高精度微波引导设备角度数据检测系统设计与实现

针对当前某高精度微波引导设备的角度制导性能精准检测难度大的问题,基于ARM+DSP+FPGA的总体架构,研究并搭建了高精度角度数据检测系统的硬件电路结构,基于C/C++、VHDL和Verilog开发了角度数据测试软硬件程序,实现了对微波引导设备空间角度、数据信号的接收、处理、解算和测量;并进行试验验证,结果表明该系统实现了设计功能、达到了指标要求,对高精度微波引导设备角度测量方位角优于0.16°,仰角优于0.18°,数据字与设备预置信息一致,满足高精度角度、数据的检测要求,对有效提高该微波引导设备的可靠性具有重要意义。     

基于PSD的微小角度动态测量研究

提出了一种新的测量系统对微小角度进行高精度的实时测量,并给出了系统的测量原理和设计。测量系统将位置敏感探测器(PSD)与计算机测量控制相结合,用光学的方法实现了在较高精度下对微小角度的动态测量,在±2 0’角度变化范围内可以达到0 .1’精度,可以广泛的应用在小角度的高速高精度测量中。     

基于MEMS传感器的脊柱形态检测系统设计

鉴于传统的脊柱检测普遍具有放射性,设计出基于MEMS传感器的无放射性脊柱形态检测系统。检测系统使用MEMS姿态传感器测量被测人背部脊柱姿态角度,由微处理器STM32进行数据读取、分析、处理后,在显示模块上显示检测结果,并将检测结果发送到上位机。检测系统可以分析被测人脊柱的Cobb角和轴向躯干旋转角度ATR,判断被测人脊柱是否畸形。     

提高超限治理系统检测精度的研究与应用

随着高速公路管理部门对车辆运输超限治理工作深入细致的开展,对超限检测的技术要求更加严格,现有治超系统的测量精度方面的不足日益凸显。本设计在硬件上使用两台德国SICK公司的LMS系列激光传感器消除现有设计中单台传感器测量盲区,实现对车辆宽度和高度进行全角度的动态检测,并在软件方面利用自适应神经网络算法处理传感器的测量数据,从而得出了动态车辆的较精确测量结果。本设计有效克服了现有超限检测系统存在的部分不足,这具有一定的实用价值、推广价值。     

汽车方向盘角度传感器检测系统设计

作为汽车动力学稳定性控制系统的重要组成部分,汽车转向角传感器可以用来检测方向盘的转动角度,而方向盘的转动角度是为汽车实现转向幅度提供依据,使汽车按照驾驶员的转向意图行驶,其精度对于行车安全具有重要意义;设计了一种汽车方向盘角度传感器转角检测系统,并利用该系统检测一款角度传感器转角值测量精度;检测系统通过CAN总线驱动角度传感器转动并读回角度传感器的转角数据,再利用Matlab对数据进行分析处理;经过多次实验,实验结果符合要求,证明了该系统能有效解决汽车方向盘角度传感器转角测试问题。     

基于互补滤波算法的移动机器人姿态检测

移动机器人的姿态检测能够反映出机体相对于路面的实时姿态,有利于机器人对行进过程中的当前姿态做出相应的控制.针对移动机器人姿态检测的要求,采用MEMS陀螺仪和加速度计对移动机器人在移动过程中相对于路面的姿态倾角进行测量并通过互补滤波算法对其测量的角度进行解算.互补滤波算法将加速度计静态特性和陀螺仪动态特性有效融合到一起,并对互补滤波算法进行了微分处理,提高了系统的动态特性,计算量小,从而实现对机器人行进过程的路面起伏状况进行实时测量.     

基于偏磁薄膜矫正的直流光学电流传感器设计

针对高压输电中直流的检测,提出一种基于偏磁薄膜矫正的直流光学电流传感器.偏磁薄膜固定磁场在石榴石材料中的方向提高了传感器测量精度,采用偏振计直接检测偏振角的方法消除了偏振面预偏角度误差对测量系统的影响.对传感器实现直流检测进行理论分析,设计了传感器的光路结构,并使用传感器进行直流检测实验.结果表明：该传感器能兼顾灵敏度和测量范围的需要且测量输出线性度高,线性拟合度为0.999 53,多次测量重复性好,误差小于0.4％.     

薄壁筒形件旋压制造外径尺寸在线检测系统

为提高薄壁筒形件旋压制造尺寸精度,针对当前旋压制造无外径尺寸在线检测的现状,设计了一种基于位移传感器和角度编码器组合测量的在线检测系统.通过建立直角坐标系,将采集的位移和角度信号换算得到筒形件轮廓坐标,根据坐标拟合圆,得到外径尺寸.完成了系统软件设计和硬件系统搭建,并进行了实验验证,结果表明:系统测量分辨率小于0.05μm,检测精度可达2μm,且重复性良好,是一种筒形件外径尺寸在线检测的可行方案.     

一种人体步态轨迹测量方法

为研究人体的步态运动规律,采用基于拉线传感器检测系统和人体关节角度测量装置,对人在不同路况下行走时踝关节运动轨迹和下肢关节角度进行了测量,根据人体下肢刚体模型和数据融合方法对测量结果进行了分析和处理,得到了人在上楼梯、平地行走和下楼梯时的步态轨迹和3种路况下的支撑相;上楼梯时的支撑相最大,平地行走次之,下楼梯最小.测量结果为了解人体运动规律和康复治疗提供了依据.     

基于霍尔器件的非接触式角度传感器研制

霍尔元件是一种对磁场敏感的传感器件,具有防烟尘干扰、抗振动和成本相对低廉等优点;利用线性霍尔元件作为检测,采用微机细分方式,设计了一种可从0°到大于360°范围内角度进行非接触测量的系统,给出了角度测量的原理、电路的构成及设计方法,实验表明,该系统测量精度达到设计要求,可广泛应用于工程测量领域.     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。