基于C的湿度传感器校准平台设计

针对大量湿度传感器出厂或使用前需要定标或进行误差补偿的技术需求,基于C语言和SQL数据库技术,构建了一种采用传感器融合算法的大批量湿度传感器数据自校准平台;首先通过饱和盐溶液构建标准湿度环境,然后通过MT4080D数字电桥对待校准湿度传感器进行多次测量,之后把测量值矩阵和标准值导入基于最小二乘和加权融合算法的平台进行处理,得到不同固定点湿度环境下传感器标定和补偿的校准数据;该设计实现了操作简单,成本低廉,响应时间短,运算速度快的湿度传感器的软件校准算法平台,具有一定实际应用价值.     

气体传感器校准装置设计

为提高气体传感器现场校准的稳定性和准确度,降低环境条件改变对测量值的准确度和稳定性的影响,简化校准程序降低管理成本,设计了一种基于网络的远程校准装置,该装置可以为气体测量仪器执行计量确认时提供可靠的标准量值。首先,校准装置获取传感器现场的温度和湿度,通过TCP/IP网络将传感器测得的气体浓度和温度以及湿度传送至中央控制服务器,由特定的校准算法计算出传感器的温度和湿度修正值。然后,用修正后的测量值对传感器进行计量确认。实验表明,经设计的校准系统校准的气体传感器与传统的校准方式校准的传感器相比测量值的稳定性和准确度更优,其误差由5.3%LEL提高到0.3%LEL标准偏差由传统校准方法校准后的1.1%LEL提高到0.6%LEL。     

基于CC2530的无线传感器网络监控平台

设计了一种基于ZigBee的低复杂度、低功耗和低成本的无线传感器网络环境监控平台,该平台可动态显示网络拓扑结构。主要由ZigBee无线传感器网络、通信网关和ARM控制台三部分构成。以ARM9作为控制台环境,ZigBee芯片CC2530为核心搭建无线网络,挂载温/湿度传感器、振动传感器及压力传感器等构成完整的环境监测平台。测试结果表明,设计的系统运行稳定,数据采集准确,网络健硕,具有可扩展性。     

基于QCM的湿度传感器等效电路模型研究

基于石英晶体微天平(QCM)的湿度传感器是一种以石英晶体为核心元件的新型高灵敏度传感器.根据气相中晶体振荡电路的起振和稳定条件,对晶体表面敏感薄膜吸附水分时等效电路参数的变化进行建模,得到了一种新型的基于QCM的湿度传感器等效电路模型.通过电路仿真软件PSPICE对模型进行仿真,并搭建QCM湿度传感器实验测量平台,结果验证了基于QCM的湿度传感器等效电路模型的有效性和正确性,对QCM湿度传感器的振荡电路的进一步设计和优化具有指导意义.     

HIH-4000、HIH-4010系列湿度传感器

该系列湿度传感器是专为大量生产的原始设备制造厂（OEM）用户而设计的。利用这种传感器的线性电压输出可直接输入到控制器或其他装置。一般仅需200μA电流,HIH-4000／HIH-4010系列湿度传感器就能理想地用于低引出、电池供电系统。传感器良好的互换性减少或消除了OEM的生产校验成本。可提供单个传感器校准数据。     

一种新型温湿度检测的无线网络系统设计

介绍了一种新型无线温湿度检测仪的设计方法与工作原理.该仪表采用全校准数字式温、湿度传感器SHT11作为温、湿度参数采集器,使用无线收发模块SmartNode N608W构建温、湿度检测网络,实时显示和发送当前温、湿度信息.该无线温湿度检测仪操作简单无线温湿度、易于安装,在工农业生产上起到十分重要的作用.     

基于四余度设计的驾驶员操纵传感器校准方法

飞行控制系统中,驾驶员操纵传感器作为飞机人工操作的信号源,具有非常重要的作用.目前,驾驶员操纵传感器LVDT采用检定的方式完成计量,忽略了该类传感器的使用要求.以驾驶员传感器技术要求为基础,分析四余度LVDT传感器技术指标特点,提出对其中通道跟踪误差和通道干扰的校准需求和校准方法,并通过Matlab实现通道跟踪误差计算.该方法的建立能够为传感器基于应用需求的校准方案设计提供思路,在今后具有复杂应用环境、特殊应用要求传感器的校准设计中打下基础.     

基于LCP衬底的柔性湿度传感器研究

介绍了一种新型柔性电容式湿度传感器.该柔性电容式湿度传感器采用液晶高分子聚合物(LCP)作为衬底,金属铜(Cu)作为叉指电极,聚酰亚胺(PI)作为湿度传感器的湿敏介质.LCP衬底的应用使得该传感器具有良好的柔性和可弯曲性.该柔性湿度传感器与传统硅基湿度传感器相比较具有成本低廉、结构简单、制作方便等优点.该柔性湿度传感器在25℃下的平均灵敏度为0.04%pF/%RH,最大回滞为±4.16%RH,其平均灵敏度在25℃~70℃范围内受温度影响较小.在25℃下其响应时间和恢复时间分别为36 s和39 s.该柔性湿度传感器可以应用于环境湿度检测、人工电子皮肤系统和可穿戴设备等领域.     

多孔硅相对湿度传感器的设计

基于对三明治型与平铺型两种多孔硅湿度传感器结构的灵敏度分析与比较,结合两种结构的优点,设计出新的传感器的结构。通过对该结构湿度传感器的性能测试,得出该传感器的灵敏度为1.1 pF/RH%,响应时间为73 s,温度湿度系数为0.5%RH/℃,该湿度传感器适用于在中低湿环境中测量,在每隔20 d的时间对传感器跟踪测试,证明该传感具有较好的稳定性。此外为了传感器可以自解吸附,该传感器采用多晶硅为传感器加热除湿,在金属电极上溅射一层钝化层以防止电极被水汽腐蚀。     

HygroCliD2系列探头

HygroClip2系列探头是基于AirChip3000技术，以其独有的高精度在湿度测量方面独树一帜。综合了领先的传感器和集成电路技术，HygroClip2系列产品以高精度、高性能和高可靠性（〈0．8％RH／0．1k）代表了世界上最先进的技术，将湿度测量技术引领到一个新的高度。支持湿度、露点和温度测量，具有卓越的测量精度和重复性。内置数据提取和校准历史存储功能，     

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。