三水合三氯三甘氨酸镱的晶体结构

为了研究稀土甘氨酸的基本性质,在水溶液中合成了「Ｙｂ（Ｇｌｙ）３（Ｈ２Ｏ）２」Ｃｌ３．Ｈ２Ｏ化合物,缓慢挥发水溶液（ｐＨ＝４～５）得到其单晶。研究了配合物的红外光谱和晶体结构,结果表明,晶体属正交晶系,空间群Ｐ２１２１２１２１。晶胞参数：ａ＝０．４７４９２（９）ｎｍ,ｂ＝１．１９１７（２）ｎｍ,ｃ＝３．０７１６（６）ｎｍ,Ｖ＝１．７３８４（４）ｎｍ＾３,Ｚ＝４,Ｄｃ＝２．１３５ｇ／ｃｍ＾３。晶体是     

钌(Ⅲ)-钼酸盐-乙基罗丹明B-PVA体系缔合显色反应研究

在聚乙烯醇存在下,钌与钼酸盐和乙基罗丹明Ｂ（ＥＲＢ）形成有色离子缔合物。最佳反应条件为「ＨＣｌＯ４」＝１．２ｍｏｌ．Ｌ＾－１,「ＭｏＯ＾２－４」＝６．８＊１０＾－４ｍｏｌ．Ｌ＾－１,「ＥＲＢ」＝３．２＊１０＾－５ｍｏｌ．Ｌ＾－１,ｗ（ＰＶＡ）＝０．０８％。缔合物的最大吸收位于５７５ｎｍ,表观摩尔吸光系数ε＝２．３２＊１０＾６Ｌ．ｍｏｌ＾－１．ｃｍ＾－１,钌量在０－２４μｇ．Ｌ＾－１范围内服从比耳定     

O（^1D）与CF2HC1的反应研究

研究了ＣＦ２ＨＣ１－Ｏ３体系在２５３．７ｎｍ紫外学照射下所引发的Ｏ（＾１Ｄ）与ＣＦ２ＨＣ１的反应。Ｏ（＾１Ｄ）与ＣＦ２ＨＣ１的反应最终产物为ＣＦ２Ｏ、ＨＣ１。对Ｏ（＾３Ｐ）与ＣＦ２ＨＣ１的反应可能性、Ｏ（Ｔ＾１Ｄ）与ＣＦ２ＨＣ１的反应机理、外加气体对反应的影响等方面进行了讨论。     

钨酸盐——碱性染料——聚乙烯醇高灵敏光度法测定痕量锡 …

报告一类光度法测定纳克量锡的新方法,在聚乙烯醇（ＰＶＡ）存在下,锡（Ⅳ）与钨酸盐可分别和碱性染料罗丹明Ｂ（ＲＢ）,丁基罗丹明Ｂ（ＢＲＢ）,耐尔蓝（ＮＢ）反应,形成离子缔合物,缔合物的最大吸收分别位于５８０ｎｍ（ＲＢ）,５６５ｎｍ（ＢＲＢ）和５８０ｎｍ（ＮＢ）,表观摩尔吸光系数ε值分别为３．２３＊１０＾７Ｌ．ｍｏｌ＾－１（ＲＢ）,２．５４＊１０＾７Ｌ．ｍｏｌ＾－１．ｃｍ＾－１（ＢＲＢ）和２．９５＊１     

Ag（I）—QARH络合物在胶束溶液中的光度性质

在ｐＨ５．０的ＨＯＡｃ－ＮａＯＡｃ缓冲溶液中，当有０．１０％ＳＬＳ存在时，Ａｇ（Ｉ）与ＱＡＲＨ形成１：１络合物，λｍａｘ为５３５ｎｍ，ε为１．０５×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ａｇ（Ｉ）含量在０．００５￣１．００μｇ／ｍＬ范围内服从Ｂｅｅｒ定律，稳定常数为１．７８×１０＾１５。所提出的方法用于精铜矿中微量银的测定，结果满意。     

Na24P2W22O83：Eu荧光体的合成及其发光特性

本文用固相反应法合成了参杂Ｓｕ＾２＋的Ｎａ２４Ｐ２Ｗ２２Ｏ８３荧光体，测定其等离子发射谱，Ｘ射线粉末衍射，红外光谱，激光发光谱和发射光谱。。结果表明，Ｎａ２４Ｐ２Ｗ２２Ｏ８３：Ｅｕ属正交晶系，其点阵常数为ａ＝１．４７４５ｎｍ，；ｂ＝１．１９３３ｎｍ，ｃ＝１．１１９ｎｍ，ｚ＝２，属Ｐｘ１ｚ１ｚ２（ＮＯ．１９）空间群，探讨了掺杂Ｅｕ＾３＋离子后荧光体的发光特性。     

