简介：Background:Childrenareaffectedbydisordersthathaveanimpactontherespiratorymuscles.Inspiratorymusclefunctioncanbeassessedbymeansofthenoninvasivetension–timeindexoftheinspiratorymuscles(TTImus).OurobjectivesweretoidentifythedeterminantsofTTImusinhealthychildrenandtoreportnormalvaluesofTTImusinthispopulation.Methods:Wemeasuredweight,height,upperarmmusclearea(UAMA),andTTImusin96childrenaged6–18years.Thelevelandfrequencyofaerobicactivitywasassessedbyquestionnaire.Results:TTImuswassignificantlylowerinmalesubjects(0.095±0.038,mean±SD)comparedwithfemalesubjects(0.126±0.056)(p=0.002).TTImuswassignificantlylowerinregularlyexercising(0.093±0.040)comparedwithnonexercisingsubjects(0.130±0.053)(p<0.001).TTImuswassignificantlynegativelyrelatedtoage(r=-0.239,p=0.019),weight(r=-0.214,p=0.037),height(r=-0.355,p<0.001),andUAMA(r=-0.222,p=0.030).MultivariatelogisticregressionanalysisrevealedthatheightandaerobicexerciseweresignificantlyrelatedtoTTImusindependentlyofage,weight,andUAMA.ThepredictiveregressionequationforTTImusinmalesubjectswasTTImus=0.228-0.001×height(cm),andinfemalesubjectsitwasTTImus=0.320-0.001×height(cm).Conclusion:Gender,age,anthropometry,skeletalmuscularity,andaerobicexercisearesignificantlyassociatedwithindicesofinspiratorymusclefunctioninchildren.NormalvaluesofTTImusinhealthychildrenarereported.

简介：Mathergavethenecessaryandsufficientconditionsforthefinitedeterminacys-moothfunctiongermswithnomorethancodimension4.Thetheoremisveryeffectiveondetermininglowcodimensionsmoothfunctiongerms.Inthispaper,theconceptofrightequivalentforsmoothfunctiongermsringgeneratedbytwoidealsfinitelyisdefined.Thecontainmentrelationshipsoffunctiongermsstillsatisfyfinitek-determinacyundersufficientlysmalldisturbancewhicharediscussedinorbittangentspaces.Furthermore,themethodsinjudgingtherightequivalencyofArnoldfunctionfamilywithcodimension5arepresented.

简介：Aneuralnetwork(NN)isapowerfultoolforapproximatingboundedcontinuousfunctionsinmachinelearning.TheNNprovidesaframeworkfornumericallysolvingordinarydifferentialequations(ODEs)andpartialdifferentialequations(PDEs)combinedwiththeautomaticdifferentiation(AD)technique.Inthiswork,weexploretheuseofNNforthefunctionapproximationandproposeauniversalsolverforODEsandPDEs.ThesolveristestedforinitialvalueproblemsandboundaryvalueproblemsofODEs,andtheresultsexhibithighaccuracyfornotonlytheunknownfunctionsbutalsotheirderivatives.ThesamestrategycanbeusedtoconstructaPDEsolverbasedoncollocationpointsinsteadofamesh,whichistestedwiththeBurgersequationandtheheatequation(i.e.,theLaplaceequation).

简介：ThedissipationfunctioninturbulentplanePoiseuilleflows(PPFs)andplaneCouetteflows(PCFs)subjecttospanwiserotationsisanalyzed.Itisfoundthat,inthePCFswithoutsystemrotations,themeanpartisconstantwhilethefluctuationpartfollowsalogarithmiclaw,resultinginasimilarlogarithmicskinfrictionlawasPPFs.However,iftheflowsystemrotatesinthespanwisedirection,noobviousdependenceontherotationnumbercanbeevaluated.InthePPFswithrotations,thedissipationfunctionshowsanincreasewiththerotationnumber,whileinthePCFswithrotations,whentherotationnumberincreases,thedissipationfunctionfirstdecreasesandthenincreases.

简介：Environmentalloadistheprimaryfactorinthedesignofoffshoreengineeringstructuresandoceancurrentistheprincipalenvironmentalloadthatcausesunderwaterstructuralfailure.Incomputationalanalysis,thecalculationofcurrentloadismainlybasedonthecurrentprofile.Thecurrentprofilemodel,whichisbasedonastructuralfailurecriterion,isconducivetodecreasingtheuncertaintyofthecurrentload.Inthisstudy,weusedprototypemonitoringdataandtheempiricalorthogonalfunction(EOF)methodtoinvestigatethecurrentprofileintheSouthChinaSeaanditscorrelationwiththedesignofunderwaterstructuralstrengthandthedynamicdesignoffatigue.Theunderwaterstructuralstrengthdesigntakesintoaccountthesizeofthestructureandtheservicewaterdepth.Weproposeprofilesfortheoverallandlocaldesignsusingtheinversefirst-orderreliabilitymethod(IFORM).Weextractedthecharacteristicprofilecurrent(CPC)ofthemonitoredseaareatosolvedynamicdesignproblemssuchasvortex-inducedvibration(VIV).WeusedrandomsamplingtoverifythefeasibilityofusingtheEOFmethodtocalculatetheCPCfromthecurrentdataandidentifiedthemainproblemsassociatedwithusingtheCPC,whichdeservecloseattentioninVIVdesign.Ourresearchconclusionsprovidedirectreferencesfordeterminingcurrentloadinthisseaarea.Thisanalysismethodcanalsobeusedintheanalysisofotherseaareasorfieldvariables.

简介：Afacilegreenlow-costcontrollablehydrothermal-thermalconversion(HTC)processfortheuniformhighaspectratioCaSiO3nanowireshasbeendevelopedusingabundantCaCl2·2H2OandNa2SiO3·9H2Oasrawmaterialswithoutanyorganicadditive.Thenanowiresexhibitedatransparentcharacteristicfromtheultraviolettovisibleregion,andtheCaSiO3:1.2%Tb3+nanophosphorswithwellpreserved1DmorphologydemonstratedstronggreenluminescencewithCIEcoordinatesof(x=0.3144,y=0.5912).Thepresentworkdefinitelyrevealsthenanowiresasapromisingstructureandfunctionintegratedhostcandidateforgreen-emittingluminescentmaterialsinlightdisplaysystemsandoptoelectronicdevices.