动态多元分类属性的Hyperbolic Tree可视化

以表格和链接节点树为形式的分类数据展示,存在层次关系不明显和无法表达大规模层次结构的局限性。针对表格形式存在的分类型数据,本文设计和实现了基于Hyperbolic Tree(双曲树)的动态多元分类属性可视化方案。该方案首先根据给定的多元分类属性序进行基于表格数据的分支结构树构建,进而采用双曲线树对分支结构树进行可视化,最后通过调整多元分类属性的序实现动态可视化。同时,以国家电网营业网点分布数据为对象,对更改主次分类属性的动态可视化进行实验,既可以直观地展示网点的地理区域分布特性,也可用于辅助网点的分类与聚类。     

基于极坐标布局的农残检出倾向性可视分析

针对食品安全领域中农残检测数据的快速可视分析需求，提出了一种基于极坐标的旋转布局可视化方法。该方法首先按照用户的分析需求将数据信息进行分类统计；然后将检出农药的数据统计结果映射为农药圆，将农产品的数据统计结果映射为农产品图元，采用基于极坐标的旋转布局方式，将农药圆布局于环形结构中，将农产品图元布局于环形结构内部。通过图元偏移、鱼眼放大、多尺度筛选、半透明图形、添加同径向方向的标签以及调节农产品图元半径的方法降低农产品图元的重叠问题。实验结果与领域专家评价结果显示，提出的方法能快速地可视化数据集中的高兴趣度信息，既突出了多种农产品检出农药的倾向性，又同时对多附加属性实现直观简洁的显示。     

一种层次结构中多维属性的可视化方法

在很多领域的统计分析中,通常需要分析既具有层次结构又具有多维属性的复杂数据,如食品安全数据、股票数据、网络安全数据等.针对现有多维数据和层次结构的可视化方法不能满足对同时具有层次和多维两种属性数据的可视分析要求,提出了一种树图中的多维坐标MCT(multi-coordinate in treemap)技术.该技术采用基于Squarified和Strip布局算法的树图表示层次结构,用树图中节点矩形的边作为属性轴,通过属性映射、属性点连接、曲线拟合实现层次结构中多维属性的可视化.将该技术应用于全国农药残留侦测数据,实现了对全国各地区、各超市、各农产品中农药残留检出和超标情况的可视化,为领域人员提供了有效的分析工具.MCT技术也可用于其他领域的层次多属性数据的可视化.     

基于Venn图的层次信息可视化

为解决具有层次结构的大量信息的可视化问题,文中给出了用嵌套圆表达树型结构信息的可视化方法,即用相切的圆表示兄弟节点,嵌套的圆表示父子节点,圆的位置、大小和颜色分别表示树节点的不同属性信息.同层的兄弟节点并排排列,圆的排列算法快速、稳定、紧密且不相互重叠,排列圆的个数与时间呈线性关系,该排列算法适于大量信息的可视化,既能快速显示大数据集的整体视图,又方便查看细节信息;既能清楚地表达复杂信息间的层次关系,又能显示树节点的属性.该方法可用于文件系统的可视化,实例表明该方法简单、实用、高效、可靠.     

VB6.0中TreeView控件的使用

TreeView控件用于显示具有层次结构的数据,通常用来显示繁杂信息。本文介绍了VB中TreeView树型控件的属性、结点对象的添加方法,重点介绍了用TreeView控件分层显示数据库信息的实现。     

VB6．0中TreeView控件的使用

TrceView控件用于显示具有层次结构的数据，通常用采显示繁杂信息。拳文介绍了VB中TreeView树型控件的属性、结点对象的添加方法．重点介绍了用TreeView控件分层显示数据库信息的实现。     

面向海量层次信息可视化的嵌套圆鱼眼视图

针对海量层次信息可视化问题,提出嵌套圆鱼眼视图及实现方法.首先分析了相关工作;然后构造了针对同层兄弟节点的变形函数,给出了针对焦点节点同层兄弟节点的外切圆变形排列算法、变形后节点的子节点的嵌套圆递归排列算法及将二维鱼眼视图映射为三维鱼眼视图的方法;最后将该方法应用于计算机文件系统可视化.实验结果表明:该方法在相对小的显示空间内,既能显示海量信息的整体视图,又能突出局部焦点细节信息,具有较高的任务完成效率与用户满意度.     

VRML可视化编辑器的研究与开发

对虚拟现实建模语言VRML可视化编辑器进行了研究,设计并实现了VRML可视化编辑器VisualVRMLEditor.构造了一个节点树视图,描述VRML文件的内部数据结构;构造了一个三维场景视图,显示了VRML文件所描述的三维场景;构造了一个路由视图,将路由这种无形的机制进行可视化编辑.实现了将节点树视图和三维场景视图结合起来,方便用户操作.此外,将路由这种无形的信息可视化,使用户能够进行可视化编辑路由,不用记住繁琐的VRML语法规则,提高了编辑VRML文件的效率.     

一种时序数据的可视化技术与工具

时序数据在许多研究领域中都广泛存在.信息可视化是对时序数据进行分析的有力工具,然而已有的时序数据可视化技术无法较好地分析时间跨度长的时序数据.提出一种称为FisheyeLines的可视化技术,能够快速显示大数据集的整体视图,同时方便查看细节信息;能够清楚地表达复杂信息间的相互关系,同时可以显示对象的属性.基于FisheyeLines可视化技术,还给出了一种称为FisheyeLinesVis的可视化工具,可以方便地构造时序数据可视化应用.对以上技术和工具所构造的应用实例的分析与评估充分验证了该方法的有效性和易用性.     

一种基于混合布局策略的高校教师业绩数据可视化方法

高校教师的业绩数据对于教师的考核评优、薪资提升、岗位聘任和职称晋升等人事决策具有十分重要的作用。针对其兼具复杂层次特征和多维属性的特点,提出了一种基于圆形嵌套图和平行坐标的VPM(Venn Parallel Coordinates Mixing)混合可视化方法。该方法首先采用基于D3布局算法的圆形嵌套图表示层次结构,而后划分叶子节点的圆周为不同的属性轴,通过布局设计、属性映射、属性点连接及缩放、高亮等用户交互来实现层次结构中多维属性的可视化。将该方法用于教师业绩数据,实现了对学院、研究所、教师各层级结构的可视化,可清晰展示数据项的细节信息。实验结果表明,提出的VPM方法能有效地展示教师的业绩数据,评价结果亦符合实际情况,能帮助系统用户——院校管理者对教师进行更好的管理及业绩考核。     

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.