超融合在高校私有云建设中的研究

伴随着云计算技术的快速发展,高校在构建数据中心的过程中开展了私有基础设施云建设,借助云管理平台来改善高校资源利用效率。而超融合架构的提出和应用,实现了对网络、存储以及计算虚拟化等的有效融合,能够在数据中心发挥分布式存储资源池的功能,使高校私有云拥有更加良好的存储环境。本研究论述了基于超融合架构开展高校私有云建设的意义,对高校私有云基础架构进行分析,并总结了超融合在高校私有云建设中应用,以期在高校私有云建设中充分发挥超融合架构的优势,简化系统管理。     

基于私有云和物理机的混合型大数据平台设计及实现

大数据分析技术的广泛应用离不开大数据平台的支撑,构建大数据平台已经是很多企业和机构的重要需求。构建大数据平台需要复杂的系统性的技术,特别是需要考虑系统性能和可扩展性两方面需求。随着数据体量不断增大、用户需求不断增多,规划时的数据平台规模很可能不能满足不断变化的需求。因此,设计了一种混合的大数据平台架构:混合使用物理服务器和私有云云主机的大数据平台。这样就兼顾了性能和可扩展性:由于物理服务器性能一般要高于云上的虚拟机,所以构建在物理服务器上的大数据平台,性能一般要好于构建在私有云上大数据平台;从私有云上启动云服务器非常方便、快捷,所以大数据平台的计算和存储结点可以动态弹性地扩容到私有云上,从而保证高峰期的时候大数据平台仍然可以有充足的处理能力。在生产环境实现了这种混合型设计,在生产环境中的测试也表明了这种设计的有效性。     

云计算技术在高校实践教学中的应用研究

分析了高校基础设施应用现状对教育改革进一步深化的影响,在研究云计算技术的基础上提出了实践教学私有云平台构建模型,并运用开源框架Eucalyptus和gridsphere对实践教学私有云平台提出了设计与实现,取得了较好的效果。     

基于OpenStack的私有云平台设计

云计算是当前计算机领域非常热门的研究方向,在此背景下,阐述了云计算、私有云的相关概念及其应用。详细介绍了开源云计算框架Open Stack及其核心组件。提出了一个基于Open Stack的私有云平台架构方案,在实际工作中部署了私有云平台并对相应的计算、存储、网络、镜像等资源进行管理。     

基于Hadoop的云存储技术在档案馆的应用研究

随着大数据和云计算的应用,传统档案馆的信息储存方式已无法适应大数据时代的新要求。笔者基于Hadoop平台介绍了HDFS分布式文件系统和Map-Reduce计算框架,探索了基于Hadoop的档案馆云存储构架,并结合其优势以及档案馆提供的不同类型服务,讨论了其在档案馆应用中的优势和未来的发展趋势。     

浅析私有云的构建策略

私有云是一个私有的云环境,它可以提高资源配置效率,存储和处理私有数据,执行敏感任务.本文分析了私有云的特点,提出了构建私有云的策略.     

基于NAS的私有云存储平台的设计与实现

随着大数据时代的到来与高速网络建设的快速推进,数据化网络资源共享已渗透到人们的日常工作、学习、生活当中。数据网络化储存、多人资源共享成为现代信息传播与保存的重要方式。但是,网络储存平台的安全性一直令使用者担忧。因此,各种各样的私有云储存平台孕育而生,为使用者提供相对独立的个人使用空间。经过长期的使用发现,传统的私有云存储平台虽然可以达到一定的安全性,但是,安全性只相对公共开放网盘而言。同时,存在多用户瞬时访问下协议拥堵、大数据交互节点回馈延迟高的问题。针对传统私有云的架构特点与问题产生原因,提出基于NAS的私有云存储平台的设计与实现方法。采用基于NAS的协议加密技术、多路访问优化单元、数据压缩单元对传统私有云存在的问题进行针对性解决。通过仿真实验证明,提出的基于NAS的私有云存储平台的设计与实现方法,具有数据储存安全性高、峰值状态下访问点网络畅通性好、数据网络传输交互率高、延迟小等优点。     

IT技术与产品

龙存科技：大规模私有云存储的实践者 当越来越多人关注云计算和云存储如何与实际相结合时,北京龙存科技有限责任公司已开始进行云存储的实践,真正用云存储技术造福用户。今年上半年龙存科技通过完全自主研发的大规模私有云存储技术帮助中国国际广播电台建造了面向国际台几千位员工的私有云存储系统,为所有的员工提供了集中安全的数据存储平台。     

电子档案数据永久存储的安全保障研究

电子档案是现代档案馆中数据资料的主要保存形式,电子档案与传统的纸质档案相比,有着较多的优势,不但数据的完整性高,而且保存的时间比较长,还可以方便档案数据的查找。电子档案数据永久存储是当前档案馆中一项重要的工作,保证存在的安全性也是档案管理人员需要重点解决的问题。本文对电子档案存储的基本特征进行了分析,还对电子档案数据永久存储的安全保证策略进行了研究,以供参考。     

基于Hadoop的数据云存储研究与应用

随着教学平台数据的爆炸式增长,传统的教学平台在海量信息处理方面带来了较大的压力,对数据的存储、检索等关键技术提出了更高要求.在研究分析云计算领域的基础上,提出了利用Hadoop云计算框架解决教学平台中海量数据存储、检索的问题,优化了平台的数据存储和检索功能,并对平台做了系统的测试和验证.     

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.