基于Android的低功耗移动心电监控系统设计与实现

本文针对传统心电监测设备的缺点,设计了一套移动心电信息采集监控系统。该系统通过嵌入内衣穿戴的智能电极对心电信号进行采集处理,并通过目前已成为移动设备标配的蓝牙无线数据网络将心电数据发送至Android监控终端进行存储、管理和分析。并在最后通过链路实现验证了基于Android设备和蓝牙无线数据网络的心电监控系统的可行性和实用性。     

便携家庭式远程定位ECG监测预警系统的设计与实现

针对远程定位ECG监测预警系统的需求,设计了一套家庭式心电实时监测预警系统。系统包括远程监测平台与移动预警端,远程监测平台采用Labview编写了ECG波形显示与回放程序,并利用自主开发的心电采集设备实现了心电分析与监测预警等功能。移动预警端将ECG采集模块与Android手机相结合,实现了ECG信号的实时监控与远程定位等功能。实测结果表明,系统准确率在94%以上,携带方便,在出现心率紊乱等症状时,可及时发送报警信息,帮助患者得到医疗救助。     

基于Android系统的蓝牙便携式血脂仪的设计

蓝牙以其很强的灵活性、操作方便、成本低等优点,在很多领域得到应用.本文介绍了一种采用蓝牙技术的便携式嵌入式血脂仪,该仪器具有蓝牙无线通信功能.数据采集模块使用MSP430作为主控制芯片,增加了蓝牙传输模块,将采集到的数据发送至终端.终端接收模块使用ARM 11为内核的S3C6410芯片,建立了基于Android智能系统的数据接收和分析终端.智能终端利用Android蓝牙的API开发类,对终端蓝牙实现打开蓝牙、搜索附近蓝牙设备等基本操作,再利用Socket连接,实现数据传输.最后利用Eclipse开发工具,完成Android系统的上层应用的开发.     

Android移动学习平台客户端的搭建

移动学习已经越来越成为人们生活中的一个重要的学习手段,基于Android系统的高校校园通作为一种移动学习的工具应运而生.移动端可以实现用户登录、个人应用、学院应用、及其它等功能.利用Android布局技术实现各个模块的页面搭建.     

一种Android平台的便携心音心电实时采集系统

针对传统心电仪及心音听诊设备相互独立且不易携带的缺点,设计并实现了一种基于Android平台的便携式心音心电采集系统。该系统由心音和心电采集及信号调理模块,蓝牙数据通信模块和Android系统上位机构成。首先在心音与心电采集与放大电路中将信号进行分别放大和去噪处理,然后通过模数转换将处理后的信号经由蓝牙模块发出;最后使用Android平台设备上位机程序对采集到的心音与心电信号进行接收与实时显示。实际效果表明,所设计的信号调理电路能够有效滤除外界噪声干扰,可以清楚地分辨信号的诊疗特征,极大程度上克服了现有诊断设备的诸多缺点,为个人健康监护以及医务人员外出诊断都提供了一个良好的解决方案。     

基于GPRS的远程数据采集模块

针对传统的数据采集系统对系统构建的方便性与数据传输的可靠性的要求,提出了一种基于移动GPRS无线通信的远程数据采集方案.该方案利用GPRS的Internet接入功能,通过移动公司的网络来实现数据采集模块与远程主机之间的无线通信.分析了该数据采集模块的原理与结构,嵌入式TCP/IP/PPP协议的实现,以及GPRS模块的驱动设计.并由此研制出一台基于Winbond单片机与GPRS模块的无线数据采集系统,测试结果证明了访采集模块的稳定性与可靠性.     

基于Android的数据采集处理实验系统设计

传统的教学实验系统是采用有线串口与PC之间通信,无法移动设备,针对这种缺点,设计开发了基于An-droid平台的便携式的数据采集处理实验系统.通过分析系统在实验中的需求,提出设计思想以及实现方法.介绍Android平台的采集数据、记录数据、绘制曲线和现实拟合曲线.通过曲线拟合对变量间的关系进行分析,验证和发现规律.测试实验结果表明该实验系统符合实验所需功能.     

基于C8051单片机的无线心电监护系统设计

介绍一款低功耗无线心电监护系统,它由数据采集盒和PC监护终端两部分构成.数据采集盒在C805117320单片机控制下实时采集心电数据,通过NRF24L01无线模块发送给PC监护终端.终端中的C8051F320通过NRF24L01模块接收心电数据.并由自带的USB接口将数据传送给PC机进行心电波形的显示和分析处理.该系统可实现多个病人心电信号的采集、存储和分析等功能,小巧便携、方便实用.     

基于C8051F320单片机的低成本心电监护系统设计

介绍一种基于C8051单片机的动态心电监护系统.该系统由两部分组成:以C8051F320单片机为核心的数据采集装置和以PC机为平台的分析处理系统.硬件电路功耗低,由单片机自带的USB接口将数据传送给PC机.软件平台采用LabVIEW可视化虚拟仪器系统开发平台,将传统仪器的功能模块集成到计算机中,用户可通过修改虚拟仪器的程序改变其功能.采用USB接口实时传输心电数据,并将数据采集模块设计为计算机外设,使该系统高速快捷、小巧便携.     

基于ZigBee技术的远程家电控制系统

为了实现对常用家电设备的统一管理和远程操控,设计了一套基于ZigBee技术的远程家电控制系统。系统以ARM11作为主控平台,采用Android移动终端作为用户的操控平台,利用ZigBee技术将常用家电设备控制模块组建成一个家庭内部无线网络。ARM主控平台运行网关服务器程序,接收来自Android移动终端的访问请求,通过ZigBee技术将该请求信息发送到家庭内部网络来实现对相应家电设备的控制。经测试,通过Android移动终端实现了对室内空调等家电设备的远程控制。     

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.     

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.     

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.     

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