化学助剂作用下银纳米线生长机制与尺寸控制的研究进展

介绍了液相法制备银纳米线(AgNW)过程中常用的阳离子型控制剂、阴离子型控制剂和分子型控制剂三类化学控制剂对银纳米线尺寸的影响;阐述了不同种类化学控制剂的作用机理,总结了化学控制剂作用下银纳米线的形成机制,分别是:多孪晶颗粒单轴生长机制、溶解平衡机制、定向附着机制以及自组装机制;对液相法制备银纳米线过程中常用的高分子包覆剂的种类及作用机制进行了归纳;最后结合实际问题,分别指出化学控制剂与包覆剂在制备银纳米线时的优点与不足。     

一种嵌入式流媒体播放器VCR控制的设计与实现

提出一种嵌入式流媒体播放器VCR控制的设计和实现方案,主要对控制文件的生成方法、系统工作原理、网络传输机制、QoS控制机制进行介绍.     

一种用于ATM网的UPC模糊逻辑监控机制

在ＡＴＭ网络中，用户参数控制（ＵＰＣ）确保信源业务流遵守呼叫接纳控制中达成的协约。根据监察机制的要求，对漏桶机制跳跃式窗口机制、指数加权滑动平均机制以及本提出的一种模糊逻辑监控机制进行了分析和仿真，结果表明模糊逻辑监控机制在选择性和动态性上优于其它几种控制机制。     

一种嵌入式流媒体播放器VCR控制的设计与实现

提出一种嵌入式流媒体播放器VCR控制的设计和实现方案 ,主要对控制文件的生成方法、系统工作原理、网络传输机制、QoS控制机制进行介绍     

建立和实施一体化管理体系的方法(下)

(上接2003年第4期第57页)4 一体化管理体系的运行控制一个组织的体系建立标志是：文件编制完成并经正式批准发布。体系运行的过程就是执行文件，按文件要求去组织实施，即“做所写”的过程。体系运行的有效性是持续改进并不断追求卓越的基础和前提，保持体系有效性的手段是实施运行控制。其主要方式可分为内部控制机制和外部控制机制，内部控制机制主要有：过程监测、内部审核、管理评审;外部控制机制主要有：相关方(或第二方)依据法规或合同对组织进行的监督检查和审核、认证机构进行的第三方审核。下面对内部控制机制中的过程监测、内审、…     

无线网络接纳控制算法研究

介绍了接纳控制算法在无线资源管理中的控制机制,同时说明了接纳机制的作用、组成以及分类,最后分析了传统无线网络中的几种接纳控制机制的优缺点和应用环境。     

综合业务接入网关引入资源动态分配机制

文章提出综合业务接入网关在现有流量控制前提下,引入资源动态分配的机制,优化综合业务接入网关关流量控制机制,包括综合业务接入网关现网中发现的问题、现有流量控制机制,以及资源动态分配机制和实现流程等内容。基于资源动态分配机制,可以更有效地使用综合业务接入网关的资源,促进网络资源的合理利用,提升业务收入。     

TCP的发展与改进

TCP是因特网上最通用的传输层协议之一，其核心是拥塞控制机制。文中在介绍TCP基本机制的基础上。对TCP拥塞控制的改进机制进行了讨论，这些改进包括：避免不必要的重传超时、撤销不必要的拥塞控制、显式拥塞通知和数据损伤通知等。     

基于网络控制的分层多点播送速率控制机制研究

本文在视频分层编码及分层传输协议的基础上，将基于网络控制与接收端控制机制相结合，提出一种新的分层多点播送速率控制机制。文中给出了该机制的拥塞检测、流行度权衡和数据层增加和丢弃算法。实验结果表明，该速率控制机制通史对拥塞做也快速响应，并在较好利用宽带的基础上保证高流行度的会话流具有较好的服务质量。     

ASON控制平面生存性研究

自动交换光网络ASON的生存性机制是其核心和最重要的内容之一.目前对于ASON传送平面生存性机制研究较多,而对于控制平面的生存性机制研究较少.文章首先分析了ASON基本结构及其生存性策略,然后从控制平面与传送平面关系着手,深入研究了ASON控制平面的生存性机制,提出了一种逻辑独立的控制平面生存性机制解决方案.     

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.     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.