ECP系统列车总线电源设计

根据ECP系统列车总线电源的设计需求,选择推挽正激和单端反激两种DC／DC电路拓扑作为列车总线电源的电路拓扑,并设计了列车总线电源的控制程序,最后进行了地面联调试验。试验结果表明设计的列车总线电源满足ECP系统的工作要求。     

基于LabVlEW的直通制动机地面联调试验平台研究

为满足直通式制动机地面联调试验需求,利用数据采集卡与MVB网络通信技术,基于LabVIEW开发了直通式制动系统试验平台,完成了速度与制动距离模型的建立及TMS系统功能的模拟,测试验证了系统试验平台的实用性.     

基于LabVIEW的直通制动机地面联调试验平台研究

为满足直通式制动机地面联调试验需求,利用数据采集卡与MVB网络通信技术,基于Lab VIEW开发了直通式制动系统试验平台,完成了速度与制动距离模型的建立及TMS系统功能的模拟,测试验证了系统试验平台的实用性。     

航天地面应用系统联调测试平台设计

由于航天地面应用系统是分工协作开发的大型系统,接口复杂多样,在系统集成与联试时往往花费较多的人力物力。因此提出了一种辅助航天地面应用系统进行系统集成联试的工具一联调测试平台。首先针对联调测试平台设计中需要解决的问题给出了解决方法。然后阐述了联调测试平台的功能特点和体系构架及其所使用的关键技术,并给出了软件的设计实现。     

基于数据流的仿真系统联调方法研究

在大型作战仿真系统的联调测试过程中,采取何种联调测试方案,将直接关系到系统集成的成败.数据流是驱动仿真运行的重要原动力,通过对数据流本质的分析,针对作战仿真系统的联调测试需求,提出了一套基于数据流的联调测试思想,定制了系统联调的规则和数据互通的评判等级,通过联调方法的实际应用,完成了一个大型仿真的系统联调工作.     

无人机动态测试、仿真与训练系统设计

无人机动态测试、仿真与训练系统包括地勤检测平台、联调仿真环境和虚拟训练环境,能够对无人机进行动态测试和控制,满足日常操作训练要求.地勤检测平台使用了便捷式测试仪,在满足无人机地勤检测需要的同时,能够方便地勤准备,缩短准备时间;联调仿真环境利用分布式交互仿真技术和虚拟现实技术,构建虚拟无人机,通过遥测和遥控设备完成无人机各部件的动态测试和综合演练,同步生成三维视景,方便地面分析和控制;在联调仿真环境的基础上,虚拟训练环境对精密设备,大型设备以及电磁设备进行虚拟化处理,方便日常操作训练.     

虚实结合的地面无人装备体系试验平台研究北大核心

地面无人武器装备是未来陆战场无人作战的骨干装备,承载着引领陆战武器装备发展转型和战斗力生成模式转变的重要任务。装备试验是把好装备质量和作战适用性的重要关口,针对地面无人武器试验需求,详细设计了虚实结合的地面无人装备试验平台原型系统,主要包括中间件子系统、在线资源管理子系统、想定编辑子系统、导调控制子系统、虚拟战场仿真子系统,给出了虚实结合的地面无人装备试验平台原型系统部署方式,以及支撑地面无人武器装备体系运用的综合试验典型应用模式,从而为开展地面无人装备体系试验提供了技术支撑。     

某型直升机半物理仿真视景系统设计

仿真视景系统能将所采集到的数字式自动驾驶仪系统信号全面显示,并且模拟发送自动驾驶仪半物理仿真系统所需信号.视景系统集成了基于硬件采集的数据收发系统,并且通过软件实现数据接收、存储与发送.在地面半物理仿真中进行联调试验,研究探讨了该系统的技术要点,给出了系统硬件、软件设计,并对所存数据进行分析.结果表明该系统具备工程应用要求,真实的反映直升机半物理仿真试验过程.     

银行外联应用系统仿真平台的设计与实现

银行中间业务是银行面向各类外联机构开设的业务,近年发展迅速。随着业务品种的不断创新和大量外联应用系统的接入,中间业务联调测试环境的可用性问题随之而来。其中,外联机构联调测试环境不稳定或缺失、高并发场景下系统资源受限、实时联调测试诉求响应慢的问题尤为突出。针对当前使用状况及不足,提出一种银行外联应用系统仿真平台的解决方案。该平台通过抽象业务逻辑、整合业务数据对各外联应用系统的交易行为进行了仿真,并通过分层设计和集群部署实现了在行方测试环境完成中间业务的联调测试目标,有效规避了外联方联调测试环境所固有的风险,全方位保障了中间业务联调测试的有效性、实时性和完备性。     

仪控系统联调试验平台的研制

仪控系统是实现核电、火电、化工等领域过程控制和运行管理的重要系统,其由诸多具有不同功能和性能的设备构成,结构复杂而有必要开展成套仪控系统联调试验,本文介绍了仪控系统一般结构及其对试验系统的设计要求,采用基于VME板卡和图形化人机界面技术,研制了具有四层结构联调试验平台,给出联调试验平台的结构、组成以及工作原理.     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。