基于LM3S1138的OLED寿命检测仪

设计并实现了一种OLED寿命检测仪。该检测仪以LM3S1138微控制器为核心,包括数控电压输出电路、数控恒流源电路和光强测量电路,并增加了环境温度补偿功能,以提高检测的准确性。该检测仪可以同时对8路OLED器件进行自动测量、显示并保存检测结果。     

工业在线气体检测仪的设计与实现

针对传统气体检测仪器测量精度低、稳定性差以及可测组分单一等问题,设计出一种用于工业气体分析的多通道在线检测仪。所谓的多通道,即可采用多种类型传感器,通过不同的搭配测量不同的气体成分。系统部分选用工业级芯片STM32F407作为检测仪信号分析和处理的核心,以新型数字式红外传感器S-Module作为主要的检测手段;此外,还通过智能化的手段,实现检测仪测量、记录一体化。通过测试,该气体检测仪具有稳定性好、测量精度高、抗干扰能力强的特点,可满足工业现场气体浓度检测的基本需求。     

基于89S51的TiO2氧敏传感器测量电路

针对TiO2氧敏传感器的高阻特性以及对该传感器阻值测量精度的要求,适应当今测量智能化、自动化的需要,设计了该外围电路.该电路采用单片机控制12位A/D转换器进行数据采集和自动换挡,同时采用线性化电路进行误差补偿,六位数码管清晰显示.经济实用、测量精度高,显示清晰.     

基于PLC的飞机电气附件综合检测仪的研制

设计了基于PLC的飞机电气附件综合检测仪,飞机电气附件的基本测量元件是继电器、开关、按钮、自动保护开关.根据继电器的工作原理,设计了吸合/断开电压、吸合时间和接触电阻的检测方案,介绍了系统的硬件结构设计和软件流程.系统以PLC为核心,用触摸屏控制和显示检测过程,并具有存储和打印功能.该检测仪稳定可靠,精度高,具有很好的...     

基于ATMEGA16的便携式瓦斯检测仪

针对目前常用瓦斯检测仪检测范围高时精度低,检测精度高时检测范围低等不足,设计了一种基于双检测回路的便携式瓦斯检测仪。该系统以ATMEGA16控制器为核心,利用催化燃烧式传感器和红外探测器组成双回路瓦斯检测电路,并将朗伯-比尔红外吸收定律运用到瓦斯检测原理中,提高了低瓦斯浓度时的测量精度,同时扩大了瓦斯浓度的测量范围。系统的无线收发模块可以和上位机通信实现信息共享,其开关机电路可以实现关机后仪器与电源完全断开,有效节约电池能量。实验表明该瓦斯浓度检测仪具有检测精度高,检测范围广,高效节能等特点,具有较高的应用价值。     

基于stm32的手持式气体检测仪

在日常生活及工作中,为了对有害气体进行有效的实时监测,避免长期处于有害气体的环境中从而对人员健康产生危害,针对目前国产气体检测仪最小检测浓度过高、响应时间过长、检测误差较大的问题设计了一种基于STM32的手持式气体检测仪;主要从内部硬件设计以及软件设计两个方面完成了手持式气体检测仪的设计,硬件方面的主控芯片选择STM32F103芯片,软件方面基于嵌入式系统开发实现对于VOC气体、温度、大气压力的测量、显示、数据存储以及数据分析,主要利用C语言来实现其功能;通过对整个检测仪系统的调试,证明这一系统能够对100ppb以下气体浓度进行响应、响应时间能够小于20s、检测误差能够小于5%FS;本气体检测仪除了普通环境的气体浓度监测,还能应用在有气体泄漏或空气质量要求的化学、工业、农业、动植物培育等场景。     

基于单片机AT89S52的超声波测距系统的设计

介绍了基于AT89S52单片机为主控件的超声波测距仪的工作原理、硬件和软件的设计。硬件主要由超声波发射、接收检测电路和显示电路组成。该系统测量精度高．能够清晰地显示测量结果,可应用于汽车倒车雷达、建筑施工工地以及一些工业现场的位置监控,也可用于如液位、井深、管道长度的测量等场合。     

一种便携式室内空气质量快速检测仪设计

设计一种涉及室内甲醛（ HCHO）、氨（ NH3）和苯（ C6 H6）三种有害气体浓度的便携式快速检测仪。该仪器采用新型电化学传感器与基于FPGA的新型高精度信号处理电路得到对应气体的初始浓度值,并结合室内环境气压和温湿度实时监测情况,修正初始浓度值,对浓度超标气体进行声光报警。该仪器具有检测速度快、精度高和携带方便等优点,为大众家庭实时快速检测室内空气质量提供一种简单可靠的方法与手段。     

红外CH_4检测仪的设计

设计了一种应用红外吸收光谱原理的红外CH4气体检测仪。该检测仪用红外热释电传感器作为敏感元件,以C8051F040单片机作为智能控制单元,实现了CH4体积分数的准确测量。介绍了气室的结构设计、微弱信号的放大和数据采集的设计。通过实验数据分析,该气体检测仪具有测量精度高、稳定性好、低功耗等优点,满足了实际情况的需要。     

不锈钢晶间腐蚀检测仪的研制

根据EPR法设计研制了不锈钢晶间腐蚀检测仪。硬件共分为CPU模块、ADDA模块、键盘 -显示模块以及恒电位电路四大模块 ,各模块通过系统总线交换信息。检测仪的软件采用C5 1语言和汇编语言混合编写。所研制的检测仪性能稳定、操作简便 ,适合于不锈钢晶间腐蚀倾向的快速、定量的无损检测 ,一次测量可得到ir、Qr、Qr/Qa 和ir/ia 等多种数据     

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.