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75 个结果
  • 简介:Tointroducethemethodandcurativeeffectoftreatingpseudoaneurysmsbypaddingandcompression.Method:retrospectivelyanalyzethecurativeeffectoftreating17pseudoaneurysmsbypaddinghardthingsandcompression.Result:15ofthemwascompletelyrecoveredbydoingso,murmurdisappearedandthelocalskinbecameeven,therewasnorecurrencesandcomplicationsafter0.5-3year'sfollowingup,buttheothertwowerethesameasbeforethetherapy.Conclusion:pseudoaneurysmscanbetreatedeffectivelybypaddingandcompression

  • 标签: 假性动脉瘤 肿瘤 医疗作用 填料 压缩
  • 简介:Acompressionalgorithmisproposedinthispaperforreducingthesizeofsensordata.Byusingadictionary-basedlosslesscompressionalgorithm,sensordatacanbecompressedefficientlyandinterpretedwithoutdecompressing.Thecorrelationbetweenredundancyofsensordataandcompressionratioisexplored.Further,aparallelcompressionalgorithmbasedonMapReduce[1]isproposed.Meanwhile,datapartitionerwhichplaysanimportantroleinperformanceofMapReduceapplicationisdiscussedalongwithperformanceevaluationcriteriaproposedinthispaper.Experimentsdemonstratethatrandomsamplerissuitableforhighlyredundantsensordataandtheproposedcompressionalgorithmscancompressthosehighlyredundantsensordataefficiently.

  • 标签: 数据压缩 传感器 无损压缩算法 冗余度 评价标准 应用程序
  • 简介:TwogradesofDyneema~?compositelaminateswiththecommercialdesignationsofHB26andHB50werecutintoblockswithorwithoutanedgecrackandcompressedinthelongitudinalfiberdirection.Thecrackedanduncrackedspecimensshowsimilarcompressiveresponsesincludingfailurepatternandfailureload.ThetwogradesofDyneema~?compositesexhibitsdifferentfailuremodes:adiffuse,sinusoidalbucklingpatternforDyneema~?HB50duetoitsweakmatrixconstituentandakinkbandforDyneema~?HB26duetoitsrelativelystrongermatrixconstituent.AneffectivefiniteelementmodelisusedtosimulatethecollapseofDyneema~?composites,andthesensitivityoflaminatecompressiveresponsestotheoveralleffectiveshearmodulus,interlaminarshearstrength,thicknessandimperfectionangleareinvestigated.Thechangeoffailuremodefromkinkbandtosinusoidalbucklingpatternbydecreasingtheinterlaminarshearstrengthisvalidatedbythefiniteelementanalyses.

  • 标签: 复合材料层合板 DYNEEMA 正弦屈曲 失效模式 压缩 层间剪切强度
  • 简介:Thestrengthoflightweightconcreteundertriaxialcompressivestressisstudiedexperimentallywiththeconcretetriaxialapparatusdesignedbytheauthors,andiscomparedwiththatofnormalconcreteunderthesamestressstate.Ninety-five100mmcubesundertwentystressratiosaretested.Ascomparedwithnormalconcrete,itisfoundthatnotonlythemultiaxialcompressivestrengthoflightweightconcreteissmall,butalsotheratioofthemultiaxialcompressivestrengthtotheuniaxialcompressivestrengthissmall.Theinfluenceoftheintermediateprincipalstressonthemultiaxialstrengthoflightweightconcreteisdiscussed.Thestrengthcriteriawhichareexpressedintheprincipalstressesandtheoctahedralstressesrespectivelyareproposed.

  • 标签: LIGHTWEIGHT CONCRETE TRIAXIAL compression STRENGTH CRITERION
  • 简介:在无损失的压缩的地里,当他们面对集体数据时,传统的软件的大多数类型有一些缺乏。他们的压缩能力被数据窗口尺寸和压缩格式设计限制。这份报纸论述格式说出支持数据窗户尺寸直到4GB并且在集体数据压缩有一些优点的CZ格式的压缩的一个新图案。用这种格式,一个压缩共享软件说出ComZip被设计。实验结果支持那ComZip在大多数情况中比WinZip,Bzip2和WinRAR有更好的压缩比率,特别当集体数据的GB或TB被压缩时。并且ComZip有潜力当数据窗户尺寸超过128MB,在未来打败7压缩。

