简介：Compressivesensingisarevolutionaryideaproposedrecentlytoachievemuchlowersamplingrateforsignals.Intheimageapplicationwithlimitedresourcesthecameradatacanbestoredandprocessedincompressedform.Analgorithmformovingobjectandregiondetectioninvideousingacompressivesamplingisdeveloped.Thealgorithmestimatesmotioninformationofthemovingobjectandregionsinthevideofromthecompressivemeasurementsofthecurrentimageandbackgroundscene.Thealgorithmdoesnotperforminversecompressiveoperationtoobtaintheactualpixelsofthecurrentimagenortheestimatedbackground.Thisleadstoacomputationallyefficientmethodandasystemcomparedwiththeexistingmotionestimationmethods.Theexperimentalresultsshowthatthesamplingratecanreduceto25%withoutsacrificingperformance.

简介：压缩力量，氯化物穿入抵抗和二高效的水泥的微观结构不到三被检验治好条件。治好的条件包括治好的标准(SC)，治好匹配(MC，哪个工具在温度治好的封上的具体标本控制了盒子)并且根据温度的发展法律裸体水泥(NMC)治好匹配在地点上在集体水泥测量了。结果显示在MC和NMC下面的水泥在SC下面比那显示出更高的抵抗到氯化物穿入。在MC下面的水泥在NMC下面比那些有稍微更低的氯化物穿入，但是在NMC下面的标本的压缩力量比在在56d的MC下面的那高。另外，在NMC和MC下面具体比在SC下面有更高早的力量，特别在早年龄。然而，治好在248白天影响水泥的压缩力量的条件的顺序是：SC>NMC>MC。

简介：Concreteinreinforcedconcretestructure(RC)isgenerallyundersignificantcompressivestressload.Toguaranteerequiredqualityandductility,varioustestshavetobeconductedtomeasuretheconcrete'scompressivestrengthbasedonACI(AmericanConcreteInstitute)code.Investigationsofrecentdevastatingcollapsesofstructuresaroundtheworldshowedthatsomeofthecollapsesdirectlyresultedfromthepoorqualityoftheconcrete.Thelessonlearnedfromthesetragediesisthatguaranteeinghighqualityofconcreteisoneofthemostimportantfactorsensuringthesafetyofthereinforcedconcretestructure.Inordertoensurehighqualityofconcrete,anewmethodforanalyzingandevaluatingtheconcreteproductionprocessiscalledfor.Inthispaper,theindicesoffitandstabledegreeareproposedasbasistoevaluatethefitnessandstabilityofconcrete'scompressivestrength.Thesetwoindicesarecombinedtodefineandevaluatethequalityindexofthecompressivestrengthofconcrete.Principlesofstatisticsareusedtoderivethebestestimatorsoftheseindices.Basedontheoutcomeofthestudy,aconcretecompressivestrengthqualitycontrolchartisproposedasatooltohelptheevaluationprocess.Finally,anewevaluationproceduretoassessthequalitycontrolcapabilityoftheindividualconcretemanufacturerisalsoproposed.

简介：Inordertoimprovethecompressivestrengthofxonotlite,thepretreatedquartzpowder,slakedCaO,additive,deionizedwater(water-solidratioof30)wereplacedinamagneticallystirredautoclave,andthecorrespondingproductswereobtainedafterincubatingat220℃for0,1,3and6h,respectivelytoexplorethesyntheticprocessofxonotlite.Inthepreparedxonotlitepowder,0,5%,10%,15%and20%(bymass,thesamehereinafter)ofpre-treatedceramicstaplefiberswereadded,andtwosetsofspecimenwiththespecificationsofφ50mm×35mmweremoldedbypressedfiltration.Onesetofspecimenswerenotsintered,andtheothergroupwasfiredat1000℃for2htoexploretheeffectofceramicfiberadditiononthecompressivestrengthbeforeandaftersinteringofxonotlite.TheresultsshowthatC-S-Hgelisfirstsynthesizedinthesynthesisofxonotlite,andthentheC-S-Hgelistransformedtoformtobermlite,atlasttobermlitefullyreactstoproducexonotlite.Theadditionofceramicfiberenhancesthecompressivestrengthofthexonotlitebeforeandaftersintering.Whenthe15%ceramicfiberisadded,thecompressivestrengthisthehighest.Thespecimensbeforeandafterthehightemperaturefiringcontainxonotlitephaseandcalciumsilicatephase,respectively,andthecompressivestrengthofthefiredspecimensishigherthanthatofthegreenones.

