利用LogMiner分析Oracle日志文件

LogMiner是Oracle 8i以后版本提供的日志文件分析工具,利用它可以提取Oracle数据库日志的内容,获取重做和回滚SQL语句,执行数据更改的事后审计。以”医院信息系统”相关业务为例。简要介绍如何利用强大的LogMiner工具分析Oracle数据库日志,实现对数据库操作的审查和回退。     

Oracle数据库数据文件损坏时修复方法的实验研究

Oracle数据库的数据文件是用于保存数据库中数据的文件,一旦数据文件意外丢失或损坏,则必须应用备份的数据文件替换损坏的数据文件,再结合归档日志和联机重做日志文件,恢复到数据库故障时刻的状态。依据损坏的数据文件的具体情况,用模拟故障的方法研究了不同情况下数据文件的恢复方法。     

ORACLE8I数据库介质故障恢复范例

oracle8i数据库管理系统提供了在介质故障发生时,充分利用备份而进行数据库恢复的功能,本文介绍了因介质故障引起数据文件丢失,镜像联机重做日志文件丢失,控制文件丢失的恢复流程图以及作者处理过的典型实例。     

一种基于引用日志文件的启发式会话识别算法

为了将服务器日志分割为多个独一无二的用户的一次访问序列,提出了一种基于引用日志文件的启发式会话识别算法,并给予很好的算法实现.     

基于XML的Web日志预处理

提出使用XML文件的方法存储不同Web日志的格式,采用一个通用的方法分析原始的Web日志,并对日志做预处理、产生Web日志挖掘系统所需的数据,从而使Web日志挖掘更快速和准确。     

基于面向对象系统日志管理模块的设计与实现

大型软件系统都有详细的日志文件记录系统运行情况,描述了一种基于面向对象的并且采用多线程设计的日志管理模块的设计与实现,日志管理模块将软件系统中记录日志的操作提取出来形成了独立的模块,降低了系统的耦合度,提高了复用性。     

基于Windows日志的安全审计技术研究

事件日志记录着操作系统或应用程序中重要的事件。通过对日志进行分析,发现所需事件信息和规律是安全审计的根本目的。文章讨论了对Windows系统日志文件进行集中式统一管理,采用API钩子技术实现Windows下的审计数据的获取,并通过对Windows日志的分析给出了一种基于主机日志分析的安全审计通用模型。     

蜜罐系统中日志服务器的安全性研究及实现

蜜罐技术是一种主动防御的网络安全技术．针对蜜罐系统中日志服务器的功能和特点,提出了采用伪装数据包进行日志传输的思想,能更好地隐藏日志服务器,提高其安全性．在详细描述了日志文件伪装传输的实现过程的同时,对伪装结果进行了测试．测试表明,所提方法达到了预期的效果．     

基于Linux的日志分析

日志是进行系统和网络诊断的重要依据,尽管日志文件中包含着大量有用的信息,但这些信息只有在经过深入挖掘之后才能够最大限度地发挥作用。本文首先讨论了能够从日志的用途入手,介绍了日志的一些类型。然后又从具体的HTTP和FTP服务中产生的日志进行分析,详细讨论了日志文件的使用。     

基于动态污点跟踪的敏感文件泄露检测方法

为了解决网络应用程序引起的服务器敏感信息泄露问题,提出了基于动态污点跟踪的敏感文件泄露检测方法.该方法先标记敏感文件的读写缓冲区为污点源,然后实时跟踪文件缓冲区的处理流程,监测污染源是否传播到其他内存位置,或者写入其他文件.最后检测发送缓冲区是否包含污点数据,以确定是否发生敏感文件的泄露.实验结果表明:提出的方法不仅能够监控用户指定的敏感文件,还能防止应用程序将敏感信息写入其他文件或者发送到网络上.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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