简介:<正>Background:Muscularstrengthcanbeconceptuallydeterminedbytwocomponents:muscleactivationandsize.Muscleactivationbythecentralnervoussystemcanbemeasuredbysurfaceelectromyography(sEMG).Muscularsizereflectstheamountofcontractileproteinwithinaskeletalmuscleandcanbeestimatedbyanthropometricmeasurements.Thepurposeofthisstudywastodeterminetherelativecontributionsofsizeparametersandmuscleactivationtothepredictionofmaximalvoluntaryisometricelbowflexionstrength.Methods:Aseriesofanthropometricmeasurementsweretakenfrom96participants.Torqueandroot-mean-square(RMS)ofthesEMGfromthebicepsbrachiiwereaveragedacrossthreemaximalvoluntaryisometriccontractions.AmultiplelinearregressionanalysiswasperformedbasedonaPearson’scorrelationmatrix.Results:Bodyweight(BW)accountedfor39.1%and27.3%inmalesandfemales,respectively,andwasthestrongestpredictorofstrengthformales.Forearmlength(L3)wasthestrongestpredictorofstrengthinfemales(partialR~2=0.391).Elbowcircumference(ELB)accountedforasignificant(p<0.05)amountofvarianceinmalesbutnotfemales.TheadditionofsEMGRMSasathirdvariableaccountedforanaverageof10.1%ofthevarianceexcludingtheequationofBWandL3infemales.ThestrongestpredictionequationincludedBW,L3,andELBaccountingfor55.6%and58.5%ofthevarianceinmalesandfemales,respectively.Conclusion:Anthropometricsprovideastrongpredictionequationfortheestimationofisometricelbowflexionstrength.Muscleactivation,asmeasuredbysEMGactivity,accountedforasignificant(p<0.05)amountofvarianceinmostpredictionequations,however,itscontributionwascomparabletoanadditionalanthropometricvariable.
简介:Inrecentyears,accordingtotheneedofintelligentvideosurveillancesystemincreasingrapidlyinmetropolitancities,adesignbasedonS3C2440microprocessorandembeddedLinuxoperatingsystemisadoptedforreal-timevideotargettracking.However,itisverychallengingasembeddedsystemsusuallyaffordlimitedprocessingpowerandlimitedresources.Therefore,toaddressthisproblem,areal-timetrackingalgorithmusingmulti-featuresbasedoncompressivesensingisproposedandimplemented.Thealgorithmusesmultiplematrixastheprojectionmatrixofthecompressivesensingandthecompresseddateasthemultiplefeaturestoextractusefulinformationneededbytrackingprocess.FunctionsandlibrariesinOpenCVwhichweredevelopedbyIntelCorporationareutilizedforbuildingthetrackingalgorithms.Itistestedwithvariantvideosequencesandtheresultsshowthatthealgorithmachievesstabletrackingforthetargetmovedofthelightchanged.
简介:Reachabilityisakeycriterioninmaintenancedesign,andhumanarmisthemainobjectinreachabilityanalysis.Thehumanarm'sDOFisreduced,andapplyingmilitarystandardsandhumanphysiologicalconstraints,thesimplifiedarmmodelof7-DOFusingD-Hmethodisbuiltup.ParticleSwarmOptimization(PSO)isusedtoacquiretheshoulder,armandhandposturewithadaptivefitnessfunction.Adetailedreachabilityanalysisisaccomplishedfordisassemblingtheboltsfromcrankshaftisgivenasanexampletovalidatethefeasibilityofusingreachabilityanalysisonmaintenancedesign.
简介:AbstractBackground:Transoral vestibular approach thyroidectomy using robotic system has advantages with articulating instrumentation. Transoral robotic thyroidectomy (TORT) can be done either using just two robot arms for instruments and an extra one for the endoscopic camera, or using three robot arms for instruments (third arm through axila) and an additional arm for the camera.Pros of additional axillary arm for TORT:The 4th arm through an additional axillary port is mainly responsible for a counter-traction of strap muscles and thyroid tissue. The additional axillary port tract is also an excellent passage for the specimen removal with lower risk of disruption or fragmentation. Ultimately, these merits from the additional axillary arm allows TORT to be performed safely in a wide range of patient groups.Cons of additional axillary arm for TORT:One of the issue with the additional axillary arm in TORT is that it leaves a cutaneous scar. Another issue to consider is the cost. In some places, robotic surgery operation fee varies with the number of arms used during the operation. Retraction of strap muscles through subcutaneous stitches applied after establishing the working space may make up for the lack of counter-traction.Conclusion:TORT can be done safely with or without the transaxillary arm and surgeon may consider pros and cons based on multiple factors.
简介:摘要:综合实践课程,是一门新型学科,其性质是能够培养学生综合素质的跨学科实践型课程,强调学生的亲历、体验、感悟和理解,是一门具有严密的知识体系和技能体系的学科。综合实践课程的内核更加突出了以学生为主体的核心理念,践行实践育人,在活动中修炼学生的核心素养。“人字结构理论”,其根本就是指思想道德、身体健康、科学文化、心理素质等各个方面,包含了有形和无形的整体结构,且能够统筹兼顾,实现多方面的协调发展,用“人字结构理论”诠释综合实践课程内核,不仅能够突出综合实践课程的教育目标和育人价值,更重要的是能够充分把握综合实践课程的本质特征,助力学生成为德智体美全面发展的社会主义事业的建设者和接班人。