简介：裂口Hopkinson压力酒吧(SHPB)技术被用来与不同钢纤维内容决定反应粉末水泥(RPC)的动态力量。有不同厚度的脉搏shapers的二种类型被认为减少high-frequency-oscillation效果并且在某个变丑范围上完成将近经常的紧张率。像水泥的材料的压缩力量是hydrostatic-stress-dependent，这被知道，并且明显的动态力量改进来自两个静水力学的压力和紧张的效果评价。以便区分他们，数字方法被用来在RPC的动态压缩强度上计算静水力学的应力，然后真紧张率效果的贡献被决定。另外，动态力量和RPC的失败模式上的钢纤维的效果被讨论。

简介：PTFE在下面的压缩、封上的特征周期在房间温度卸掉负担被学习以便包括地评估控制阀门的周期的封上表演。卸掉的特征与装载的不同，因此在卸掉并且装载的曲线之间有磁滞现象。压缩磁滞现象是引起封上磁滞现象的主要因素。在它进入相对稳定的区域以前，PTFE的漏率遵循幂定律。最后，压缩、封上的特征上的工作压力的效果被讨论。试验性的结果证明工作压力在压缩变丑上有小效果，但是在漏率上有大影响。

简介：在相等的压缩力量的前提上把臼的力量弄弯上的矿物质混合的影响被调查。三矿物质混合(苍蝇灰，扎根的成粒的强风炉子炉渣和钢炉渣)被使用。在这研究的矿物质混合的增加的数量从22.5%～60%，并且water-to-binder比率从0.34～0.50。与相等的压缩力量，不同的臼能与他们的弯曲力量在如此的一份下降订单被安排：水泥苍蝇灰臼，水泥臼，cement-GGBS臼，和水泥钢炉渣臼。与一样的压缩力量，越高钢炉渣内容和water-to-binder比率，越多降低臼的弯曲力量。然而，矿物质混合内容的效果和水泥苍蝇灰臼和cement-GGBS臼的弯曲力量上的water-to-binder比率是远不引人注目的。

简介：在合金泡沫逐渐地由压缩疲劳导致了的铝(艾尔)的永久剩余紧张与装载周期的增加的数字增加。因而，Al合金泡沫的进步弄短降级由在泡沫的多房间的失败和ratcheting的动态材料表演。在这份报纸，压缩疲劳损坏的Al合金泡沫的动态性质被学习。有各种各样的剩余紧张的横梁标本被周期的压缩压缩应力做。动态弯曲模量和损失因素被使用一个横梁转移功能方法评估。作为结果，当因为击碎在泡沫的弄短的过程期间形成的房间墙的如此的因素的增加的精力驱散，损失因素被改进时，Al合金泡沫的动态弯曲僵硬结果由于损坏被减少。损失因素在疲劳剩余紧张上显示出明白依赖。

简介：Inthispaper,anexperimentalstudyonthesulphateattackresistanceofhigh-performanceconcrete(HPC)withtwodifferentwater-to-binderratios(w/b)undercompressiveloadingispresented.Thesulphateconcentration,compressivestrength,andthemasschangeintheHPCspecimensweredeterminedforimmersioninaNa2SO4solutionoverdifferentdurationsunderexternalcompressiveloadingbyself-regulatingloadingequipment.Theeffectsofthecompressivestress,thew/bratio,andtheNa2SO4solutionconcentrationontheHPCsulphateattackresistanceundercompressiveloadingwereanalysed.TheresultsshowedthattheHPCsulphateattackresistanceundercompressiveloadingwascloselyrelatedtothestresslevel,thew/bratio,andtheNa2SO4solutionconcentration.Applyinga0.3stressratioforthecompressiveloadingorreducingthew/bratioclearlyimprovedtheHPCsulphateattackresistance,whereasapplyinga0.6stressratioforthecompressiveloadingorexposingtheHPCtoamoreconcentratedNa2SO4solutionacceleratedthesulphateattackandHPCdeterioration.

