面向宽带网络的通用信息侦听模型

探讨了面向宽带网络的通用信息侦听模型．在该模型中，利用可扩展集群系统的并行计算机能力处理宽带网络所产生的海量数据；为实现适合各种网络信息捕获，提出了物理层捕包策略；为均衡各节点机的负载，建立了一个基于TCP／IP协议四元组的数据划分模型．     

韩国首尔江南区：智能社区建设成功因素分析

以宽带经济为基础的智能社区 宽带网络使智能化社区“坐上高速列车”。作为实现社区智能化重要基础的宽带网络技术正在日益成熟，它的迅速发展使智能化社区的建设驶上了高速公路，它的大规模推广为社区实现各类信息的高速传输带来可能。全球“智能社区”评选活动所倡导的就是随着宽带经济的来临，如何建设发展以宽带经济为基础的社区理念。     

青岛帆基地SCDMA宽带无线系统

项目简介：该系统融入了智能天线、CS—OFDMA、动态信道分配、先建后拆切换技术等通信领域最前沿的技术，同时又完全避开了西方国家的知识产权壁垒。SCDMA宽带无线接入系统拥有国家授权的专用无线电频率，提供业界领先的高宽带、高容量和卓越的非视距传输能力，同时能够承载大容量语音和宽带数据业务，实现高性能与低成本的最佳组合。     

自适应宽带稳健波束形成及神经网络算法

针对被动跟踪系统中阵处理的要求，建立了适应宽带稳健波束形成设计方法，用神经网络算法实现了自适应宽带波束形成，从理论上解决了自适应阵观察方向上的稳健设计问题，抛弃了自适应阵的时延补偿器，将正则网络应用于自适应宽带波束形成，解决了阵处理中求二次约束解的非线性规划问题，并能在毫微秒时间内收敛，不仅保持了二次约束自适应波束形成的干扰抵消能力，而且克服了软约束带来的阵指向性两端上的现象，所建立的阵处理器能抵消干扰达40dB以上，工作带宽达到2个倍频程。     

浅谈宽带智能社区的网管建设

宽带信息化智能社区是利用现代４Ｃ计算机、通信与网络、控制和ＩＣ卡技术，通过有效的传输网络，多功能的社区综合布线系统，以成熟的信息处理技术、自动控制技术等为手段，所实现的社区综合信息网络系统。它为社区成员提供更加安全、高效、方便、舒适的智能化服务，对社区的各项事务、活动进行智能化管理，并具备先进灵活的手段来适应技术的发展，满足社区成员不断增长的需求。１宽带智能化社区的建设应用概况据资料统计，进军宽带网络产业的企业，仅上市公司国内就有２３家，其中投资社区宽带接入网的有１５家，每一家企业都为宽带业务投入了大量的资金。在这些企业中，比较有代表的有“长城宽带”、“北辰集团”、“清华紫光网联”、“神州数码网络”、“中兴公司”等等。提出的方案五花八门，但在主流技术上认识基本一致，那就是采用“ＦＴＴＢ”方式在将光缆联到社区，再用“宽带以太网”接入技术将用户接入，并在此基础上进行了发展。以中兴为例。中兴信息化智能社区系统摒弃了目前国内单纯构建智能社区或者单纯构建信息社区的思路，将社区的宽带信息化与社区的智能化进行了有效的统一。采用“ＥｖｅｒｙｔｈｉｎｇＯｖｅｒＩＰ”的设计思想，构建了集数据、语音、图像与智能控制于一体的宽带信息...     

宽带网络技术及其应用实现

介绍了几种典型的宽带主干网技术和宽带接入网技术，对各种技术的利弊进行了比较，讨论了宽带网上各种应用的实现方案．     

基于软件无线电的宽带数字中频接收机研究

分析了基于软件无线电的宽带数字中频接收机中的关键技术－带通采样下变频技术、数字下变频技术、多速率处理技术，并实现了欠采样技术条件的软件系统仿真。由此可见，在现有条件下实现宽带数字中频接收机是可行的。     

基于软件无线电的宽带数字中频接收机研究

分析了基于软件无线电的宽带数字中频接收机中的关键技术一带通采样下变频技术、数字下变频技术、多速率处理技术，并实现了欠采样技术条件的软件系统仿真。由此可见，在现有条件下实现宽带数字中频接收机是可行的。     

宏观

八部门联合发布《关于实施宽带中国2013专项行动的意见》 日前，工业和信息化部、国家发展和改革委员会、教育部、科学技术部、财政部、环境保护部、住房和城乡建设部、国家税务总局联合发布“关于实施宽带中国2013专项行动的意见》。意见指出，2013年新增固定宽带接入互联网用户将超过2500万户，新增3G用户1亿户。新增通宽带行政村18000个，实现5000所贫困农村地区中小学宽带接入或改造提速，启动实施“宽带网络校校通”工程。同时，使用4M及以上宽带接入产品的用户将超过70％。     

KHz—GHz传输线变压器的原理设计及应用

在移动通信和其他一些电子设备上都对电路提出了宽带的要求，其中就常常要用到有效的阻抗匹配变压器，理论表明传输线变压器可以实现多种阻抗变换比，并且在很宽的频带上，从几十ＫＨｚ到几千ＭＨｚ都有良好的宽带阻抗匹配特性。传输线变压器体积可以被做得很小，通过使用铁氧体磁环可以得到很好的电路特性。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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