中国桃花水母属的研究

讨论了桃花水母的发现、地理分布、生物学特征、个体变异、生殖、起源和保护,并记述了桃花水母属的所有种.到目前为至,桃花水母属已记录11种,中国有9种,广泛分布于18省76市、县.     

保护生物学概述

保护生物学是一门年轻的综合性学科 ,其目的是研究生物多样性保护的方法和途径 .在生态系统遭受严重破坏 ,生物多样性急剧下降的今天 ,保护生物学显得尤其重要 .文章分析介绍了保护生物学的兴起与发展、主要理论架构和发展趋势 ,概述了生物多样性保护的各种保护途径 ,展望了保护生物学的发展趋势 ,为我国保护生物学的发展和生物多样性保护提供参考 .     

中国的湿地及保护

本文介绍了湿地的概念及功能,中国湿地资源的状况、分布及特点,中国在湿地保护方面所取得的成绩及今后所面临的问题及工作任务。     

保护生物学研究进展及其与可持续发展的关系

保护生物学是一门年轻的综合性学科，其目的是研究生物多样性保护的方法和途径。在人类面临世界物种与生境大灭绝的背景下的今天，保护生物学显得尤其重要。文章分析介绍了保护生物学的兴起与发展、主要理论架构和发展趋势，概述了保护生物学的两个主要研究内容保护遗传学和种群生存力研究概况以及保护生物学研究的热点问题，并论述了保护生物学与可持续发展之间的关系。     

《大熊猫生物学研究与进展》评介

大熊猫是我国珍贵的一类保护动物,被誉为“国宝”,得到国家自然科学基金会支持,由四川师范学院珍稀动植物研究所所长,荣获国家级有突出贡献专家称号、我国著名的大熊猫研究专家胡锦矗教授承担的,大熊猫生物学研究课题,在进行了数十年艰苦深入的工作之后,现在已出色地完成了研究任务。其成果,由四川科技出版社1990年7月出版了共401页,82万多字的巨著《大熊猫生物学研究与进展》。本书包含六章,每章均以主编亲自调查、观察及实验所得的第一手材料为基础,并综合了近年中外学者所做的工作,从而展示出大熊猫生物学研究的丰硕成果与进展,对促进我国的濒危物种研究及对自然保护事业的发展都有广泛的意义,这六章的主要内容     

第23届国际保护生物学大会将于2009年7月在北京举行

2009年7月11-16日,由中国科学院动物研究所和国际保护生物学会共同主办的"第23届国际保护生物学大会"在中国北京举行。日前,中国科学院动物研究所和中国国家会议     

浅谈中国湿地的保护

本文简要介绍中国湿地的资源状况，湿地保护在经济快速发展的今天所面临的严峻形势和存在问题，提出了只有加大宣传力度，加强对湿地的管理和研究，搞好国际间的合作，坚持走保护与开发的可持续发展之路才是中国湿地保护工作的核心。     

静生生物调查所学术建制研究

静生生物调查所是近代中国最有成就的生物学研究机构之一,也是中国生物学体制化的一个缩影.从其工作内容的演进,组织架构与管理体制,研究人员的来源与结构,经费支持与学术奖助系统及学术交流体系的构建等方面对它的办所理念与学术体制做一探析,以了解科学在近代中国植基和发展的机制以及它的社会功能.     

Bulbophyllum 属药用植物资源生态及其持续利用

论述了中国石豆兰属(Bulbophyllum)14种野生药用植物的生物学特性、种类分布、资源现状、生境特点、药用价值等;并对石豆兰属药用植物资源的保护和持续利用提出了可行的对策,为石豆兰属植物资源的保护和开发利用提供科学依据.     

篦子三尖杉的濒危程度及其保护工作现状

本文综述了我国特有植物篦子三尖杉(Cephalotaxus oliveri Mast)的生物学特性及其濒危机制,并总结了其保护工作现状。     

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-