简介:Wepresentamethodthatcombinesperformance-drivenmethodwithsegmented3Dblendshapemodelstoanimateaface.Firstwepreparekeysampleexamplesandcorrespondingkeytargetexamples.Nextwesegmentthewholefaceintotworegions,foreachregionwereducedimensionalityofsourceexamplesusingPACintoabstractspacewhichisdefinedbytruncatedPCAeigenvectors.Thenforeachexamplewefixthecardinalbasefunction,whichcandeterminetheweightofthetargetexample.Finally,intheanimationstagewecomputetheweightofeachexampleforeachframeandaddtheweighteddisplacementvectorsofeachregiononthegeneralfacemodel.
简介:UsingthesamplesfromeveryMonday'scolumn'theMostPromisingStocksRecommendedbyAnalystsThisWeek'onShanghaiSecuritiesNewsduringtheperiodfromSep.2000toDec.2003,thispaperanalyzestheperformanceofthestocksrecommendedbyanalystsduringthefollowingweek.Firstly,theanalystsareinclinedtorecommendthestockswithbetterperformanceinthelatestweek.Secondly,theportfoliosformedbytheanalystrecommendationshaveremarkablypositiveabnormalreturnsonMonday,whiletheydonotoutperformthemarketfromTuesdaytoFriday,evenhaveremarkablynegativeabnormalreturns.
简介:Intenseresearchandrefinementofthetoolsusedinperformance-basedseismicengineeringhavebeenmade,butthematurityandaccuracyofthesemethodshavenotbeenadequatelyconfirmedwithactualdatafromthefield.Thegapbetweentheassumedcharacteristicsofactualbuildingsystemsandtheiridealizedcounterpartsusedforanalysisiswide.Whentherandomlydistributedflawsinbuildingsastheyexistinurbanareasandtheextremevariabilityofgroundmotionpatternscombine,theconventionalproceduresusedforpushoverordynamicresponsehistoryanalysesseemtofallshortofreconcilingthedifferencesbetweencalculatedandobserveddamage.Foremergencyplanningandlossmodelingpurposes,suchdiscrepanciesarefactorsthatmustbeborneinmind.Tworelevantexamplesareprovidedherein.Theseexamplesdemonstratethatconsensus-basedanalyticalguidelinesalsorequirewell-idealizedbuildingmodelsthatdonotlendthemselvestoreasonablymanageablerepresentationsfromfielddata.Asacorollary,lossmodelingtechniques,e.g.,usedforinsurancepurposes,mustundergofurtherdevelopmentandimprovement.
简介:Background:TheFunctionalMovementScreen(FMS~(TM))hasbecomeincreasinglypopularforidentifyingfunctionallimitationsinbasicfunctionalmovements.ThisexploratoryanddescriptivestudywasundertakentoconfirmfeasibilityofperformingtheFMS~(TM)inolderactiveadults,assessprevalenceofasymmetriesandtoevaluatetherelationshipbetweenfunctionalmovementability,age,physicalactivitylevelsandbodymassindex(BMI).Methods:Thisisanobservationalstudy;97men(n=53)andwomen(n=44)betweentheagesof52and83participated.BMIwascomputedandself-reportedphysicalactivitylevelswereobtained.Subjectsweregroupedbyage(5-yearintervals),BMI(normal,over-weight,andobese)andsex.Eachparticipant'sperformanceontheFMS~(TM)wasdigitallyrecordedforlateranalysis.Results:Theyoungestagegroup(50–54years)scoredhighestinallseventestsandtheoldestagegroup(75+)scoredlowestinmostofthetestscomparedtoallotheragegroups.Thesubjectsinthe'normalweight'groupperformednodifferentthanthosewhowereinthe'overweight'group;bothgroupsperformedbetterthanthe'obese'group.Ofthe97participants54hadatleastoneasymmetry.ThepairwisecorrelationsbetweenthetotalFMS~(TM)scoreandage(r=-0.531),BMI(r=-0.270),andthemeasureofactivitylevel(r=0.287)weresignificant(p<0.01forall).Conclusion:FMS~(TM)scoresdeclinewithincreasedBMI,increasedage,anddecreasedactivitylevel.Thescreenidentifiesrangeofmotion-andstrength-relatedasymmetries.TheFMS~(TM)canbeusedtoassessfunctionallimitationsandasymmetries.FutureresearchshouldevaluateifahighertotalFMS~(TM)scoreisrelatedtofewerfallsorinjuriesintheolderpopulation.
