网络技术

ABSTRACT Over the last few years much attention has been paid to the development of the technologies for Community Antenna Television networks. New technologies that can be used to support data communication service over CATV networks are developed. The new Hybrid Fiber Coaxial technology is spreading out rapidly in CATV networks. The usage of fiber provides large bandwidth and thus enables some new services to be delivered along with television broadcast. The CATV networks are expected to support diverse traffic with various service requirements.

随着新技术的不断发展，人们希望能够利用有线电视网络提供新的业务，HFC技术在有线电视网络中的广泛使用使得有线电视网络的带宽增加，也使得有线电视网络除电视广播外还能够提供其他的服务，这些服务的服务质量要求各不相同，如：数据服务要求低的丢失率，对延时的要求较低；而语音服务可容忍一定的丢失，但对延时、延时抖动有严格的要求，因此需要开发新的协议。

The harm of worms' outbreak becomes greater and greater. Such make worm detection and defense technology face an increasingly tough challenge. Attack Signature Automatically Generation technology is one of the key technologies, this paper focuses on the ASAG technology for research, its main jobs include: 1）Analyzed the research status of ASAG technology from the overall, described its design goals and evaluation criteria, and the current approaches' limitations is given. 2） After deeply researching and analyzing a various of ASAG systems, a basic framework for the network ASAG system is presented, and the detailed analysis of the main function of the components in the framework is also presented. 3）An attack capture model based on distributed honey-pots system is presented. This mode integrates the anomaly detection which based on the mode of dubiety score in the honey-pots, can do a second filter for the samples in honey-pots, and improve the purity of the samples captured. 4） A simple noise-resilience ASAG algorithm is presented, which used the behavioral characteristics of the worm outbreak to generate efficient signatures of samples in the suspicious dataset, which contains large amounts of noisy data, under the complex environment.

攻击特征自动提取技术是网络蠕虫防御技术的关键技术，本文围绕攻击特征自动提取技术开展研究工作，其主要工作包括： 1）对攻击特征自动提取技术的研究现状进行了综述，介绍其设计目标与评价标准，并指出了现有方法存在的局限性； 2）在深入研究与分析各种攻击特征提取系统的基础上，提出基于网络的攻击特征自动提取系统的基本框架，并详细分析框架中各部件的主要功能； 3）提出了基于分布式蜜罐系统的攻击样本捕获模型，该模型在分布式蜜罐系统的基础上，结合基于可疑度模型的异常检测，对蜜罐中的样本进行二次过滤，较好地提高了捕获样本的纯净度； 4）提出一种简单抗噪的攻击特征自动提取算法，该算法利用蠕虫爆发时的行为特征，在复杂环境下含有大量噪声数据的可疑样本训练集中提取有效的特征，降低对样本纯净度的依赖。

By studying and analyzing the various Neural Network and intelligent fault diagnosis, associating the difficulty which is to measure the interior signal of cycloconverter, the thesis puts forward the cycloconverter fault diagnosis which bases on Neural Network and takes cycloconverter input voltage and output current as the input of NN. According to the self-learning and non-linearity of NN, it can confirm the position of SCR fault.

通过对国内外多种神经网络和智能故障诊断技术的分析比较，并考虑到直接检测变频器内部有关信息的难度，本文提出并研究了基于神经网络的变频器故障诊断技术，以变频器输入/输出有关电量特征值作为神经网络的输入，通过神经网络的自学习方式，对变频器内部晶闸管故障进行定位。

The analysis of the optical signal transmission characteristics and the physical parameters provides the theoretical foundation for optimizing the design and improving the performance of AWG; and the optimizing design numerical value calculation method solves the complex problem of the optimizing design of the AWG, it can also provide a way for AWG computer aided design system; the AWG optical signal processing analysis provide a way for optical signal Fourier transform, serial and parallel transmission, circle shift, matrix transform and differential processing; the optical signal processing characteristics of AWG develop AWG to use for new field, and the optical signal processing will play an important role on all-optical networks in the future; by the definition of the wavelength transform matrix of the AWG, the signal output positions that come from these input signals of the different wavelength or the same wavelength but the different input ports and carrying different signals can be accurately determined, and the wavelength transmission matrix plays an important role for analyzing the routing of the complex optical network, or designing the network nodes such as the optical path add/drop multiplexer and optical cross connect device; the wavelength transmission matrix also provides a method for monitoring and managing the wavelength transmission of the optical network nodes; e analysis of the AWG' OXC node structure and wavelength routing provides a way for realizing the OXC, especially for multi-path/multi-wavelength OXC and the intelligence node of the optical networks; by the studying of the control plain characteristics, router, traffic engineering, program and the improved arithmetic of the wavelength routing, the method for realizing the GMPLS' OXC optical transport network is provided, and it play an important role for the study of the automatic switched optical network; the time-frequency analysis can provide more information about the dispersion and energy changes of .the pulsed light transmission in the singlemode fiber, it also provides more useful parameters for analyzing the dispersive accumulating and dispersive compensating.

