河南大别山经济蕨类植物的初步研究

本文报导了河南大别山经济蕨类植物共26科42属77种,并对其生态特点及资源的开发利用进行了初步研究.     

大别山马鬃岭自然保护区蕨类植物区系的研究

马鬃岭自然保护区地处大别山北坡，在安徽省金寨县境内。该区共有蕨类植物２８科、５５属、８９种。本文对该区蕨类植物的科?属、种进行了统计，分析了该蕨类植物区系的地理成分，可将其划分为１３个类型。该区与邻近地区蕨类植物区系关系的密切程度依次为西南、华中、华北、华南、日本、西北、台湾和东北。将该区与我国１２个山地的蕨类植物区系进行了比较，结果表明，该区与天目山、黄山、庐山、北山、九华山、齐云山等六个山地区     

河南蕨类植物新分布

本文报道河南蕨类植物新分布11种,隶属于7科、9属。     

河南蕨类植物区系初步探讨

河南蕨类植物计有28科、69属、195种。通过对科、属、种分布类型的统计分析,论述了河南蕨类植物区系地理成分多样、以温带性质为主,区系的古老性与第三纪古热带残遗性;以西南、华中、华北、华东成分为主,兼有东北、西北与华南成分,热带与温带、湿润与干旱多方交汇过渡的区系性质和特点。     

河南有毒植物调查——蕨类植物和裸子植物

本文报道了河南境内有毒蕨类植物与裸子植物的种类、有毒成分及其分布．调查结果表明：河南境内共有７ 种有毒蕨类植物４ 种有毒裸子植物,它们分别隶属于７ 科９ 属,主要分布在豫南、豫西山区,少数栽培种分布于全省各地．     

南京紫金山国家森林公园蕨类植物资源调查 及区系分析

在野外调查及查阅资料的基础上，对紫金山国家森林公园的蕨类植物资源进行区系分析，结果表明：该区有蕨类植物25科36属79种(包括2变种)，优势科为鳞毛蕨科、金星蕨科、蹄盖蕨科，优势属为鳞毛蕨属、铁角蕨属、肿足蕨属、复叶耳蕨属、耳蕨属，优势种有井栏边草、贯众、渐尖毛蕨、黑足鳞毛蕨、阔鳞鳞毛蕨。世界分布类型有11科12属，热带分布类型有13科18属，温带分布型有1科5属，中国特有分布1属1种。紫金山蕨类植物区系具有明显的热带亲缘性,与安徽的板桥、浙江的龙王山有较大的亲缘关系。在中国蕨类植物区系分区上，紫金山属于东亚区的华东—华中植物地区。紫金山蕨类植物区系是江苏蕨类植物区系的代表区系，具有重要的科研价值。普通凤丫蕨(Coniogramme intermedia)和中华蹄盖蕨(Athyrium sinense)为江苏分布新记录。     

河南伏牛山蕨类植物区系分析

本文报道了河南伏牛山蕨类植物区系４个特征：（１）本区系有蕨类植物２９科７４属２２２种（含变型）;（２）优势科是鳞毛蕨科、蹄盖蕨科和水龙骨科,主要属是鳞毛蕨属、蹄盖蕨属、耳蕨属、瓦韦属;（３）本区系属内种系贫乏,除少数几个属种类较多外,１～２种的属有５２属,占属的总数７０．２７％;（４）种的区系成分在地理分布上与秦岭的联系最为密切,其次是西南、日本     

陕南化龙山蕨类植物区系研究

化龙山共有蕨类植物２６科、４６属、１１４种。本文对该区蕨类植物的科、属、种进行了统计，其区系地理成分可划分为８个类型。本区与我国８个山地蕨类植物区系比较表明，化龙山与神农架关系密切，属同一自然区，与其它山地较为疏远。     

河南薄山国家森林公园蕨类植物区系研究

据调查,河南薄山国家森林公园有维管束植物132科427属772种39变种和6变型,其中蕨类植物13科17属26种和1变种.蕨类植物区系基本特征是地理成分多样,区系联系广泛,有一定的古老性;以温带性质为主,有明显的热带残遗性;特有现象明显,为东亚成分分布中心的一部分;隶属于华北区系,有强烈西南区系特色.     

浙江九龙山自然保护区蕨类植物区系的研究

在野外调查和分类处理的基础上，对九龙山自然保护区蕨类植物区系进行了研究。九龙山保护区蕨类植物区系由35科74属222种(含变种)组成，主要的科是鳞毛蕨科、水龙骨科、蹄盖蕨科、金星蕨科和铁角蕨科，它们包含的种数占总种数的64．41％；主要的属为鳞毛蕨属、铁角蕨属、复叶耳蕨属、卷柏属和瓦韦属。区系地理成分复杂，属的分布类型以热带亚热带性质为主，种的地理成分以东亚分布和中国特有分布最为突出，共占79．73％，表现出热带向暖温带过渡的特点。与邻近6个山地比较，与九龙山蕨类植物区系亲缘关系最近的是浙江凤阳山。九龙山有80种中国特有分布蕨类植物。     

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.     

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.     

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