非晶硅微测辐射热计热学和光学分析

通过理论计算得到了桥腿长度和宽度与热导和桥面温升之间的线性关系,辐射功率和桥面温升之间的线性关系,并利用ANSYS软件对线性关系进行模拟验证.根据光学导纳矩阵法,利用MatLab软件模拟微测辐射热计对红外线的吸收率,结果表明微测辐射热计对8～13μm波段红外有很好的吸收率.分析结果为微测辐射热计的研制提供了可靠依据.     

基于CMOS工艺钨微测辐射热计阵列集成芯片的设计与制作

采用0.5μm标准CMOS工艺和微机械加工工艺,设计并制作了低成本4×4钨微测辐射热计阵列集成芯片。阵列中每个钨微测辐射热计均由微悬桥结构和钨热敏电阻组成,CMOS读出电路集成在阵列下方。微悬桥结构由表面牺牲层技术实现,不需要任何的光刻工艺。钨微测辐射热计像元尺寸为100μm×100μm,填充因子为20%。测试结果表明,在真空环境下,钨微测辐射热计等效热导为1.31×10-4W/K,等效热容为1.74×10-7J/K,热时间常数为1.33 ms。当红外光源的斩波频率为10 Hz时,钨微测辐射热计的电压响应率为1.91×103V/W,探测率为1.88×107cm·Hz1/2/W。     

非致冷微测辐射热计绝热桥腿的设计及分析

非致冷微测辐射热计设计的难点之一是起热隔离作用的微桥结构的设计，其中桥腿结构的设计又是重点。文章重点研究了现在流行的几种桥腿的设计，提出了一种新的L形桥腿设计方案，并对其进行了力学和热学方面的有限元分析，为以后在微桥结构设计过程当中桥腿的选取提供了有力的参考依据。     

非制冷红外焦平面高灵敏像元微桥设计

介绍了硅微桥结构的传热物理模型及其理论计算方法。提出一种星膜像元尺寸为360μm×360μm,具有“桌形”绝热框架支撑的微桥结构像元,用有限元分析证明其有较小的热导G,能获得很高的响应率。微桥结构在非制冷红外焦平面（UFPA）单元探测器中起着力学支撑、热隔离和电连接的作用,其品质优劣直接影响着UFPA器件的成像性能。     

微测辐射热计微桥结构性能分析

微测辐射热计的设计难点是起支撑作用的微桥结构的设计.重点研究了现在流行的几种微桥结构,对其性能参数进行分析比较,提出了多层结构的优点.并使用有限元分析软件对不同微桥进行结构分析,以比较其稳固性.     

微测辐射热计的噪声分析

以电阻型微测辐射热计作为基本模型,分析其在电压偏置下的噪声特性.针对微测辐射热计中的约翰逊噪声、1/f噪声与辐射噪声,着重探讨了微测辐射热计的偏置电压、电阻、噪声带宽等参数对其噪声和信噪比的影响,并根据分析仿真结果,提出了三种增加微测辐射热计信噪比的方法.     

斜入射条件下微测辐射热计的光学特性研究

针对典型的微测辐射热计单元结构的设计,依据光学导纳矩阵方法,用Matlab软件分析了多层薄膜的光学特性,获得了理论上红外吸收率最大时吸收层的厚度0.1μm和空腔的高度2μm,通过理论计算得到了斜入射条件下红外吸收率随入射角的变化规律,与常规的计算方法——垂直入射条件下得到的红外吸收率相比,它更接近于实际情况,仿真计算结果更加准确。结果表明:器件在8~14μm波段有80%以上的红外吸收率,并且当微桥形变很小时,器件依然有很高的红外吸收率。     

氧化钒热敏薄膜非致冷红外探测器的等效模型

建立了氧化钒热敏薄膜微测辐射热计的PSPICE模型,结合一个具体的CMOS读出电路给出探测器的等效电路模型,分析了探测器的电学和噪声特性,根据等效模型基于微测辐射热计电阻RD和读出电路MOS沟道宽度2个设计参数对噪声等效温差(NETD)进行了优化,优化数据表明:参数RD取值为2~11 kΩ,W取值为0.1~1.0μm时,得到的NETD值为0.133 4~0.188 5 K。     

MEMS微探针及其在嗅粘膜神经递质检测中的研究

采用微探针电极阵列对大鼠嗅粘膜神经递质进行了在体检测.基于MEMS技术,制备了具有8通道电极阵列的微探针芯片.每一电极的传感器表面为16μm×120μm或0.3 μm×120 μm尺寸.采用循环伏安法,该探针可以检测到50 nM浓度的多巴胺.将探针固定于大鼠鼻腔嗅粘膜,对多巴胺等单胺类神经递质进行了在体检测.通过二氧化碳诱导的三叉神经刺激动物模型的研究,证明微探针适合于神经递质的多位点实时测量.     

MEMS中Ni-W合金薄膜力学性能的研究

研究了柠檬酸胺-1-羟基乙烷二膦酸（HEDP）镀液体系中Ni-W的力学性能。通过紫外曝光的光刻、电铸和注塑（UV—LIGA）技术制备出微拉伸试样和单轴微拉伸测试系统进行拉伸试验。结果表明：在Ni-W薄膜试样尺寸为5μm×50μm×100μm条件下,其杨氏模量约为100．4GPa,抗拉强度为1．96GPa,应变约为3．6％。     

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。     

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.     

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.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.