中国北方新近系红土碳酸钙研究及其意义

天水、秦安新近系红土、湖相沉积物的碳酸钙含量均随岩性变化而变化,红色层的CaCO3平均含量维持在6%～7%之间,钙质层的CaCO3平均含量多在20%～40%之间,高值可达60%以上。对比分析表明,黄土的碳酸钙含量高值仅在20%左右,两者相差悬殊。因此,红土与黄土应是不同气候环境下的产物。在此基础上,作者结合周围地区红土的部分沉积学证据对中国北方新近系红土的风成成因提出质疑并明确今后可能的解决途径。     

走进恐龙时代的“病房”——中国古脊椎动物病理学小记

中国中生代的沉积地层分布广泛.随着占亚洲洋的消亡,在中三叠世以后,中国绝大部分区域进入陆内演化阶段,形成了大量的陆相沉积盆地,为脊椎动物化石的沉积提供了良好的条件.近年来,随着研究的深入,科学家在化石标本中发现了一些病变案例,使得中国的中生代古脊椎动物古病理学开始发展.     

兰州地区早更新世五泉砾岩哺乳动物化石证据

本文首次记述了兰州地区五泉砾岩中发现的 Equus sanmeniensis,Coelodonta antiquitatis,Ochotona sp.化石,结合前人古地磁资料,为五泉砾岩形成于早更新世提供了哺乳动物化石证据,同时由这些化石所指示的环境质疑五泉砾岩是否包含有冰水沉积.以往这些论点均缺乏古生物证据。本文从哺乳动物化石论证了五泉砾岩的时代为早更新世.     

济阳坳陷东部新近系馆陶组下段辫状河三角洲沉积研究

根据水下沉积的标志 (泥岩颜色和富存的古生物化石 )和湖泊水流作用的标志 (岩性和结构、沉积构造、粒度分析、岩石的成分与结构成熟度、岩心的沉积相序以及砂体的平面形态等 ) ,证实了济阳坳陷新近系馆陶组下段为辫状河三角洲 ,而不是陆上河流或冲积扇沉积。通过解剖济阳坳陷东部某油田馆陶组的沉积序列发现 ,在馆下段沉积时期 ,辫状河三角洲发育水下辫状河道、河口砂坝以及前缘席状砂等微相 ,这为渤海湾盆地新近纪古湖泊研究和济阳坳陷新近系油气勘探提供了新的思路     

脊椎动物嗜食同类由来已久

嗜食同类在现生动物界中普遍存在，然而在脊椎动物的演化历史上，却很少发现动物嗜食同类行为的化石证据。2003年4月，在我国辽西地区惊现一件楔齿满洲鳄的化石标本，这是迄今为止热河生物群发现的第一件脊椎动物嗜食同类的化石证据，也是脊椎动物演化史上第一个最直接和最令人信服的有关化石脊椎动物嗜食同类的证据，同时也是最早的关于脊椎动物嗜食同类行为的化石记录。     

济阳坳陷东部新近系馆陶组下段辫状河三角洲沉积研究

根据水下沉积的标志(泥岩颜色和富存的古生物化石)和湖泊水流作用的标志(岩性和结构、沉积构造、粒度分析、岩石的成分与结构成熟度、岩心的沉积相序以及砂体的平面形态等),证实了济阳坳陷新近系馆陶组下段为辫状河三角洲,而不是陆上河流或冲积扇沉积。通过解剖济阳坳陷东部某油田馆陶组的沉积序列发现,在馆下段沉积时期,辫状河三角洲发育水下辫状河道：河口砂坝以及前缘席状砂等微相,这为渤海湾盆地新近纪古湖泊研究和济阳坳陷新近系油气勘探提供了新的思路。     

甘肃发现古生物化石宝藏

继发现山西保德、内蒙古通古尔两个古生物化石重点产区之后,科学家在甘肃省和政县发现了又一个中国古生物化石宝藏。中科院、甘肃省博物馆的科研人员最近对和政县文化馆收藏的1055件古脊椎动物化石进行了鉴定。这批化石是文化馆近年来陆续从当地私人手里征集来的。通过鉴定,科研人员对和政化石的珍贵程度感到大为惊讶。据古生物学家推算,已发现的和政古脊椎动物化石数量还不到当时活体动物数的1/10~6。据此估算,形成1055件化石,起码得有10亿头以上的活体动物。     

从“热河”飞出来的鸟儿——“热河生物群”古鸟类研究报道

正我国的东北地区自古以来物产丰富,动植物多样。这里还是我国古生物学领域聚焦的热点,白垩纪早期"热河生物群"的野外发现和科学研究一直吸引着全球古生物专家驻足和研究。近年来,还出土了众多化石,为我们开启中生代的生命之门提供了无数证据。最近20多年来,保存于中国东北地区白垩纪早期"热河生物群"的野外发现和科学研究一直是全球古生物界聚焦的热点,其中系列成果也为中生代脊椎动物的起源和多样演化的深入探讨提供了强有力的化石证据和理论支持,正在成为开启中生代生命演化之门的"秘钥"。     

黄骅坳陷孔南地区孔店组生物组合的环境意义

根据黄骅坳陷孔南地区古近系孔店组118口井的孢粉和藻类鉴定资料、62口井的介形类生物化石的鉴定资料和其它古生物分析资料的综合研究,推测判断孔店组各层序发育时期古气候和古环境的特征及其变化规律.研究表明,孔店期古环境属于陆相淡水-半咸水湖泊相沉积环境,湖泊水体的深度有由浅到深再变浅的变化规律;古气候属于亚热带气候带,4个层序呈干旱、半干旱—潮湿—半干旱—干旱的变化趋势.在上述研究的基础上,综合其岩石学特征,依据孔店期古生物及其遗迹化石在平面上的分布来识别湖泊的位置并画出孔店期生物相图,从而为沉积相和沉积体系的划分提供依据.     

中国古动物馆

中国古动物馆位于西直门外大街北京天文馆西侧，属自然科学类国家级专题博物馆。这座充满着神秘色彩的青色古堡式建筑系统而翔实地介绍了脊椎动物起源和系统进化发育的历史过程。该馆拥有全国各地区、各门类脊椎动物的化石标本20余万件。基本陈列由“古鱼类馆”、“古爬行动物馆”、“哺乳动物馆”及通过声光电等高科技手段模拟出的“恐龙世界”四部分组成，通过实物和其它新颖的展示手段，系统地向观众介绍了史前脊椎动物的起源及其进化历史，展示了我国在各个时期沉积的海陆相地层中保存的古脊椎动物化石及在这一科学领域中的研究成果。馆…     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that