简介：WithtechnicalassistancefromINBARandtheResearchInstituteofWoodIndustryoftheChineseAcademyofForestry,theconstructionofthePingbianPrimarySchoolwascompletedin2004,wherebambooplywoodpanelsandlaminatedbeamswereusedfortherooftrusses,sheathingboardsandwallpanels.Thisisthefirsttimethatbamboo-basedpanelsareusedforstructuralapplications.

简介：Thispaperpresentsalaboratorystudyonbridgepierprotectionwithsurfaceguidepanels(SGP)inclear-waterexperiments.TheSGPisinstalledbypiercingasetoftwoverticalpanelspartiallyintothewater,withsomeinteriorangleandleadingopening,settingatadistanceaheadoftheprotectedpier.ThesuitableinstallationoftheSGPcaneffectivelyadjusttheflowpatterntoreducethedownflowmotionandthehorseshoevortexaheadofthepier.WeconsidersomedominantfactorstosetupSGPforpierprotection,includingtheinteriorangleθ,leadingopeningOw,distancebetweenpanelandpierL,submergeddepthofpanelPd,pierdiameterDandwaterdepthH.Afterevaluationoftheseparametersthroughlaboratorytests,theoptimalsetupconditionsofθ=60o,Ow/D=0.1～0.2,L/D=2～2.5andPd/H=0.7aredetermined.Undertheseconditions,theusageofSGPleadstoabestperformanceondecrementofthemaximumscourdepthatpierupto90%withignorablesideeffectsontheSGPscour.

简介：Ferrocementpanelshavebeenusedinlowcosthousingconstructionindevelopingcountries.Thisstudyfocusesonthesoundtransmissionperformanceofcavityferrocementpanelswithties.Inthisstudy,panelshavebeencastandtestedintransmissionlosssuitespeciallydesignedandconstructedfortestingtheirsoundtransmissionperformanceexperimentally.Themeasuredresultsagreewellwiththetheoreticalmodel.

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简介：Instrongsolarlight,siliconsolarpanelscanheatupby70℃and,thereby,looseapproximatelyonethirdoftheirefficiencyforelectricitygeneration.Leafstructuresofplantsontheotherhand,havedevelopedaseriesoftechnologicaladaptations,whichallowthemtolimittheirtemperatureto40-45℃infullsunlight,evenifwaterevaporationissuppressed.Thisisaccomplishedbyseveralstrategiessuchaslimitationofleafsize,optimizationofaerodynamicsinwind,limitationofabsorbedsolarenergyonlytotheusefulfractionofradiationandbyefficientthermalemission.Opticalandinfraredthermographicmeasurementsunderasolarsimulatorandinastreamingchannelwereusedtoinvestigatethecorrespondingpropertiesofleavesandtoidentifysuitablebionicmodelsystems.ExperimentsstartedwiththeserratedstructureofordinarygreenleavesdistributedovertypicaltwigstructuresandfinallyidentifiedtheAustralianpalmtreeLicualaramsayiasamoreusefulbionicmodel.Itcombinesalargeareaforsolarenergyharvestingwithoptimizedaerodynamicpropertiesforcoolingandisabletorestructureitselfasaprotectionagainststrongwinds.Thebionicmodels,whichwereconstructedandbuilt,areanalyzedanddiscussed.

简介：Slipanddeformationofconcretesandwichpanelsunderuniformlydistributedloadsisconcerned.Theeffectofsliponthedeformationofconcretesandwichpanelsarestudied,andtheanalyticalexpressionsofslipanddeformationforconcretesandwichpanelsisobtained.Theseformulaecandescribetheslipdistributionandaccountforitseffectondeformation.Inordertorestricttheboundofformula,theformulaofcrackmomentisobtained.Theresultsoftheoreticalcalculationarecomparedwiththoseoftestsandfiniteelementmethods.Thecomparisonshowsthattheresultsoftheoreticalcalculationareinaccordwiththoseoftestsandfiniteelementmethods.Sothetheoreticalcalculationcanbeusedtocalculateslipanddeformationofconcretesandwichpanelsinpracticalprojects.

简介：焊接顺序在通常在轮船使用的大直角地使硬的面板的失真模式上有重要效果并且近海结构。这些变丑不利地影响邻近的面板的随后的移动舞台和排列。它可以也导致结构的正直的损失。这些面板首先受不了尖、弄弯的失真。失真的程度取决于象焊接焊接的速度，板厚度，焊接电流，电压，当焊接时，用于这个工作的抑制，热历史以及顺序那样的几个参数。焊接和FE模型的试验性的确认的数字建模为热历史和产生失真的评价被执行了。在现在的工作，一个FE模型为学习在直角地使硬的板面板的制造在失真模式和它的大小上焊接顺序的效果被开发了。

