龙门山造山带与川西前陆盆地耦合关系及其对油气成藏的控制

以盆地构造-沉积分析为手段,研究了印支期以来川西前陆盆地与龙门山造山带的耦合关系,探讨了川西前陆盆地的构造演化及其对油气藏的控制作用.认为龙门山造山带是经历了印支期、燕山期和喜马拉雅期多期、多类型推覆叠加而形成的复杂地质体,因而造成川西前陆盆地经历了前陆、坳陷、再生前陆的沉积充填过程,该区盆山耦合模式主要为剖面上的前展武逆冲双重构造,平面上表现为NE构造带和近EW向的横断层;造山带和盆地的共同演化不仅形成了多套烃源岩.而且控制了油气保存与有效成藏区带.逆掩推覆带和前陆坳陷带是油气勘探的有利区带.     

东海盆地西湖凹陷平湖构造带致密砂岩储层成岩成藏的耦合关系

以平湖构造带平湖组中下段为例,基于烃源岩及油气的地球化学特征,尝试利用流体包裹体系统分析技术厘定的油气充注史结合储层岩石学恢复的孔隙度演化史,得到研究区致密砂岩储层成岩演化与成藏之间具有"独特"的耦合关系,从而识别出该区存在2种不同成因类型的致密砂岩油气藏。即第1期(16.2~13.8 Ma)油充注于储层致密化之前,在浮力作用下进入储层,形成"后成型"致密油藏;第2期(5~0 Ma)油气充注于储层逐渐致密化时期,在浮力和毛细管压力共同作用下进入储层,形成"边成藏边致密型"油气藏。同时分别对应2种不同的成藏模式,即"早期侧向充注古构造、晚期改造"的复合成藏模式和"原油从源岩垂向充注于圈闭,同时受后来天然气气侵改造"的成藏模式。     

柴达木盆地北缘地区逆冲推覆构造及其油气勘探意义

研究了柴北缘地区逆冲推覆构造的发育背景、发育模式 ,平面、剖面展布特征及其分带性 ,并对主干逆冲断裂带及其间的推覆体带、逆冲席带和低应变区的特征进行了详细描述 ,同时通过野外观察和室内构造反演来研究推覆构造的发展演变模式及其形成机理 ,指出其逆冲叠瓦扇带和隐伏逆冲前缘带是最有利的油气勘探目标 图 6,参 8     

塔里木盆地玉北地区奥陶系储层流体包裹体特征及油气成藏史

通过对玉北地区奥陶系储层流体包裹体进行岩相学观察、显微荧光光谱分析和显微测温分析,研究油气充注特征,划分油气成藏期次并确定其成藏时间.结果表明玉北地区奥陶系存在3幕2期油气成藏:第1期发生在海西晚期283~252 Ma,可分为2个幕次油气充注,其中第1幕(283~272Ma)以低成熟度油气成藏为主,第2幕(268~252 Ma)油气大规模成藏,具混源充注特征;第2期发生在喜马拉雅中-晚期16~3 Ma,主要以高成熟的油气成藏为主,油气成分较均一.在两期油气成藏中,海西晚期油气成藏规模大,为主成藏期.结合区域构造演化历史分析玉北地区奥陶系油气成藏史.     

淮南罗山-李郢孜段推覆体地质特征及成因

逆冲推覆构造一直是构造地质学研究的热点内容之一。以淮南罗山-李郢孜段推覆体为研究对象,在分析其地质背景基础上,调查了其构造地质特征,发现罗山段地质构造主体上为叠瓦状逆冲推覆体构造,李郢孜段为八公山和罗山的块断的转折端。依据野外地层和构造调查,罗山-李郢孜段推覆体为加里东运动以来多期构造运动叠加的结果,其中印支期的挤压与燕山期的拉张是其形成过程中的两个关键阶段。     

哈山地区构造演化特征及对油气成藏的影响

哈拉阿拉特山地区位于准噶尔盆地西北缘前陆褶皱冲断带上,构造演化特征复杂。从构造地质理论出发,应用成盆动力学和盆山耦合的理论对该地区进行了构造解析研究,并利用平衡剖面技术对其进行了构造演化特征及演变史的恢复,同时,针对该区构造演化对油气运聚成藏的控制和影响因素亦进行了深入分析与探讨。在此基础上,获得了以下重要结论与认识：（1）哈拉阿拉特山地区构造演化与准噶尔盆地西北缘密切相关,大致经历了4 个演化阶段：即碰撞挤压期（C—P）、弧后挤压期（P2—T）、伸展断陷期（J1—J12）和再生前陆期（J22—Q）;（2）哈拉阿拉特山及周边地区的沥青及稠油显示,说明该地区发生过油气的运移聚集;（3）哈山地区油气源主要有本地近源与玛湖凹陷远源两种烃源供给系统,油气运聚成藏的关键时期为三叠纪和侏罗纪,油气成藏模式初步预测有3 种,远源侧向砂体—不整合运聚早期成藏模式、近源垂向断层—砂体运聚早期成藏模式和近源混向阶梯状运聚晚期成藏模式;（4）推覆体下盘的背斜等构造圈闭区带是该区寻找油气藏的有利区域。     

