催化电解氧化与SBR法联合处理垃圾渗滤液的实验研究

采用催化电解氧化与SBR联合工艺对垃圾渗滤液的处理进行了实验研究．催化电解氧化的最佳操作奈件为：电流密度5A／dm^2；ρcl-5000ms／L；ρSnCl2 50mg／L；极板间距0．5cm；单位体积的垃圾渗滤液所使用的极板面积500cm^2／L；电极材料采用PbO2-IrO2-TiO2／Tj（三元电极SPR）．SBR法处理催化电解氧化出水较理想的操作条件为：溶解氧2-4mg／L；曝气时间5h；沉淀30min；温度20-30℃；pH值6．5-8．0．出水各项指标的去除率分别为COD达到90％以上，NH3-N达到99％，TN达到95％以上，色度达到99％，重金属离子含量低于0．001mg／L．     

二级曝气生物滤池处理城市污水的研究

以球形陶粒为曝气生物滤池的生物载体,进行城市污水处理的半工业试验,考察了滤速、气水比、冲击负荷、反冲洗等因素对曝气生物滤池工作性能的影响。结果表明：在装置规模为12m^3／d,水温为(20-23．5)℃,滤速为(6．09～8．21)m／h,碳化柱和硝化柱气水比分别为1：1和2：1,进水COD为(120-338)mg／L,NH4^ -N为(30．0～53．6)mg／L的条件下,出水达到生活杂用水的标准;冲击负荷和反冲洗对滤池出水水质没有显著的影响。     

汉中市今春两次“倒春寒”天气对农业生产影响的调查分析

一 今春“倒春寒”概况 1、汉中市今年3月12-14日出现了一次明显“倒春寒”天气过程，日平均气温在前期15．6度的情况下猛降到2．6—3．8℃，最大降温幅度达13℃。这三天平川最低气温达到-0．6～0．3℃，山区达到-5～-7℃。伴随这次强降温，各县区还出现了连续两天的中到大雪，积雪厚度大都在2～5厘米。     

测土配方施肥在马铃薯生产中的应用

试验示范结果表明：马铃薯测土配方施肥较常规施肥增产显著，增产率达19．4％-28．3％；薯块商品性改善明显，大中薯薯块重占比例高出11．5％；经济效益好，增加纯收入94．5元／667m^2～162．72元／667m^2，投产此1：2．15～3．69。     

活性紫染料纳滤脱盐精制的研究

对某染料厂提供的活性紫粗制染料液进行了纳滤膜筛选和脱盐浓缩精制的间歇恒容渗滤实验研究膜筛选实验表明：DK膜较之DL膜和NF270膜更适合于活性紫染料脱盐浓缩精制的渗滤过程。间歇恒容渗滤操作参数为：活性紫粗制染料液含染料质量分数5％，含盐质量分数0．8％；染料含盐质量分数为16％，渗滤操作压力1．0MPa，膜面循环通量1．4m^3／h，渗滤浓缩2倍，渗滤时间80h，结果含盐质量分数降至0．75％，染料纯度达到99％以上；最后将料液浓缩3倍，以降低后续喷雾干燥的能耗。该实验研究为工业化提供了依据.     

吸附与超滤法深度处理城市污水试验研究

采用活性炭吸附法和超滤法，对城市污水厂二级出水进行了深度处理试验研究．试验结果表明，粒状活性炭对污水中溶解性有机物有较好的去除效果，当允许出水CODcr为15mg／L以下、炭层厚度为2m、滤速为3m／h、5m／h和7m／h时，吨水用炭量基本在0．2kg／m^3．超滤对水中浊度去除率在95％以上．超滤膜清洗采用洗涤剂配制的清洗液及质量分数为5％的H2SO4.4％的NaOH溶液清洗，膜通量可得到较好的恢复     

有膜法电化学合成丁二酸的研究

研究了有膜法电化学合成丁二酸的电解过程,探讨了硫酸浓度、电流密度、初始马来酸浓度、温度对转化率、电流效率、电能的影响,获得适宜的阴极电解条件为硫酸浓度0．6—0．9kmol／m^3,电流密度0．15A／cm^2,马来酸浓度1．0-1．5kmol／m^3,温度50-55℃。     

空调用金属填料传热传质性能实验

对比表面积分别为350m^2／m^3和500m^2／m^3的3块金属填料在夏季冷却除湿工况下的传热传质性能进行实验研究，用多元线性回归的方法对所得的实验数据进行处理，得到对流传热系数αc，对流传质系数αD、阻力△p与淋水质量流速、空气质量流速、进口水温、进口空气干球温度和湿球温度等影响因素的关系式．实验结果表明，增大淋水质量流速和空气质量流速，会使填料表面空气与水之间的传热传质系数增大；进口水温从5℃增加到12℃，传质系数降低程度超过50％，空气的温降和焓降也分别降低20％以上；比表面积为500m^2／m^3的铝合金填料与比表面积为350m^2／m^3的铝合金填料相比较，更适宜在空调机组中应用．     

胶州湾内外水体部分化学、生物因子的调查分析

在1997-08～1998-06间5次海洋调查的基础上，分析讨论了胶州湾内外水体营养盐和叶绿素的季节变化特征及其影响因子。从调查来看，硝酸盐和磷酸盐的季节变化呈双高峰，分别在8月和12月(硝酸盐：7．0～9．0μmol／L；磷酸盐：0．4～0．5μmol／L)，低值在10月和6月(硝酸盐：1．2～2．2μmol／L；磷酸盐：0．2～0．3μmol／L)。硝酸盐的值湾内明显高于湾外。磷酸盐的值各站的差别较小。相对来说氨氮的季节变化规律不太明显。分析表明营养盐的季节变化受河流径流及水体内各生态过程的共同作用。叶绿素的季节变化呈春夏季高(2．6～5．1mg／m^3)，冬季低(0．2～0．6mg／m^3)的特征。并从浮游植物碳量平面分布进行了分析。     

频振式杀虫灯与沼气灯对水稻害虫控制效果初报

通过安装杀虫灯（频振灯、沼气灯）可降低虫口密度，减轻虫害，减少化防次数，降低化防成本，试验结果表明：沼气灯区节约费用9．5元／667m^2，挽回损失折款36．6／667m^2，增收46．1元／667m^2；频振灯区比沼气灯区节约费用8元／667m^2，增收21．6元／667m^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