移动互联网动态接入计费机制研究

传统的互联网接入计费系统一般为静态结构,主机在连接互联网过程中接入网关不变,计费系统只需在接入网关采集计费数据。对于移动Ad Hoc网络中的移动结点,在接入互联网过程中接入网关可能发生变化,静态结构计费系统已无法满足需求。基于多网关动态接入计费机制可实现一种动态计费系统,随着接入网关的动态切换,其数据采集功能也在各计费网关间动态转移,计费服务器、计费网关以及移动终端进行协同处理。形式化验证表明,这种机制设计合理逻辑正确,通过报文交互达到计费同步,实现对移动终端进行有效计费。     

计费网关和802.1x相结合的园区网计费系统

网络计费是园区网网络管理的一个重要组成部分，本文详细介绍了目前两种常用的网络计费方式——计费网关和802.1X的实现，比较两种方式的优缺点，提出了一种二者结合的园区网网络计费方式。     

基于透明网关的校园网计费系统实现

针对目前大型宽带网的网络环境,设计并实现了一种基于透明网关的校园网计费系统。该系统物理上由三个服务器(透明网关服务器、web服务器、数据库服务器)构架而成。系统中的六个功能程序模块放置于三个服务器上,协调三个服务器共同完成基于透明网关的计费功能。该系统具有基于用户计费、计费时对用户透明和转发速度快的特点。在宽带大型网络环境中对该系统进行测试 ,结果显示其具有稳定、快速的性能。     

Linux平台下计费网关的设计及实现

研究了国内外电信级计费网关的现状,设计了基于Linux内核的电信级计费网关模型,实现了一种在x86硬件上使用Linux内核进行包过滤的计费系统原型。使用Netfilter框架,完成了网络层的数据包重组,以及应用层的报文头分析;实现了在内核中对HTTP协议的数据流进行解析及过滤,并提取出计费所需的重要信息;使用x86电信服务器对系统原型进行了实例测试,通过性能分析,证明了该系统的可用性。     

一种基于linux软中断机制的计费网关系统

为了找到一种既有较高的系统性能,又有丰富控制功能的合理计费系统,分析了目前校园网的几种计费模式及其优缺点. 针对目前应用最广泛的计费网关模式分析了linux网络协议栈对数据包的处理流程,提出了一种通过软中断机制的数据包获取方法,即通过重新定义处理数据包的软中断tasklet接管原系统对数据包的处理;后续处理加入自己需要的一些对数据包的控制模块,实现了一种兼顾性能和控制的合理的计费网关系统.     

短信互联互通实现方案

参照中国移动的短信网关协议(CMPP)、联通短消息网关协议(SGIP)、中国电信小灵通短消息网关协议(SGMP)以及公众互联网短消息网关协议(SMPP),构建一个短消息互联互通的网关系统．论述该网关系统的通信实现方式以及计费、加密认证、监控的模块。     

基于端口与网关的校园网认证计费设计与实现

针对校园网需求,提出了基于端口和网关结合的校园网认证计费解决方案,以加强对校园网用户管理,提高校园网安全,有效地对学生用户访问校内外资源进行控制与合理计费.最后介绍了基于该方案的校园网认证计费系统实现情况.     

基于网络过滤的IP宽带网关计费系统设计

在分析Linux内核网络参数、内核模块和内核网络过滤框架的基础上 ,提出了一个IP网络宽带计费系统解决方案 ,并突出介绍了其核心部分IP宽带计费网关的设计与实现 .该系统基于用户 ,按IP类别进行流量计费 ,能够为校园网提供一套实时、高性能、可控制的计费系统     

中间件技术在电信计费中的应用

近年来随着我国电信事业的飞速发展，作为电信业务网络的重要组成部分和计算机信息技术在电信领域的重要应用，电信计费系统越来越为电信运营商所重视，电信计费系统从简单到复杂，在技术上也不断完善。在目前，电信计费的数据库日趋庞大，分布式环境和三层体系结构也应用于其中，所以中间件技术就成了电信计费中的主流技术。本文介绍了两层体系结构和三层体系结构的区别，提出了电信计费中应当运用的软件技术，然后透彻的分析评价了中间件技术平台的运用在电信计费系统中所占有的优势和发展趋势。     

校园网络通用计费系统研究与实现

网络计费是网络管理的重要组成都分，在分析校园网计费需求和常用网络计费方式的基础上，提出了一种通用的校园网计费系统解决方案，并且较为详细地描述了实现该系统的主要技术。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-