机载光电探测仿真系统的研究

光电探测系统仿真是近年来世界各国重点发展和研究的一种应用仿真技术.文中介绍了基于1553B总线和以太网的一种机载光电探测仿真系统的设计与实现.详细讨论了机载光电探测仿真系统的功能、组成、设计特点并给出了具体的硬件和仿真软件的实现方法.该机载光电探测仿真系统可模拟光电探测系统在各种工作方式下的工作.将该系统应用于综合航电火控仿真系统试验,验证了综合航电火控系统的可行性与正确性,并已经在光电探测系统的设计和研制过程中取得了良好的效果.     

光电探测器环境温度PID控制的实现

环境温度对光电系统中的光电探测器的性能有着重要的影响，为了使光电系统达到最佳的性能须对其环境温度进行有效的控制；在实验的基础上建立了光电系统中光电探测器的工作环境温度的数学模型，根据此数学模型设计了PID控制算法对其环境温度进行控制，对设计的PID控制算法进行了MATLAB仿真，并在工控机上用组太王软件实现对光电系统中探测器的工作环境温度的PID控制，结果表明设计的PID控制算法完全满足光电系统中光电探测器对环境温度的要求。     

基于单PC机的光电瞄具模拟训练系统设计与实现

光电瞄具是配备于某武器系统上的一种简易火控系统。光电瞄具模拟训练器是为解决光电瞄具的使用操作而设计的。文中首先介绍了光电瞄具的工作原理，然后给出了一种针对光电瞄具系统的光电瞄具模拟训练器的设计原理。具体的介绍了模拟训练器的硬件组成，给出了主机系统软件的设计流程，最后分析了影响系统性能的因素。该系统的设计方案对于开发类似仿真系统具有一定的参考价值。     

CCD在焦距测量中的应用

以线阵ＣＣＤ光电传感器作为接收器，能够自动测量和实时显示透镜的焦距。介绍测量系统的工作原理、软硬件设计与测量误差。关键词     

基于PCI总线的离散I/O接口板设计

介绍了一种基于PCI总线扩展功能的离散I/O接口系统的软硬件设计与实现方案。设计中,选择PCI 9052作为PCI总线接口芯片,利用CPLD作为板卡主控芯片实现地址译码和逻辑控制等功能,光耦和继电器分别作为输入输出隔离器件。该系统实现了控制采集24路光电耦合器输入信号和24路继电器输出信号的功能。应用表明,本接口板工作稳定,满足航电设备的输入输出要求。     

基于ATmega64的荧光信号采集系统

设计了一种基于AVR单片机,应用于检测海水中多种有机污染物的荧光信号采集系统。该系统利用ATmega64作为信号采集系统主控制板的核心芯片,采用日本滨松光电倍增管H5783进行光电转换,使用ATmega8作为光信号处理板的处理器。实现对海水中多种有机污染物的现场、实时、连续检测。实验证明,系统运行稳定可靠,达到了设计目标要求。     

基于RTX的实时伺服控制系统

伺服机构作为光电系统点源目标模拟器的部件,为点源的目标大小、辐射强度、运动轨迹提供精确控制.为提高目标模拟器动态响应和系统的实时性,提出了基于RTX的实时伺服控制系统解决方案.分析了控制系统的工作原理和硬件结构,设计了主控软件的MFC进程和RTSS进程,阐述了RTSS进程的组成和各层次的功能划分,研究了主控软件的工作流程及系统的关键技术和设计方法.实验结果表明该系统具备较高的控制精度、动态地响应性能和实时性,满足了点源目标模拟器的实时性需求.     

基于DSP的车载雷达测速系统设计

针对运行中火车测速,运用多普勒效应,采用DSP设计雷达测速系统,并阐述了其基本设计思想与工作原理.给出系统硬件、软件设计结构和原理图,改善了原有光电测速精度,提高了系统工作稳定性和可靠性,经实验证明DSP采集板工作稳定,测速效果好.     

太阳光自动跟踪装置的研发

设计制作一种以三菱FX2N-48可编程控制器作为控制核心,以维纶触摸屏作为界面控制的全天候太阳光自动跟踪装置.介绍了太阳光自动跟踪装置的总体设计方案、结构特点、工作过程及节能应用前景,建立了太阳光坐标模型,设计了系统的机械传动机构;阐述了控制系统的有关检测控制方式,给出了系统硬件的光电检测电路、PLC控制电路、键盘与显...     

基于PSD的空间信标光位置检测系统的研究

通过采用FPGA作为主控制器,以PSD为位置敏感探测器,设计了一种空间信标角度检测系统,实现了空间信标光位置的实时测量。通过实验数据验证,本系统具有较高的测量精度和实时性,灵敏度高,系统位置分辨率优于5μm,等效视场角10°,最小分辨率0.005°,可广泛应用于光电跟踪系统或光电位置检测领域。详细介绍了系统的软硬件设计和实现方法,给出了多路同步数模转换过程的FPGA逻辑时序,进行了各接口模块的设计和状态跳跃图分析,为信标光角度测量领域设计提供了一种可行的实现方法。     

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.     

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.     

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。