一个支持自然语言提问的智能答疑系统的实现

针对远程教育中答疑活动的开展方法,指出支持自然语言提问的智能答疑系统是远程教育的发展方向.通过分析国内现有智能答疑系统存在的缺点,提出了一个智能答疑系统的模型.围绕该模型,介绍了实现该模型的关键技术.同时,对模糊检索的现有算法提出改进,并给出相应的实现程序.另外,为了提高智能答疑系统的效果,介绍几种相应的辅助手段供参考.最后,作者指出系统对人工依赖性较强,在索引的组织形式上还有待进一步探讨.     

自动分词算法在智能答疑系统中的应用研究

汉语自动分词是远程教育智能答疑系统的基础,如何根据远程教育智能答疑系统的特点进行相关分词算法的设计是提高答疑系统智能性,促进智能答疑系统发展的关键所在.针对现有答疑系统智能性不好的问题,在介绍几种常见分词算法的基础上,提出了一种改进型的自动分词算法,对该算法及其在智能答疑系统中的应用进行了分析,有利于提高智能答疑系统答疑的准确性和智能性,具有一定的实用价值.     

基于Web的智能答疑系统的设计与实现

本文简单分析了目前智能答疑系统的现状,并指出了它们存在的不足;在此基础上提出了一个智能答疑系统的结构模型,主要介绍系统中FAQ库的自动形成机制,并给出系统中的关键实现技术。     

基于本体的智能答疑系统的研究与实现

答疑系统是现代远程教育不可缺少的一个组成部分.针对目前答疑系统在知识共享和问题求解精确性方面的不足,提出了一种基于本体的智能答疑系统模型.该模型对于学生输入的问句,利用浅层语义分析技术,首先生成问句向量,再利用SPARQL查询语言,在本体库中查找答案.分析与研究了该系统所涉及的关键技术,以计算机应用基础课程为例,构建课...     

分布式环境下智能答疑系统平台的研究与实现

针对远程教育智能答疑系统中的知识资源不足的问题,提出采用M ob ile A gent技术、用XM L表示知识构建分布式环境下多站点之间的智能答疑平台,通过知识资源搜索完成答疑任务并补充和完善本地知识资源;讨论了系统所采用的A gent通信机制和路由策略。实验表明,使用该系统搭建起来的平台能够实现多个网络教育站点共享,解决答疑资源不足问题。     

基于领域本体智能答疑系统的设计

答疑系统是远程教育系统的重要组成部分,针对传统答疑系统功能相对简单而且无法得到理想的答案等特点,提出一种基于领域本体智能答疑系统的设计。文章首先提出智能答疑系统的模型,并进行领域本体和问句语料库的构建研究,同时利用分词处理和关键词扩展技术进行问句查询的扩展,最后通过语句相似度的匹配方法,提升系统查询的准确率。     

智能答疑中问题相关度算法研究及系统实现

针对现有答疑系统缺乏智能性和人机交互不够友好的不足,提出了一个智能答疑系统实现方案。为提高系统中问题与答案的匹配准确程度,着重对问题相关度算法进行了研究,在自动分词后用关键词集合相似度来计算问题的相关度,通过有监督的机器学习BP模型建立一个适合智能答疑系统的学习模型来优化分词权值。实验证明,这种算法可以帮助智能答疑系统提高准确性和智能性,具有一定的实用价值。     

社区医疗智能答疑系统的设计与实现

针对社区医疗服务中咨询答疑特点及现有答疑系统存在的不足,本文提出了一个基于B/S模式的智能答疑系统设计方案,采取全自动智能搜索与半自动辅助答疑相结合的方式,建立系统结构模型,解析各个模块功能,其中重点探讨了句子相似度算法的改进,并实现了其在医疗领域的应用。     

一种用于网上学习的智能答疑模型

对Web平台上E-lerarning系统智能答疑模型进行了讨论。着重论述了问题答疑模型的体系结构，交互式问与答的实现方法，答疑知识库系统等问题。并通过一个具体的实例介绍了智能答疑系统的功能与特点。     

基于Web挖掘的个性化远程教育系统研究

针对现在网络远程教育存在的系统教育模式单一问题,通过介绍Web挖掘在远程教育系统中的应用,指出了Web挖掘的基本过程和关键技术,提出了一种基于Web挖掘的个性化远程教育服务系统模型,重点论述了应用Web挖掘进行个性化远程教育服务系统的体系结构及其个性化引擎实现.实践证明基于Web挖掘技术在远程学习系统中的应用提高了学习系统的个性化服务水平,为系统的决策分析提供了智能的辅助手段.     

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.