异羟肟酸过渡金属配合物的合成和催化氧化性能研究

合成了一系列异羟肟酸Ｌ＾１Ｈ～Ｌ＾６Ｈ及其过渡金属配合物Ｍ（Ｌ＾１）２～Ｍ（Ｌ＾６）２（Ｍ＝Ｃｕ（Ⅱ）,Ｃｏ（Ⅱ）,并以元素分析、ＩＲ、＾１ＨＮＭＲ和ＭＳ进行了表征,考查了它们的铜（Ⅱ）配合物对异丙苯氧化生成氢过氧化异丙苯（ＣＨＰ）的催化性能,与其未取代（Ｒ＝Ｈ）的对照样Ｃｕ（Ｌ＾７）２比较,讨论了配体芳环上取代基及其末端基团对其催化性能的影响。     

超动态法研制交联PEG－20M弹性石英毛细管柱

采用超动态的方法涂渍，以过氧化二异丙苯（ＤＣＵＰ）作为引发剂制备了支联ＰＥＧ－２０Ｍ弹性石英毛细管柱；考查了固定相浓度对柱效的影响，结果证明固定相浓度为１．９％时，涂渍效率在９０％以上，柱效和容量因子也较高．     

非极性SE－52交联毛细管柱的研制

采用静态法以臭氧及过氧化二异丙苯（ＤＣＵＰ）为引发剂制备非极性固定液ＳＥ－５２弹性石英毛细管交联柱，制得的柱子具有柱效高、内壁惰性好、耐溶剂冲洗等特点。柱子适用于烷烃类样品分离。方法简便，适用于一般实验室。     

无机离子对铁－芳烃配合物荧光强度的影响

无机阴离子使环戊二烯异丙苯铁六氟磷酸盐（Ｉｒｇａｃｕｒｅ２６１）的荧光增强，而Ｆｅ（Ⅲ），ＣＤ（Ⅱ），Ｎｉ（Ⅱ）等离子使之荧光强度减弱．讨论了ｐＨ值及温度对荧光强度的影响以及无机离子使环戊二烯异丙苯铁六氟磷酸盐荧光增强的机制。     

杂多阴离子柱撑水滑石类层柱状化合物的合成与表征

以硝酸根型水滑石做交换前驱体，采用离子交换法合成了过渡金属离子三元取代硅钨杂多阴离子柱撑水滑石Ｍ＿２Ａｌ（ＯＨ）＿６－ＳｉＷ＿９Ｚ＿３（Ｈ＿２Ｏ）＿３Ｏ＿（３７）（Ｍ＝Ｍｇ￣（２＋），Ｚｎ￣（２＋），Ｎｉ￣（２＋），Ｚ＝Ｃｕ￣（２＋），Ｃｏ￣（２＋））．用元素分析、ＸＲＤ、ＩＲ、ＵＶ－ＤＲＳ和ＤＴＡ等手段对产物的组成和结构进行了表征。结果表明，杂多阴离子引入水滑石层间后，水滑石的层间距从０．９２ｎｍ增大到１．４７ｎｍ；提高了柱撑材料的热稳定性，随层的组成不同热稳定性顺序为：Ｍｇ＿２Ａｌ≥Ｎｉ＿２Ａ１＞Ｚｎ＿２Ａｌ；随柱的组成不同热稳定性顺序为：ＳｉＷ＿９Ｃｏ＿３＞ＳｉＷ＿９Ｃｕ＿３．处于层中的杂多阴离子在层的脱羟基温度以下均能保持良好的Ｋｅｇｇｉｎ结构。     

