓度为15mg／1，水温为25℃，加入少量的Fe^2 ，照射时间为1h的条件下，单纯UV／Fenton试剂法可使CODMn降解42．3％，UV／Fenton试剂法 活性炭组合可使CODMn降解65．6％。     

电流密度和超精加工对桑塔纳轿车减振器连杆耐蚀性的影响

通过不同电镀工艺参数条件下对减振器连杆进行镀铬处理，用盐雾试验和电解腐蚀试验评价其耐腐蚀性能，研究了电流密度和超精加工对桑塔纳轿车减振器连杆耐蚀性的影响．结果表明，连杆的最佳电镀工艺参数：电流密度为56—58A／dm^2、电镀时间为22min．电流密度为58A／dm^2以下，镀层吸氢量明显低于电流密度为60A／dm^2、63A／dm^2的镀层，吸氢速度平缓，镀铬层内应力小．镀前对桑塔纳轿车减振器连杆进行表面超精加工可显著提高连杆的耐蚀性．     

电解法处理高含氯离子油田污水

应用自己研制的电解反应设施,对川中油气勘探开发公司生产分离后的现场污水进行了电解试验,对电流密度、电解时间等工艺条件进行了分析,并用密封法测定COD（化学需氧量）值。实验结果表明：从降低Cl^-浓度、降低COD值以及吸光度方面综合考虑,电流密度为1~2A,电解时间为30~90min为处理高含氯离子污水的最佳条件。采用混凝絮凝-电解法联用技术处理高含氯离子污水,具有工艺流程简单、污染小、投资少、效果好的优点,可以达到使污水的COD值减小、氯离子浓度降低的效果。     

电凝聚气浮对南湖水净化的试验研究

通过改变便携式供水设备电凝聚气浮部分的电流密度、通电时间、静沉时间、pH值等因数，对武汉南湖水中的浊度、CODMn的去除效果进行试验研究。得出该设备电凝聚气浮部分能对水中浊度有效去除，同时对CODMn具有很强的降解作用，并由此得到电凝聚气浮部分的最佳操作条件。     

纯铝在氯化钠热水溶液中电化学行为的研究

通过电化学分析方法研究了经不同表面处理的纯铝在90 ℃下,3.5%氯化钠溶液中的电化学行为及特点.结果表明,经阳极氧化法处理后的纯铝的耐蚀性远优于未经任何处理的样品;对于经过阳极氧化处理的样品,沸水封孔的试样耐蚀性明显优于未封孔的试样;在相同处理时间,不同电流密度下,随着电流密度的增加,样品点蚀电位不断增加,试样的抗点蚀能力增强;在相同电流密度,不同处理时间下,试样的点蚀电位随时间的增加呈不断下降的趋势,表明点蚀容易发生.最终得到,在阳极氧化电流密度为2 A/dm2,时间为10 min的条件下,试样表面处理工艺最佳.     

KMnO_4改性硅藻土处理微污染景观水的实验研究

将高锰酸钾改性硅藻土用于处理微污染城市景观水,分析了其对CODMn、TN、TP、Chl-a的处理效果,并通过扫描电镜和傅里叶转换红外光谱分析对影响改性和处理效果的原因进行了分析.复合高锰酸钾可显著提高硅藻土的净化能力,以质量分数为0.9%的KMn O4在常态条件下改性后的硅藻土去除污染物效果最佳,对CODMn、TN、TP、Chl-a的去除率分别为38.64%,22.62%,30.4%,60.28%;热活化改性硅藻土的处理效果受活化温度和时间影响较大,在活化温度为400℃、活化时间为2 h时效果最好,对CODMn、TN、TP、Chl-a的去除率分别为35.34%,20.06%,31.87%,54.85%.     

铝酸盐体系中镁合金微弧氧化膜的性能

利用交流微弧氧化装置对铝酸盐体系中的AZ91D镁合金进行了微弧氧化处理，并通过扫描电镜、表面性能测试仪和电化学测试技术等研究了氧化时间和电流密度对微弧氧化膜层表面形貌、厚度、耐蚀性、摩擦磨损性能和结合力的影响．实验结果表明，随着氧化时间和电流密度的增大，在铝酸盐体系中镁合金微弧氧化膜层表面微孔的数量减少，但微孔直径和表面粗糙度增大．微弧氧化膜层的厚度约为4-16μm；膜层与基体的结合力均在20N以上．微弧氧化膜层的耐磨性和耐蚀性随氧化时间和电流密度的增大呈先升高后降低的趋势．镁合金在铝酸盐体系中微弧氧化处理的最佳工艺为氧化时间40min、电流密度0．20A／cm^2.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

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.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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