  • 标签: 数据压缩格式 设计 数据窗口 WINZIP WINRAR 无损压缩
  • 简介:高压缩比率,高译码性能,和进步数据传播是为WebGIS的向量数据压缩算法的最重要的要求。满足这些要求,我们在场一条新压缩途径。这篇论文由把漂流坐标变换成整数坐标以多尺度的数据的产生开始。在屏幕上的变换的点和原来的点之间的距离在2个象素以内,这被证明,因此,我们的途径对顾客方面上的向量数据的可视化合适。整数坐标被传递给一个整数小浪变压器,并且高周波的系数由变压器生产了被正规哈夫曼代码编码。河数据和道路数据上的试验性的结果表明建议途径的有效性:为河数据的压缩比率罐头活动范围10%和20%为道路数据分别地。我们断定更多的注意需要被付到在包含一些点的弯曲之间的关联。

  • 标签: 向量数据压缩 WebGIS 进步数据传播
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  • 简介:IntermittentPneumaticCompression(IPC)hasbeenusedsuccessfullyforthepreventionofearlypostoperativedeepveinthrombosis(DVT).RecentlyIPChasbeendescribedforthetreatmentoflymphedema,chronicedema,recoveryfromlowerextremityulcersandtheenhancementofwoundhealing.ForgoodapplicationsofIPCinclinic,itisnecessarytostudyitseffectivemechanismfurther.Wemeasuredsome

  • 标签: hasbeen Compression EDEMA POSTOPERATIVE CLINIC HEALING
  • 简介:MultistageVectorQuantization(MSVQ)canachieveverylowencodingandstoragecomplexityincomparisontounstructuredvectorquantization.However,theconventionalMSVQissuboptimalwithrespecttotheoverallperformancemeasure.Thispaperproposesanewtechnologytodesignthedecodercodebook,whichisdifferentfromtheencodercodebooktooptimisetheoverallperformance.Theperformanceimprovementisachievedwithnoeffectonencodingcomplexity,bothstorageandtimeconsuming,butamodestincreaseinstoragecomplexityofdecoder.

  • 标签: VECTOR QUANTIZATION Data compression SYNTHETIC APERTURE
  • 简介:Asimpleandadaptivelosslesscompressionalgorithmisproposedforremotesensingimagecompression,whichincludesintegerwavelettransformandtheRiceentropycoder.ByanalyzingtheprobabilitydistributionofintegerwavelettransformcoefficientsandthecharacteristicsofRiceentropycoder,thedivideandrulemethodisusedforhigh-frequencysub-bandsandlow-frequencyone.High-frequencysub-bandsarecodedbytheRiceentropycoder,andlow-frequencycoefficientsarepredictedbeforecoding.Theroleofpredictoristomapthelow-frequencycoefficientsintosymbolssuitablefortheentropycoding.ExperimentalresultsshowthattheaverageCompressionRatio(CR)ofourapproachisabouttwo,whichisclosetothatofJPEG2000.Thealgorithmissimpleandeasytobeimplementedinhardware.Moreover,ithasthemeritsofadaptability,andindependentdatapacket.Sothealgorithmcanadapttospacelosslesscompressionapplications.

  • 标签: 遥感图像 无损压缩 赖斯熵编码器 整数离散小波变换
  • 简介:Inthispaper,thetechniqueofquasi-losslesscompressionbasedontheimagerestorationispresented.Thetechniqueofcompressiondescribedinthepaperincludesthreesteps,namelybitcompression,correlationremovingandimagerestorationbasedonthetheoryofmodulationtransferfunction(MTF).Thequasi-losslesscompressioncomestoahighspeed.Thequalityofthereconstructionimageunderrestorationisuptoparofthequasi-losslesswithhighercompressionratio.TheexperimentsoftheTMandSPOTimagesshowthatthetechniqueisreasonableandapplicable.

  • 标签: quasi-lossless compression image RESTORATION FIDELITY PEAK
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  • 简介:Westudythebucklingofaonefibercompositewhosematrixstifnessisslightlydependentonthecompressiveforce.Weshowthattheequilibriumcurvesofthesystemexhibitalimitloadwhentheinducedstifnessparametergetsbiggerthanathreshold.Thislimitloadincreaseswhenthestifnessparameterisincreasinganditisrelatedtoapossiblelocalizedpathinthepost-bucklingdomain.Suchachangeinthemaximumloadmaybeverydesirablefromastructuralstandpoint.

