问答系统研究现状

问答系统是信息检索的高级形式,也是该领域的研究重点和热点。该文首先给出问答系统的定义,然后对现有各类问答系统进行了介绍,并对其核心技术、测评标准进行了分析,最后对问答系统的发展方向进行了展望。     

西安协同构建云南政协BMS系统案例

云南省政协BMS系统是一个先进的一体化集成系统,实现对集成的各智能化子系统进行综合管理。它集成了楼控系统,综合安防系统（电视监控、防盗报警、门禁管理）,消防系统,停车场系统。整个系统是基于网络的,通过浏览器的方式进行管理。通过BMS系统,用户通过浏览器对这些子系统进行综合管理。     

基于S函数的时变系统仿真

为了对复杂的控制系统进行优化控制,就要对系统特性有比较清楚的了解,对系统进行仿真是常用的一种方法。Mat-Lab软件是系统仿真的优秀工具,其Simulink能仿真大多数的系统,只是有些模型Simulink并没有直接给出,例如时变系统,而S函数是扩展Simulink功能的有力工具。该文对基于S函数的时变系统仿真进行了研究,并与等效变换法进行了比较,结果证明S函数是解决时变系统仿真的有力工具。     

谈谈软件开发系统文档的书写——以企业合同销售为例

系统文档是讲述系统需求分析和系统系统逻辑设计,是系统分析阶段的成果,放映系统设计阶段调查和分析的全部结果。系统文档他是下一步进行系统设计与实现的纲领性文件。用户可以通过系统文档来验证和认可新系统的开发策略和开发方案,系统设计师可以使用系统文档来进行前台界面设计和后台数据库设计,作为指导系统设计工作的标准。系统文档完成后,经过相关人员论证,找出问题并及时进行解决。可以使得系统分析做的更完善、更详细、更切合实际。     

嵌入式系统硬件可靠性Copula方法建模与分析

嵌入式系统硬件的可靠性是十分重要的,它直接关系到嵌入式系统的质量和寿命。为了对嵌入式系统的硬件可靠性进行分析,利用Copula方法从硬件角度和层面对其进行研究。首先从嵌入式系统硬件的组成层面对其进行抽象定义;然后从组成嵌入式系统硬件的每个功能模块出发,对每个功能模块从软硬件综合角度进行可靠性建模,同时利用Copula函数建立了嵌入式系统硬件的可靠性模型;最后对嵌入式系统硬件可靠性模型的参数进行估计,给出具体的嵌入式系统硬件可靠性计算实例,并将所建立的模型与其他类型的Copula函数进行比较。通过实例化分析和验证结果表明,得到的嵌入式系统硬件Copula函数模型是切实可行的。     

关于机电安装施工技术中消防弱电系统的安装探究

在进行建筑机电安装的时候,安装消防弱电系统是需要多个方面进行的,比如说电话系统、闭路电视系统以及火灾自动报警系统等等。本文主要就建筑机电安装中,怎样更好的安装消防弱电系统进行了简要的分析。     

混杂系统研究综述

混杂动态系统是当今研究的热点。本文对混杂动态系统的研究进行了概述,在介绍混杂系统概念的基础上,对系统模型的分类,特别是对系统的分析及优化进行了总结,并对以后的研究方向进行了展望。     

基于ANFIS的非线性系统辨识研究

系统辨识是控制系统设计的基础,对非线性系统进行辨识是当前的难点;文献[1]提出了用模糊建模方法,文献[2]提出了用神经网络方法,在总结上述方法不足的基础上,该文提出了用自适应神经模糊推理系统(ANFIS)对非线性系统进行辨识的方法,仿真结果表明,ANFIS进行非线性系统辨识是可行的,其辨识精度很高。     

车站联锁进路控制逻辑的形式化方法

基于计算机联锁系统是一个对列车行驶系统提供安全条件的系统,车站联锁系统是保证车站行车安全和提高运输效率的典型安全苛求性系统。以形式化 方法Event-B为基础,引入角色Agent对联锁系统进行规范定义,通过智能体与Event-B的建模和验证,构造了车站联锁进路控制逻辑形式化验证模型,并进行 了形式化规范和推理,该模型在RODIN平台上进行验证,通过实例验证,满足了计算机联锁系统的安全需求。     

LNG船液货安全系统的设计方法研究

LNG船是用于运输低温常压的液化天然气的大型船舶,由于液化天然气的特殊性质,对LNG的运输船提出了更高的安全要求。LNG船液货安全系统是船舶安全运行的重要保证。IEC61511标准是专门用于指导功能安全系统设计的标准,为LNG船液货安全系统的设计提供了有利的指导。遵循IEC61511标准对LNG船安全系统进行设计能够确保整个安全系统的可靠性。文章首先对安全生命周期进行了介绍,然后根据安全生命周期对LNG船液货系统中的安全功能进行分析,设计,为同类系统利用标准进行安全系统的设计提供了借鉴作用。     

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.