EPON技术在HFC网络双向改造中的优势

通过对HFC网络的分析，对EPON技术的探讨，提出了HFC网络双向改造中采用EPON技术的优势。     

EPON与HFC网络的融合及网络接入方式的探讨

介绍了淮南有线电视网络的实际状况，概述了HFC网和EPON网的网络结构。对两者进行简单对比，并着重介绍了EPON网络的优点，肯定了EPON技术在双向网络改造中的应用。提出EPON＋LAN和EPON＋EOC种接入方式。介绍在使用EPON技术进行网络改造初期时，如何将HFC网络同EPON网络进行融合，采用新技术的同时使原有网络设备仍可发挥作用。通过新老技术的结合，达到了拓展有线网络发展途径的目的。     

EPON接入技术促进城乡HFC网络的发展

介绍了EPON接入技术,认为EPON接入技术是广电理想的接入模式。介绍了城乡HFC网络中应用EPON技术的设计思路,指出采用FTTx的EPON LAN方案实现有线宽带综合信息网络,这使得HFC网络更加稳定,带宽足够大,EPON接入技术必将促进城乡HFC网络上新的台阶。     

双向HFC网络采用EPON技术的探讨

本文简单介绍了EPON的技术特点,结合EPON技术的HFC双向光网络的关键技术、双向HFC采用EPON的改造方案：EPON＋LAN改造方案和EPON＋无源EOC方案广电运营商在网络建设和综合业务规划时．研究如何利用双向HFC网络光缆的共缆多纤条件,增加专门的数据业务通道而采用EPON的方案是有意义的讨论“光进铜退”环境条件下的双向HFC网络举例说明了EPON在接入网领域的广泛应用潜能．     

地级市有线电视网络双向改造的构想

本文介绍了目前地级市有线电视网络状况,PON技术网络结构,分析了HFC网络与EPON网络的共同点与差异,阐述了HFC网络应用EPON技术进行网络双向改造的方法构想.     

EPON技术及其在HFC网络中的应用探讨

EPON是目前实现FTTH的主流技术。本文通过对EPON标准及相关技术的介绍,探讨了如何结合EPON技术规划和改造HFC网络,以满足各类增值业务对HFC网络带宽和交互性的发展需求。     

EPON技术在有线电视网络宽带接入中的应用

在分析目前国内有线电视网络宽带接入技术的基础上，介绍了EPON（以太网无源光网络）技术。根据有线电视HFC网络结构，探讨了EPON技术在有线电视网络宽带接入中应用的可能性，并且提出了在有线电视宽带网络中应用EPON技术的思路。     

EPON技术在铜山有线HFC网络改造中的应用

EPON作为一种最具发展潜办的接入技术,正在掀起新一代宽带接入网的一场革命。它与传统HFC网络的结合,能够很好地解决有线电视网络的多业务承载问题。在介绍EPON技术的基础上,就EPON技术在铜山有线电视HFC网络改造中的应用进行分析。     

EPON技术在有线电视网双向改造中的应用

介绍EPON技术在新建和改建有线电视双向网络中的几种具体应用，在新建小区采用EPON技术组网与HFC网同步建设，在已建小区HFC网改造的同时应用EPON技术组网，并给出具体的设计方案和投资预算，并与CMTS＋CM技术组网进行了投资和性能的比较，说明在广播电视网EPON技术中应用的优越性。     

EPON技术及其对有线传输网络的重大影响

阐述EPON技术的系统组成、关键技术、传输原理、QoS保证、技术优势和特点，说明EPON无源光网络与HFC网在拓扑结构等方面是天生匹配的，EPON技术将对有线电视传输网络产生重大影响，是有线传输网络下一步的发展方向。     

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.     

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