逃逸链梯性能测试台的研制

本文介绍一种用于逃逸链梯性能检验的测试台,本测试台可将逃逸链梯在水平方向安装,采用传感器来检测逃逸链梯阻力油泵的压强,链条所承受的拉力,链条的传动速度三种特征数据,用单片机将数据采集处理之后通过RS-232C传送到PC机内进行储存.对采集到的数据进行分析,可以得出逃逸链梯的性能是否达到要求.     

基于射频技术的加速度传感器性能测试台设计

介绍了一种基于2.4G射频芯片nRF2401的加速度传感器性能测试台的实现方法，详细介绍了加速度传感器性能的测试原理和加速度传感器性能测试台的实现方法。在该系统中，采用PIC单片机PIC16F877A对加速度传感器的输出信号进行采集后通过射频芯片nRF2401将其传入工控机中，同时采用NI LabVIEW对采集的数据进行分析。射频技术解决了数据采集中旋转部分与静止部分的接线困难问题，使数据能正确快速地采集。     

基于PLC的涡轮增压器试验台计算机测控系统研究

介绍了一种基于数字显示仪表和计算机组态软件的发动机涡轮增压器性能测试系统,通过电气系统控制液压气动系统,实现了系测试台统的功能。通过对试验结果的分析表明:测试台工作正常,实验数据合理。该测试台对涡轮增压器的研制和开发有着重要作用。     

电梯群控待梯人群识别技术研究

电梯群控系统中,候梯人群数量很难获得,降低了群控系统的控制性能。为了进一步完善群控系统的性能,提出一种待梯人群识别技术。此技术采用热释电红外传感器组实现对候梯人群数量进行模糊采集,并在微处理器上进行数据处理,再由CAN总线将信号传输到电梯群控系统主机。对待梯人群数量的采集、预处理及数据的传输,进行了软件及硬件设计,并进行了相关实验。此项研究将为电梯群优化调度系统提供重要的参数和依据。     

基于单片机的链梯降速控制系统的设计

提出一种高层建筑遇险无动力循环链梯逃生装置.链梯的速度控制是该装置的关键,本文设计一种基于单片机的智能控制器控制链梯匀速下降.     

云边协同物联网中区块链技术的应用研究

为解决物联网终端设备集中接入性能低、安全隐患多、数据易丢失和易篡改、价值数据分享困难、数据孤岛普遍存在等问题,提出了一种基于区块链的物联网云边协同架构。将区块链和数字签名技术应用到网关组成的边缘层,在边缘层实现终端设备的分布式接入认证,通过将数字签名密文等信息存储到私有链来提高认证的可信性和安全性。将区块链和基于公证人的跨链机制应用到云端层,提高价值数据在机构内和机构间进行共享的可靠性和安全性。模拟实验结果表明,所提出的基于区块链的物联网云边协同架构对原有系统影响较小,易安装部署,可以承受DDoS等常见攻击方式,在云端进行的跨链价值数据共享的方式具有较强的实用性、适应性和可行性。     

一种新型矿用高压保护器综合测试台设计

设计了一种新型矿用高压保护器综合测试台,介绍了该测试台的总体结构及软、硬件设计方案。该测试台以S7-300系列PLC为控制器,可以产生短路、过流、欠压、过压、零序过压、零序过流等故障信号,并将故障信息、试验项目及相关硬件运行状态显示在上位机监控界面上,从而快速检测高压保护器的性能。以ZBT-11高压保护器电流保护功能测试为例进行了测试台功能检测,结果表明该测试台能够快速、准确地检测出高压保护器故障。实际应用验证了该测试台效果良好。     

区块链技术下的数据处理平台设计与实现

为了解决现有数据分析系统中数据服务业务中心化、数据链条断裂、数据篡改等问题,提出了一种基于区块链技术解决数据处理方案,即基于区块链技术的数据集成与分析平台。该数据处理平台充分利用区块链技术的去中心化、不可篡改等固有特性,借助区块链技术架构设计出数据处理平台的总体架构以及相关管理模块,同时借助智能合约、共识机制等手段对数据快速处理,在保证数据安全可靠的情况下对数据高效的集成与分析,从而解决数据分析链条断裂、数据被篡改等数据安全问题。该数据处理平台可为政府业务制定数据安全政策、推动数据化产业发展提供理论依据和决策参考。     

基于端口模式的CY7C68013固件程序设计

本文介绍了基于USB单片机的弹载测量系统地面测试台的固件程序设计方法。地面测试台用来对弹载数据记录装置进行自检,在本测试台上采用EZ-USBFX2系列单片机CY7C68013来实现上位机与地面测试台间的通信,固件程序的功能包括产生测试台状态信号、下载各种信号源数据及进行实时监测数据回读。文中通过测试台的工程实例,详细介绍了端口模式下固件程序的编写流程,并给出了部分程序代码。     

基于FPGA实现PID控制器的研究

介绍了一种基于FPGA的用数字电路实现的PID控制器。把原来用单片机实现的数字PID控制算法单独用数字电路来实现,保留单片机对参数整定的灵活性。在设计中研究了PID算法的数字电路实现。由于把PID控制从单片机中隔离出来,因此可以降低在工控场合强烈的干扰造成单片机程序跑飞对整个系统的影响,提高了控制的可靠性。最后介绍了本设计在逃逸链梯中的应用。     

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。