关于中国电信股份有限公司汕头潮南区分公司客户保留策略的研究

本文基于潮南电信所处的通信市场经营环境和竞争格局,以事实、数据为基础,就中国电信股份有限公司汕头潮南区分公司用户离网的现状、原因进行了分析。同时,面对企业日趋严峻的用户离网形势,结合SWOT分析、4P理论等方法,就潮南电信离网问题对策进行了理论分析,提出了潮南电信用户离网问题对策研究的总体思路,初步建立起一个用户挽留机制。通过本文的分析和研究,希望能够解决潮南电信目前用户离网率居高不下的问题,提升客户关系管理能力。     

电信管理网（TMN）研究

本文主要研究了电信管理网(TMN),首先分析了电信管理网提出的必要性,并介绍了电信管理网的研究目的和特点;其次研究了电信管理网的三个核心问题:管理业务,管理功能和逻辑分层;再次对电信管理网功能体系的五个功能块进行了探讨,并分析了电信管理网实现的技术基础;最后展望了电信管理网的发展趋势。     

基于管理信息系统的电信管理网的分析与模型

运用管理信息系统的原理、方法对我国建立电信管理网进行了可行性分析。讨论了建立电信管理网的必要性和可能性，从管理信息系统角度提出了电信管理网的物理模型和逻辑模型。     

电信管理网开发和建设方法的探讨

随着通信网规模的逐渐增大,网元类型的日趋增多,人们对网管系统管理能力的需求越来越高。电信管理网（ＴＭＮ）的思想既可满足目前需求,又适应未来发展,是未来网络管理的发展趋势。本文就ＴＭＮ的开发和建设方法的基本思想进行了探讨,并对它的未来发展方向进行了展望。     

“新政”下探索三网融合的发展形势和总体实现

在国务院最新政策的指导下,本文通过分析国内外＂三网融合＂发展现状和未来发展趋势,站在国家宏观的立场,对新政策、新形势下的业务运行模式进行了探讨,提出了推进三网融合总体的思路和对策。     

基于GIS的延吉市电信商业网点布局研究

基于GIS空间分析对延吉市中国电信商业网点的服务范围及其与人口、经济之间的相关性进行了研究,并结合最低门槛值理论、中心地理论,进行了缓冲区分析,得出电信商业网点分布的集中化分布指数,同时构建基于权重设置的电信商业网点选址的耦合度模型,进行了人口分布与电信商业网点分布的相关性分析.分析结果显示,延吉市电信商业网点主要以"中关村"为中心向四周辐射,在延吉市中心商业区四周集聚性明显,但总体分布不均匀,尤其是延吉市西部和北部经济拓展区,还存在服务盲区,服务覆盖范围有待扩充.通过分析研究,旨在为延吉市电信商业网点未来布局更加合理地发展提供借鉴和理论指导,也为新一轮的延龙图一体化开发提供借鉴.     

初探联通光缆利用

根据国家对电信行业重组的要求,中国电信以1100亿的价格购买了中国联通的CDMA网络。对联通C网资源的划分是目前工作的重点,而光缆网络资源是其一个重要的组成部分。由于联通光缆网络由C/G两网共用,按照电信、联通集团协商的划分指导意见,光缆按纤芯划分,即一条光缆中纤芯由电信、联通各占一部分,目前这部分工作正在进行当中。下面通过对联通、电信光缆网络现状分析,以及两个网络差异性的比较,来探讨电信分得联通光缆网络纤芯资源在新C网中利用的利与弊。     

浅谈分组技术及在未来网络的应用

1.分组技术的基本原理；2.分组技术的组网方式；3.分组传送网的体系结构；4.各大电信运营商对分组传送技术的认知；5.分组传送网技术在未来传送网中的应用。     

电信级以太网发展及主要技术简介

随着电信三重播放、大颗粒专线业务的发展，对电信传送网提出了综合承载的需求。电信级以太网技术由于其简单易用利于扩展，并且具备电信级特征，各大运营商都已大规模部署。本文对电信级以太网技术的研究意义及主要演进技术进行了分析介绍。     

我国未来电信监管模式的新探索

电信产业的快速发展和电信技术的不断创新给电信监管带来了巨大的挑战。为此,本文从分析电信业发展的趋势和由此对电信监管带来的挑战入手,在对国外电信监管模式和技术手段进行充分实证分析的基础上,从政策法律、市场准入、互连互通、资费管制、普遍服务、电信标准等六个方面探讨了我国未来电信监管模式的发展方向和发展趋势。     

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。