浅析电厂循环水排污水回用的深度处理关键技术

电厂循环水排污水的深度处理是电厂可持续发展的必然需求,其核心技术包括UF+RO双膜法处理回用工艺、石灰软化+离子交换+RO处理工艺和微滤处理工艺,文章着重对这几种技术的特点和工艺过程进行分析。     

合金球墨铸铁热处理及热等静压工艺研究

研究了不同热处理参数对合金球墨铸铁力学性能以及其微观组织的影响;确定了合金球墨铸铁最佳热处理工艺;研究了热等静压对合金球墨铸铁力学性能以及其微观组织的影响;确定了合金球墨铸铁最佳后处理工艺。     

南方某市市政污水处理厂生物处理工艺选择

根据该市区对污水处理的要求,在具体介绍曝气氧化沟处理工艺和改良交替式活性污泥处理工艺各自特点的基础上,进行了详细的技术和经济比较,最后确定曝气氧化沟工艺作为该市污水处理厂的生物处理工艺。     

浅谈制药企业工业废水处理

当前,制药行业更被国家环保部门确定为环境重点治理行业之一。本文对制药企业工业废水处理工艺进行了研究,以此提高制药企业可持续发展。     

气田低温站污水的处理

本文通过对气田低温站污水调查与分析,经试验确定了对该污水进行“混凝沉降.H₂0_2/Fe^z+氧化”的处理工艺及条件,文章还对彩响处理效果的各种因素进行了讨论.试验表明,该工艺对有机污染较重的气田污水具有良好的处理效果.     

煤矿矿井水处理

介绍了马蹄沟矿矿井水的处理工艺、混凝剂的选择、投加量的确定、设备选型和费用分析等问题。介绍了马蹄沟矿矿井水的处理工艺、混凝剂的选择、投加量的确定、设备选型和费用分析等问题。     

饮用水生物综合毒性控制技术研究

研究了以发光细菌检测法做为生物毒性快速检测的方法,测定饮用水处理过程中加入的絮凝剂、预氧化剂、活性炭等对水质综合毒性的影响.研究结果表明采用二氧化氯(0.4 mg/L)预氧化+聚合氯化铝(40 mg/L)混凝沉淀+活性炭(2.0 mg/L)吸附+石英砂过滤组合工艺对原水进行处理有比较好的效果.通过上述组合处理工艺原水,...     

联苯类废水最小化处理工艺运行效果研究

介绍了某农药厂采用"蒸发析盐+树脂吸附"最小化预处理工艺与"铁碳微电解+沉淀+UASB厌氧塔+缺氧池+好氧池+沉淀"协同处置联苯类生产废水的情况,研究了各处理单元对废水的实际处理效果,最终出水达到园区污水厂接管标准。根据该农药厂实际运行情况,分析了该最小化处理工艺在经济、技术上的可行性,为农药行业同类难降解高浓度农药废水处理提供了一定的参考意义。     

某县城生活垃圾填埋场渗滤液处理工艺的选择

生活垃圾填埋场渗滤液水质复杂,处理要求高,做好生活垃圾填埋场渗滤液处理工艺的设计十分重要。通过技术、工程应用、经济及运行方式4个方面的比较,建议某县城生活垃圾填埋场渗滤液处理工艺选择生物处理+膜处理工艺。     

饮用水臭氧生物活性炭净化效果与传统工艺比较

高浓度有机物,高NH4+-N的黄浦江原水经预臭氧→高密度澄清池→砂滤→后臭氧→生物活性炭组合处理工艺后,水质明显优于传统处理工艺.其中臭氧生物活性炭部分对CODMn(高锰酸盐指数)和NH4+-N的去除率分别达到30.4%和18.9%.由于预臭氧相对预氯化能更好地发挥其氧化助凝作用,组合工艺中常规工艺部分对CODMn和NH4+-N的去除率分别达29.6%和81.0%,而传统工艺对CODMn和NH4+-N的去除率仅分别为22.3%和61.5%.考察了2种工艺出水藻毒素,溴酸盐浓度、三卤甲烷生成潜能以及相对分子质量分布等指标,表明组合处理工艺更容易去除小分子有机物(臭氧生物活性炭部分对小于1kD的有机物去除率大于70%),三卤甲烷生成潜能比传统工艺降低41%,且藻毒素和溴酸盐指标均低于我国饮用水标准.由于组合处理工艺能基本去除NH4+-N,可以采用自由氯消毒用以解决传统氯胺消毒带来的亚硝胺等消毒副产物风险和氯胺的气味问题.在高温季节组合工艺澄清池中出现藻类大量生长的现象,可能与臭氧持续消毒时间较短有关,可通过联合预臭氧和预氯化工艺对组合处理工艺中预处理方式进行改造.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

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.     

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-