简介：IntheirrecentpapersintheJournalofSportandHealthScienceonhamstringinjuriesinsprinting,~(1,2)andtheircorrespondingcommentariesoneachother'sresearch,3,4Yuetal.andLiuetal.proposeddifferentviewsofthemechanismsofmuscleinjuriesingeneral,andhamstringinjuriesinsprintingspecifically.WhileYuetal.~(1,3)arguedthatmuscleinjuriesareprimarily,ifnotexclusively,causedbymusclestrainmagnitudeineccentriccontractions,andthushamstringinjuriesoccurprimarilyat

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简介：在现在的纸，我们使用控制功能在Menger空格定义概括收缩并且获得一条唯一的固定的点定理。工作与为在控制函数和相关的固定的点结果的帮助下开发概率的收缩的研究一致。我们把一个例子给了我们的定理适用。一些推论也被讨论。关键词Menger空间-固定的点-(?，蠄1，蠄2)收缩AMS(2010)题目分类54H25

简介：这份报纸论述有低引擎排水量的一台V6马达的主要部件的收缩怎么为在极端低温度下面的冷开始的阶段是坚定的。内燃机部件有复杂几何学并且获得热收缩在研究，使用有限元素分析的方法。热收缩的现象在极端低温度为冷开始的状况被学习，知道一台内燃机的冷开始的阶段是决定动人的旋转、翻译的部分穿生活的主要因素。检查清理的合适的选择是特别地重要的，作为它的不恰当的价值的使用导致引擎组部件的快速的操作破坏。为机轴轴承的热清理获得的结果算术地被建模，关系能被用于计算清理。数学模型为在不同软件工具中实现也是有用的。

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简介：Background：Theisometricsteady-statefollowingactivelengtheningisassociatedwithgreatertorqueproductionandloweractivation,asmeasuredbyelectromyographicactivity（EMG）,incomparisonwithapurelyisometriccontraction（ISO）atthesamejointangle.Thisphenomenonistermedresidualforceenhancement（RFE）.WhiletherehasbeenagreatdealofresearchinvestigatingthebasicmechanismsofRFE,littleworkhasbeenperformedtounderstandtheeverydayrelevanceofRFE.ThepurposeofthisstudywastoinvestigatewhetherneuromuscularcontrolstrategiesdifferbetweenISOandRFEbymeasuringtorquesteadinessofthehumanankleplantarflexors.Methods：FollowingISOmaximalvoluntarycontractionsin12males（25±4years）,anactivelengtheningcontractionwasperformedat15°/sovera30°ankleexcursion,endingatthesamejointangleasISO（5°dorsiflexion;RFE）.SurfaceEMGofthetibialisanteriorandsoleusmuscleswasrecordedduringalltasks.Torquesteadinesswasdeterminedasthestandarddeviation（SD）andcoefficientofvariation（CV）ofthetorquetraceintheISOandRFEconditionduringactivation-matching（20%and60%integratedEMG）andtorque-matching（20%and60%maximalvoluntarycontraction）experiments.Two-tailed,pairedttestswereused,withinsubjects,todeterminethepresenceofRFE/activationreduction（AR）andwhethertherewasadifferenceintorquesteadinessbetweenISOandRFEconditions.Results：Duringthemaximalandsubmaximalconditions,therewas5%-9%RFEwitha9%-11%AR（p〈0.05）,respectively,withnodifferenceinantagonistcoactivationbetweenRFEandISO（p〉0.05）.TherewerenodifferencesinSDandCVofthetorquetraceforthe20%and60%activation-matchingorthe60%andmaximaltorque-matchingtrialsineithertheRFEorISOcondition（p〉0.05）.Duringthe20%torquematchingtrial,therewere～37%highervaluesforSDandCVintheRFEascomparedwiththeISOcondition（p〈0.05）.Asignificantmoderate-to-strongnegativerelatio

简介：Neuromuscularactivityissuppressedduringmaximaleccentric（ECC）musclecontractioninuntrainedsubjectsowingtoattenuatedlevelsofcentralactivationandreducedspinalmotorneuron（MN）excitabilityindicatedbyreducedelectromyographysignalamplitude,diminishedevokedH-reflexresponses,increasedautogenicMNinhibition,anddecreasedexcitabilityindescendingcorticospinalmotorpathways.MaximumECCmuscleforcerecordedduringmaximalvoluntarycontractioncanbeincreasedbysuperimposedelectricalmusclestimulationonlyinuntrainedindividualsandnotintrainedstrengthathletes,indicatingthatthesuppressioninMNactivationismodifiablebyresistancetraining.Insupportofthisnotion,maximumECCmusclestrengthcanbeincreasedbyuseofheavy-loadresistancetrainingowingtoaremovedordiminishedsuppressioninneuromuscularactivity.Prolonged（weekstomonths）ofheavy-loadresistancetrainingresultsinincreasedH-reflexandV-waveresponsesduringmaximalECCmuscleactionsalongwithmarkedgainsinmaximalECCmusclestrength,indicatingincreasedexcitabilityofspinalMNs,decreasedpresynapticand/orpostsynapticMNinhibition,andelevateddescendingmotordrive.Notably,theuseofsupramaximalECCresistancetrainingcanleadtoselectivelyelevatedV-waveresponsesduringmaximalECCcontraction,demonstratingthatadaptivechangesinspinalcircuitryfunctionand/orgainsindescendingmotordrivecanbeachievedduringmaximalECCcontractioninresponsetoheavy-loadresistancetraining.

