基于ZigBee的可穿戴式跌倒监护系统

提出了一个可以进行远程报警的无线跌倒监控系统。跌倒检测是通过佩戴在人体的终端设备获取人体运动时产生的加速度信号,然后通过跌倒算法对数据进行处理识别。终端识别跌倒信号后,通过ZigBee无线网络将信号传输到网关,网关通过发送AT指令到SIM300模块来发送报警短信到监护人手机上。实验结果表明,系统可以100%检测到人体跌倒,使医护人员及家属在5s内收到跌倒报警信息。     

基于ZigBee的可穿戴式跌倒监护系统

提出了一个可以进行远程报警的无线跌倒监控系统.跌倒检测是通过佩戴在人体的终端设备获取人体运动时产生的加速度信号,然后通过跌倒算法对数据进行处理识别.终端识别跌倒信号后,通过ZigBee无线网络将信号传输到网关,网关通过发送AT指令到SIM300模块来发送报警短信到监护人手机上.实验结果表明,系统可以100％检测到人体跌倒,使医护人员及家属在5s内收到跌倒报警信息.     

智能家居中老人跌倒远程监护系统的设计与实现

经过对人体跌倒中所经历的状态的分析,设计了一种基于检测加速度变化来判断跌倒的远程跌倒报警仪。这种跌倒检测报警仪的工作原理是通过对佩戴人发生跌倒时身体姿态的变化所引起的传感器的三个轴上的加速度的变化来监测人体是否跌倒。当检测到人体跌倒后,跌倒检测报警仪自身发出声光报警信号,并自动将跌倒报警的信息通过GPRS以短信或拨打对方电话的方式通知监护人员,同时通过IEEE 802.15.4E无线的方式将报警信息发到智能家居的远程监控网页进行远程报警提示和报警信息的存储。     

智能家居中老人跌倒远程监护系统的设计

经过对人体跌倒中所经历状态的分析,设计了一种基于检测加速度变化来判断跌倒的远程跌倒报警仪。这种跌倒检测报警仪的工作原理是通过对佩戴人发生跌倒时身体姿态的变化所引起的传感器3个轴上的加速度变化来监测人体是否跌倒。当检测到人体跌倒后,跌倒检测报警仪自身发出声光报警信号,并自动将跌倒报警的信息通过GPRS以短信或拨打电话的方式通知监护人员,同时通过IEEE 802.15.4e无线的方式将报警信息发到智能家居的远程监控网页,进行远程报警提示和报警信息的存储。     

基于GPRS的远程安防监控系统的研究和设计

设计一种以$3C2410为硬件平台和嵌入式Linux为软件平台,基于M35GPRS模块的远程安防监控系统,整个系统围绕图像的采集,传输和显示进行了探讨,阐述了远程安防监控系统中的软硬件处理技术。测试结果表明,该远程安防监控系统具有监控温度,实时传输视频流,通过网页远程控制监控机动作,短信服务和报警等功能。与已有系统相比,该系统把Web服务器和CGI应用到监控机和网页的交互,真正实现了对监控端的远程控制。     

一种基于单片机的移动目标监控系统研究

针对目前大部分监控系统对移动目标物的监控要求越来越高,设计了一款基于单片机的嵌入式移动目标监控系统。系统以目前功能强大的AT89S52单片机为核心,采用适合人体视觉特性的Itti模型来处理拍摄到的视频图像。从视频图像颜色特征图与亮度特征图两方面来对采集到的图像进行检测与分割构成图像显著图,根据移动目标物质心的变化来跟踪图像。仿真表明,该系统能有效监控与锁定目标物,具有较强的自适应性。     

智能安防管理系统的设计与实现

运用TCP/IP的通信技术、嵌入式系统、视频编解码、GSM远程通信技术等设计并实现了集安防终端主机监控报警、安防探头监控、远程监控报警等功能一体的一种智能安防管理系统,给出了系统组成框图及其实现方案。经过实际应用检测,该系统性能可靠、易于使用,有效地实现了快速报警、处警,远程监控功能,提高了安全防护水平,具有广泛的实用价值。     

基于OpenCV的老人跌倒检测的设计和实现

当今社会空巢老人的数量逐渐增多,老人跌倒发生率也相应增加,这已成为一个严重的社会问题。基于计算机视觉的老人跌倒检测的研究具有重要意义,文中提出了一种全新的老人跌倒检测方案。首先利用背景差分法提取监控视频中的运动目标图像轮廓,然后提取运动目标的特征信息。没有使用传统的直方图和椭圆形来表示人体轮廓,而是把直方图分为三个区域,分别计算出三个区域的重心,然后根据这三点的信息提取出运动目标的特征,根据特征信息的变化来检测是否发生跌倒。实验结果表明,该方案在保证较高准确率的前提下,计算复杂度大幅度下降,能达到较好的识别效果。     

基于ARM的嵌入式智能视频监控系统设计

针对传统PC远程监控系统的一些不足,提出了一种前端具有预处理功能的嵌入式智能视频监控系统设计方案,通过测试,该系统视频目标检测精度较高,能够满足实时监控及智能检测需求,实现了预期设计要求。     

基于OpenPose改进的老人摔倒检测算法

为避免老人摔倒后未能及时提供医疗援助而造成的人身伤害,研究发现老人摔倒并及时发出警告,可减少老人摔倒的损失和严重后果。为了提高老人摔倒检测算法的检测精度和实时性能,提出了一种基于OpenPose改进的老人摔倒检测算法。该算法在OpenPose人体骨架信息识别网络的基础上,提出将其部分卷积层替换为深度可分离卷积神经网络类型。该算法使用长短期记忆神经网络来检测老人的摔倒。从URFall公共数据集提取跌倒和相关行为数据,丰富自制数据集,实验结果表明,本文改进后算法大大提升了系统判别摔倒的识别精度。     

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