探析基于位置服务的SNS网站新发展

SNS网站通过博客、视频和图片分享等方式聚合并扩展用户的社交网络,满足用户的社交需求。本文以Foursquare为例分析了基于位置服务的移动SNS的特点和成功因素,对国内移动SNS产业链结构和未来发展做出初步判断。     

社交应用:SNS与微博成为应用枢纽

包括社交网络和微博在内的SNS应用已经成为广大网民不可或缺的日常网络应用之一,移动社交应用更成为移动互联网上的主要数据来源之一。在中国,SNS已经占据互联网浏览量的一半之多,并呈现出向移动网络迁移的增长态势。SNS具备实时社交功能,大幅刺激了移动网络数据使用量的增长,使得电信运营     

移动互联网对用户流失的影响分析——以人人网为例

移动互联网的发展给传统互联网带来了巨大的冲击,导致了互联网商业模式的转变,同时也造成了大量传统互联网用户的流失。本文以典型的社交网络服务人人网为例,分析移动互联网对其所带来的用户流失,移动SNS是否吸引了新的用户资源,从用户的角度探究移动社交网络的发展趋势。     

SNS,运营商能分到一杯什么羹?

关注：移动社交网络 3G时代的到来和手机高速上网的实现,为移动社交网络带来了无限商机。凭借多年来积累的庞大用户资源,国内通信运营商也纷纷涉足SNS（社交网络）领域,中国移动的139.com和mspaces.net社区、中国电信的ChinaQ、中国联通的“新乐园”,给原本就热闹的SNS市场又加了一把火。     

SNS社交网络发展现状及趋势

2008年最热门的互联网业务不是网络视频,也不是盈利能力最强的网络游戏,而是SNS社交网络。本文将从SNS社交网络业务在我国的发展现状分析入手。总结了我国SNS社交网络业务的发展特点。并重点分析了未来SNS社交网络业务的发展趋势。     

上兵伐谋:139社区的定位与运营要走差异化之路

谁将成为未来移动互联网时代的产业领先者?答案或许要看谁能控制移动互联网的用户入口.基于六度分隔理论和社会性网络的SNS社交网站在移动互联网用户入口中占据极重要地位,无疑,139社区将成为中国移动移动互联网战略的关键棋子.与国内其他SNS社交网站不同,139社区必须走一条差异化之路,才能在移动互联网的未来争夺战中获胜.     

彩印SNS的用户亲密度算法

在彩印业务SNS用户亲密度模型中,用户的亲密度计算是核心问题。社交网络的核心价值就是再现用户现实人际关系,如今多种多样的社交网络服务中对于用户关系的展现大都是粗粒度的。本文以六度分割理论为理论基础,结合彩印业务的特点,对SNS用户关系建模分析,进行用户间的距离量化计算,展现SNS用户的亲密度,从而提高社交网络服务的业务扩展性,实现SNS用户价值。     

SNS转型利器:话题与活动社交

近期,Facebook、Twitter等纷纷加快变革步伐。其中,面对各类移动互联网应用对于SNS因素的强调,以单一SNS功能见长的社交网站似乎面临着转型之困。欲解决上述问题,不妨从用户的SNS需求谈起。其实,网民或都具备"喜新厌旧"的特质。一方面,网民希望通过SNS来维系现有稳固的核心社交圈子,另一方面则期望通过SNS服务不停延展自身的社交规模和社交圈子,这就要求SNS网站提供能力,让用户有机     

SNS网站与搜索引擎融合的可能性和策略探讨

凭借社交游戏驱动的SNS网站用户数量增长难以持续,开发平台成为SNS网站提升用户黏性的主要手段。在现有的SNS网站开发平台上,引入搜索引擎能避免用户因游戏娱乐软件使用过多而产生厌倦的问题,更能强化现实的社交网络。文章分析了SNS网站融合搜索引擎的可能性,总结了SNS积极引入搜索引擎的策略,以增加用户黏性,赚取巨大用户流量。     

中国电信SNS构想——百事群平台

本文论述了SNS的发展现状和商业模式,并针对中国电信的特点,阐明建设电信运营商自己的SNS的必要性,并提出了发挥中国电信通信能力优势的SNS社交网络应用平台技术方案,包括开放的功能架构和高可用性的系统架构.     

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