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简介：Inthispaper,weintroducegeneralizedcyclicC-contractionsthroughpnumberofsubsetsofaprobabilisticmetricspaceandestablishtwofixedpointresultsforsuchcontractions.InourfirsttheoremweusetheHadzictypet-norm.InournexttheoremweuseLukasiewiczt-norm.OurresultsgeneralizetheresultsofChoudhuryandBhandari[11].Acontrolfunction[3]hasbeenutilizedinoursecondtheorem.Theresultsareillustratedwithsomeexamples.

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简介：Prematureventricularcontraction(PVC)isthemostfrequentarrhythmiaencounteredinclinicalpractice.PVCmayoccurinhealthsubjects,whichisnotimminentlylife-threateningbutmayrequiretherapiestopreventfurtherproblems.So,thetimelyPVCrecognitionbecomesveryimportantfortheanalysisofelectrocardiogram(ECG),especiallyfortheremoteECGmonitoringusingmobilephones.Inthispaper,aconstructionmethodofpersonalizedECGtemplateandaPVCrecognitionmethodbasedontemplatematchingwerestudied.Firstly,weselected43ECGrecordingsfromtheMIT-BIHarrhythmiadatabase.Allrecordingsweredividedintotwodatasets(DS1fortrainingandDS2fortesting)andeachdatasetapproximatelycontainedthesameproportionofPVCbeats.Subsequently,foreachrecording(30min)inDS1,thefirst5minrecordingswereusedtoconstructthepersonalizedECGtemplateandthelast25minrecordingswereusedfortheR-wavepeaksdetectionandPVCrecognition,wherethetemplatematchingmethodwereused.ThevalidityoftheproposedmethodswastestedusingDS2.Theresultsshowedthat:1)highbeatdetectionaccuracywasachievedforbothPVCbeatsandnon-PVCbeats;2)thesensitivityandspecificityofPVCrecognitionwere99.11%and99.96%forthefirst5minrecordingsrespectively,99.17%and99.43%forthelast25minrecordingsrespectively.Alltheproposedmethodscanbereal-timeperformed,whichshowapromisingprospectfortheapplicationofECGmobilephones.

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简介：Theuterinetetaniccontractionanduterinearterybloodflowreductionarepossiblereasonsforprimarydysmenorrhea（PD）.Inthepresentstudy,weaimedtoevaluatetheuterinerelaxanteffectandtheinfluenceonuterinearterybloodvelocityofGe-GenDecoction（GGD）,awell-knownChineseherbalformula.InfemaleICRmice,uterinecontractionwasinducedbyoxytocinexposurefollowingestradiolbenzoatepretreatment,andtheuterinearterybloodvelocitywasdetectedbyDopplerultrasound.HistopathologicalexaminationoftheuterinetissuesampleswereperformedbyH&Estaining.Exvivostudiesdemonstratedthatoxytocin,posteriorpituitary,oracetylcholineinducedcontractionsinisolatedmouseuterus.GGDinhibitedbothspontaneousandstimulatedcontractions.InvivostudydemonstratedthatGGDsignificantlyreducedoxytocin-inducedwrithingresponseswithamaximalinhibitionof87%.FurtherstudydemonstratedthatGGDnormalizedoxytocin-inducedabnormalitiesofprostaglandinsF2alpha(PGF2α)andCa2+inmice.Inaddition,injectionofoxytocininducedadecreaseinuterinearterybloodflowvelocity.PretreatmentwithGGDreversedtheoxytocinresponseonbloodflowvelocity.HistopathologicalexaminationshowedpretreatmentwithGGDalleviatedinflammationandedemaintheuteruswhencomparedwiththemodelgroup.BothexvivoandinvivoresultsindicatedthatGGDpossessedasignificantspasmolyticeffectonuterinetetaniccontractionaswellasimprovementonuterinearterybloodvelocitywhichmayinvolvePGF2αandCa2+signaling,suggestingthatGGDmayhaveaclinicpotentialinPDtherapy.

简介：Aseriesoftitlecompoundsaswellastheirprecursorsweresynthesizedbyprecursorroute.TheirPXRDpatternswerecharacterizedwithZrW2O8orZrMo2O8modelbyRietveldmethod.Thethermalcontractionsofthecompoundsweredeterminedaccordingtothevariable-temperaturePXRDdataandNTEcoefficientswerepresented.Thetwo-phasemixtureofZrW0.4Mo1.6O8wasalsoanalyzedindividually.

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