济阳拗陷高含CO2气藏的同位素特征和成因探讨

济阳坳陷无机成因ＣＯ２气藏多沿断裂呈带状分布,且与新生代玄武岩在空间分布上关系密切．它具有高的ＣＯ２含量（６４．５５％～９９．９６％,平均为８８．１７％）和高的δ１３ＣＣＯ２值（－７．５４‰～－３．３５‰,平均为－５．０３‰）,４０Ａｒ／３６Ａｒ（３１８～３０００,平均为１３５５）和３Ｈｅ／４Ｈｅ（４．６８×１０－６～３．５５×１０－６,平均为４．０１×１０－６）．这些特征表明,气藏中ＣＯ２为深部地幔来源ＣＯ２和地壳来源ＣＯ２按一定比例混合的产物．研究区内前第三系碳酸盐岩石的ＣＯ２含量及其δ１３Ｃ值的降低进一步表明,地壳来源ＣＯ２主要由碳酸盐岩石的脱碳反应形成．     

天然气中分子氮成因及判识

天然气中分子氮（Ｎ２）的成因复杂多样,其同位素组成和其它地球化学特征各不相同。（１）大气源的Ｎ２：ＣＮ２／ＣＡｒ≤８４,且δ１５ＮＮ２≈０‰（ＡＴＭ）;（２）地壳超深部和上地幔来源的原生Ｎ２：δ１５ＮＮ２≈－２‰～＋１‰,伴生Ａｒ的４０Ａｒ／３６Ａｒ＞２０００和Ｈｅ的３Ｈｅ／４Ｈｅ＞１０－６,且Ｎ２和Ｈｅ含量具有正相关性;（３）微生物反硝化作用生成的Ｎ２：δ１５ＮＮ２＜－１０‰和地下水中ＮＯ－３及ＮＯ－２浓度异常高;（４）沉积有机质在未成熟阶段经微生物氨化作用形成的Ｎ２：δ１５ＮＮ２＜－１０‰;伴生ＣＨ４的δ１３ＣＣＨ４＜－５５‰（ＰＤＢ）;（５）沉积有机质在成熟（包括高成熟）阶段经热氨化作用形成的Ｎ２：δ１５ＮＮ２≈－１０‰～－１‰,且伴生ＣＨ４的δ１３ＣＣＨ４≈－５５‰～－３０‰;（６）沉积有机质在过成熟阶段裂解产生的Ｎ２：δ１５ＮＮ２≈＋５‰～＋２０‰;（７）沉积岩中无机氮在高温变质作用下释放出的Ｎ２：δ１５ＮＮ２≈＋１‰～－３．５‰,ＣＮ２／ＣＡｒ８４．对这些潜在源的特征进行了综合论述。     

天然气中分子氮成因及判识

天然气中分子氮（Ｎ２）的成因复杂多样,其同位素组成和其它地球化学特征各不相同,（１）大气源的Ｎ２：ＣＮ２／ＣＡｃ≤８４,且δ＾１５ＮＮ２≈０‰（ＡＴＭ）;（２）地壳超深部和上地幔来源的原生Ｎ２：δ＾１５ＮＮ２≈－２‰～＋１‰,伴在Ａｒ的＾４０Ａｒ／＾３６Ａｒ〉２０００和Ｈｅｒ ＾３Ｈｅ／＾４Ｈｅ〉１０＾－６,且Ｎ２和Ｈｅ含量具有正相关性;（３）微生物反硝化作用生成的Ｎ２：δ＾１５ＮＮ２〈－１０‰,     

山西省柳林奥陶系马家沟组第五段第一亚段的白云石化作用

山西省柳林奥陶系马家沟组第五段第一亚段主要由白云岩组成，顶部为灰岩、沉积于浅的、局限的、低能、基底起伏小、蒸发作用强的克拉通内陆表海环境下．白云石的δ１３Ｃ值为－８．１～０．１‰，平均－３．０‰；δ１８Ｏ值为－１０．９～７．１‰，平均－８．９‰；白云石的碳氧稳定同位素值与泥晶方解石差别不大．准同生白云石的δ１３Ｃ为－４．９～０．１‰，平均－２．１‰；δ１８Ｏ值为－１０．３～－７．１‰，平均－８．７‰．成岩白去石的δ１３Ｃ值为－８．１～－３．３‰，平均－５．４‰；δ１８Ｏ值为－１０．９～－７．７‰，平均－９．２‰．白云石的Ｆｅ２Ｏ３含量为０．５１％～２．９９％，平均１．３６％，白云石较泥晶方解石的铁含量高．白云石的Ｓｒ含量为１３～４７（１０－６），平均２３（１０－６），白云石和泥晶解石的Ｓｒ含量均低．白云石较方解石的晶胞体积减少１２．７％左右．白云石化所引起的体积缩小，产生了大量的晶间孔．有利于淡水的渗透、淋滤，晶间孔进一步改造，形成了晶间溶孔和溶蚀孔、洞、缝．白云石样品的ＭｇＣＯ３含量几乎都大于５０ｍｏｌ％，白云石化，是淡水与富镁海水混合的结果．     

