基于分布式处理技术的物联网数据库研究和设计

针对物联网中的数据库管理问题,通过对物联网技术的研究,结合分布式处理技术、P2P(对等网)点云计算技术,提出了一个基于分布式处理技术的物联网数据库设计方法。在此以医疗系统物联网为例,验证了该方法在一定程度上能够解决物联网中的数据库管理问题,从而为物联网技术与数据库技术、网络技术、中间件技术等的技术结合提供了技术支撑。     

一种物联网教学实验系统的设计与实现

本文介绍了物联网的技术原理和应用方向,设计并实现了一种物联网教学实验系统。本系统基于无线传感器网络和射频识别技术,实现了物联网在物流、家居和医护等方面的典型应用案例。该实验系统有助于实验者深入学习物联网基本技术,并理解物联网在各种典型应用行业中的功能和系统设计方法。     

基于物联网的现代仓储智能系统的设计及应用

为实现仓储智能系统在物联网下的高效运行,文章基于物联网技术及智能仓储的有关概念,从射频识别系统、定位系统和监控系统等多个系统模块着手,详细探讨了基于物联网的现代仓储智能系统的设计方法,实现了现代仓储智能系统的设计,预计该系统的应用将显著提高仓储物流行业的工作效率和质量。     

基于物联网技术的智能家居实训教学平台的设计

针对目前高职院校物联网相关专业对实验实训设备的迫切需求,设计并实现了一种基于物联网技术的智能家居实训教学平台,从平台的设计架构、硬件设计及软件设计上阐述了该平台的具体设计思路。实践证明,该实训平台易用灵活,对物联网专业学生的创新能力培养起到了极好的推动作用,极高地提升了学生的综合技能。     

《物联网应用综合设计》课程建设的研究与实践

介绍了《物联网应用综合设计》课程在物联网工程专业人才培养体系中的的地位的作用,根据人才培养的总体目标,提出了课程建设的目标与思路。以智能家居系统为例,较详细地介绍包含了感知层、网络层和应用层这个三层架构的物联网综合应用系统的设计方法及安装调试技术。经实践,该课程取得了较好的教学效果。     

基于物联网的智能数据采集和监控系统设计

通过对基于物联网的智能数据采集和监控系统的架构设计以及核心设计理念的论述,探讨一种构建高效能、强扩展、易实施的物联网智能数据采集和监控系统的方法。研究结果表明,采用该思想设计的物联网智能数据采集和监控系统可以帮助监控管理人员管控大量的无人值守智能终端设备,提高工作效率和安全性。     

基于LoRa的物联网低功耗广域系统设计

在传统物联网的基础上,提出低功耗广域LoRa的解决方案。设计一套由采集层、终端层和应用层组成的物联网架构并设计系统原型,介绍架构的硬件设计和软件设计,实现了物联网低功耗广域接入技术。最后通过其实例应用,展示LoRa的应用前景。该系统充分发挥了LoRa技术在高性能、远距离、低功耗,支持大规模组网、测距和定位等方面突出的优点,对未来物联网系统的设计、开发、部署和运营具有一定意义。     

参数联合优化的物联网安全分析与研究

为了提高军事物资供应链物联网的安全性能,提高网络入侵的防御能力,提出一种基于网络入侵信息特征参量的联合优化估计的物联网安全检测模型。首先构建军事物资供应链物联网的节点部署结构模型,分析物联网入侵特征参量,提取物联网入侵特征参数,采用波动和频率参量联合优化方法设计物联网安全构架的参数安全检测模型,实现物联网入侵的安全检测模型构架。仿真测试结果表明,该方法进行军事物资供应链物联网安全构架,对网络入侵信息的准确检测性能较好,抗干扰能力较强,确保了物联网安全。     

卫星物联网系统随机接入前导序列设计

针对卫星物联网系统波束内传输时延较大和波束覆盖范围广的特点,对随机接入设计方案进行了讨论,同时分析了影响GEO卫星系统随机接入前导序列设计的因素,提出了卫星物联网系统的随机接入前导序列设计方法,并对所设计参数的TOA估计误差进行仿真评估与研究。仿真结果表明,该方法适用于卫星物联网系统,可基本满足大往返时延差下正常的随机接入过程。     

基于物联网技术的智能婴儿摇篮系统开发

本文设计了基于物联网技术的智能婴儿摇篮系统。该设计将无线局域网、婴儿摇篮、传感器及微信小程序融合在一起,基于物联网技术、阿里云物联网平台及微信小程序完成该系统的开发。系统下层采集节点通过传感器模块采集相关数据,并利用MQTT协议接入阿里云物联网平台,再转发至微信小程序;上层微信小程序应用层,从阿里云物联网平台获取数据,并将用户指令通过阿里云物联网平台转发至下层硬件模块。本系统填补了当下市场中智能婴儿摇篮的技术空缺,该系统除了可应用在婴儿摇篮上,还可根据用户需求进行二次开发,安装在其它场景中,具有一定的实际应用价值。     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks