基于语音识别与RFID技术的智慧粮仓系统

针对传统粮仓的监管问题，设计一种基于语音识别与RFID技术的智慧粮仓系统，通过结合ASRM08-B语音模块、RFID技术、无线传感器网络、以太网通信技术实现。该系统由粮情监测、安防系统、智能联动和云平台构成。ZigBee终端节点通过传感器采集粮仓环境数据，通过无线方式传送给ZigBee协调器，并使用以太网作为主干网进行数据传输，最后传输到云平台和手机APP进行数据存储、处理和呈现，此外，可以通过语音模块或者手机APP直接与粮仓中设备联动，为粮仓管理系统设计提供了新思路。     

PoE应用前景无限

作为通过以太网电缆输电的IEEE工业标准,以太网供电（POE）技术的发展势头十分强劲。这一新兴技术通过传输以太网数据的CAT-5电缆进行供电,可以简化用电设备（PD）的安装和部署。这些设备包括无线接入点、监控摄像机和VoIP电话等。     

基于无线传感器网络的核辐射监测系统设计

针对核电站周围环境复杂,人员难以靠近等特点,设计了一套基于无线传感器网络的核辐射监测系统.整套系统由终端节点、路由节点、协调器节点和上位机监控系统四部分组成.节点之间采用Mesh网络拓扑,利用ZigBee技术无线传输测量数据,上位机监控系统通过组态王实时显示数据,系统成功实现了对辐射剂量的自动检测及远程监控.实验表明,该系统具有功耗低、性能稳定、组网灵活、拓展性强等优点.     

基于ZigBee的液位无线监控系统设计

应用ZigBee技术,设计了一种液位无线监控系统.该系统由中心节点和终端节点组成,终端节点借助液位传感器采集液位数据,中心节点接收终端节点传来的液位数据,利用液晶模块实时显示液位数据,液位异常时,语音报警,并自动将预设处理方案向终端节点发送控制命令,处理警情.     

电厂电机设备智能巡检系统的研究

根据建设智能电厂的要求,实现巡检的无纸化、准确化、高效化,文章提出了一种基于无线通信技术与计算机网络技术相结合的设备巡检系统。该系统由移动终端,网路节点以及终端监控平台组成。采用S3C6410A处理器,通过振动传感器和温度传感器采集电机运行数据,通过3G网络将数据传回终端监控平台,监控平台通过分析数据,评估设备运行状态,保证设备的安全运行。     

基于Zigbee技术的监管平台的系统设计与实现

基于无线传感器网络设计一套战地装备智能监控系统,该系统由集成特定传感器的多个监控节点和配套通信及数据处理软件构成。系统结合智能传感器网络技术、无线射频（RFID）技术和有线通信网络技术,可在战地恶劣条件下快速构建一个以无线自组网为终端、以内网为骨干的混合网络。系统通过监控节点协作地感知、采集和处理网络覆盖区域内特定对象的信息,实现重要装备自动注册、关键设备运行状态自动监测、前指驻地周边环境定位、监控和报警等多种功能。     

基于太阳能的温室无线传感器网络监测系统设计

设计提出了基于太阳能的温室无线传感器网络监测系统设计,利用无线收发设备传输数据,无需专门架线,系统结构简单,节省了人力物力,通过监测管理中心可实现对温室温湿度的控制、二氧化碳含量测量、光照度信息采集和图像监控等功能,实现真正意义上的无人值守,与普通无线技术相比,还具有低功耗、低成本和网络容量大等特点.传感器节点采用基于太阳能的能量供给系统无线传感器网络节点结构.该结构采用MSP430超低功耗MCU以及低功耗网络传输芯片nRF24L01,尽可能降低系统能耗.另外,该系统利用多级能量内存,结合能量管理与能量转移技术,使由太阳能电池采集到的能量得到合理的利用,从而构成具有自我管理能力的能量供给系统,实现了为无线节点永久性供电与无线传感网络无限使用的目的.     

无线传感器网络管理平台的设计与实现

传感器节点信息的获取、处理、实时显示,以及无线传感器节点的网络拓扑管理是无线传感器网络应用的关键.本系统采用了基于Zigbee技术的组网方案,进行了系统的网络架构研究,设计了检测系统终端节点的硬件平台和图形化人机交互界面,在此基础上构建无线传感器网络监控平台.该平台能及时显示节点信息以及网络拓扑关系,并能实现信息数据管...     

无线传感器网络数据采集系统设计

无线传感器网络是一种集成计算机技术、通信技术、传感器技术的新型智能监控网络。本文利用组建的无线传感器网络,实现数据的采集和传输。通过集成在节点上的传感器模块,传感器节点采集温度、湿度等数据,并通过ZigBee网络传输把数据送到协调器节点,由协调器节点收集这些数据,通过串口将数据直接发送给上位机并显示,实现数据采集技术。     

基于无人机的区域环境监测物联网系统

介绍一种功能多样、操作简单、拓展性强的无人机区域环境监测系统。该系统综合了ZigBee无线传感器网络、移动网络及无人机飞控以实现对区域温度和湿度的实时监控。将温湿度传感器的终端节点部署在监控区域内,由于协调器只能收集到一定范围内的数据,使用无人机携带协调器的方式对相关区域进行数据采集,终端节点将采集到的信息通过ZigBee网络传输到搭载于无人机上的协调器中,协调器利用移动GPRS网络将收集到的数据发送至服务器端,服务器端进行数据处理,并通过多功能、易操作的客户端实现对该区域环境数据的实时监控。     

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.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

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.     

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.     

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.     

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.     

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.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.