PAM在滤池反冲洗水回用中混凝效果的试验研究

为探讨刘湾水厂滤池反冲洗水回用的可行性,用聚丙烯酰胺（PAM）作混凝剂,通过电动搅拌器进行混凝沉淀试验,试验结果表明应采用阳离子型PAM作混凝剂,其最佳投加量为1mg／L,静沉5min时上清液的浊度为1．48NTU,明显低于原水浊度。因此,该滤池反冲洗水可直接回用于原水中。     

BAF预处理微污染水源水反冲洗试验研究

文章采用曝气生物滤池(BAF)预处理微污染水源水,对反冲洗参数、最佳反冲洗工况下出水SS和不同挂膜方法下系统反冲洗前后生物量变化进行了试验研究。试验结果表明:气冲洗强度、水漂洗时间、气预冲洗时间分别是反冲洗前后滤池生物活性变化率、反冲洗结束时出水浊度及反冲洗能耗的最大影响因素;BAF预处理微污染水源水最佳反冲洗工艺条件如下:气冲洗强度为7.5L/(s·m2),气预冲洗时间为6min,水冲洗强度为1.5L/(s·m2),气水联合冲洗时间为4.5min,水漂洗时间为4min。在最佳反冲洗工况下,反冲洗出水SS变化基本与反冲洗出水浊度变化相吻合;反冲洗前后,接种挂膜、自然挂膜下系统生物量分别减少27.43%、21.44%。     

给水处理系统优化运行的中试研究

通过中试研究了常规给水处理系统运行工况与费用的基本关系，证实了最经济沉淀水浊度的存在；且证明了该浊度值同混凝剂，沉淀池排泥及滤池反冲洗水等各种费用值的以情况及原水水质条件相关；试验表明虽然该浊度值同原水水质条件相关，但变化幅度不大，有利于在生产上实现优化运行，同时发现在试验的具体条件下，混凝剂费是影响运行费用的主要因素，降低混凝剂消耗是降低运行费用的关键。     

PAC与PAM联用处理低温低浊度原水的生产应用

东北地区冬季,由于原水水温低,浊度低,导致净化工艺中反应速度慢,混凝所形成的絮体轻,不宜下沉。这是水处理工艺中的一项难题。针对低温低浊度原水,该水厂联用聚合氯化铝（PAC）与聚丙烯酰胺（PAM）的投加方式,取得了较好的处理效果,提高了出厂水的水质。     

工业废水集成膜处理工艺试验研究

试验主要为超滤系统运行试验.试验中详细考察了在不同水质情况下超滤膜的相关运行参数、反冲洗、化学清洗周期和时间,进水、循环和产水水质、水量和压力的衰变过程.主要检测指标有超滤系统的进水、产水和反冲洗水的水量,运行压力,出水浊度,SDI值等.     

SSS-L自动过滤器

由浙江省上虞市卧龙给排水设备厂研制的SSS-L自动过滤器,于1993年3月7日通过鉴定。该过滤器以石英砂为滤料,应用水力特性和虹吸原理进行设计制作,是一种对水实现全自动过滤和反冲洗操作的过滤设备。它具有设计合理、性能可靠、结构紧凑、占地少、节能、安装及管理方便等特点,适用于石油、化工、化纤、冶金、轻纺、医药及生活、游乐等部门,对低浊度原水的直接过滤,工业循环冷却水旁滤处理,游泳池水的循环(加药接触)过滤净化(消毒)处理,从而使处理后水的浊度达到国家规定的用水标准。     

双硫腙直接光度法测定人发中的铅

研究了用非离子表面活性剂Ｔｗｅｅｎ２０作为增溶剂，双硫腙水相直接光度法测定人发中铅。在２５ｍＬ中含０～１０μｇ铅符合比尔定律，ε值可达１．３ｘ１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），标准加入回收率为９９％～１０２％．     

原水浊度对水厂生产废水回用影响的研究

根据原水浊度的变化，从改善混凝条件优化净水工艺角度，对九龙江流域水厂生产废水的回用条件和作用规律进行了研究．结果表明，在一定的原水浊度条件下，生产废水回用的最佳含固率范围小于1％．当原水浊度小于60ntu时，最佳含固率随原水浊度的升高而升高，当原水浊度大于60ntu时．最佳含固率随浊度的升高而降低．研究还发现生产废水回用不会造成饮用水水质超标.     

超滤膜处理地表原水膜阻力特性研究

从实际应用角度考虑,把膜阻力分为构造阻力、滤饼层阻力和吸附阻力,并将后两种阻力与水力冲洗强度联系起来,具有实用性.在过滤地表水源且当水中有机物含量变化不大时,吸附膜比阻力与过滤时间呈线形性增加.原水浊度较高时,吸附膜比阻力较小,反之较高.在过滤初期,吸附膜比阻力与原水UV254相关,原水UV254较高时,初始吸附膜比阻力较高,反之较低.滤饼层阻力随过滤时间呈线性下降.浊度较高的原水,滤饼层膜比阻力较小,且下降速率减缓,亦即由滤饼层阻力转化为吸附阻力的部分减少.因此,原水浊度适当提高,可降低总的膜阻力,增加透水通量.     

污泥回流与粉末炭组合工艺强化去除有机物

研究通过试验考察了污泥回流与粉末活性炭吸附组合工艺对浊度、DOC和UV254的强化去除效能。并对比考察该工艺与常规混凝沉淀、单独污泥回流工艺的处理效能．结果表明,混合污泥回流与粉末活性炭吸附联用可以将浊度、DOC和UV254的去除率分别提高至89．2％、52．7％和60．1％,比常规混凝沉淀分别高12．4％、33．3％和24．7％,对DOC和UV254的去除率比污泥回流与粉末活性炭联用分别高9．5％和5．9％．组合工艺对浊度和有机物去除效能的提高可能是由于污泥中氢氧化物沉淀的卷扫和吸附以及粉末活性炭吸附协同作用的结果．组合工艺处理后出水余铝质量浓度比原水略有升高,但比常规混凝沉淀后余铝质量浓度低,原水浊度对组合工艺去除浊度和有机物效果有较大影响,该工艺的适用范围为原水浊度不超过100ntu．     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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