计算机专业英语相关论文

Developmentofcomputernetworkcommunicationtechnology计算机网络通信技术的发展概况Withtherapiddevelopmentofscienceanditsapplicationincalculationintherealworld,ontheonehand,usersareinurgentneedofdifferentcomputersofthardwareandinformationresourcewhichsharingcanbeachieved.Ontheotherhand,alargeclassofproblemswiththegeographicaldistribution,whoseprocessingtodistributedcomputingtechnologycharacteristicsoftheseobjectiverequirementsledtothebirthofthecomputernetworkandthedevelopmentofthecomputernetworksystem.Inrecentyears,duetothehumansociety,therapidexchangeofinformationandfastprocessingneeds,aswellasdrivingtherapiddevelopmentofcomputerandcommunicationofthetwotechnologies,thecomputernetworkhasanunprecedenteddevelopment.Thecomputernetworkcommunicationtechnologyistheproductofcomputertechnologyandcommunicationtechnologycombinedwiththeadvancedtechnology,whichisoneofthefastestdevelopmentintheworld.随着计算科学及其应用的高速发展，在现实世界中，一方面，用户迫切需要实现不同计算机上软硬件和信息资源的共享，另一方面，有一大类问题本身具有地域上分布，其处理需要分布计算技术的特点这些客观要求导致了计算机网络的发展和网络计算机系统的诞生。近十多年来，由于人类社会对信息快速交换和快速处理的需求，以及在计算机和通信两大技术飞速发展的驱动下，计算机网络得到空前的发展。计算机网络通信技术是计算机技术与通信技术相结合的产物，是世界上发展最快的前沿技术之一。Thatcomputernetworkisusingthecommunicationequipmentandcommunicationlinesthatwillbeasetofgeographicdistributionofthesameordifferentcomputers,terminalsandancillaryequipmentinaccordancewiththeinterconnectionofsomewayuptoacomputerhardwaresystem.Onthebasisofthecomputerhardwaresystem,throughthedevelopmentthatcoordinatethecommunicationsystemofthecomputersystemorfurthernetworkoperatingsystem,whichcanmakeagroupofcomputerhardwareandsoftwareresourcessharewithcollaborativecomputingandcooperativelysolveaproblem.Bythecommunicationsystemornetworkoperatingsystemandcomputernetworktogether,wecanformanetworkofcomputersystems.所谓计算机网络是使用通信设备和通信线路将一组地理上分布的相同或不同的计算机、终端及其附属设备按照某种方式互联起来得到的一个计算机硬件系统。在这种计算机硬件系统的基础上，通过开发能协调各台计算机系统工作的通信系统或更进一步的网络操作系统，就能使一组计算机实现软硬件资源共享、协同计算，合作求解一个问题。由这种通信系统或网络操作系统连同网络计算机一起，就形成了网络计算机系统。Accordingtothedifferenceofthedatatransmissionrangeandtherealizationtechnology,thecomputernetworkisdividedintothelocalcomputernetworkandthewideareacomputernetwork.Localcomputernetworkisadatacommunicationsystem,thetransmissionrangeinsecondarygeographicalarea,mediumorhighspeeddatatransmissionrate,whichusesadedicateddatacommunicationlineorbuscommunication,connectingalargenumberofindependentequipmentinthephysicalcommunicationchannelstocommunicatewitheachother.Wideareacomputernetworksisdifferentincities,differentnations,thecomputerorcomputernetworkthroughhierarchicalinterconnectiontechnologyareconnectedtogether,itstransmissionrangecanbequitefardistance.Atpresent,themostcommonistheuseofapublicorprivatetelephonelinecommunication,backbonenetworkandanumberoflocalareanetworkusingdigitalcommunicationofopticalfiberandcabledatacommunicationarespeciallines.NetworkusersareconnectedtotheInternet,youcancommunicatewithothernetworkusersfarbeyondthehorizonthroughtheircomputers,throughthenetworksoftwaretoqueryavarietyofinformationresources.Withthecomputernetwork,andinrecentyearsthedevelopmentofbroadbandcommunicationmedium,andapparatus,andcommunicationdatatransmissionratewillcontinuetoimprove,inthefuture,theuseofinternetteaching,watchingforreal-timenewsshows,onlinebookingandshopping,networkvideoconference,networkhospitaloutpatient,etc.,itisnolongersciencefiction.Onthenetworkeachcomputerwithanodesaysthelinkbetweenmachineandmachinepathlinesandsaysthattheyconstituteanetworkcomputerarchitectureinsomeofthebasicalgorithmofmathematicaldescriptionoftheobjectrepresentationbasis按照数据传输范围和实现技术的不同，计算机网络存在局域计算机网络和广域计算机网络之分。局域计算机网络是一个数据通信系统，其传输范围在中等地理区域，使用中等或高速数据传输速率，使用专用数据通信线或总线进行通信，可联接大量独立设备，在物理通信通道上互相通信。广域计算机网络把不同城市、不同国家中的计算机或计算机网络通过分级互联技术联接起来，其传输范围可达到相当远的距离，目前最常见的是使用公用或专用电话线通信，主干网和一些局域网使用可进行数字通信的光纤光缆数据通信专用线。联接到网上的网络用户，可以通过自己的计算机与远在天边的其他网络用户进行通信，通过网络软件查询网上的各种信息资源。有了计算机网络，加上近年来宽带通信介质和设备的开发，以及通信数据传输速率的不断提高，今后，利用互联网教学、收看实时新闻节目、网上订票和购物、网络电视会议、网络医院门诊，等等，就不再是科学幻想。网络上的每台计算机用一个结点表示机器与机器之间的链路用线和路径表示，他们构成了网络计算机体系结构中一些基本算法研究中数学描述的对象表示基础。Computercommunicationnetworkisthecombinationofcomputertechnologyandcommunicationtechnology,andtheformationofanewcommunicationmode,mainlytomeettheneedsofdatacommunication.Itadifferentgeographicalarea,withindependentfunctionsofmultiplecomputers,terminalsandancillaryequipmentconnectedbythecommunicationlink,andisequippedwiththecorrespondingnetworksoftware,communicationsystemtorealizethesharingofresourcesinthecommunicationprocessandtheformationof.Itcannotonlymeetthelocalareaofaenterprises,companies,schoolsandofficesofdata,filesaretransferredandinanationalandevenworldwideforinformationexchange,storageandprocessing,atthesametimecanprovidecomprehensiveservicesofvoice,dataandimage,hasattractiveprospectsfordevelopment.Thecomputercommunicationrevolutionhasbroughtthefollowingimportantfacts:dataprocessingequipment(computer)anddatacommunicationequipment(exchangetransmissionequipment)isnolongeressentiallythedifferencebetween.Thereisnoessentialdifferencebetweendatacommunication,voicecommunicationandvideocommunication.Thedifferencebetweensingleprocessorcomputer,multipr