CD-ROM技术讲座——第四讲 在网络上使用CD-ROM

CD-ROM是用于局域网自然的存贮媒介.本文讨论CD-ROM用作网络资源的优点,讨论在网络上共享CD-ROM的三种基本方法及各自的优缺点,讨论有关CD-ROM的网络许可证问题,最后提出CD-ROM上网所遇到的共同问题.1 在网络上使用CD-ROM的优点在CD-ROM技术出现之前,存取大容量数据只有     

基于Windows NT的光盘数据库网络

随着CD-ROM技术的飞速发展,以CD-ROM为基础的文献信息数据库在国内外大量出版发行,文献的数字化推动了图书馆的信息技术应用。以CD-ROM光盘为基础的情报检索系统在我国图书馆、情报信息机构中得到广泛应用,并已逐步发展成为以光盘塔(CD-Tower)为基础的光盘数据库网络。由于光盘数据库网络投资低,数据容量大,维护。检索方便,已成为大、中型图书馆和情报信息机构信息化建设与发展的主要目标。     

在Novell网实现CD-ROM共享服务

一些专业厂家为了开拓网络CD-ROM资源共享的新应用,推出了存储服务器。存储服务器通过在网络中添加共享存储区实现网络用户对共享CD-ROM的高速访问。这种方案具有安装简单、服务全面的特点。但因为是新品推出,价格往往偏高,用户在应用维护方面对厂家会有较多的依赖。针对这一情况,网络用户完全可以用较少的投资自己安装配置Novell网CD-ROM共享服务。本系统与网上其他服务器各有分工,这样便于管理。安装、启动或停用本系统并不影响整个网络的正常运行。     

CD-ROM在企业界的应用(连载之五)

3.4.3使用 使用CD-ROM在技术上对基础设施要求不高。根据不同环境和使用场合,CD-ROM播放机可放在用户处(单站的),也可与网络服务器(远程的)相联。 如果CD-ROM被用作传播媒体,CD上的信息将在目的地被复制到本地媒体上。例如,用这种方法分发的软件包可以被安装到硬盘上。 如果能够直接从CD-ROM上查阅信息,技术障碍将很小。把CD-ROM放在播放机里,可能运行一个安装程序足够了。开发者应确保安装尽可能简单,以使产生错误的机会减到最小。     

七张光盘一起放——惠普CD-ROM塔不需频繁换

针对目前的局域网管理员需要频繁更换CD光盘应付网络不同用户的需求,惠普公司推出了一款带有七个CD-ROM的光盘塔产品HP SureStore CD-ROM服务器塔。在SureStoreCD-ROM服务器塔上,惠普设计了七台CD-ROM的扩展空间,用户可以在开始的时候只按需购买少量CD-ROM,随着业务的增长再添加光驱的数量。每个CD-ROM在Windows95中的资源管理器中显示为一个网络驱动器。为了适应未来DVD产品增长的趋势,这种光盘塔未来还可以使用DVD驱动器。这种CD-ROM服务器塔使用了网络附带存储技术(Network-Attached-Storage),     

完全镜象

通常网络用户都是以容纳多个CD-ROM驱动器的光盘库的形式来使用CD-ROM的。Microtest DiscportVT CD-ROM服务器为你提供了一个更具效率和可伸缩性的解决方案,它可以在硬盘上为CD-ROM的内容或镜象提供缓冲。用户们就象访问任何一个映射的网络驱动器一样对这种服务器进行访问。     

Novell局域网共享CD-ROM

资源共享是网络的基本功能。在计算机技术突飞猛进的今天,CD-ROM作为一种信息的载体,以其高容量和低价格的特点,越来越多地受到用户的青睐。因此,如何将CD-ROM安装为服务器上的一个卷并使得客户工作站能够共享CD-ROM就日益成为一个管理员经常性的和重要的任务。本文介绍IDE接口CD-ROM在NetWare 3.12操作系统中的安装与配置过程。 一、CD-ROM的硬件安装 与在一台计算机上安装一个光驱的过程一样,关键是正确设置主从设备。若CD-ROM与硬盘共用一条数据线,     

俯瞰带接入网络的明日帝国

不久前还只能遐想的梦幻体验。在技术方魔力的催化之下今日就右能成为现实，相比从CR5T显示器到液晶显示器，CD-ROM到DVD刻录机这类变化。无论是有线网络接入Modem演进ADSL，以太网，还是无线网络接入从WAP演进到GPRS、CDMA，网络拉入由窄变宽是一个更深邃的进化过程。     

迟来的春天——高速CD-ROM与期望值相距甚远

CD-ROM制造商终于制造出了他们长期以来所承诺的真正的高速CD-ROM产品,然而这一刻的到来对于CD-ROM这一日益落伍的技术似乎已经于事无补了。近期,ZenReserach公司将宣布推出一款具有40倍速的新型CD-ROM驱动器。目前,市场上最高速的CD-ROM驱动器为32倍速,然而分析家认为CD-ROM驱动器的实际数据传输速度比其所声明的速度要低的多。“长期以来,CD-ROM制造商们一直在围绕倍速问题做文章。他们声称其     

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.