基于SiPESC平台的卫星编队飞行视景仿真系统设计和实现

针对卫星编队飞行视景仿真的需求,基于SiPESC平台设计并实现视景仿真系统SiPESC.SatFly.在架构设计层,基于SiPESC平台,采用插件式体系结构,将功能需求易于变化的部分设计为独立插件;在系统实现层,结合OGRE(Object-Oriented Graphics Rendering Engine)渲染引擎和XML,实现预设方案的灵活配置;在仿真应用层,实现近地轨道卫星编队飞行和卫星轨道转移过程仿真.该系统通用性强,配置灵活,场景渲染逼真,并且提供多窗口、多视角的观察模式,方便数据分析和概念理解.     

基于PB的通用编码帮助系统的设计与实现

MIS系统中,编码的应用是整个管理系统的关键,为提高软件的开发效率和实现模块的通用性,采用PowerBuilder做为工具,开发了通用编码帮助系统.在开发过程中,充分利用了PB的动态数据窗口技术,提高程序的灵活性和可重用性,并给出了详细的开发思想和具体的编码过程.实践表明,通用系统不仅有助于缩短开发周期,并可以使应用程序更加规范化,宜于系统的维护和使用,同时在软件的可重构性方面也进行了有益的尝试,适应将来软件行业的可重构性的要求.     

基于微服务的维修资金管理系统

为了解决传统住宅维修资金管理系统功能模块复杂,开发维护过程繁琐,并且新增需求难以及时处理,提出了基于微服务架构的系统设计开发.本文设计了基于微服务架构的住宅维修资金管理系统,将系统划分为几个微服务模块分别实现.系统使用Spring Cloud来搭建微服务架构,并且实现了服务注册和发现、负载均衡、路由网关以及容错处理等技术,最后实现了各个微服务功能.采用该微服务框架,降低了系统的耦合性,加快了系统开发周期以及使系统的部署和维护更为便捷.     

可重构异构系统结构研究

可重构异构系统是由通用微处理器、可重构模块、专用ASIC、IO接口等资源构成的异构并行处理系统,文中提出的可重构异构系统结构融合了不同的计算资源,使系统中的某些资源能够很大限度地满足某种应用的模式和处理要求.系统中可重构模块的硬件功能可以通过在线重构技术加以改变,各模块之间的互连关系可通过重构互连控制器调节和仲裁.这种可变性使计算系统能适应更大范围的应用需求,向一体化和高性能的方向发展.     

设计模式和泛型技术在系统重构中的应用研究

重构是在不改变代码外在行为的前提下,对代码做出修改,以改进程序内部结构的过程.设计模式是对被用来在特定场景下解决一般设计问题的类和相互通信的对象的描述.泛型编程专注于将型别抽象化,形成功能需求方面的一个精细集合,并利用这些需求来实现算法.以一个应用系统的数据采集子系统的系统重构为例,将设计模式应用于系统重构中设计阶段,将泛型技术应用于系统重构实现阶段;讨论设计模式技术和泛型技术的结合对系统重构的作用与意义.     

气象软件设计模式的研究与实现

介绍现有气象软件系统设计模式,分析国内气象业务特点和功能需求,提出一种新的设计模式。给出该模式下的数据转换和质量控制模型、组件封装模型、专业模块插件模型、总体框架模型。阐述在数据存储、组件开发、接口设计中实现技术共享、业务变化和技术更新的方式,解决系统低层和高层间的资源与技术复用问题,实现资源共享、集约化的系统设计。     

气象软件设计模式的研究与实现

介绍现有气象软件系统设计模式,分析国内气象业务特点和功能需求,提出一种新的设计模式。给出该模式下的数据转换和质量控制模型、组件封装模型、专业模块插件模型、总体框架模型。阐述在数据存储、组件开发、接口设计中实现技术共享、业务变化和技术更新的方式,解决系统低层和高层间的资源与技术复用问题,实现资源共享、集约化的系统设计。     

基于PHP的图书管理系统

使用PHP开发的基于B/S模式的图书管理系统,可以使用户界面更加人性化,工作效率更加高效,维护更加便捷.系统采用PHP+MYSQL技术作为开发工具,本文分析了系统的功能需求,给出了开发系统的关键技术,说明了各个模块的主要功能,最终实现了基于PHP的图书管理系统.     

基于.NET的标签打印设计与实现

标签打印功能模块一直是B/S架构下的信息系统开发的难点。通过分析煤样检测管理系统原有标签打印模块的不足,提出一种基于ActiveX插件打印标签的方案,并详细介绍了实现方法和细节。该方案更有效地解决了网页直接打印标签的技术难点,并在煤样检测管理系统中得到了很好的应用。     

业务逻辑可定制的通用学籍管理系统的设计

定制学籍管理系统是根据实际需求量身制作,虽然能够较好满足当前管理需求,但是具有开发成本高、不易扩展、难于维护和重用等不足。针对这些不足,结合实际应用需求,提出了一套业务逻辑可自定制的、系统可重构的通用学籍管理系统设计方案,并从功能模块、业务流程、报表打印、操作界面等4个方面对方案进行了详细说明。利用该方案实现了一套通用成人高校学籍管理系统,在实际运行中,效果良好。     

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.