AWG光信号传输特性与相关参数的分析，为进一步优化设计AWG及提高其性能提供了理论依据，而优化设计计算数值方法解决了AWG优化设计计算的复杂问题，为进一步建立AWG的计算机设计系统提供了基础；AWG光信号处理的特性分析，提出了AWG应用的新领域，为光信号的傅立叶变换、串并传输、循环移位、矩阵变换、微分处理等提供了一条途径；波长传输矩阵变换关系的建立，不仅得到了确定多路AWG每路信号从输入端口到输出端口的准确输出位置的方法，而且在分析应用AWG实现复杂的光通信网络路由的连接、特别在设计分插复用器和交叉连接器等网络节点时有重要的作用，能有效而准确地确定波长的路由关系，为实现节点波长传输路由的监控和管理提供有效手段；基于AWG的OXC结构和波长路由的确定为实现OXC技术、特别是多路多波长的OXC和光网络的智能节点技术提供了有效的方法；控制平面的特征、路由器、流量工程、程序及改进的波长路由算法的研究实现了基于GMPLS的OXC光传送网络的控制平面，为建立自动交换光网路提供了一定的基础；时频分析可以更直观和更清晰地描述脉冲信号在单模光纤中传输色散和能量的变化，为色散积累和色散补偿提供有效的分析参数。

For the characteristics of voile cleaning machine in textile producing, a new control system based on CAN fieldbus is presented in this paper, The principle of the system is introduced, The interface of the network and the communication protocol of the system are discussed in detail, The design of control software is also analyzed, the main program of communication is given. For CAN network communication of master and slave station,the system works reliably, and the voile cleaning is controlled intelligently. It is an advanced control technology. which is verified in practice .

针对纺织生产过程中清纱机的工作特点，提出了一种基于CAN总线技术的控制系统设计方法，分析了系统的工作原理、网络拓扑结构及其硬件构成，详细阐述了CAN总线的网络接口方法和系统通信协议，讨论了控制软件的设计，给出了CAN网络的主要通信程序，由于这种系统的主、从站之间采用CAN网络通信，实现了对清纱工程的智能控制，系统具有运行可靠、性能价格比高的特点，实践证明这是一种先进的控制技术，具有较大的推广意义。

Utilizing the real data of ready-made network of ZZMCC,the emphasis is placed on the GSM Network of ZZMCC.Regarding the ZZMCC as the research object, this paper launches systematically the analysis and research of teletraffic forecasting model. So we can modify the parameters to operate the network so as to get the most benefits. Make an overview of the mobile communication optimization analyze the method, Give network general the test results, and bring forward some resolving method according to the practical network optimizations. The capability of the GSM network is becoming more and more saturation for the increasing of telephone subscriber. it is important to improve the quality of the network. This article makes an analysis for the optimization of the network ZZMCC.

接下来利用漳州移动公司的现网实际数据，重点介绍漳州GSM网络本文以漳州移动通信有限责任公司GSM网络作为研究对象，比较系统地开展有关话务预测模型的分析研究和应用，使得网络达到最佳运行状态，更好地为用户服务同时总结了移动通信网的一般优化方法，并从理论出发，给出实际网络优化过程中的一些解决方法随着移GSM用户的增长，网络的规模及容量日趋饱和，因此加强网络优化力度，提高网络质量将是网络建成后的重要工作结合漳州移动网络优化的实际情况，通过技术手段，对改善网络质量作简单分析

The teaching and learning action based on network becomes popular in current high school, by the didactical feedback information of all kinds can be obtained after the processing of education information.It can provide the scientific and effective instruction for the teaching and the learning. This paper focused on the education information processing method and the realization technology with middleware based on network.

基于网络环境的教学活动在高校日益普及，通过对网络教学环境中教育信息的处理得到的各类教学反馈信息能为教师施教和学生学习提供科学有效地指导作用，本文在研究网络教学环境中的教育信息处理方法的基础上，结合中间件技术重点探讨了数学处理方法在网络平台的实现技术。

The campus network is an important part of the construction of university modernization and its security issues is also intimidatory by various problems. This article is for the campus network security features of the discussion based on a three layer switch embedded virus defense and information monitoring system, which researches the technical problems based on the embedded virus defense and information monitoring system, and provide the solutions and development based on the existing technologies.

高校校园网络是高校现代化建设中重要的组成部分，同样，其安全问题也受到各个方面的威胁，本文结合高校网络建设过程中校园网络的安全特点，对于基于三层交换机的校园网络防御体系进行了探讨，研究了基于三层交换机嵌入式病毒防御与信息监控系统要解决的技术问题，并依据现有的技术提出了解决方案及发展的趋势。

The cardinal research work is the following: First, analyzed the reason of innovation of to "Biochemistry" curriculum by modern educational technology, the idea and principle of innovation; Second, exploit "Biochemistry" network curriculum fore-six chapter radical content by instruction of educational and psychological theory , subject to Modern Far-distance Education Resource Construction Technical Specification put forth by Far-distance Education Resource Council of Education Department, and by using many kinds of application software; Third, made up module of "Biochemistry" network curriculum, categorize this discipline into preliminary knowledge structure units, made a lot of animated and graphical multimedia stoff and try to reveal new ideas and method, etc, of network curriculum; Finally,"Biochemistry" network curriculum has been used in practical teaching , and it has brought about a good effect and won students high praise

其主要研究的工作为：一、分析了为什么要用现代教育技术革新&生物化学&课程以及革新的观念和原则；二、在具体实践中，以教育心理学理论为指导，以教育部远程教育资源委员会提出的《现代远程教育资源建设技术规范》为依据，结合多种应用软件系统地开发了&生物化学&网络课程前六章的基础内容；三、构建了&生物化学&网络课程的模块结构，并对刻学科的基础知识部份内容作了初步的知识单元结构的化分，加工制作了相当数量的动画类素材及图形类素材，并力求通过&生物化学&网络课程开发的实践揭示网络课程开发中新的理念和方法等；四、将已开发的部份课程内容用于实际教学，效果较好，学生评价较高

This paper introduces the mesh network structure into zigbee technology after analyzing the mac layer and road protocol of zigbee technique, and need hardware mesh network support.

无线 mesh 网络是一种新型的发展迅速的无线通信网络架构。文章分析了 zigbee 技术 MAC 层协议和路由协议，以及 mesh 网络所需的软硬件支持，从而把 mesh 网络架构引进 zigbee 技术中。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。