基于动态蜜罐技术的虚拟网络设计

通过利用蜜罐技术和网络扫描技术完成动态网络蜜罐的设计，以设计一个动态自适应虚拟网络系统为目标来实现对真实网络环境的虚拟模拟与动态信息收集，从而配置一个与实际网络拓扑结构十分类似的虚拟网络．用以诱骗攻击、转移攻击，对于消解黑客攻击带来的威胁、掌握黑客攻击特性与新型攻击方式很有帮助．     

基于蜜罐的网络动态取证系统研究

针对计算机静态取证技术和常用的动态取证技术中存在的问题,提出了基于虚拟蜜罐的网络动态取证系统模型。该模型将在被保护子网上对流经的网络数据进行实时监控,编写程序对检测到的入侵进行报警,并通过修改iptables的nat表,利用重定向技术将检测到的入侵数据导入到蜜罐中进行记录,实现了入侵检测技术、蜜罐技术与防火墙技术的联动,达到实时动态取证的目的。实验结果表明,该系统不仅可以保护网络和主机不受攻击,还可以长时间的获取证据,并使得证据不受污染,达到了预期效果。     

基于蜜罐技术的网络防御策略研究

蜜罐技术作为一种主动防御的网络安全技术,已经成为诱骗攻击者非常有效实用的方法 .文章分析了蜜罐的原理、结构、特点、设计和实现,提出了一种基于蜜罐系统的网络防御技术,并构建一个虚拟蜜罐系统来全面论证了蜜罐的功能.     

蜜罐的网络入侵检测系统研究

入侵检测系统是对敌对攻击在适当的时间内进行检测并做出响应的一种工具。它通过收集和分析计算机网络和计算机系统中若干关键点的信息,检查网络或系统中是否存在被攻击的迹象。本文首先介绍蜜罐技术的定义,然后介绍蜜罐技术在网络安全中的作用与地位以及蜜罐系统的分类。最后对罐技入侵检测系统做详细的分析。     

一种基于蜜罐技术的入侵诱骗模型的研究与建立

入侵诱骗技术变被动防守为主动防御,其中诱骗环境是真实系统的替身,是整个入侵诱骗系统的核心.本文在入侵检测技术的基础上构建了一个基于蜜罐技术的入侵诱骗系统模型,并且给出了基于有限自动机技术的虚拟服务的设计方法.在这里我们构建了了这样一种诱骗网络,它可以诱惑攻击者,使他们将时间和资源都花费在攻击诱骗陷阱上,从而保护工作系统免于攻击.     

基于Honeypot技术的入侵检测模型的研究

近年来,随着信息时代的到来,网络成为了一把双刃剑,为人们的学习和生活带来了极大便利的同时,也给不法分子的网络入侵提供了途径。这就需要计算机安全防护由被动防御转向主动,因此蜜罐技术作为一种应用诱骗思想的主动防御技术引起了人们很大的关注。将蜜罐技术与IDS结合,使信息安全管理者在新增的电子邮件报警功能中,通过发送处理后的日志记录,准确地了解攻击情况。给出了一个基于蜜罐技术的入侵检测模型。很大程度上提高了入侵检测系统对安全事件的响应能力,体现了蜜罐技术在互联网安全威胁方面的优势和价值。     

基于Honeyd的虚拟蜜罐设计

蜜罐(又称为黑客诱骗技术)是基于主动防御理论而提出来的,在监测入侵、保护客体、信息反馈、提高反击入侵能力的网络安全系统中,日益受到重视.本文展示了虚拟蜜罐的一些基本概念、主要的关键技术.     

利用蜜罐技术架构网络战训练虚拟靶场环境

从蜜罐技术的分类与功能出发,结合网络战虚拟靶场环境建设的目标,探讨了蜜罐技术在虚拟靶场中运用的具体设计与构建.讨论了用蜜罐技术架构网络战虚拟靶场环境的设计要素,给出了相应的模块结构图.在目前流行的蜜罐技术基础上,利用相关工具软件设计了用一个蜜网构成的网络战虚拟靶场环境.     

蜜罐技术在网络安全中的研究与应用

近年来,蜜罐技术逐渐成为网络安全技术中的新宠儿,通过对蜜罐的定义、类型特征的分析,讨论了蜜罐技术在网络安全中的价值及存在的风险性,并介绍了蜜罐布署软件的应用.     

基于Honeyd的产品型蜜罐系统

在研究型蜜罐技术的基础上,分析了产品型蜜罐所应具备的基本特性,设计并实现了一个基于Honeyd的产品型蜜罐系统.系统应用了公钥加密、图形化操作等技术,具有较高的安全性和实用性.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-