网络犯罪侦查的IP定位跟踪技术研究

该文将计算机网络技术和数据库理论应用于实际的网络犯罪侦查,提出了用于网络犯罪侦查取证的IP定位跟踪技术,并在此基础上利用C++Builder和WinSock等编程方法开发了一套针对计算机网络犯罪的IP定位跟踪软件系统.该系统可直接应用于网络犯罪的侦查办案,为公安部门破获网络犯罪案件提供有利工具,大大提高了公安人员打击网...     

SSL VPN技术原理分析与案件取证方法研究

本文紧密结合公安网络侦查取证工作的实际需求,从SSL VPN工作的基本原理入手,分析常见的SSL VPN代理访问的基本过程以及使用SSL VPN对计算机各个方面的影响,并结合实际案例,对基于SSL VPN技术的犯罪案件侦查取证方法等方面进行了探索和研究。     

金诺网安介质取证系统DiskForen

金诺网安介质取证系统DiskForen,是一个旨在对存贮介质中的残缺数据进行恢复和 勘察取证的系统。它是国家“十五”重点科技攻关计划项目“打击计算机犯罪侦查技术     

计算机取证模型研究

在计算机犯罪发生后对现场信息进行事后的收集,难以确保证据的真实性和及时性。提出了一个基于动态采集理念的计算机取证模型,介绍了该模型的功能模块,将模糊C均值聚类算法引入到数据分析阶段,采用XML技术表示取证结果,实现了基于该模型的计算机取证原型系统。实验证明,原型系统能采集到准确、有效的电子证据。     

基于风险评估的事件响应过程模型研究

为了提高计算机犯罪取证的准确性和效率,提出了基于风险评估的事件响应过程模型.首先对事件响应过程模型进行分析,指出该模型主要是针对被怀疑的网络系统进行取证的,并且该模型在取证准备阶段具有不完整性且分析过于笼统等不足.为此引入了风险评估方法来对网络系统进行综合的评价,通过利用信息熵来求得各风险因素的熵权,进而判断网络的风险等级,从而可以有效地确定可疑网络并且针对可疑网络进行数字取证.最后阐述了该模型在取证过程中涉及的相关技术.     

计算机动态取证的数据分析技术研究

本文针对计算机动态取证的数据分析阶段面临的问题，提出将数据挖掘技术应用于计算机动态取证的海量数据分析中，给出了基于数据挖掘的计算机动态取证系统模型，提高动态取证中数据分析的速度、分析的准确性和分析的智能性，解决动态取证中的实用性、有效性、可适应性和可扩展性问题。     

云取证模型的构建与分析

计算机取证存在证据获取困难及日志处理量大的问题。为此,将云计算思想引入计算机取证中,提出一种云取证模型。该模型利用Agent技术获取证据,增强证据获取的自主性、智能性,利用云计算中的虚拟化技术和协作技术,提高取证效率及计算机证据的安全性,引入反馈技术,完善取证体制。实验结果验证了该模型的有效性。     

基于手机的取证调查模型研究

给出了手机取证的概念,并与计算机取证进行了比较,分析了手机取证和计算机取证的差异。结合手机取证的特点和难点,提出了基于手机的取证调查模型,分析了模型中各个阶段的具体活动。该模型对取证人员具有一定的指导意义。     

基于协议分析的网络入侵动态取证系统设计

计算机取证技术分为静态取证和动态取证两种。静态取证技术由于采用事后分析的方法提取证据，因而证据的采集不够全面，同时恢复的数据可能是已经被篡改的数据，因而法律效力低。文中将计算机取证技术与入侵检测技术结合，提出一种基于协议分析的网络入侵动态取证系统。该系统采用基于协议分析的入侵检测方法，提高了入侵检测效率及数据分析能力，有助于解决动态取证的实时性；同时系统采取了较全面的安全机制，确保收集的电子证据的真实性、有效性、不可篡改性，是动态计算机取证的一种较好解决方案。     

关于存储原理与数据恢复课程的建设与思考

从当前公安侦查专业计算机犯罪侦查方向学生的培养要求出发,对"存储原理与数据恢复"课程的培养目标、教学内容、教学方法等方面进行探讨,指出该课程建设的主要方向与具体思路,目的是使公安侦查专业计算机犯罪侦查方向的学生能够更好地掌握数据存储的理论知识以及数据恢复的原理与方法,并将其所学运用到计算机犯罪取证中去,为以后从事公安计算机犯罪取证工作打下基础。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.