浅谈拨号上网的安全问题

随着计算机应用的日益广泛深入和计算机网络的普及,为保证计算机系统和网络通信的正常运行,计算机的安全问题已日益受到广泛的关注和重视.对于时下广大的网络用户来说,通过拨号方式来实现网络接入还是较为普遍的一种途径,黑客的入侵又经常通过拨号网络来实现的,所以如何提高拨号网络的安全已经成为非常重要的问题.     

计算机网络安全与防御措施浅析

随着计算机科学技术的飞速发展,计算机及网络也更为广泛的走进千家万户。随之而来的的网络安全问题有由然而生,无论在广域网或局域网都存在自然和人为因素的威胁,网络的安全问题日益严峻,所以如何认识并提高网络的安全与防御是我们亟待解决的问题。本文针对计算机信息网络安全存在的一些问题进行浅析,并给出一系列防御措施。     

浅谈网络安全技术

随着Internet的日益发展，每个上网用户都可以通过WWW、FTP和Teinet实现网络资源的共享。但由于计算机系统和通信设施本身的脆弱性，构成了对计算机网络系统潜在的威胁，所以安全问题也就自然成了当今网络发展中的热门话题。     

数字图书馆计算机网络安全与防护措施

计算机网络技术的迅猛发展, 推动了图书馆向数字化转变,提高了文献信息的利用效率,扩大了图书馆的服务范围。随着图书馆计算机管理的实现,计算机网络安全问题日益凸显,成为确保数字图书馆正常运行迫切需要解决的问题。一、数字图书馆计算机网络安全的概念和特性数字图书馆计算机网络安全是指通过采取相关技术和管理等     

数字图书馆计算机网络安全与防护措施

计算机网络技术的迅猛发展．推动了图书馆向数字化转变，提高了文献信息的利用效率，扩大了图书馆的服务范围。随着图书馆计算机管理的实现，计算机网络安全问题日益凸显，成为确保数字图书馆正常运行迫切需要解决的问题。     

路由器安全与AAA认证的研究与应用

随着计算机网络的蓬勃发展，路由器在网络中得到广泛运用，路由器的安全问题引起越来越多的企业、组织和个人的关注，结合实际运用，提出路由器安全性及通过AAA鉴权进行身份认证提高安全性的解决方案。     

网络安全的综合应对视野

基于信息发展的今天，网络遍及千家万户，网络的安全成为首当其冲的问题。计算机网络安全的目标就是在通信和安全方面之间建立平衡。对计算机网络安全方面的服务可通过两方面来达到：一是访问控制的服务，二是通信安全的服务。要做到实际意义上的安全便是处理好安全和通信的关系，它要求我们从用户、计算机到网络都要加强网络安全的防范。     

网络安全与防火墙技术

计算机的安全问题是人们讨论的主要话题之一。计算机安全主要研究的是计算机病毒的防治和系统的安全。在计算机网络日益普及的今天，计算机安全的要求更高，涉及面更广。要求防治病毒，要求提高系统抵抗外来非法黑客的入侵，还要求提高对远程数据传输的保密性。通过安装防火墙，可以在内外网之间建立一道牢固的安全屏障。     

基于GPRS的双信道远端接管系统的实现

对传统的网络管理系统安全方面的局限性作了相关介绍,为解决这种日益突显重要的网管安全问题提供了基于GPRS的双信道远端接管系统的具体实现方案.该系统通过GPRS模块和网络实现双信道的对计算机等智能设备的安全远端接管,极大地提高了网管安全性能.对系统的整体构架,GPRS模块的工作原理和具体的双信道连接的实现算法以及该系统在提高网管的安全性方面的特点进行了阐述.     

浅谈计算机网络安全技术

随着计算机网络的发展和Internet的广泛使用,同时也使计算机网络的安全问题日益突出和复杂,计算机网络体系结构是开放式的,给用户提供了资源的共享而且通过分散工作负荷提高了工作效率,因此也是这些问题增加了网络的安全脆弱性和复杂性,在这文章中论述了计算机网络安全技术和防火墙的主要技术特征。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.     

STORIES

正A One day a pig went to the stable(马棚)to see his good friend,an oldhorse,and was going to stay there forthenight.Night came and it was time forsleep.The pig went into the straw heap(稻草堆)and lay comfortably.A longtime passed,but the horse was stillstanding there and did not move.Thepig asked the horse why he did not go tosleep."Standing like this is the begin-ning ofsleeping,"answered the horse.     

巧妙引语(英文)

正1.Any fool can count the seeds in an apple.Only God can count all the apples in one seed.2.Happy families are all alike;every unhappy family is unhappy in its own way.3.Memories are the key not to the past,but to the future.4.Sometimes in the dark you see what you want to see.5.There is a great difference between     

Information for Authors

正Scope and Policy The Journal of Chongqing University-English Edition(JCQU-E)is a peerreviewed journal publishing research articles in multiple disciplines of science and technology,covering civil and environmental engineering,chemical engineering,biotechnology,mechanical and electrical engineering,computer and data processing,mining,metallurgy,materials science,and interdisciplines thereof.