东营凹陷民丰北带古近系沙三段成岩演化及其对储层物性的影响

综合利用岩石薄片、埋藏史及流体包裹体等资料,对民丰北带古近系沙三段成岩演化及其对储层物性的影响进行研究。结果表明:沙三段沉积初期至距今38 Ma成岩作用主要为压实作用,距今38～32 Ma发生第一期酸性溶解,距今32～25 Ma发生石英溶解、碳酸盐胶结及第一期油气充注,距今25～2 Ma发生第二期酸性溶解及第二期油气充注,距今约2 Ma发生晚期碳酸盐胶结,距今2 Ma至现今发生第三期酸性溶解及第三期油气充注;对储层物性演化影响较大的主要有压实作用、碳酸盐胶结、酸性溶解及油气充注;第一期油气充注发生在碳酸盐胶结的早中期,抑制了碳酸盐继续胶结,使孔隙得以保存,未发生油气充注或充注弱的储层中碳酸盐胶结强烈,孔隙多大量损失,现今物性较差。     

柴达木盆地西部扎哈泉地区油气成藏过程

扎哈泉地区为柴达木盆地西部典型的致密油勘探区。通过储层定量颗粒荧光、包裹体岩相学、显微测温等分析技术,结合埋藏史和热史,对油气动态演化过程进行分析。扎哈泉地区油藏原油属中等密度常规原油,但储层的QGF-E、TSF荧光光谱特征显示该区原油既有轻质-中质原油,又有重质原油存在。储层中主要发育两类烃包裹体,早期主要为黄色荧光油包裹体,晚期主要发育蓝绿-淡蓝色荧光油包裹体。通过测定伴生盐水包裹体均一温度及埋藏史和热史分析认为,扎哈泉地区主要经历了下油砂山组沉积末期(13 Ma)的原油充注和狮子沟组沉积早期(6 Ma)至今的原油充注以及油藏向上覆地层调整过程。     

下扬子区前陆盆地逆冲推覆构造的研究

下扬子地区广泛发育哟逆冲推覆构造的形成与该区不同深度层次的多套滑动系统是密切相关的。推覆构造的分布在地球物理场上有明显的反映,外来系统与原地系统间节理裂隙的发育有明显差异。逆冲断裂带由浅到深其变形特征为由脆性—脆轫性—轫性变形。推覆构造的成因类型主要有挤压推覆型、重力滑动型和复合迭覆型。该区推覆构造的形成和演化是与中国东部不同时期板块运动密切相关的。逆冲推覆构造改遗了该区中、古生界沉积盆地的形态,因此,对推覆构造的研究是在该区进行中,古生界油气藏评价的关键。     

东营凹陷沙四下亚段-孔店组储层流体包裹体特征及油气充注期次

 东营凹陷深层的沙四下亚段-孔店组是该区油气勘探的接替层系,以沙四下亚段-孔店组储层流体包裹体为研究对象,通过包裹体显微荧光观察和均一化温度测试,结合埋藏史和热史模拟,分析了研究区油气充注特征。研究结果表明,东营凹陷南坡沙四下亚段-孔店组储层经历过1 期油气充注,发生于明化镇组沉积期至现今;而北坡经历过3 期油气充注,分别发生于沙三段沉积期、馆陶组沉积期和明化镇组沉积期至今;南坡沙四下亚段-孔店组油源来自于上覆的沙三下和沙四上亚段烃源岩,北坡比南坡埋深更大,且有沙四下亚段烃源岩的贡献;不同的地质背景、油气来源及生储配置关系,导致东营凹陷南、北坡沙四下亚段-孔店组油气充注期次的显著差异。     

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.     

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.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

英文诗歌中的喻类修辞

为了有助于提高英文爱好者的个人情操、文化素养和学习兴趣,以及专业人员对英语学习和研究进行多途径的探索,本文通过一些精选诗歌的引证和分析,着重论述了喻类修辞法在英文诗歌中的运用其及效果。     

Man Is Unable to Change the Miserable Life——Analysis of the Arrangement of Four Characters in The Glass Menagerie

Tennessee Williams is considered as one of the most important American playwrights since World War II.The Glass Menagerie is his first successful drama,which describes a tragic situation of family and means to say that Man is unable to change the miserable life,no matter whatever means he try,This essay focuses on the analysis of the arrangement of the four main characters:Laura.Amanda,Jim and Tom to reveal the theme.Laura is fragile.Amanda is brave.Jim is vital.Tom is sensible.And all of them develop and try the different means to struggle against life,but fail tragically.With the evidence,the paper comes to conclusion naturally that Man is unable to change the miserable life,and he dooms to fail.     

Characterization of root-nodulating bacteria on Retama raetam in arid Tunisian soils

The aim of this study is to investigate the diversity of Retama raetam root-nodule bacteria isolated from arid regions of Tunisia. Twelve isolates, chosen as representative for different 16S rRNA gene patterns, were characterized by 16S rRNA gene sequencing and phenotypic analysis. Isolates were assigned to Sinorhizobium, Rhizobium and Agrobacterium. Symbiotic properties of Sinorhizobium and Rhizobium isolates showed a large diversity in their capacity to infect their host plant and fix atmospheric nitrogen. Strain RK 22 identified as Rhizobium was the most effective isolate.     

An Affordable Accurate Evaluation of the Binding Conformations Predicted by Molecular Docking Studies in Bio-System

正Recently,docking has been widely used to predict the binding-modes of protein-inhibitors,when the crystal complexes structure was absent.Most docking algorithms are able to generate a large number of probable conformations,it,however,is difficult to effectively evaluate these docking poses and identify the most reasonable bindingmode.In the present study,on the basis of the crystallographic data of human 3-hydroxy-3-methylglutaryl coenzyme