高速公路计费的几点思考

从高速公路计费方式的沿革，分析各种计费方式的优点和缺陷，探讨高速公路计费的实质和科学计费的依据，提出在目前情况下最适用的计费办法是二元结构计费办法。     

校园网计费系统原理及实现

讨论了校园网网络计费系统的原理,比较了基于Telnet的计费方式和基于SNMP的计费方式不同,论述了SNMP协议在网络计费系统中的实现,在此基础上设计了一个具体的计费系统模型,该计费系统具有数据采集,数据处理,计费信息查询,半数规则设置和报表生成等功能。     

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。     

无线电话自动计费系统的开发及应用

本文就利用软件工程开发无线电话自动计费系统的总体结构作了阐述，并介绍了该系统的基本功能，设计及技术特点。     

一种新的移动通信计费方案研究

针对当前移动通信计费体制仅考虑通信时长不考虑通信质量的情况，提出了基于通信质量的弹性计费方案。首先讨论了现行移动通信计费体制的优缺点，然后对弹性费率方案进行了分析研究并提出相关算法。对于移动用户而言，该算法简洁易懂；对于运营商来说，算法具有编程简单、易于调试和修改等优点。最后，分析了移动通信对话音重建质量要求，指出了有待解决的问题。     

程控总机自动计费系统的设计与实现

介绍程控总机自动计费系统的软硬件设计，其中包括程控总机与电脑的硬件接口、通信协议和自动计费系统软件的设计方法。     

通信计费数据采集与传输安全性的研究

网络与通信的迅速发展,要求计费数据采集与传输要适应计费的发展。越来越多的网络,越来越多的交换机种类,越来越多的业务类型,越来越多的服务要求,越来越多的用户终端,要求计费数据采集与传输能够融合多个网络,支持多种类的交换机,支持尽可能多的业务类型,满足尽可能多的服务要求,兼容尽可能多的操作系统以用来满足不同终端的用户。针对以上要求,对计费数据采集与传输模型及计费数据的采集方式、交换机对数据采集提供的支持进行了研究和探讨。     

通信计费数据采集与传输安全性的研究

网络与通信的迅速发展,要求计费数据采集与传输要适应计费的发展。越来越多的网络,越来越多的交换机种类,越来越多的业务类型,越来越多的服务要求,越来越多的用户终端,要求计费数据采集与传输能够融合多个网络,支持多种类的交换机,支持尽可能多的业务类型,满足尽可能多的服务要求,兼容尽可能多的操作系统以用来满足不同终端的用户。针对以上要求,对计费数据采集与传输模型及计费数据的采集方式、交换机对数据采集提供的支持进行了研究和探讨。     

移动电话网联机计费管理系统设计

从我国移动通信网现状出发，对联机实时计费管理系统所要实现的目标、总体结构、接口技术、系统平台、系统功能以及系统性能等进行了讨论和设计。     

高校校园网络计费策略研究

首先,根据校园网计费认证的实际情况,提出了校园网计费认证系统的架构;其次,按照用户入网的类型和区域将用户划分为若干个子计费用户组,并确定子用户组的计费模式;最后,通过对各子用户组实际上网行为的数据进行统计分析,确定了各个计费模式组中的特征最大值,为下一步计费费率量化奠定了基础。     

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.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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