基于远程控制技术的动态取证系统

设计了一种新的基于远程控制技术的计算机取证系统,提供了3种不同取证方法动态获取控制目标的电子证据,研究了文件隐藏、进程隐藏、注册表修改隐藏、端口反弹、数据加密等关键技术。实验表明,该系统能动态获取网上不同监控对象的电子证据,是当前取证技术的一种新思路。     

基于线性调频信号的多频测距算法

设计了一种新的基于远程控制技术的计算机取证系统,提供了3种不同取证方法动态获取控制目标的电子证据,研究了文件隐藏、进程隐藏、注册表修改隐藏、端口反弹、数据加密等关键技术.实验表明,该系统能动态获取网上不同监控对象的电子证据,是当前取证技术的一种新思路.     

基于NTFS的计算机反取证研究与实现

为对抗各种取证软件的分析与调查,针对NTFS文件系统提出一种数据隐藏方法。该方法支持用户从系统中选择合适大小的正常文件作为载体,运用对称加密算法和异或运算对待隐藏数据进行预处理,在确保原载体文件正常的前提下,将处理后的结果嵌入到正常文件中。该方法可以解决隐藏文件时,需要人工不断搜索空闲空间以容纳待隐藏文件的难题,其处理速度快且具有较强的计算机取证对抗 能力。     

Windows 8下基于镜像文件的内存取证研究

内存取证是计算机取证的一个重要分支,而获取内存镜像文件中进程和线程信息是内存取证技术的重点和难点。基于微软最新操作系统平台Windows 8,研究其进程和线程的获取方法。运用逆向工程分析技术对Windows 8下进程和线程相关内核数据结构进行分析,提取出相应特征;基于这些特征,提出了一种能够从物理内存镜像文件中得到系统当前进程和线程信息的算法。实验结果和分析表明,该算法能够成功提取隐藏进程和非隐藏进程,及其各进程相关的线程信息,为内存取证分析提供了可靠的数据基础。     

计算机取证技术综述

本文对计算机取证中的数据获取和数据分析展开讨论,针对不同现场环境给出了不同的数据获取的方法,并归纳了对证据文件进行数据分析的基本步骤和技术手段。     

Microsoft复合文档结构电子数据取证分析

针对特定类型文件结构进行分析,进而发现隐藏其中的证据与线索是电子数据取证采用的重要方法之一。作为Windows操作系统中最重要的文件类型,Microsoft复合文档拥有独特而复杂的文件格式。文章在详细描述Microsoft复合文档头文件及目录入口基本结构的基础上,着重针对与电子数据取证密切相关的项目予以分析,并通过实例说明利用该类型文档结构进行电子数据取证的具体流程与方法。     

计算取证中的异常文件发现

在计算机取证中，寻找证据的过程是最耗费时间的一个阶段，是计算机取证自动化的瓶颈。为了解决这一问题，提出了一种取证目标自动确定的新方法，通过孤立文件检测法找出安全事件中产生的异常文件。实验结果表明，这种方法能快速找出系统中隐藏的异常文件，加快证据搜索的速度，进而提高整个计算机取证工作效率。     

AOPR软件在计算机取证中的应用

计算机取证过程中,取证人员往往要对涉及MicrosoftOffice文件进行取证分析,以发现线索,获取证据,但是其安全性功能的设置往往对侦查人员的取证活动造成障碍,本文主要介绍一款名为AdvancedOfficePasswordRecovery(AOPR)的软件,该软件使用多种方法破解文件,获取密码,最终成功打开文件,以及在使用中的优点和应当注意的问题。     

隐藏文件教你几招

我的电脑里有很多重要的文件不希望别人看到,为了把这些最高机密隐藏起来,我可是费尽了心机,单纯的修改文件的隐藏属性,不能有效的隐藏文件,很容易就会被找出来。经过了一番摸索,我又找到了几种更加巧妙的隐藏文件和文件夹的方法。     

计算机系统信息隐藏反取证技术

研究了现代计算机系统信息隐藏的各种可能方式.运用HPA和DCO、隐藏分区等技术分析了磁盘驱动的数据隐藏,运用簇分配、Slack空间等技术分析了NTFS文件系统的各种信息隐藏方法,以及各种方法可能的检测手段.分析各种隐藏技术作为计算机反取证手段,给计算机取证带来的巨大影响.     

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.