简介：可能是由于圣诞节和新年的原因，2004年的最后一期《CHIP》在2005年1月份才到达编辑部；也可能是DVD刻录机的价格一路走低，目前已成为光储设备的主流产品，《CHIP》在本期杂志上制作了一个内容相当丰富的DVD刻录专题——“DiebestenRohlingeundBrenner”(最好的盘片和刻录机)。

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简介：Thetrafficbufferingproblemsintheethernetoversynchronousdigitalhierarchy(EOS)areintroducedandanalyzed.Differentsolutionsarealsopresentedindetail.SynchronousDRAM(SDRAM)isusedasoff-chipbuffertostore-and-retransmissionethernetframes.Anewandeasycontroldesignisintroducedhere.Thebufferareasizeonchipisgreatlyreducedandthepowerdissipationislowedatthesametime.

简介：众所周知，中国芯片厂商瑞芯微推出的ROCKCHIP芯片具有支持MPEG4和AVI的视频文件播放的真正MP4娱乐功能。最近，清华同方推出一款搭载ROCKCHIP芯片的播放器——T＆F-88。

简介：Beingdirectedagainettwokinksofnoiseinopticalfibersensors,asim-pleandeffectivemethodofautomaticcompensationforopticalfibersensorsispresented.Notonlytheunstabilityeffectoflightsource,butalsozerodriftofphotoelectronicde-vices,canbeeliminatedorenormouslyrestranedwiththeaidofthismethod.Inanotherway,byusingsingle-chipmrcrocomputer,theopticalfibersensorsystemfabricatediscaonnetedtoacopmuternetworkstorealizeanautomaticcompensation.

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简介：Objective:TostudythechangesofthegeneexpressionpatternofspinalcordtissuesintheearlystageafterinjurybyDNAmicroarray(genechip).Methods:ThecontusionmodelofratspinalcordwasestablishedaccordingtoAllen'sfallingstrikemethodandthegeneexpressionpatternsofnormalandinjuredspinalcordtissueswerestudiedbygenechip.Results:Theexpressionof45geneswassignificantlychangedintheearlystageafterspinalcordinjury,inwhich22genesup-regulatedand23genesdown-regulated.Conclusions:Theexpressionofsomegeneschangessignificantlyintheearlystageafterspinalcordinjury,whichindicatesthecomplexityofsecondaryspinalcordinjury.