新的六方晶钨氧化合物Na_xWO_3的制备

用热液法制备了ＮａｘＷＯ３,ｘ为０００１８～００３８０,这是一类新的六方晶钨氧化合物．斜方晶钨酸钠酸化水洗,再进行热液脱水;当钠含量≥１６０×１０－６时（质量分数）,得到斜方晶ＷＯ３·１３Ｈ２Ｏ单相,当钠含量≤４０×１０－６时,得到ＷＯ３·Ｈ２Ｏ单相,当钠含量在４０×１０－６～１６０×１０－６之间则为两相混合物．斜方晶ＷＯ３·１３Ｈ２Ｏ在２９０～４２０℃脱水得到六方晶ｈＮａｘＷＯ３;继续升高温度在４２０～４５０℃恒温处理,则得到单斜晶ｍＮａｘＷＯ３．     

高锰酸钾-甲醛-C_2O_4~(2-)化学发光体系的研究

在甲醛存在下,高锰酸钾与Ｃ２Ｏ２－４能够发生化学发光反应,产生很强的化学发光,由此建立了一种测定Ｃ２Ｏ２－４的流动注射化学发光分析法．方法的检出限为４．５×１０－８ｇ／ｍＬ,相对标准偏差为１．３％（１．０×１０－６ｇ／ｍＬＣ２Ｏ２－４,ｎ＝１１）,线性范围为１．０×１０－７～１．０×１０－５ｇ／ｍＬＣ２Ｏ２－４．该法已用于尿样中Ｃ２Ｏ２－４的测定．     

新试剂6-(2-羟基-4-二乙基氨苯偶氮)-2,3-二氢-1.4-酞嗪二酮的电化学发光研究

应用自制的ＥＣＬ－１型电致化学发光仪，对新试剂６－（２－羟基－４－二乙基氨苯偶氮）－２．３－二氢－１，４－酞嗪二酮（ＨＤＥＡ）在Ｎａ２ＣＯ３－ＮａＨＣＯ３缓冲介质中的电化学发光行为作了研究．结果发现，当介质ｐＨ值为 １０．５４时，在一定的实验条件下，施加 １．７Ｖ （ＶＳ．ＳＣＥ）三角波脉冲电压，体系的发光强度与ＨＤＥＡ浓度在５．０ × １０－９～１．０×１０－６ｍｏｌ／Ｌ范围内呈线性关系，反应的检测限达１．０×１０－９ｍｏｌ／Ｌ．     

河南南召水洞岭锌铜矿床的类型及成矿条件

水洞岭锌铜矿床是北秦岭造山带中铜矿远景区的典型黑矿型矿床，形成于二郎坪弧后盆地，时代为早古生代．成矿期间成矿流体以高Ｋ＋／Ｎａ＋、Ｆ－／Ｃｌ－比值和低ＣＯ／ＣＯ２比值为特征；形成温度为１９７～３３０℃，ｆＯ２为３×１０－３１～８．１×１０－３３Ｐａ，形成时的环境压力为７７．９７×１０５Ｐａ，ｐＨ值为５．７３～６．１２（３００℃）．同位素特征显示，成矿物质来源为下伏火山岩，且具有混合硫源（岩浆和海水硫）共同来源，岩浆热液对成矿起了一定的作用     

辽宁二道沟矿床成矿物理化学条件探讨

通过对流体包裹体的研究，证实了二道沟金矿床的成矿流体盐度为０．８～１０．０ｗｔ％ＮａＣｌ；成矿温度和压力分别为２３０～２９０℃和１×１０７～２×１０７Ｐａ；成矿热液为弱酸性到弱碱性，且具有从早到晚向酸性程度降低方向演化的趋势；ｆＯ２＝３．９９９×１０－４０～１．２０２×１０－２９，ｆＳ２＝１．７４４×１０－１１～３．２５×１０－９；矿化发生在近地表的开放性裂隙系统内，为典型的浅成低温热液矿床     

流动注射化学发光分析法测定金银花中的绿原酸

根据绿原酸对鲁米诺Ｈ２Ｏ２Ｃｒ３＋ 化学发光体系具有强烈的抑制作用,建立了绿原酸的化学发光分析法．该法简便、迅速、灵敏度高．化学发光强度的变化值与绿原酸的浓度在２×１０－８ｇ／ｍＬ～４×１０－６ｇ／ｍＬ的范围内呈线性关系,检出限达６．３×１０－９ｇ／ｍＬ．该方法成功用于中药金银花中绿原酸的测定．     

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.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

<正>~~     

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     

WIMAX与WI-FI技术分析及联合组网

介绍了WiMAX与Wi-Fi两种无线宽带接入技术,并对两者之间的关系及相互之间的影响做了对比及分析,并对WiMAX的关键技术进行了详细说明,最后对两者的联合组网方式做了简单的探讨。