高氯酸铕、六氟磷酸铕二苯亚砜及苯丁基亚砜配合物的荧光光谱

合成了高氯酸铕二苯亚砜Ｅｕ（ＤＰＳＯ）７（ＣｌＯ４）３以及六氟磷酸铕二苯亚砜Ｅｕ（ＤＰＳＯ）７·（ＰＦ６）３及高氯酸铕苯丁基亚砜Ｅｕ（ＰＢＳＯ）７·（ＣｌＯ４）３配合物．从配合物的荧光激发和发射光谱可以看出：Ｅｕ３＋的发光系配体亚砜敏化所致．二苯亚砜配合物的发光强度高于苯丁基亚砜配合物．５Ｄ０→７Ｆ２谱带在二苯亚砜配合物中发生劈裂，且强度高于５Ｄ０→７Ｆ１，这表明Ｅｕ３＋在二苯亚砜配合物中所处格位对称性较低而在苯丁基亚砜配合物中所处格位对称性较高．     

丙烯酸稀土与邻菲罗啉配合物的合成与表征

本文合成了８种由稀土离子（Ｌａ３＋～Ｔｂ３＋）与丙烯酸（Ｃ２Ｈ３ＣＯ２Ｈ）和邻菲罗啉（Ｐｈｅｎ）形成的三元固态配合物。经元素分析确定其组成式为ＲＥ（Ｃ２Ｈ３ＣＯ２）３（Ｐｈｅｎ）。研究了它们的红外吸收光谱、紫外吸收光谱、核磁共振谱及荧光光谱。探讨了中性配体对Ｅｕ（Ⅲ）配合物荧光性能的影响。     

高氯酸铕,六氟磷酸铕二苯亚砜及苯丁基亚砜配合物的荧…

合成了高氯酸铕二苯亚砜Ｅｕ（ＤＰＳＯ）７（ＣｌＯ４）３以及六氟磷酸铕二苯亚砜Ｅｕ（ＤＰＳＯ）７·（ＰＦ６）３及高氯酸铕苯丁基亚砜Ｅｕ（ＰＢＳＯ）７·（ＣｌＯ４）３配合物。从配合物的荧光激发和发射光谱可以看出：Ｅｕ＾３＋的发光系配体亚砜敏化所致。二苯亚砜配合物的发光强度高于苯丁基亚砜配合物。＾５Ｄ０→＾７Ｆ２谱带在二苯亚砜配合物中发生劈裂，且强度高于＾５Ｄｏ→＾７Ｆ１，这表明Ｅｕ＾３＋在二苯亚砜配合     

稀土三元配合物及其发光性质

合成了具有摩擦发光及荧光性能的Ｅｕ３＋与苯甲酰三氟丙酮（ＨＴＡ、三苯基氧化磷（ＴＰＰＯ）的三元配合物．用同样方法合成的Ｓｍ３＋和Ｔｂ３＋的相同组成三元配合物仅有荧光特性．经元素分析及红外、紫外光谱测试,确定它们的化学式为Ｌｎ（ＴＰＰＯ）２（ＢＴＡ）２（ＮＯ３）（其中ｈ分别为Ｓｍ,Ｅｕ,Ｔｂ）．３种配合物在Ａｎｕｒｎ紫外灯光照射下能发出很强的特征荧光,Ｓｍ配合物为粉红色,Ｅｕ配合物为红色,Ｔｂ配合物为绿色．通过荧光光谱研究了它们的发光性质．Ｅｕ３＋三元配合物晶体只经玻璃棒轻轻摩擦便能发出闪烁明亮的红光（摩擦发光）．     

稀土三无配合物及其发光性质

合成了具有摩擦发光及荧光性能的Ｅｕ＾３＋与苯甲酰三氟丙酮（ＢＴＡ）、三苯基氧化磷（ＴＰＰＯ）的三元配合物。用同样方法合成的Ｓｍ＾３＋才Ｔb＾３＋的相同组成三元配 合物仅有荧光特性。．经元素分析及红外、紫外光谱测试,确定它们的化学式为Ｌｎ（ＴＰＰＯ）２（ＢＴＡ）２（ＮＯ３）（ａｄｋｈＬｎ分别为Ｓｍ,Ｅｕ,Ｔｂ）３种配合物在３６５ｎｍ紫外灯光照射下能发出很强的特征荧光,Ｓｍ配合物为粉红色,Ｅｕ配合物为红     

EuA_2（TPPO）_2NO_3配合物的合成、表征和荧光光谱

合成了ＥｕＡ２（ＴＰＰＯ）２ＮＯ３（ＨＡ为对甲氧基苯甲酰－苯甲酸甲烷，ＴＰＰＯ为三本基氧化膦）配合物．用元素分析、红外光谱、热谱、核磁对其进行了表征．７７Ｋ下测定了配合物激光激发荧光光谱．光谱数据说明该配合物具有不止一种Ｅｕ３＋晶格格位，Ｅｕ３＋离子不处于反演中心．     

（Y,Gd）2O3.2B2O3：Bi^3＋,Eu^3＋的发光性质与能量传递

研究了荧光材料（Ｙ．Ｇｄ）２Ｏ３．２Ｂ２Ｏ３：Ｂｉ＾３＋，Ｅｕ＾３＋的合成和晶体结构。经ＸＲＤ确定为六方晶系，晶胞系数：ａ＝３．７８６Ａ，ｃ＝８．８２４Ａ．在２５４ｎｍ紫外光激发下，荧光材料有较强的红色发光。     

稀土与吡啶甜菜碱和2，2′－联吡啶配合物的研究

合成了稀土离子（Ｌａ３＋，Ｎｄ３＋，Ｅｕ３＋，Ｇｄ３＋，Ｔｂ３＋，Ｅｒ３＋）与吡啶乙酸内盐（Ｃ５Ｈ５Ｎ＋ＣＨ２ＣＯ２－，ｐｙｂ）及２，２′－联吡啶（ｂｐｙ）的三元配合物．通过元素分析、红外光谱等测试手段，确定配合物的组成为ＲＥ２（ｂｐｙ）５（ｐｙｂ）４（ＣｌＯ４）６·５Ｈ２Ｏ．测定了Ｅｕ３＋配合物的晶体结构，属三斜晶系．通过ｆ－ｆ超灵敏跃迁光谱及荧光光谱讨论了配合物化学键的离子性特点．     

EuAs（TPPO）2NO3配合物的合成,表征和荧光光谱

合成ＥｕＡ２（ＴＰＰＯ）２ＮＯ３配合物。用元素分析、红外光谱、热谱、核磁对其进行了表征。７７Ｋ下测定配合物激光激发荧光光谱。光谱数据说明该配合物具有不止一种Ｅｕ＾３＋晶格格位，Ｅｕ＾３＋离子不处于反演中心。     

高氯酸镝、高氯酸铕在二苯亚砜体系中的共发光

合成了高氯酸镝铕（Ⅲ）二苯亚砜Ｄｙ１－ｘＥｕｘ（ＤＰＳＯ）η（ＤＰＳＯ）η（ＣｌＯ４）３（ｘ＝１．０００￣０．０００）一系列固体配合物,测定了配合物的组成及荧光激发和发射光谱、发现镝（Ⅲ）和铕（Ⅲ）的姚有猝灭作用,铕（Ⅲ）对镝（Ⅲ）的发光也有猝灭作用,同时研究了Ｄｙ＾３＋、Ｅｕ＾３＋相互猝灭的浓度范围,并根据实验结果了配体Ｓ１能级以及Ｄｙ＾３＋的有关能级     

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