碱土金属邻苯二甲酸氢盐的振动光谱

测定了碱土金属邻苯二甲酸氢盐的晶体结构，Ｃａ（Ｃ８Ｈ５Ｏ４）２．２Ｈ２Ｏ为正交晶系，属Ｃ２ｖ＾７－Ｐｍｎ２１（Ｎｏ．３１）空间群，晶胞参数为α＝２．７４８２，ｂ＝０．９４２５，ｃ＝０．６９２６ｎｍ，Ｚ＝４；Ｓｒ（Ｃ８Ｈ５Ｏ４）２．２Ｈ２Ｏ是正交晶系，属Ｃ２ｖ＾１＾２－Ｃｍｃ２１（Ｎｏ．３６）空间群，晶胞参数为α＝２．８４６５，ｂ＝０．８７９，ｃ＝０．６９８０ｎｍ，Ｚ＝４，Ｂａ（Ｃ８Ｈ５Ｏ４）２．Ｈ     

配合物Eu（P—MOBA）3bpy的晶体结构

在乙醇溶液中合成了对甲氧基苯甲酸－２，２′－联吡啶铕配合物的晶体，用ｘ－射线衍射方法测定了配合物的单晶结构，其结构式为Ｅｕ２（Ｐ－ＭＯＢＡ）６（ｂｐｙ）２Ｃ２Ｈ５ＯＨ（Ｐ－ＭＯＢＡ：对甲氧基苯甲酸根离子；ｂｐｙ；２，２′联吡啶），属三斜晶系ＰＴ空间群，晶胞参数；ａ＝１４８２（３）ｎｍ，ｂ＝１．３９０１（２）ｎｍ，ｃ＝１．０９４８（２）ｎｍ；α＝１０３．６３（１）＾０，β＝９２．６７（２）６０，γ＝     

N－间甲氧基苯基亚氨基二乙酸合铜（Ⅱ）二水化合物的晶体与分子结构

Ｎ－间甲氧基苯基亚胺基二乙酸合铜（Ⅱ）二水化合物［Ｃｕ（ＣＨ２ＣＯＯ）２ＮＣ６Ｈ４ＯＣＨ３］·２Ｈ２Ｏ属正交晶系，空间群Ｐｂｃａ，ａ＝１．０７２５（３），ｂ＝１．０８５１（４），ｃ＝２．１８２７（５）ｎｍ，ｖ＝２．５４０（２）ｎｍ３，Ｚ＝８，Ｍｒ＝３３６．８，Ｄｘ＝１．７６ｇｃｍ－３，μ＝１８．１ｍｍ－１，Ｆ（０００）＝１３７６。结构由直接法解出，偏离因子Ｒ＝０．０７８。Ｃｕ（Ⅱ）离子与亚氨基二乙酸分子中一个氮原子、两个水分子氧原子和两个羧基氧原子配位形成一变形四方单锥构型。Ｃｕ（Ⅱ）离子到四方单锥顶点Ｏ（７）原子（水２）的键长为２．２７９×１０－１（４）ｎｍ，长于配位基平面内Ｃｕ－Ｏ和Ｃｕ－Ｎ的平均键长［１．９３９×１０－１（４）和２．０５１×１０－１（４）ｎｍ］。     

应用TEM／EDAX研究粘土矿物的结构和成份特征

利用ＴＥＭ／ＥＤＡＸ技术对粘土矿物作超显微结构观察和微区成分测定，表明蒙脱石，伊利石，高岭石和绿泥石在（００１）方向的晶面间路为１．３ｎｍ，１ｎｍ，０．７ｎｍ和１．４ｎｍ，且有明显的晶格像转化，其主要转化类型有：蒙脱石→伊利石，高岭石→绿泥石，伊利石→绿泥石和伊利石→高岭石。在转化过程中产生的ＣＯ２，Ｈ＾＋和Ｈ２Ｏ会降低孔隙水ｐＨ，促进烃类运移和储层中次生孔隙形成。     

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

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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.     

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 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