生物活性炭滤池微型动物泄漏的强化过滤控制

采用孔径10μm的浮游生物网对A水厂活性炭滤池出水的微型动物进行监测,结果表明泄漏的微型动物优势种类为轮虫、线虫、寡毛类和甲壳类.在活性炭层底部增加厚度为40或50cm粒径为0.3～0.5mm的石英砂层,当流速为10～12m.h-1时,对轮虫、甲壳类和寡毛类等体型较大的微型动物能够截留55%以上,但对线虫截留率较低.建议采用10μm的微孔滤网过滤氯接触池出水,可使微型动物穿透进入供水管网的风险降低一个数量级,且工作周期达96h.     

东北高寒地区麦田生态系统中土壤动物区系的研究

本文对东北高寒地区麦田中土壤动物进行了统计，共有１３类，隶属３门，５纲，其中蜱螨类，弹尾类和线虫类占土壤动物总数的９９．１７％，为优势类群，土壤动物具有明显的季节变化，这与诸多环境因素的综合作用有关，即环境因素的变化可以使土壤动物的类群结构发生改变，麦田中０￣１５ｃｍ土壤动物的垂分布无显著差异。     

星虫动物门系统发生研究进展

根据已经发表的研究资料,总结星虫的一般生物学特点,回顾星虫动物门形成的过程及星虫动物门系统进化研究的历史和现状。星虫以其独有的特点被提升到门的位置,已经广泛为人们所接受,但是对于星虫的分类和系统进化上的亲缘关系一直没有形成一致的意见。在星虫的分类学上,大多数学者认同Cutler和Gibbs的分类系统,即将星虫分成2个纲、4个目、6个科和17个属,但是星虫在系统进化上的亲缘关系的研究结果不一致。原因可能在于分析方法上的不同,建议进行各种数据的联合分析,并以较为合理的方式解决分析中的和谐性问题,统一地确定出星虫的亲缘关系。     

许昌郊区不同生境下大型土壤动物资源调查

调查了7种生境的土壤动物数量和群落组成,共获得土壤动物538只,隶属于3门7纲11目.分析表明：优势类群为蚁科和线虫,常见及较常见类群为鳞翅目、蚯蚓、鞘翅目、马陆、鳞翅目（蛹）、蛴螬、蜘蛛目、鼠妇,其余5类为稀有类群.土壤动物的个体数及类群数以城市道路绿地最多,废弃荒地最少,说明人为干扰较小的生境土壤动物的数量和类群数较多.多样性以河边人工灌丛沙地最高,菜地最低,这与河边人工灌丛沙地营养丰富,菜地施用化肥、农药有关.菜地与废弃荒地的相似性极高,说明其群落组成相同.     

农药污染对土壤动物群落的影响研究

采用喷洒除草剂和杀虫剂对土壤动物进行野外盆栽污染模拟实验。实验共获得土壤动物1695只,隶属5门,9纲,17目;结果表明,随着农药浓度的增加,土壤动物类群数、个体数以及群落多样性指数等随着降低,且均比对照组低;土壤动物种类的减少主要是由于常见类群和稀有类群的减少,而土壤动物的数量变化则主要是由于优势类群线虫类、线蚓科、弹尾目和螨类的数量消长所致。     

青岛海滨动物名录

本文记载了青岛海滨动物11门24纲45目105科157种。     

清净水质的能手—轮虫

英国生物学家约翰·沃尔什经过多年研究发现,一种称为"轮虫"的极微小的水生后生动物,具有极强的清净水质的本领。在当前水质污染已被列为世界环保议题的情况下,这种后生动物的净水特异功能,已经引起世界环保专家的广泛关注。轮虫,属于担轮动物门轮虫纲,全世界均     

轮虫与养鱼

轮虫(Rotifera)是线形动物门轮虫纲的一类动物,个体很小,体长一般在100～50O微米之间,少数种类可达2毫米。几乎所有水域中都有轮虫的分布,但相比之下,淡水中多,海洋中少。目前,随着水产养殖事业的发展,轮虫作为鱼虾等水产动物的开口饵料日益受到人们的重视。研究轮虫、开发轮虫资源已成为水产养殖业的重要课题。     

准噶尔盆地东部部分地区土壤动物多样性初步研究

文章采用手检法和Tullgren干漏斗法对准噶尔盆地东部部分地区5种不同生境即果园、白杨林、槭树林、榆树林及麦田土壤动物进行取样调查,并对其多样性进行初步分析。结果表明,共获土壤动物1958只,经初步分类鉴定隶属于5门、12纲、22目,同时对其多样性指数(H)、均匀性指数(E)及优势度指数(C)进行分析并讨论不同生境土壤动物各类群之间的相互关系和差异。     

太原地区土壤动物资源调查初报

对太原地区土壤动物进行了调查，在获得的21类2973只土壤动物中，隶属于3门、7纲．其中弹尾目和蜱螨目为优势类群．占总捕量的74．10％．并根据经济用途，将它们分为：食用土壤动物、药用土壤动物、饲料用土壤动物、天敌用土壤动物和环境指示土壤动物五大类资源土壤动物。     

On the Phylum Vetulicolia

1 The Chengjiang Fauna and the four greatest inno- vations in the evolutionary history of animals In 1837, i.e. 22 years before the formal publication of Origin of Species, by comprehending the finch story in the Galapagos, Charles Darwin understood that an animal species could be transformed into another species bygradual modifications and for the first time drew the fa- mous “branching tree”[1]. A century later, passing through two major revisions, i.e. the so-called Neo-Darwinism and …     

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.