网络信息系统安全能力及关键技术探索

网络信息系统的安全性是保证网络信息系统能够稳定可靠运行的首要条件,因此借助于关键的安全防护技术,做好网络安全防护工作,提高网络信息系统的安全能力是至关重要的。本文首先简要分析了计算机网络运行存在的安全问题,并着重就网络信息系统安全能力的构成和网络信息系统安全关键技术进行了探究和分析,旨在为提高网络信息系统安全能力提供有效的理论参考。     

浅析网络存储安全

网络存储是存储系统的发展方向。文章简要阐述了研究网络存储安全的重要性，介绍了当前网络存储安全的现状，分析了网络存储安全存在的隐患，并指出了网络存储安全实现的关键技术。     

可信网络架构安全模型的设计与实现

可信网络架构安全模型是针对用户现有的网络安全资源进行有效整合和管理的。阐述了可信网络架构的概念,介绍了可信网络架构安全模型的设计,探讨了可信网络架构安全模型的实现,重点讨论了体系中新引入的安全机制以及用于安全资源整合的相关机制。     

无线通信系统的安全技术研究

随着无线通信技术的发展,无线通信网络已经成为通信行业的一个新的热点,渐渐成为通信网络的一个重要的组成部分,但它也面临着一些不可避免的安全威胁。本文从分析无线通信网络的安全威胁出发,讨论了无线通信网络的几种安全保密技术,即LTE安全技术,WiMAX网络安全技术,WiMAX与3GPP互通安全技术,使无线通信系统在各方面更安全的应用。     

网络终端安全管理的实现

随着网络技术应用的不断深入,信息安全发展也进入到一个全新的时代。网络终端安全作为网络的最基本安全防护策略之一,在网络安全防护中具有不可替代的作用。如果客户的PC终端始终能升级最新的系统补丁、最新病毒库版本,并养成良好的信息安全意识和习惯,网络的安全问题就解决了90%。本文就网络终端的安全防护进行全面分析,并给出相应的解决办法,有效地保护了整个内网的安全,提高了信息安全防护水平,对解决目前网络安全防护问题具有一定的参考价值。     

新形势下加强网络信息安全的几点思考

面对如何加强网络信息安全防范这一新形势下亟需关注的课题,本文首先分析了网络信息安全面临的巨大挑战,包括敌对势力对信息的渗透日益加剧、部分人员缺乏足够的网络信息安全意识、网络信息安全管理存在薄弱环节等。然后针对这些挑战和问题提出了加强网络信息安全的主要对策,具体为加强网络信息安全教育、完善网络安全技术防护、强化网络信息安全管理、严格落实信息安全法规制度四个方面。     

虚拟网络环境下安全服务接入方法

针对传统安全检测工具难以接入云计算虚拟网络环境为不同租户提供安全检测服务的问题,研究了安全检测服务动态接入虚拟网络的方法.通过安全检测服务多进程化、网络功能虚拟化(NFV)技术构建了安全检测服务资源池,从而使安全检测服务器可以并行提供多个服务进程,之后利用软件定义网络(SDN)技术实现了安全检测服务动态接入虚拟网络的方法,使得安全检测服务可以按需、动态地接入租户网络以提供安全服务.实验结果表明:该方法在不破坏租户原有虚拟网络环境隔离性前提下,可以有效地将传统安全检测工具云化、并行地为多租户提供按需动态的安全服务.     

基于IPSec的Ad Hoc网络安全系统的研究

分析了Ad Hoc无线多跳网络的安全问题和IPSec技术,提出了一种基于IPSec的、分布式的AdHoc网络的安全解决方案,建立了一个3跳无线WLAN(W ireless Local Area Network)Ad Hoc网络,并在网络上部署了作者提出的网络层安全方案,同时对网络的安全性和传输性能进行了相应的测试和评估。测试结果表明,提出的分布式IPSec安全方案在网络层上有效的加强了Ad Hoc网络的安全性能,对Ad Hoc网络本身的性能仅有轻微的影响。     

简论SIP协议及其安全问题

本文分析了会话发起协议及其特点,分析指出了SIP网络面临的一些典型攻击和安全威胁,并针对SIP网络面临的安全风险,简略提出了相对应的安全服务以及在SIP网络中实现这些安全服务所需要的各种安全机制。     

计算机网络安全与防范技术综述

随着计算机网络技术的飞速发展,网络的安全问题也日益突出。本文针对威胁计算机网络安全的主要因素进行了分析,提出计算机网络安全防范若干措施,以确保计算机网络的安全运行。     

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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