简介：Theconceptofcombiningmetallichoneycombwithfoldedthinmetallicsheets(corrugation)toconstructanovelcoretypeforlightweightsandwichstructuresisproposed.Thehoneycomb–corrugationhybridcoreismanufacturedbyfillingtheintersticesofaluminumcorrugationswithprecision-cuttrapezoidalaluminumhoneycombblocks,bondedtogetherusingepoxyglue.Theperformanceofsuchhybrid-coredsandwichpanelssubjectedtoout-of-planecompression,transverseshear,andthree-pointbendingisinvestigated,bothexperimentallyandnumerically.Thestrengthandenergyabsorptionofthesandwicharedramaticallyenhanced,comparedtothoseofasandwichwitheitheremptycorrugationorhoneycombcore.Theenhancementisinducedbythebeneficialinteractioneffectsofhoneycombblocksandfoldedpanelsonimprovedbucklingresistanceaswellasalteredcrushingmodesatlargeplasticdeformation.Thepresentapproachprovidesaneffectivemethodtofurtherimprovethemechanicalpropertiesofconventionalhoneycomb-coredsandwichconstructionswithlowrelativedensities.

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简介：Thespacecraftwithmultistagesolarpanelshavenonlinearcouplingbetweenattitudesofcentralbodyandsolarpanels,especiallytherotationofcentralbodyisconsideredinspace.Thedynamicsmodelisbasedfordynamicsanalysisandcontrol,andthemultistagesolarpanelsmeansthedynamicsmodelingwillbeverycomplex.Inthisresearch,theLiegroupvariationalintegratormethodisintroduced,andthedynamicsmodelofspacecraftwithsolarpanelsthatconnectstogetherbyflexiblejointsisbuilt.Themostobviouscharacterofthismethodisthattheattitudesofcentralbodyandsolarpanelsarealldescribedbythree-dimensionalattitudematrix.Thedynamicsmodelsofspacecraftwithoneandthreesolarpanelsareestablishedandsimulated.ThestudyshowsLiegroupvariationalintegratormethodavoidsparameterscouplingandeffectivelyreducesdifficultyofmodeling.TheobtainedcontinuousdynamicsmodelbasedonLiegroupisasetofordinarydifferentialequationsandequivalentwithtraditionaldynamicsmodelthatoffersabasisforthegeometrycontrol.

简介：Thermaltransportinahighlyporousmetallicwire-wovenbulkKagome(WBK)isnumericallyandanalyticallymodeled.Basedontopologysimilarityanduponintroducinganelongationparameterinthermaltortuosity,anidealizedKagomewithnon-twistedstrutsisemployed.SpecialfocusisplaceduponquantifyingtheeffectoftopologicalanisotropyofWBKuponitseffectiveconductivityItisdemonstratedthattheeffectiveconductivityreduceslinearlyastheporosityincreases,andtheextentofthereductionissignificantlydependentontheorientationofWBK.ThegoverningphysicalmechanismofanisotropicthermatransportinWBKisfoundtobetheanisotropicthermaltortuositycausedbytheintrinsicanisotropictopologyofWBK.

简介：VBHF(可变空白的持有者力量)优化策略被采用决定最佳的时间变量和空间变量的BHF轨道，瞄准与铝合金表改进汽车面板的formability。策略基于适应模拟被实现模拟周围在单人赛为Numisheet'05甲板盖的每个分割的文件夹计算批评起皱BHF。在最佳的VBHF和经常的BHF下面的印上的部分的厚度比较证明分别地，四节的变化被70%，44%，64%和61%减少它在厚度分发和变化控制显示重要改进。通过种类路径比较的调查揭示formability改进的基本原因。学习与铝合金表证明新VBHF优化策略的适用性到复杂部分。

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简介：Thethermalprotectionperformanceofsuperalloyhoneycombstructureinhigh-temperatureenvironmentsareimportantforthermalprotectiondesignofhigh-speedaircrafts.Byusingaself-developedtransientaerodynamicthermalsimulationsystem,thethermalprotectionperformanceofsuperalloyhoneycombpanelwastestedinthispaperatdifferenttransientheatingratesrangingfrom5℃/sto30℃/s,withthemaximuminstantaneoustemperaturereaching950℃.Furthermore,thethermalprotectionperformanceofsuperalloyhoneycombstructureundersimulatedthermalenvironmentswascomputedfordifferenthighheatingratesbyusing3Dfiniteelementmethod,andacomparisonbetweencalculationalandexperimentalresultswascarriedout.Theresultsofthisresearchprovideanimportantreferenceforthedesignofthermalprotectionsystemscomprisingsuperalloyhoneycombpanel.

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

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简介：(Y,Gd)BxV1-xO4-x:Eu3+phosphorswerepreparedbysolidstatereaction.Theredemissioncolorpurityof(Y,Gd)BxV1-xO4-x:Eu3+phosphorismuchbetterthanthatoftherecentwidely-usedcommercialredemittingphosphor(Y,Gd)BO3:Eu3+anditsrelativeemissionintensityis84%ofthecommercialphosphor(Y,Gd)BO3:Eu3+.Itisexpectedthat(Y,Gd)BxV1-xO4:Eu3+phosphorwillbeapromisingcandidateforPDP(plasmadisplaypanels)application.