基于ZigBee网络的智能家居红外遥控系统设计

为了将现有红外遥控家电与智能家居系统无缝结合,设计提出了一种基于Zig Bee网络智能家居万能红外遥控系统。设计的万能红外遥控节点,通过自适应方式学习、存储和重构多种红外编码信号,并利用Zig Bee网络控制各屋的万能红外遥控节点,实现利用智能终端对家居内已有电器的整体无缝连接及远程控制。     

基于ZigBee的移动物联网温度采集系统设计与实现

为了实时准确获取特定环境下的温度值,设计并实现了一种温度采集系统。系统基于Zig Bee技术,采集平台利用自带Zig Bee协调器获取Zig Bee终端节点温度值,通过4G移动网络上传至远程服务器My SQL数据库;同时提供Android客户端APK供手机用户查看温度,以及搭建B/S架构网站供PC用户访问,实现了温度数据采集并多方式呈现。     

基于S3C6410的智能家居远程监控系统的设计与实现

智能家居系统是利用嵌入式技术和无线传感器技术实现对家用电器的远程监控。随着物联网技术的快速发展,人们对高效、舒适、安逸的生活方式的渴望与日俱增。相关传感器的标准化和模块化极大推进了智能家居的实现进程。该文以S3C6410为主控单元的核心处理器,使用Zig Bee无线通信模块实现Zig Bee终端与各个功能模块之间的相互通信,通过嵌入式操作系统将各个部分有机结合在一起,实现对家用电器的远程监控。     

基于物联网的设施农业监控系统研究

文章主要论述基于物联网的设施农业监控系统,将设施农业中的传感器连接到Zig Bee网络中,检测设施农业温度、湿度二氧化碳浓度、光照的即时数据,通过手机APP与无线网络构成的系统完成对设施农业环境的监测与控制。将物联网技术和Zig Bee技术组合,组建无线传感器网络,通过Zig Bee节点采集环境信息,并通过无线网络对环境进行监测以及Android技术实现实时监控。     

基于ZigBee的智能家居系统设计

随着经济的快速发展和人民生活水平的不断提高,人们对家居生活提出了更高的要求,计算机网络技术的发展使得智能家居逐渐变成了现实,基于Zig Bee的智能家居系统以其成本低、质量优、方便快捷的优点备受人们的关注,成为智能家居系统的研究重点。本文基于此从Zig Bee技术的特点以及基于Zig Bee技术的智能家居系统的技术结构两个方面对Zig Bee技术进行了分析,并在此基础上着重探讨了基于ZigBee的智能家居系统设计。     

基于ZigBee无线网络的室内温度监测系统

针对传统温度监测系统需要布线,可扩展性差等缺点,该文设计了一种利用Zig Bee无线网络实现的室内温度监测系统。系统以ARM9为主控平台,采用Zig Bee技术组建了一个室内无线传感网络。网络终端节点负责实时采集室内监测区域的温度数据,并通过网络协调器将温度数据发送给系统的网关服务器。用户可以通过Web浏览器访问网关服务器来实时查看室内温度数据。经测试,系统运行稳定,实现了预期功能,具有一定的应用价值。     

基于ARM的智能家居控制系统设计

针对传统智能家居采用有线组建布线繁琐,增减设备需要重新布线,影响美观,且系统中的家电需要依靠家庭内部的PC,升级和维护均不方便。在此将Zig Bee无线通信技术及嵌入式ARM技术结合在一起,利用Qt技术通过触摸屏进行人机交互,设计了一种既能利用PC机又能利用手持终端对家居进行控制的智能家居控制系统。以现有嵌入式ARM微处理器的开发和控制水平,开展基于Zig Bee的网点部署的研究,以无线网实施家居电器的控制和管理。测试表明,该系统具有良好的实用性、可靠性和可扩展性。     

无线传感器网络组网设计

无线传感器网络是一种集成了计算机技术、通信技术、传感器技术的新型智能监控网络。本文分析了Zig Bee无线传感器网络的结构,并研究了采用Zig Bee技术如何建立无线传感器网络,及实现终端节点和协调节点的通信。     

基于ZigBee技术的无线压力传感器的设计

设计一种基于Zig Bee无线通信技术的压力传感器的方案。该系统主要包括压力传感器节点、路由器节点和数据接收节点构成,节点之间利用Zig Bee技术实现无线通信。将采集到的压力数据模拟值利用A/D芯片转换成数字值,然后采用Zig Bee无线通信技术传送到数据接收节点,实现无线压力传感器的设计。该设计具备抗干扰性强、时延短、操作方便等特点,有较广阔的应用前景。     

基于Arduino的XBee与Yeelink结合的温湿度监控网络的搭建

以Arduino为开发平台,借助XBee模块完成Zig Bee局域网组网,利用Yeelink互联网开放平台搭建了一个远程温湿度监控系统。系统以Arduino UNO为控制板,在局域网内利用XBee模块无线传输温湿度传感器所采集的数据,以W5100以太网模块作为Zig Bee无线网络网关,实现数据从Zig Bee网络向互联网传输。该系统可以实现对温度、湿度等数据的实时采集;通过互联网访问Yeelink可以获取信息,进行在线监测;在数据监测出现异常情况时通过Yeelink向终端发出报警信息,使终端蜂鸣器发出声响,从而提醒周围人,达到报警效果,实现系统的远程实时监控。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.