计算机教学中的桌面虚拟化应用技巧

桌面虚拟化技术在计算机教学中应用较多,能给教学带来便利与提高教学效果。本文总结和归纳了10条运用技巧和经验,这对加强虚拟环境下的存储系统的管理,支撑整个虚拟化系统良好运行有着十分重要的现实意义。     

排版软件与文字处理软件间的有效格式转换方法

排版软件具有强大的图形、图像处理能力,应用极为广泛,然而其与Word等文字处理软件存在不兼容性,需要采用有效的格式转换方法对排版软件与文字处理软件不能兼容的格式进行转换。在此,文字针对广泛应用的方正排版软件和Word文档的格式转换方法进行了论述。     

桌面虚拟化在涉密网内的应用研究

计算机虚拟化的概念已经深入人心,当前虚拟化技术主要包括服务器虚拟化、应用虚拟化、桌面虚拟化。其中,桌面虚拟化技术是当前发展最快的,也是最具有应用前景的技术。但是在国内一些有安全保密要求的企业,桌面虚拟化却面临着叫好不叫座的尴尬局面,这其中的主要原因是,涉密网用户在采用虚拟化方案的过程中,会遇到诸如网络带宽、大数据量读写、计算机端口审计、用户身份认证、防火墙限制等问题,这些都为涉密网用户进行虚拟化方案的实施和部署提出了的挑战,本文将针对这些问题进行分析探讨。     

桌面虚拟化技术在多媒体教室管理中的应用

本文分析了多媒体教室管理的现状,提出通过桌面虚拟化技术解决日常管理中存在的管理难度大、维护人员多、管理效率低等问题,努力提高多媒体教室管理的集中化、安全性和高效率。     

实验室计算机桌面安全管理策略研究与实践

实验室计算机系统环境的好坏会对教学质量产生较大影响。通过对高校计算机实验室存在的桌面安全问题进行全面分析,并针对高校计算机实验室的特点．提出实验室计算机桌面安全管理策略,并进行实践应用,从而提升实验室计算机的可用性,净化实验室的教学环境,提高教学的效率。     

用远程桌面在局域网中分享一台电脑上网

如何用最简单的方法让其他电脑通过被称之为服务器的电脑上网呢？本文介绍的方法是：既不用安装其他软件,也不需要添加任何设置,就能使多台电脑一起上网,并可以组成一个集开机、操作、教学演示、关机于一体的自治系统。     

A Resource Selection System for Cycle Stealing in GPU Grids

This paper presents a resource selection system for exploiting graphics processing units (GPUs) as general-purpose computational resources in desktop Grid environments. Our system allows Grid users to share remote GPUs, which are traditionally dedicated to local users who directly see the display output. The key contribution of the paper is to develop this novel system for non-dedicated environments. We first show criteria for defining idle GPUs from the Grid users’ point of view. Based on these criteria, our system uses a screensaver approach with some sensors that detect idle resources at a low overhead. The idea for this lower overhead is to avoid GPU intervention during resource monitoring. Detected idle GPUs are then selected according to a matchmaking service, making the system adaptive to the rapid advance of GPU architecture. Though the system itself is not yet interoperable with current desktop Grid systems, our idea can be applied to screensaver-based systems such as BOINC. We evaluate the system using Windows PCs with three generations of nVIDIA GPUs. The experimental results show that our system achieves a low overhead of at most 267 ms, minimizing interference to local users while maximizing the performance delivered to Grid users. Some case studies are also performed in an office environment to demonstrate the effectiveness of the system in terms of the amount of detected idle time.     

实验室计算机桌面安全管理策略研究与实践

实验室计算机系统环境的好坏会对教学质量产生较大影响。通过对高校计算机实验室存在的桌面安全问题进行全面分析,并针对高校计算机实验室的特点,提出实验室计算机桌面安全管理策略,并进行实践应用,从而提升实验室计算机的可用性,净化实验室的教学环境,提高教学的效率。     

Word文档的使用技巧

Word文档的使用越来越受到人们的欢迎,把使用Word文档时的技巧简单的介绍一下。     

正则表达式在Word中的应用

微软在Word 2000及后续所有版本中,提供基于正则表达式的查找替换功能,可对文中符合正则表达式规则的文字实现一次定位选中,并可对查找到的文字按照替换表达式进行批量替换。Word正则表达式提供包括转义符、限定符、定位符、字符集合、分组符、反向引用等元字符功能。Word正则表达式可结合文本格式功能实现联合查找。     

Desktop video conferencing in the organisation

While the potential advantages of video conferencing are appealing, the technology has not been implemented in more than a handful of organisations. This is likely to change in the future as video conferencing moves to the desktop. This paper examines the issues surrounding the area and, in particular, attempts to determine the impact of video conferencing on organisations. A framework is provided for understanding desktop video conferencing in the organisational context, and the relative benefits of and problems in the use of desktop video conferencing are discussed. Finally, a number of suggestions are made on how organisations may reconcile the implications of utilising desktop video conferencing technology.     

