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公安部2008年全国信息网络安全状况暨计算机病毒疫情调查报告日前在天津公布。共有12000余家信息网络使用单位和计算机用户参加了此次调查。调查显示，我国信息网络安全事件发生比例略有下降，信息网络安全事件发生比例和计算机病毒感染率同比分别下降了3％和6％，我国互联网安全状况有所好转。     

计算机病毒的研究与防治

随着科学技术的不断进步,互联网技术和计算机技术得到了迅猛的发展,已经涉及到多个领域,对人们的生活造成了很大的影响.在互联网这个大环境之下,计算机病毒有着多种多样的传播途径和传播媒介,这使得网络安全有着极大的隐患,网络正常运行得不到较好的保障.本文对计算机病毒进行了初步的研究,为计算机病毒防治提出了相关的建议.     

计算机网络安全与防范

Internet在世界范围内的迅速普及,非法入侵、计算机病毒和恶意攻击等不法现象在互联网上也日益猖狂。而影响计算机网络安全的主要因素有：系统的安全漏洞、来自内部网用户的安全威胁、管理制度不健全、缺乏有效的手段监视网络安全评估系统。安全工具更新过慢。防范措施主要有：加强系统设计、强化计算机管理。     

个人电脑网络安全之实用攻略

互联网在带给我们快乐、惊喜和便利的同时,由木马、计算机病毒等引发的网络安全问题又带给了我们痛苦、郁闷和烦恼。网络安全已经逐渐成为一个潜在的巨大问题。本着"防范为主,处理为辅"的整体思想,本人结合自己的经验和对网络安全的了解,来介绍一些有关个人电脑网络安全的实用办法。     

计算机病毒的研究和防治

随着计算机网络技术的不断发展,网络安全和计算机病毒的防治问题越来越受到人们的重视,这篇文章就笔者的经验和对一些文献资料的阐述简单的说明一下计算机病毒的研究和防治,使计算机的使用者明白计算机病毒的感染和传播途径,认识不同的病毒不同的危害性,从而达到能够正确的处理计算机病毒的目的.     

浅谈统计工作中的计算机病毒防治

计算机病毒由来已久,随着计算机广泛应用和互联网的发展,计算机病毒更是给用户带来了极大的困扰。在我市统计工作中也要经常面对各种病毒,查杀和防治计算机病毒是关键,本文介绍了计算机病毒的发展历史,同时结合统计局的具体工作分析了如何防治病毒。     

信息技术在互联网中的应用

互联网是人们进行信息共享的一个最有效的工具。信息推送技术的出现,极大地提高了用户获取信息的效率,从根本上改变了人们获取信息的传统方式,对信息的加工、采集、传递和利用产生了重大影响。本文从互联网网络内涵出发,并对互联网的网络安全进行了分析研究,具有一定的工程参考价值。     

浅析个人计算机网络的安全维护的措施

互联网的发展极大地改变了人们的生活和工作方式,给人们带来了无尽的便捷。但是,在我们惊叹于网络的强大功能的同时,还应当清醒地看到,网络世界并不安全。每年因黑客入侵、计算机病毒的破坏造成的损失令人触目惊心。人们在享受到网络的优越性的同时,对网络安全问题变得越来越重视。作为单位中的一个终端——个人使用的计算机,如何进行简单有效的安全维护,也变得越来越突出了。     

计算机病毒解析与防范

计算机病毒被喻为 2 1世纪计算机犯罪的五大手段之一 ,并排序为第二。计算机病毒的攻击性 ,在于它能够破坏各种程序并蔓延于应用领域。目前世界上上亿用户受着计算机病毒的困扰 ,有些还陷入极度的恐慌之中。事实上人们产生上述不安的原因 ,在与对计算机病毒的误解 ,广大计算机用户有必要对计算机病毒的一些知识有一个比较明确的认识和全面的科学态度     

网络安全及隐私与互联网未来的思考

随着科技的不断创新,科学技术的快速发展,互联网这一电子科技产品已经进入大众的日常生活中,除了在工作和学习中会应用到互联网之外,在平常的生活中人们也无法离开互联网。互联网的出现给人们带来了许多帮助,使人们能够轻松地了解更多的知识以及最新的消息,还能通过互联网完成许多复杂的工作,尽管互联网看起来有各种各样的好处,但是也不可避免地会有一系列问题出现,其中最主要的问题就是网络安全以及用户的隐私问题,因此该文针对网络安全和隐私问题进行了一定的阐述,提出了相应的解决办法,并且对互联网的未来进行思考,希望能够为互联网的发展带来帮助,构建一个安全的网络环境。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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