简介:刚过去的2004年对于随身听的缔造者索尼来说是一个颇为特殊的年份。这一年的7月1日,索尼迎来了随身听家族的25岁生日。Hi-MD和硬盘随身听等一系列新品的发布和上市也标志着这个庞大的随身听家族迎来了全面网络化。在网络的光环下,在Hi-MD和硬盘随身听的冲击下,也许很少有人再会想到古老的CD随身听了。但资深的发烧友也许不会忘记,1984年第一台CD随身听D-50面世,所以2004年正好是CD随身听的20周年纪念。在这个时候,索尼悄悄放出了最新的20周年纪念版CD随身听D-NE20。其中的“20”也许正代表着CD随身听走过的20个年头。无论是磁带,CD还是MD,索尼的纪念版随身听在设计,音质等方面常常有高人一筹的表现。此次D-NE20虽是低调出征,但CD随身听20周年纪念版的光环仍然令我们对它寄予厚望。
简介:打印的3D变得流行并且广泛地在最近的年里在各种各样的应用被使用了。越来越多的家用户有动机设计他们的自己的模型然后用3D打印机制作他们。然而,打印目标可以有结构的一些或因为用户可以是3D模型上的压力分析上的知识的缺乏,强调缺点。在这份报纸,我们在场帮助用户分析的一条途径一模型结构的力量当设计它的形状时。我们采用部分结构的分析而不是常规女性(有限元素方法)计算地昂贵的分析。基于部分结构的分析,我们在集成网孔设计帮助的途径进口骨骼,力量计算和网孔修正很好。骨骼能也指导节为分析造和负担计算。为有在在从分析结果的模型的阀值价值上的高应力的弱区域,我们的系统由放大骨骼的相应骨头以便使这些区域足够生硬改正他们。很多个实验表明了我们的途径的适用性和有实行可能。
简介:Amethod,calledTwo-DimensionalExtendedAttributeGrammars(2-DEAGs)fortherecognitionofhand-printedChinesecharactersispresented.Thismethodusesdirectlytwodimensionalinformation,andprovidesaschemefordealingwithvariouskindsofspecificcasesinauniformway.Inthismethod,componentsaredrawninguidedandredundantwayandreductionsaremadelevelbylevejustinaccordancewiththecomponentcombinationrelationsofChinesecharacters.Themethodprovidsalsopolysemousgrammars,coexistinggrammarsandstructureinferringswhihconstrainredundantrecognitionbycomparisonamongsimilarcharactersofcomponentsandgreatlyincreasethetoleranceabilitytodistortion.
简介:Aimingatachievingthehighaccuracy3Dmodelfromsliceimages,anewmodelreconstructionmethodusingsliceimagesisproposed.Wantingtoextracttheoutermostcontoursfromsliceimages,themethodoftheimprovedGVF-Snakemodelwithoptimizedforcefieldandraymethodisemployed.Andthen,the3Dmodelisreconstructedbycontourconnectionusingtheimprovedshortestdiagonalmethodandjudgmentfunctionofcontourfracture.Theresultsshowthattheaccuracyofreconstruction3Dmodelisimproved.
简介:A3D-viewishelpfultoinstantlygraspwhatispresentedinadrawing.Thereexistavarietyofwaystopresentthesamepartwith3D-views.Tofacilitatethechoiceofanoptimumoneamongthem,theworkdividescompositesolidmodelsintothreecategories,soastoconveytheoriginalityofdesignconciselyandaccuratelybyusingtheleast'engineeringlanguage'.
简介:Inthispaperweproposeasufficientconditionforminimalroutingin3-dimensional(3-D)mesheswithfaultynodes.Itisbasedonanearlyworkoftheauthoronminimalroutingin2-dimensional(2-D)meshes.Unlikemanytraditionalmodelsthatassumeallthenodesknowglobalfaultdistributionorjustadjacentfaultinformation,ourapproachisbasedontheconceptoflimitedglobalfaultinformation.First,weproposeafaultmodelcalledfaultycubeinwhichallfaultynodesinthesystemarecontainedinasetoffaultycubes.Faultinformationisthendistributedtolimitednumberofnodeswhileitisstillsufficienttosupportminimalrouting.Thelimitedfaultinformationcollectedateachnodeisrepresentedbyavectorcalledextendedsafetylevel.Theextendedsafetylevelassociatedwithanodecanbeusedtodeterminetheexistenceofaminimalpathfromthisnodetoagivendestination.Specifically,westudytheexistenceofminimalpathsatagivensourcenode,limiteddistributionoffaultinformation,minimalrouting,anddeadlock-freeandlivelock-freerouting.Ourresultsshowthatanyminimalroutingthatispartiallyadaptivecanbeappliedinourmodelaslongasthedestinationnodemeetsacertaincondition.Wealsoproposeadynamicplanar-adaptiveroutingschemethatoffersbetterfaulttoleranceandadaptivitythantheplanar-adaptiveroutingschemein3-Dmeshes.Ourapproachisthefirstattempttoaddressadaptiveandminimalroutingin3-Dmesheswithfaultynodesusinglimitedfaultinformation.