新型层柱微孔材料ZnAl—GaW9M3的合成,表征及催化活性研究

采用水热合成与离子交换方法合成了不同过渡金属三取代的Ｋｅｇｇｉｎ结构杂多阴离子ＧａＷ９Ｍ３（Ｍ＝Ｆｅ３＋、Ｃｕ２＋、Ｃｏ２＋、Ｚｎ２＋）柱撑粘土．元素分析、ＸＲＤ和ＩＲ对产物的组成和结构测试表明，杂多阴离子被嵌入粘土层间后仍保持原有的Ｋｅｇｇｉｎ结构，而粘土的层间距却从０．８９ｎｍ增大到１．４６±０．０１ｎｍ．ＥＳＲ结果则表明ＧａＷ９Ｃｕ３进入层间后，由于层板的影响，ＣｕＯ６八面体中的ＣｕＯ键的离子性有所增强．催化实验显示柱撑粘土对合成邻苯二甲酸二辛酯（ＤＯＰ）的酯化反应具有较高的催化活性     

用凝胶色谱分离改进某些Co（Ⅲ）络合物的合成与拆分

在给定条件下用凝胶色谱分离改进ｕ－ｆａｃ－［Ｃｏ（ｉｄａ）＿２］￣－、ｃｉｓ－［Ｃｏ（ＮＯ＿２）＿２（ｅｎ）＿２］￣＋和［Ｃｏ（ｍａｌ）＿２（ｅｎ）］￣－的合成与拆分，中间物和产物的组成与结构用电子光谱、ＣＤ光谱和元素分析表征，结果表明：１）用Ｃｌ￣－型ＱＡＥ－Ｓｅｐｈａｄｅｘ色谱柱可分离除去ｓ－ｆａｃ－［Ｃｏ（ｉｄａ）＿２］￣－，提高ｕ－ｆａｃ－［Ｃｏ（ｉｄａ）＿２］￣－的纯度；２）用Ｎ￣＋型ＳＰ－Ｓｅｐｈａｄｅｘ色谱柱将ｕ－ｆａｃ－Ｋ［Ｃｏ（ｉｄａ）＿２］￣－转化为氢型，使它与△－（－）＿（Ｄ－）［Ｃｏ（ｏｘ）（ｅｎ）＿２］Ａｃ生成的非对映异构难溶盐不会夹带溶解度较小的消旋ｕ－ｆａｃ－Ｋ［Ｃｏ（ｉｄａ）＿２］；３）用不同类型的Ｓｅｐｈａｄｅｘ色谱柱从非对映异构难溶盐或易溶盐中分离出光学活性产物，纯拆分试剂的回收率是７０％～８０％。２）和３）均可提高拆分得率和产物的光学纯度。     

对酞内酰胺苯甲酰氯作为柱前衍生试剂在高效液相色谱中的应用

本文着重综述了对酞内酰胺苯甲酰氯（４－（２－ｐｈｔｈａｌｉｍｉｄｙｌ）ｂｅｎｚｏｙｌｃｈｌｏｒｉｄｅ，以下简称ＰＩＢ－Ｃｌ）作为高效液相色谱的柱前衍生试剂在分析含胺基、羟基化合物和真菌毒素方面的应用。同时还介绍了ＰＩＢ－Ｃｌ的合成及理化性质。     

BaPHT:Ce荧光体的红外光谱分析

合成了掺杂不同摩尔比Ｃｅ（ＩＩ）离子的邻苯二甲酸钡荧光体（ＢａＰＨＴ：Ｃｅ），测定了基质及荧光体的红外光谱，进行了分析和指认，讨论了掺杂离子Ｃｅ（ＩＩＩ）对这些荧光材料红外光谱的影响。     

炸药柱热爆炸临界环境温度的研究

测定了改性１１０５（Ｇ１１０５）和聚奥１５９（ＪＯ１５９）两种塑料粘结炸药柱的３种尺寸（ｄ×ｌ分别为１０ｍｍ×２０ｍｍ，２０ｍｍ×３０ｍｍ，３０ｍｍ×４０ｍｍ）在非限定条件下的热爆炸临界环境温度；计算了在Ｔｈｏｍａｓ边界条件下（０〈Ｂｉ〈∞），３种长径比圆柱的热爆炸临界判据，结果表明，使用由ＤＳＣ分析出的热动力学数据可以很好地计算热稳定性较好的炸药柱的热爆炸临界环境温度。     

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.     

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     

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.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。