基于嵌入式技术的车位错时管理系统

针对停车场车位利用率低下、车位管理及车位分配不灵活等问题,提出了一种基于嵌入式技术的停车场车位管理系统的实现方案。该方案基于嵌入式平台并结合GPRS短信收发及Zig Bee的无线物联网等技术实现了停车场车位信息采集、传输、调度及管理自动化功能。实验表明,设计系统可实现车辆出入车库不停车识别、车位停车信息全自动实时采集、错时调配闲置车位等功能,满足车位管理智能化的需求。     

基于CAN总线的智能停车场通信系统

智能停车场是解决我国大中城市停车问题的有效手段。对停车设施进行合理地规划,对车辆停放进行有效地管理,提高城市交通系统的效率,是立体停车场迫切解决的问题。智能停车场管理系统采用先进技术和高度自动化的机电设备,将机械、电子计算机和自控设备以及智能IC卡技术有机地结合起来,通过电脑管理可实现车辆出入管理、自动存储数据等功能,实现脱机运行并提供一种高效管理。文中介绍了智能停车场控制系统组成及功能,给出了基于CAN（控制器局域网）总线智能停车场通信系统的设计与实现方案。该方案可以实现停车场车位管理动态智能化,所有车位状态都可实时监控,最大程度发挥集中调度和管理优势。     

基于射频通信技术的停车库智能管理系统

随着生活水平的提高以及安全防范意识的增强,人们对于停车管理的安全性和泊车的便利性都产生了新的需求。科技的不断发展使得车库的管理也趋于智能化,本文主要介绍了一种全新的停车库智能管理系统,其技术核心为射频通信技术,在进出车辆上需要安装相应的技术模块,在技术支持下,实现对不同车辆信息的辨别和迅速的读取。车库出入口的装置能够对车辆的信息和相应票据进行实时监控,保证车辆可以高效地完成进出。在总线和太网结构的支持下,车库信息能够实现共享,这就使得车库的管理效率大幅度提升。这一系统经过了实践的检验,运行稳定,在未来会得到大面积使用和推广。     

基于深度学习技术的停车场收费管理系统设计与实现�

停车场收费管理系统使用Python语言编写实现,能够解决进出停车场的车辆的收费管理问题。停车场管理人员通过前端界面不仅可以实时观测进入停车场的每一辆车的车型、车品牌、车牌号等信息,还可实时调用储存在后端数据库的停车场内部已停的所有车辆信息,观测停车场内已停车辆的计费情况。利用从网络资源获取的数万张车牌图片,对车牌识别的神经网络进行训练。通过测试,其车牌识别效果与管理模式均取得了良好的效果,为类似于停车场的应用情景提供了一种新的管理系统。     

嵌入式车库管理系统

为利用非接触式IC卡解决传统的车库管理问题,本文提出了通过在嵌入式系统之上建立web服务器和移植SQLite数据库的思路,并以计算机网络方式去对车库管理系统进行管理的系统设计方案。该系统经过测试达到了预定目标,实现了车辆进、出车能够自动识别和信息存储、进入车库的车辆能够引导到空位等功能。其结果对车库的智能化管理具有一定实际的参考价值。     

智能停车场控制技术研究

由于停车场的规模大、结构复杂及其不确定的停车过程,管理和控制好一个停车场还是有很大的挑战性。随着科学技术的不断发展,很多新兴技术开始慢慢地运用到我们的生活中,如无线射频识别(RFID)技术,可通过计算机网络获得实时信息。文章介绍了将RFID技术应用于停车场车辆信息识别。这项应用把RFID技术和实时决策结合成为一个整体,确保车辆准确和高效地停入停车场。     

基于嵌入式的智能停车管理系统

文中对中小型停车管理系统进行了设计,采用射频识别、传感器检测和数据库管理技术,主要实现了车位自动引导和分时段自动收费功能。本停车管理系统运用无线传感技术准确监测车辆进出入停车场并计算好停车时间,利用语音和液晶显示屏提示车位数量等各种停车信息,利用指示灯将车辆引导到指定位置,在业主驶出停车场时系统将计算停出车费用,运用无线射频技术记录车辆出入停车场信息实现自动收费。软件和硬件的结合让停车的整个过程实现自动化与智能化,方便业主停车和停车场的管理。     

大、中型地下车库智能寻车系统

为了提高停车场的服务水平,停车场智能管理系统是必不可少的。它已经在大部分停车场发挥着重要作用,在为人们停车带来方便的同时也具有良好的社会效益和经济效益。在大、中型地下车库中,车主返回停车场时,由于停车场太大或者地形不熟,车主容易找不到车,故提出了智能反向寻车系统。该系统可以帮助车主尽快找到车辆停放的区域,提高车主的满意度,同时加快停车场的车辆周转,提高使用率和收入。目前市场上虽已有一些寻车引导系统,但都是通过监控查找车辆的区域位置,是通过终端主机进行查询的,不够方便快捷。建立一套智能化高速有效的智能反向寻车系统,使停车服务做到安全、简便、准确,并且使造价和经营成本控制在适当范围,是当前停车场管理的趋势。     

嵌入式多PLC下的DP网络停车场监控模型设计

伴随时代和社会的不断发展,国内平均每20户拥有一台私人车辆,而停车场更是成为公共场所和小区的必备设施。本文采用嵌入式结合多PLC完成DP网络停车场监控模型设计,上位机选取组态监控体系,完成车库数据获取,显示以及车位配置,下位机则选取嵌入式多PLC的DP网络构成,能够结合声音数据实现车库照明的智能化控制。具有较高的现实应用意义。     

基于ZigBee的智能停车场管理系统

传统智能停车场的管理系统存在一些不足,为了将其自动化和智能化的程度提高,提出了一种基于Zig Bee组网技术的管理系统。传感器模块电路采用CC2530,具有功耗低、灵敏度高的特点,满足无线收发信息和检测的功能。该系统通过后台的管理系统,可以及时管理停车场的车位状态,图像处理能够采集车牌的有效信息,指示灯控制电路引导车辆,实现停车场智能管理的目的。     

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