简介：QingdaoJiaozhouBaysubseatunnelisthesecondself-builttunnelinChinawiththedesignedservicelifeover100years.Thedurabilityofliningconcreteareoneofanimportantfactorstodeterminatetheservicelifeoftunnel.Consideringthemainenvironmentalloadsandmechanicalloadsofsubseatunnel,thedurabilitypropertiesofliningconcreteundercombinedactionofcompressiveloadandcarbonationhasbeenstudiedthroughthecriticalcompressiveloadtest,acceleratedcarbonationtest,naturalcarbonationtestandcapillarysuctiontest.Thetestsresultsshowthatcriticalcompressiveloadapparentlyacceleratesthecarbonationanddeterioratestheanti-permeabilityofconcrete.Underthecombinedactionofcriticalcompressiveloadandcarbonation,thedurabilityofliningconcretedecreases.Basedonthecarbonizationlifecriteriaandresearchresults,forthehigh-performanceconcretewithproposedmixratio,thepredictedservicelifeofliningconcreteforJiaozhoubaysubseatunnelisabout80yearswhichfailstoreachtherequiredservicelife.Itisnecessarytoadoptothermeasurementssimultaneouslytoimprovethedurabilityofliningconcrete.

简介：类型和脱臼TA15合金设置的脱臼上的紧张率的效果被调查。试验性的结果证明操作脱臼打变化从$\barc$\barc类型到$\barc$\barc并且$\bar+\barc$\bar有在900的变丑条件下面增加紧张率的一种+\barc类型???0

简介：AmodelofcrosslinkerunbindingisimplementedinahighlycoarsegrainedgranularmodelofF-actincytoskeleton.WeemploythisspecificgranularmodeltostudythemechanismsofthecompressiveresponsesofF-actinnetworks.ItisfoundthatthecompressiveresponseofF-actincytoskeletonhasdependencyonthestrainrate.TheevolutionofdeformationenergyinthenetworkindicatesthatcrosslinkerunbindingeventscaninducetheremodellingofF-actincytoskeletoninresponsetoexternalloadings.TheinternalstressinF-actincytoskeletoncanefficientlydissipatewiththehelpofcrosslinkerunbinding,whichcouldleadtothespontaneousrelaxationoflivingcells.

简介：许多设计材料随紧张率的增加表明他们的压缩强度的动态改进，它在材料模型被包括了在影响和强风负担下面改进材料和结构的回答的数字模拟的可靠性。设计以hydrostatic-stress-sensitive方式表现的材料的一个范围的动态压缩强度上的紧张率效果被调查。hydrostatic-stress-sensitive材料的压缩强度的动态改进可以包括导致惯性的侧面的监禁效果，这被结束，作为一个non-strain-rate因素，它可以极大地提高这些材料的压缩强度。一些实验公式可以基于紧张率在这些hydrostatic-stress-sensitive材料的压缩强度上完成的动态压力紧张大小在预言上，并且这样过高估计结构的抵抗到影响和强风负担，导致保护的结构的非保守的设计。

简介：拉制金属表被合拢与11%变硬工作。这些随后被使用，抵抗焊接构造X类型格子捆绑有0.17的核心亲戚密度的三明治面板。三明治面板在单轴的压缩被测试，为比较，有限元素的方法被采用模仿测量压缩压力紧张曲线。山峰压缩力量比金字塔形的核心三明治的高是32%。变硬工作的X类型格子结构的提高的机械性质主要与弯曲并且工作变硬的低度从直神气的贡献发源，而非二维的蹒跚的节点。

简介：

简介：Themajorobjectiveofthisresearchwastodiscusstheeffectsofloadingrateontheflexural-tensionpropertiesanduniaxialcompressivestrengthofmicro-surfacingmixtureusingthree-pointbendingtestanduniaxialcompressivetestrespectively.Asapreventivemaintenancesurfacetreatmentonasphaltpavement,micro-surfacingwasformedonthebasisoftheISSArecommendationofanoptimummicro-surfacingdesign.Testswereconductedoverawiderangeoftemperaturetoinvestigatethedifferenceofpropertiesfromlowloadingratetoarelativelyhighloadingrate.Three-pointbendingtestwasusedtostudytheflexuralstrength,strainandmodulusofmicro-surfacingmixture,anduniaxialcompressivetestwascarriedouttoobtaintherelationshipbetweenstrengthandtheloadingrateaswellastemperature.Theexperimentalresultsshowedthatflexuralstrengthathighloadingratewaslargerthanthatatlowloadingrate.Theflexuralstrengthdifferencebetweenlowandhighloadingrateenlargedwhenthetemperaturerose.Theflexuralstrainathighloadingrateincreasedcomparedwithresultsofthelowloadingrate.Resultsoftheflexuralmodulusrevealedthatmicro-surfacingmixtureexhibitedbetteranti-crackingcharacteristicatlowtemperaturewhengivenarelativelylowloadingrate.Resultsofuniaxialcompressivetestrevealedthatthestrengthdifferenceofmicro-surfacingamongdifferentloadingratesincreasedwiththeincreaseoftemperature.Thelogarithmrelationshipbetweenthestrengthandloadingrateoverawiderangeoftemperaturewasobtainedtocomparetheexperimentalandpredictedvalues,whichresultinginareasonableconsistency.

