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1.
为了保障数据库服务器的安全,提出通过设计.NET程序来实现对SQL SERVER数据库服务器的动态监控,及时监控SQL SERVER数据库服务器的变化,从而了解SQL SERVER数据库服务器的安全状态,了解服务器上的数据是否发生变化。分析变化原因,及时采取应对措施,达到保障数据库服务器安全的目的。  相似文献   

2.
基于SQL Server 2008安全数据库服务器的构建   总被引:3,自引:0,他引:3  
研究数据库服务器的安全措施.以SQL Server 2008为例,重点介绍了SQL Server 2008的安全特性,详细阐述了基于SQL Server 2008如何构建安全的数据库服务器,具体包括安全配置管理、验证管理、授权管理、加密和密钥管理、审查管理.  相似文献   

3.
随着web应用技术越来越复杂,SQL注入攻击尤其是SQL盲注已经成为当前最流行的数据库攻击手段之一。文章分析了SQL盲注的原理和攻击过程,重点提出一种双重混合防御模式,即在web服务器层使用输入验证全面减少web站点的注入可能,随后在数据库层部署安全网关实时过滤注入攻击语句。实验表明,该混合防御模块能对web站点的注入漏洞进行有效防护,提升了web应用安全性能。  相似文献   

4.
本文主要阐述Linux+数据库的开发模式,用动态PL/SQL高级数据库程序设计语言,提出了基于动态PL/SQL的数据库开发的两种模式,对动态PL/SQL数据库服务器进行了设计,并给出了客户端与数据库服务器的连接方式。这种基于动态PL/SQL数据库具有良好的安全和跨平台效果。  相似文献   

5.
在改进SQL Server 7.0系列所实现的安全机制的过程中,Microsoft建立了一种既灵活又强大的安全管理机制,它能够对用户访问SQL Server服务器系统和数据库的安全进行全面地管理。按照本文介绍的步骤,你可以为SQL Server2000构造出一个灵活的、可管理的安全之门。而且它的安全性经得起考验。  相似文献   

6.
随着互联网络的日益发展和壮大,越来越多的应用系统采用Windows系列的操作系统作为服务器、SQL Server2000/2005为后台数据库服务器。针对WEB环境下SQL Server各种安全问题进行分析,提出有效的解决方案。  相似文献   

7.
数据库安全性问题一直是围绕着数据库管理员的噩梦,数据库数据的丢失以及数据库被非法用户的侵入使得数据库管理员身心疲惫不堪。大量机密数据存储在SQL Server服务器中,了解和分析数据库的不安全因素和安全防范手段是至关重要的问题。本文介绍了数据库安全方面的问题,并重点讨论了SQL SERVER数据库的安全机制。  相似文献   

8.
数据库安全性问题一直是围绕着数据库管理员的噩梦数据库数据的丢失以及数据库被非法用户的侵入使得数据库管理员身心疲惫不堪.大量机密数据存储在SQL Server服务器中了解和分析数据库的不安全因素和安全防范手段是至关重要的问题.本文介绍了数据库安全方面的问题并重点讨论了SQL SERVER数据库的安全机制.  相似文献   

9.
随着Linux系统广泛应用,数据库的开发至关重要.本文主要阐述"Linux+数据库"的开发模式,用动态PL/SQL高级数据库程序设计语言,提出了基于动态PL/SQL的数据库开发的两种模式,对动态PL/SQL数据库服务器进行了设计,并给出了客户端与数据库服务器的连接方式.这种基于动态PL/SQL数据库具有良好的安全和跨平台效果.  相似文献   

10.
MySQL是一个真正的多用户、多线程SQL数据库服务器,SQL(结构化查询语言)是世界上最流行的和标准化的数据库语言,MySQL是以一个客户机/服务器结构的实现,它由一个服务器守护程序mysqld和很多不同的客户程序和库组成,MY SQL是微软发布的通用型商业数据库,适合企业级应用,而且运行效率比较高,SQL Sserver是微软发布的用于管理SQL数据库的软件,用SQL Sserver可以方便的对SQL的数据库进行操作。  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
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。  相似文献   

14.
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.  相似文献   

15.
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-  相似文献   

16.
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-  相似文献   

17.
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  相似文献   

18.
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  相似文献   

19.
<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  相似文献   

20.
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