探地雷达数据实时成像和预处理系统设计

探地雷达作为目前分辨率、效率最高的地下目标探测设备之一在城建、交通、地质、考古、国防等部门得到越来越广泛的应用。将雷达主机采集到的大量数据高速地传输到PC机上实时地显示,并对数据进行预处理以消除部分干扰,得到更准确、清晰的地质图像,对雷达系统而言是非常必要的。论文即介绍了作者自行设计和实现的探地雷达高速传输数据的实时显示并使用克希霍夫偏移算法进行数据预处理的软件系统,给出了该系统的工作原理和实现方法。     

新一代多普勒天气雷达三维数字化拼图系统研究*

我国正在进行新一代多普勒天气雷达的建设工作,组网雷达三维数据拼图对提高灾害性天气的监测和预警能力、改善临近预报、深化雷达资料应用具有重要意义。研发了基于新一代多普勒天气雷达原始数据的三维组网数字化拼图软件系统,介绍了软件系统的体系结构与实现等内容。     

一种车载终端软件架构及实现

车载终端是车联网系统的重要组成部分, 为了提高终端软件的可靠性和开发效率, 参考NGTP(Next Generation Telematics Pattern), 设计了一个开放式的车载终端软件架构. 在该架构中, 系统由移动终端、后台支撑系统、车载终端及后台业务系统组成, 各部分之间通过标准数据协议进行数据交换, 实现车辆远程数据采集和诊断、紧急情况处理、远程查询及控制等车联网典型应用. 为了提高终端软件系统的可靠性, 将终端软件分解成功能系统与守护系统两部分, 通过守护系统实时监控功能系统, 当功能系统出现故障时, 重新启动功能系统来保证终端软件系统的有效性. 根据该架构开发的车载终端验证了方案的有效性.     

基于DSP的并行软件系统的设计与实现

随着超大规模集成电路技术的发展,数字信号处理器的处理能力不断提高.介绍系统软件运行的硬件平台及功能,描述系统硬件的软件接口技术及其实现方法,设计并实现了一个基于VME总线技术.采用Link口互联的DSP 21160N并行软件系统,对系统性能进行测试与分析,结果表明,该并行软件系统能够满足设计要求.最后对系统的研究和实际工作做出总结.     

天气雷达智能断电保护系统设计与实现

针对天气雷达工作过程中发生的异常断电现象,设计了一套智能断电保护系统。该系统基于多种网络通信协议,实时采集雷达状态和UPS电源信息进行分析,一旦雷达供电发生异常,能够及时触发智能断电保护机制,实现雷达安全关机,避免发生硬件损坏状况。实验结果表明,对天气雷达工作过程中突发的断电情况,系统能够实现预期保护功能,对延长雷达使用寿命、实现雷达无人值守具有重要意义。     

可与iFIX一体化集成的EMS高级应用软件系统的设计与应用

高级应用软件的开发和维护是构建钢铁能源管控系统(EMS)的重点内容,为提高其功能模型的开发、组态、调试和维护效率,设计开发了一种基于图形化组态的高级应用软件系统,可兼容iFIX等工控行业常用的监控软件平台。介绍了该软件系统的系统结构特点、算法及实现方法。工程应用表明,该软件系统能与iFIX监控软件实现一体化集成,开发周期短、系统开放性好、运行稳定,易于组态、调试和维护。     

多普勒天气雷达二次产品处理系统的设计

多普勒天气雷达是目前检测中小尺度灾害性天气最有效、最先进的手段之一.为了满足业务和科研对雷达资料处理的需求,将科研成果转化为业务应用,提高观测资料的处理能力,本文基于模块化编程和动态模块嵌入等技术设计和实现了雷达二次产品处理系统.该系统集原始数据处理、反演和绘图显示功能于一体,兼容多种数据格式,产品丰富,并支持模块定制,具有良好的兼容性和较强的扩展能力;在界面设计上,充分考虑到用户的多元化,方便各级用户的操作使用,界面友好.     

相控阵探地雷达信号处理软件系统的设计

相控阵探地雷达信号处理软件系统使用多种算法对雷达信号进行处理和分析,并以图形界面显示最终结果.整个软件功能复杂,需要群体合作开发才能完成.为了协调各个开发人员之间的工作,采用了面向对象的设计方法,即提出了将信号处理问题抽象成一个滤波器类并在其派生类中实现具体的各种信号处理算法,建立一个数据池专门用于数据存储以及数据通信等概念,使得本软件便于群体协作开发,且具有较好的可扩展性、可维护性和可移植性.     

新一代多普勒雷达临近预报软件系统

详细介绍了基于我国业务布网的新一代多普勒天气雷达资料的临近预报系统的结构、组成,C++和Fortran的混合编程缩短了软件研发周期,功能库／组件技术的使用提高了软件系统的重用性,可定制的参数文件丰富了软件的功能和适用范围。     

海洋石油工程环境条件数据管理与统计分析系统

介绍了一个海洋环境数据资料管理和统计分析软件系统,该系统是针对海洋石油勘探开发对海洋环境条件的要求专门开发的。文中详细介绍了该系统的设计思想和主要实现技术,包括海洋环境条件数据的组织和管理体系、数据统计与分析方法、系统的功能及实现手段。该系统的设计与开发对提高海洋石油环境要素调查与观测资料的管理水平和促进海洋环境数据的应用都有着积极的意义。     

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.