  • 标签: 纤维复合材料 刚度参数 后屈曲 压缩力 极限载荷 复合基质
  • 简介:小粒的材料在工业并且在自然是无所不在的。为小紧张,有弹性塑料、发育不全的组成的关系广泛地在设计实践被使用,但是他们不是内在的物理的重要思考。在解释材料的物理的一个统一热力学框架下面,小粒的稳固的水动力学(GSH)是向描述小粒的材料,不是仅仅像固体,而且像液体的行为的延期。在这份报纸,GSH的基础简短被对待然后简化了在triaxial压缩分析quasistatic变丑。计算压力紧张关系和容量的紧张与试验性的结果相比。在GSH的主要参数的影响,特别他们的生气联合影响,被分析,他们的物理意思进一步被澄清。在参数被校准以后,处于典型压力状态的计算压力价值被发现在22%测试价值以内。同时,精力驱散在triaxial压缩期间被分析。上述结果支持并且部分确定GSH。

  • 标签: 颗粒状物料 流体动力学 三轴压缩 固体状 试验参数 塑性本构关系
  • 简介:Ensuringahighmanufacturingtestqualityofanintegratedelectroniccircuitmandatestheapplicationofalargevolumetestset.Evenifthetestdatacanbefitintothememoryofanexternaltester,theconsequentincreaseintestapplicationtimereflectsintoelevatedproductioncosts.Testdatacompressionsolutionshavebeenproposedtoaddressthetesttimeanddatavolumeproblembystoringanddeliveringthetestdatainacompressedformat,andsubsequentlybyexpandingthedataon-chip.Inthispaper,weproposeascancellpositioningmethodologythataccompaniesacompressiontechniqueinordertoboostthecompressionratio,andsquashthetestdataevenfurther.Whilewepresenttheapplicationoftheproposedapproachinconjunctionwiththefan-outbaseddecompressionarchitecture,thisapproachcanbeextendedforapplicationalongwithothercompressionsolutionsaswell.Theexperimentalresultsalsoconfirmthecompressionenhancementoftheproposedmethodology.

  • 标签: 测试数据压缩 扫描单元 输出网络 细胞定位 外部存储器 测试应用
  • 简介:Surfaceoriginatedkinkbandsconsistofanimportantfailuremodeforfibre-reinforcedcompo-sitesundercompression.Themechanicalbehaviorofthefibrebridgingkinkbandsisexploredhereininthecontextofthepost-microbucklingtheory.Expressionsofbridgingforceareobtainedfortheentirepostbucklingprocessofthefibresexhibitingweakorstronghardening.Thepostbucklingformulationofthefibresisappliedtoyieldthetoughnessincrementduetotheadvancingkinkbands,andconsequentlyleadstoaquantitativepre-dictionontheoverallcompressivestressstraincurvesofthefibre-reinforcedcomposites.

  • 标签: FIBRE reinforced COMPOSITES post-microbuckling KINK BAND
  • 简介:Inthepresentpaper,atheoreticalmodelisproposedtoanalyzethetransientbehaviorofsuppressionofrotatingstallinaxialcompressionsystemsthroughtheuseofanadditionaldistubance,Thegoverningequationsofthemodelareasetofsimultaneousnonlinearfirstorderpartialdifferentialequations,andfornumericalcalculations,asimpleexplicittimemarchingmethodcanbeused.Theinfluenceofsystemparametersonthesuppressioneffectivenessandtheinteractionbetweenrotatingstallandsurgehavebeendiscussedinitially.TheanslysisoftheinfluenceofsystemparameterspresentsthatboththeBparameterandaxisymmetriccomprssorcharacteristichavesignificanteffectonthestabilizationeffectivenessofacontrolstrategy.TheeffectivenessdecreasesasthevalueofBandthenumberofstagesorstageloadingofthecompressorincrease,Ithasbeenfoundthattheonsetflowrateofrotatingstallandsurgeinacompressionsystemmaybedifferent,andthereisastronginteractionbetweenthesetwokindsofinstabilities.TheonsetflowrateofpureonedimensionalsurgedependsonthevalueofBandaxisymmetriccompressorcharacteristic,besidestheslopeofthecompressorcharacteristic.Insomecases,whenrotatingstallwhichisthenaturalmodeofinstabilityinacompressionsystemissuppressedonedimensionalsurgecanoccur,Itoftenlimitstheeffectivenessofacontrolstrategytosuppressrotatingstall.Butwhensurgeisintiatedbyratatingstall,itisalsopossibletoinhibittheoccurrenceofsurgebysuppressingrotatingstallinacompressionsystem.

  • 标签: 透平机 压缩系统 数字模拟