基于箱聚类的差分隐私直方图发布方法研究

在现有的基于差分隐私保护的直方图发布聚类处理算法中,没有算法考虑对方差较小与方差较大的直方图计数集加以区别对待,从而在处理方差较小的直方图计数集时造成算法复杂度过大.针对方差较小的直方图计数集,提出一种基于临近箱计数差值的分割策略.首先,通过计算相邻单位箱计数的差值确定分割边界;然后,根据重构误差与加噪误差的总量变化判断每次分割的可行性;最后,通过理论分析和实验仿真,该算法在保证发布数据准确度的同时,极大地提高了算法效率,从而验证了该算法的有效性.     

一种基于词编码的中文文档格式

分析了汉语自动分词问题产生的根源和面临的困难,针对性地提出了一种基于词的中文编码方法和中文文档新格式,实现了以词作为中文文本的最小信息载体,使中文文本分析可以在词平台上实现,避免了自动分词对中文信息处理带来的障碍.基于中文词的编码方法,以每个词作为一个单位,对词进行编码.此方法避开了中文的自动分词问题,特别是解决了歧义切分的难题,并提出了一种利用文档格式解决未登录词问题的新思路.采用统计分析方法对词平台基础上的关键词自动抽取进行了实验研究,取得良好效果.     

基于TCP/IP协议的桌面视频会议系统传输控制的实现

本文介绍一种基于 ＩＰ Ｍｕｌｔｉｃａｓｔ实现方式的多点桌面视频会议系统模型,讨论了在我们开发的桌面 会议系统中视频、音频流实时传输控制的实现方法。     

EuLisp in education

We present our experience withEuLisp as a teaching language, focussing on the level of the language which was specifically designed for this purpose (level-0).EuLisp has been used in undergraduate and postgraduate teaching since 1990, in lectures and laboratories, where in many cases it has replaced Scheme or Common Lisp. It has been used extensively in programming courses, parallelism courses, as a vehicle for advanced courses in symbolic computing and programming language design; it has also been used as a platform for final year undergraduate projects. This experience has demonstrated thatEuLisp is well suited to teaching and far reaching in its capabilities: it supports the relevant concepts in a consistent and versatile framework, so that the language serves to facilitate the educational process. The discussion is illustrated with examples, and where appropriate we draw a comparison with the Lisp dialects used previously in these courses.     

GPU implementation of neural networks

Graphics processing unit (GPU) is used for a faster artificial neural network. It is used to implement the matrix multiplication of a neural network to enhance the time performance of a text detection system. Preliminary results produced a 20-fold performance enhancement using an ATI RADEON 9700 PRO board. The parallelism of a GPU is fully utilized by accumulating a lot of input feature vectors and weight vectors, then converting the many inner-product operations into one matrix operation. Further research areas include benchmarking the performance with various hardware and GPU-aware learning algorithms.     

ASAP: Eliminating algorithm-based disclosure in privacy-preserving data publishing

Numerous privacy-preserving data publishing algorithms were proposed to achieve privacy guarantees such as ?‐diversity$?\text{‐}\mathrm{diversity}$. Many of them, however, were recently found to be vulnerable to algorithm-based disclosure—i.e., privacy leakage incurred by an adversary who is aware of the privacy-preserving algorithm being used. This paper describes generic techniques for correcting the design of existing privacy-preserving data publishing algorithms to eliminate algorithm-based disclosure. We first show that algorithm-based disclosure is more prevalent and serious than previously studied. Then, we strictly define Algorithm-SAfe Publishing (ASAP) to capture and eliminate threats from algorithm-based disclosure. To correct the problems of existing data publishing algorithms, we propose two generic tools to be integrated in their design: global look-ahead and local look-ahead. To enhance data utility, we propose another generic tool called stratified pick-up  . We demonstrate the effectiveness of our tools by applying them to several popular ?‐diversity$?\text{‐}\mathrm{diversity}$ algorithms: Mondrian, Hilb, and MASK. We conduct extensive experiments to demonstrate the effectiveness of our tools in terms of data utility and efficiency.     

试题库中图文数据混合输入输出的研究

探讨了智能组卷系统中试题库设计和研发中,图形和文本的混合存储以及输出技术这一问题的解决,在很多应用中所采用的方案是将图形信息和文本信息分开处理,或者存储图形的存放路径,使用上述方法得到的排版结果均不够理想,而且存储繁琐,针对这一问题,利用Visual basic开发了专门的图文数据共同存储输出程序,并实现了预期的效果。     

The deviation of a set of strings

This paper introduces the concept of set deviation as a tool to characterise the deviation of a set of strings around its set median. The set deviation is defined as the set median of the positive edit sequences between any string and the set median. We show that the set deviation has the same properties as the classic second-order statistical moment. This approach is generalised to higher-order-moments of a set of strings. We then show how the set deviation can be efficiently used in well-known statistical algorithms to improve the computation of the set median of a set of strings, illustrating this concept with several examples, particularly in post-processing of texts extracted from video sequences.