简介:BlocksofMosobamboowereusedasexperimentalmaterialstotestthetoxicityofCuAzpreservativeondecayfungibythelabtestinthispaper.Theresultshowedthatthenaturaldecayresistanceof4-year-oldMaobambooismoderate,andtheresistancetobrownfungiisstrongerthanthattowhitefungi.Theanti-fungipropertiesofCuAzpreservativeattheretentionof3.3kg/m3areequaltothoseofCCA-CandACQ-Battheretentionofabout4.0kg/m3,andobviouslysuperiortothoseoforganicacidspr...
简介:Theeffectsofbiomimeticdesignsoftinefurrowopenersurfaceonequivalentpressureandpressureinthedirectionofmotiononopenersurfaceagainstsoilwerestudiedbyfiniteelementmethod(FEM)simulationandtheeffectsofthesedesignsontoolforceandpowerrequirementswereexaminedexperimentally.Geometricalstructuresofthecuticlesurfacesofdungbeetle(CoprisochusMotschulsky)wereexaminedbystereoscopy.ThestructuresofthecuticlesurfacesandUltraHighMo-lecularWeightPolyethylene(UHMWPE)materialweremodeledonsurfaceoftinefurrowopenerasbiomimeticdesigns.SevenfurrowopenerswereanalyzedinANSYSprogram(aFEMsimulationsoftware).ThebiomimeticfurrowopenersurfaceswithUHMWPEstructureswerefoundtohavelowerequivalentpressureandpressureinthedirectionofmotionascomparedtotheconventionalsurfaceandtothebiomimeticsurfaceswithtexturedsteel-35structures.ItwasfoundthatthetoolforceandpowerwereincreasedwiththecuttingdepthandoperatingspeedandthebiomimeticfurrowopenerwithUHMWPEtubularsectionridgesshowedthelowestresistanceandpowerrequirementagainstsoil..
简介:Manyfactorssuchasouterdiameter,hubratio,bladenumbers,shapeandstaggerangleaffecttheperformanceofsmallcoolingfans.AsmallcoolingfanwassimulatedusingCFDsoftwareforthreebladestaggerangles(30.5°,37.5°,44.5°)andobtainedtheinternalflowfieldandthestaticcharacteristics.Researchindicatedthatthestaggeranglehasanobviouseffectonthestaticcharacteristicsofafan.Forflowratesbelow0.0104m3/s,totalpressureisthegreatestwhenthestaggerangleis37.5°;flowrateshigherthan0.0104m3/s,thetotalpressureisgreatestwhenthestaggerangleis44.5°Forthesameflowrates,thevelocityatinletofpressuresurfaceincreaseswithincreasingstaggerangle,butthechangeofvelocityonthesuctionsurfaceisverysmall.Foronemodel,vorticesandthespeedofrevolutionsurfacesdecreasewithtipclearanceincreasing.Butforotherthreemodels,increasingthestaggerangle,thevortexintensityandspeedofrevolutionsurfacesatsameheighttipclearanceincreases,simultaneously,thepositionofvortexoffsetfromthetopoftherotorbladetothesuctionsurface.
