中国小城镇污泥资源化方案决策方法的探讨

为了找到可以指导中国小城镇污泥资源化方案的决策方法,通过调查研究,论文确定了中国小城镇污泥处置与资源化方向的评判指标体系,综合运用层次分析法、专家评判法、熵值法确定各评判指标的权值,并采用模糊综合评判方法对中国小城镇污泥资源化方案进行决策.研究结果表明:堆肥及农用是小城镇污泥资源化的最佳方案,填埋及土地利用次之,焚烧最差.     

污水处理厂最终处置污泥的方法研究

介绍和分析了我国污泥产生和处置利用的现状 ,提出了六种城市污水处理厂污泥最终处置的方法 ,比较了优缺点 ,并根据我国国情提出了污泥资源化、能源化的处置和利用途径的建议     

浅谈城市污水处理的措施与途径

随着我国城镇化建设的进程以及小城镇建设步伐的日益加快,城市污水的产量近年来明显增加,污水处理和污泥的处置已演变成较为严峻的社会问题.针对目前污水厂污泥传统处理方法如填埋、焚烧、填海及土地利用等存在的不足与弊端,本文探讨了城市污水资源化利用的最终处置方式,为今后城市污水的资源化利用提供参考.     

我国城市污泥特性及其资源化

随着我国城市化进程的加速,城市污水的处理率迅速提高,污水处理过程中的污泥的合理资源化也越来越受到重视.本文概述了目前国内城市污泥处理处置的概况,城市污泥的特性以及当前主要的污泥处理处置工艺的优缺点.并认为污泥建材利用和污泥干化焚烧技术与发电厂相结合的这两种方案是符合我国今后城市污泥处理处置发展方向的.     

城市污水处理厂污泥处置方法分析

本文总结了当前城市污泥处置的各种方法,结合污泥的资源化、减量化、稳定化及无害化,对各种处置方法进行了分析,指出我国城市污泥的有效利用应根据我国国情采取以农业利用为主,其他方面为辅的处置方式。     

污水处理中污泥的处置与利用

介绍和分析了我国污泥产生和处置利用的现状,比较了国内外采用的方法,并根据我国国情提出了污泥资源化、能源化的处置和利用途径的建议。     

天津市城市污泥多元化处置规划设想

在总结国内外城市污泥处理与处置技术发展趋势的基础上,结合天津市的实际情况,根据无害化、减量化和资源化的原则,提出城市污泥处理与处置的多途径发展设想,为制定城市污泥处理规划提供参考依据。     

污泥处理与处置技术的研究

文章介绍了各国通常采用的污泥处置方法,在立足于实际,兼顾环境生态效益、社会效益和经济效益平衡的前提下,找出适合我国污泥无害化处理的技术。并对目前我国污泥处理处置存在的问题及制约我国污泥的资源化利用的因素进行了分析,对污泥处理处置发展趋势提出了展望。     

我国污泥农用资源化的处置方法

目前，污泥的处置方法主要有填埋、焚烧和农用，前二者由于场地有限、费用昂贵等原因在应用上受到限制。污泥中富含N、P、K及有机质，是天然的有机肥料。因此，把污泥的处置与农用资源化相结合将成为最好的选择。我国污泥农用资源化的方法主要有：自然风干后直接施肥、干燥和造粒后施肥、污泥堆肥后施肥和污泥制复合微生物肥，前二种方法由于不能有效去除污泥中的有害物质，而在应用上受到限制，后二种方法通过众多学者田间试验，表明是一种很有前景的污泥资源化处置方法，但重金属离子易在土壤和植物体内积累是限制污泥大规模土地利用的最重要因素。本文结合实例阐述了我国污泥农用资源化处置现状及未来发展趋势。     

污泥好养发酵仓式反应器系统环境影响探讨

随着我国经济发展和城市人口增加,城镇污水处理厂污水处理率和处理深度的提高,污泥产量逐年增加.好氧发酵堆肥作为一种有效处置与利用污水处理厂污泥的手段,该类工程建设日益增多.为了有效解决社会经济发展与环境保护的矛盾,充分发挥环境影响评价的重要作用,实现污水处理厂污泥达到稳定化、减量化、无害化、资源化.本文根据作者从事污泥处理处置建设项目环境影响评价实际工作的一些体会,就污泥好氧发酵工程项目的环境影响因子识别、评价重点.评价难点,环境监管等提出了一些体会.     

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.     

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。     

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.     

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

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