简介：Thispaperfocusesontheeffectoftemperatureontheout-of-planecompressivepropertiesandfailuremechanismofcarbonfiber/epoxycompositepyramidaltrusscoressandwichpanels(CF/CPTSP).CF/CPTSPwithnovelreinforcedframesaremanufacturedbythewaterjetcuttingandinterlockingassemblymethodinthispaper.Thetheoreticalanalysisispresentedtopredicttheout-of-planecompressivestiffnessandstrengthofCF/CPTSPatdifferentambienttemperatures.Thetestsofcompositesandwichpanelsareperformedthroughoutthetemperaturerangefrom-90℃to180℃.Goodagreementisfoundbetweentheoreticalpredictionsandexperimentalmeasurements.ExperimentalresultsindicatethatthelowtemperatureincreasesthecompressivestiffnessandstrengthofCF/CPTSP.However,thehightemperaturecausesthedegradationofthecompressivestiffnessandstrength.Meanwhile,theeffectsoftemperatureonthefailuremodeofcompositesandwichpanelsarealsoobserved.

简介：

简介：Thelargesize,crack-freeZr55Cu30Al10Ni5bulkmetallicglass(BMGs)withthediameterof54mmandtheheightof15mmwasbuiltbylasersolidformingadditivemanufacturingtechnology,whosesizeislargerthanthecriticaldiameterbycasting.Themicrostructure,tensileandcompressivedeformationbehaviorsandfracturemorphologyoflasersolidformedZr55Cu30Al10Ni5BMGswereinvestigated.Itisfoundthatthecrystallizationmainlyoccursintheheat-affectedzonesofdepositionlayers,whichconsistofAl5Ni3Zr2,NiZr2,ZrCu,CuZr2phases.Thecontentofamorphousphaseinthedepositisabout63%.Underthecompressiveloading,thedepositpresentsnoplasticitybeforefractureoccurs.Thefractureprocessismainlycontrolledbytheshearstressandthecompressiveshearfractureanglesofabout39.Thecompressivestrengthreaches1452MPa,whichisequivalenttothatofas-CastZr55Cu30Al10Ni5BMGs,andthereexistvein-likepatterns,river-likepatternsandsmoothregionsatthecompressivefractography.Underthetensileloading,thedepositpresentsthebrittlefracturepatternwithoutplasticdeformation.Thefractureprocessexhibitsnormalfracturemodel,andthetensileshearfractureangleofabout90°.Thetensilestrengthisonlyabout609MPa,andthetensilefractographymainlyconsistsofmicro-scaledcoresandvein-likepatterns,dimple-likepatterns,chocolate-likepatternsandsmoothregions.Theresultsfurtherverifiedthefeasibilityandlargepotentialoflaseradditivemanufacturingonfabricationandindustrialapplicationoflarge-scaleBMGsparts.

简介：AdditivelymanufacturedTi-6Al-4Vlatticestructureshavefoundimportantnicheapplications.However,theyoftenshowinsufficientcompressiveductilityorinsufficientstructuralintegrity.Inthisstudy,abatchof45octahedralTi-6Al-4Vlatticestructureswasmanufacturedinthreedifferentstrutdiameters(0.5,1.0,1.5mm)byselectiveelectronbeammelting(SEBM).Theinfluenceofpost-SEBMannealingonthecompressivedeformationcharacteristicsofthelatticestructurewasinvestigated.Theas-builtTi-6AI-4Vlatticesfragmentedwhenthecompressivestrainreached13%-23%dependingonstrutdiameter.Annealingat950℃(Ptransustemperature:995℃)onlyslightlyimprovedthecompressiveductilityofthelatticestructures.However,annealingat1050℃(p-annealing)fundamentallychangedthecompressivedeformationmodeofthelatticestructures.Theresultantcompressivestress-straincurvewasfeaturedbyalongsmoothplateauandnofactureoccurredevenaftersignificantdensificationofthelatticestructurehadtakenplace(>50%ofcompressivestrain).