简介:一台新、创新的基础隔离设备基于作者和他们的同事执行的广泛的研究在这篇论文被介绍。设备的一个原型在摇晃的桌子上被造并且试验性地测试了。新基础隔离设备由二个磁盘,有三水平伸臂支撑的上面的增大的一垂直柱体,和记忆合金(SMA)锁的至少三使倾向的形状组成。SMA酒吧的角色是限制在底和上层建筑之间的相对动议,到由他们的超级橡皮的组成的法律并且到保证浪费体力设备重新集中。验证期望的表演,一个原型在正弦曲线下面被造并且测试与不同振幅增加频率的排水量的波浪。建议基础隔离设备的主要特征是为周期的装载,合金的超级橡皮的行为导致宽负担排水量环,这被显示出,在大量体力被浪费的地方。
简介:Thelastdecadeorsohasseenthedevelopmentofrefinedperformance-basedearthquakeengineering(PBEE)approachesthatnowprovideaframeworkforestimationofarangeofimportantdecisionvariables,suchasrepaircosts,repairtimeandnumberofcasualties.ThispaperreviewscurrenttoolsforPBEE,includingthePACTsoftware,andexaminesthepossibilityofextendingtheinnovativedisplacement-basedassessmentapproachasasimplifiedstructuralanalysisoptionforperformanceassessment.Detailsofthedisplacement-baseds+eismicassessmentmethodarereviewedandasimplemeansofquicklyassessingmultiplehazardlevelsisproposed.Furthermore,proposalsforasimpledefinitionofcollapsefragilityandrelationsbetweenequivalentsingle-degree-of-freedomcharacteristicsandmulti-degree-of-freedomstorydriftandflooraccelerationdemandsarediscussed,highlightingneedsforfutureresearch.Toillustratethepotentialofthemethodology,performancemeasuresobtainedfromthesimplifiedmethodarecomparedwiththosecomputedusingtheresultsofincrementaldynamicanalyseswithinthePEERperformance-basedearthquakeengineeringframework,appliedtoabenchmarkbuilding.Thecomparisonillustratesthatthesimplifiedmethodcouldbeaveryeffectiveconceptualseismicdesigntool.Theadvantagesanddisadvantagesofthesimplifiedapproacharediscussedandpotentialimplicationsofadvancedseismicperformanceassessmentsforconceptualseismicdesignarehighlightedthroughexaminationofdifferentcasestudyscenariosincludingdifferentstructuralconfigurations.
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:Ferrocementpanelshavebeenusedinlowcosthousingconstructionindevelopingcountries.Thisstudyfocusesonthesoundtransmissionperformanceofcavityferrocementpanelswithties.Inthisstudy,panelshavebeencastandtestedintransmissionlosssuitespeciallydesignedandconstructedfortestingtheirsoundtransmissionperformanceexperimentally.Themeasuredresultsagreewellwiththetheoreticalmodel.
简介:WereportonthetemporalcontrastperformanceofthePHELIXfacilityinviewoftherequirementsimposedbysolidtargetinteractionexperiments.Therequirementanalysisforthenanosecondandpicosecondtemporalcontrastisderivedfromempiricaldataandsimpletheoreticalmodeling,whiletherealizationshowsthatusinganultrafastopticalparametricamplifierandplasmamirrorsenablesmeetingthisspecification.
简介:Thechemicaloxygen–iodinelaser(COIL)istheshortest-wavelengthhigh-powerchemicallaserthathasbeendemonstrated.Thecharacteristics,suchasgoodatmosphericpropagation,shortwavelengthandexcellenttransmissionthroughopticalfibers,maketheCOILagoodcandidateforhigh-powerlaserapplication.TomodelthecompleteCOILlasinginteraction,athree-dimensionalformulationofthefluiddynamics,speciescontinuityandradiationtransportequationsisnecessary.Thecomputationalefforttocalculatetheflowfieldovertheentirenozzlebankwithagridfineenoughtoresolvetheinjectionholesissolargeastoprecludedoingthecalculation.Theapproachtomodelingchemicallasersthenhasbeentoreducethecomplexityofthemodeltocorrespondtotheavailablecomputationalcapability,addingdetailsascomputingpowerincreased.ThemodelingoflasingintheCOILmediumisproposed,whichiscouplingwiththeeffectsinducedbytransverseinjectionofsecondarygases,non-equilibriumchemicalreactions,nozzletailflowandboundarylayer.ThecoupledsteadysolutionsofthefluiddynamicsandopticsinaCOILcomplexthree-dimensionalcavityflowfieldareobtainedfollowingtheproposal.Themodelingresultsshowthattheseeffectshavesomeinfluenceonthelasingproperties.Afeasiblemethodologyandatheoreticaltoolareofferedtopredictthebeamqualityforlarge-scaleCOILdevices.