简介:Overthedecade,ChineseBiomedicalEngineeringhasmaderemarkleprogressandaccumulatedmuchexperience.Animportantproblemfacingusishowtotaketheroadaheadofus.Firstofall,weshouldchangeourconventionalconceptandheadforthenewroad.Aboutthreeyearsago,wemadeaspecialreviewontheconnotationandchar-acteristicsofbiomedicalengineeringandpointedoutthatBiomedicalEngineeringwas
简介:Thereisalonghistoryoffailureininternationalcooperationinmedicalequip-menttechnology.IFMBEandJSMEBEhavemadegreateffortstoremedythesitua-tion.Recently,JSMEBEisaskedbyJapaneseGovermenttoprovideaguidelinefortheactivities.Acommitteewasformedfor3years,andasaresultofextensivesur-veystudiesbyquestionaries,interviewsandcorrespondences,thefinalguidelinewaspublished(inJapanese)March1993.Itisavailableonrequest,andEnglishtransla-
简介:Thispaperdevelopesatemperaturecontrolsysteminordertocarryoutarealtimeandcontinuousobservationonlivingcellsunderthemicroscope.Inthissystem,transparentindiumtinoxid(ITO)conductivefilmwasusedasaheater,temperaturewasmeasuredbythetemperaturedependenceofresistancebehavioroftheITOfilm,C8051F340single-clupwasusedasthecontrolhardwarecore,andthemodifiedPIDalgorithmandpulsewidthmodulation(PWM)wereadoptedasthekeycontrolsoftwareprograms.Thetemperaturesystemhadasimplestructurewithoutaddedtemperaturesensor,anuniformtemperaturedistributionwithin±1℃ontheITOfilmsurfaceandtemperaturecontrolprecisionof±0.2℃couldbeobtained.ThesystemcouldmaintainagoodgrowthstateforBHK-21livingcellunderthemicroscopefor48h.
简介:Basedonthethermaltomographytechnology,thisthesistriestocalculatequantityanddistributionofheatsourceinvivofrombodysurfacetemperature.AsuperpositiontemperatureimageofanumberofpointheatsourcesissurfacefittedtogettheQofheatsources(informationofcancercells)quantitatively.Theresultcanreflectthediseaseareainformationbecausecancercell'sQvalueismuchhigherthanthatofnormalcell.Thisapplicationisanewtryinthediagnosisofbreastcancer,whichhasanimportantvalueontheearlydetectionanddiagnosisofdiseasesource.
简介:Thetechniqueofcomputersimulationsisaveryefficientmethodininvestigatingmechanismsofmanydiseases.Thispaperreviewshowthesimulationsofthehumanheartstartedasasimplemathematicalmodelsinthepastanddevelopedtothepointwheregeneticinformationisneededtodosuitableworklikefindingoutnewmedicamentsagainstheartdiseases.AlsotheInfluenceofthedevelopmentofcomputerperformanceinthefutureaswellasthedatapresentationisdescribed.
简介:Recurrentepisodesofperitonitiswiththesameorganismculturedatthecatheterexitsitesuggestthatearlytunnelcolonizationisassociatedwithatransferoftheseorganismsthroughthecathetertunneldirectlyfromtheskinintotheperi-tonealcavity.Inthiscircumstancethecatheterhasfailedinitsfundamentaldesigntoestablishandmaintainabacteriologicalbarrier.AthreepartstudywasconductedusingtheMoncrief-PopovichCatheterandImplantationTechnique.Thefirstpartof
简介:Developmentofsensorneedlesforchinesetraditionalmedicineisalongtermre-searchprojectinouruniversity.Now,temperature.PH,PO2andpotentialsensorneedleshavebeendeveloped.Thesenewelementsarederivedfromthecombinationbetweenasensorandanac-tuator.Thedesignprinciple,functionalmaterials,fabricationtechnic,calibrationmethodandclin-icalapplicationoftheseneedlesarereportedinthispaper.
简介:ChinesescholarshaverealizedtheimportanceofArtificialOrganresearch.TheScienceandTechonlogyCommitteeofChinasetupaspecialworkinggroupin1978inordertodeveloptheresearchprojectsofartificialorgans.TheChineseSocietyofBiomedicalEngineeringestablishedtheArtificialOrgansSocietyandsince1982itholdsconferenceseverythreeyears.
简介:Inthispaper,weproposeamethodtoimproveanti-radiationcapabilitybycoatingheavymetalX-rayprotectionglasswithcompoundphotoniccrystallayers,basedontheuniquepropertyofphotoniccrystalthatlightcannotbepropagatedwithintherangeofbandgaps.Usingtheplanewaveexpansionmethod,wemadeatheoreticalstudyofparametersaffectingthebandgapstructuresofone-dimensionalphotoniccrystals.Basedonthefindings,wechoseappropriatematerialsandcompoundstructureofphotoniccrystalsoastogethighX-rayreflectioncoatingphotoniccrystallayers.Bythismethod,thereflectionratewithinX-raywavelengthcanreachthemaximumvalueof100%,andtheaveragevalueofover90%.Evenlow-costheavymetalX-rayprotectionglassofabsorptioncoefficientvaluecanachievethedesiredeffect.Thus,thismethodgreatlydecreasestheanti-radiationrequirementsofheavyX-rayprotectionglass.
简介:THESTATUSANDTRENDOFLAPAROSCOPICSURGERYINCHINATHESTATUSANDTRENDOFLAPAROSCOPICSURGERYINCHINAGaoYi;YangJi-Zhen(DepartmentofSurge...
简介:DEVELOPMENTOFAVERSATILESENSINGMEMBRANEFORIMMUBILIZATIONOFPROTEINANDANEWIMMOBILIZATIONMETHODY.K.Zhou,J.W.Yuan,S.Q.Xu,B.H.Shu(D...
简介:Basedontheinvestigationofthefourdifferentcompositiondentalamalgamal-loysmadebysametechnologricalprocess,therelationbetweenphysicalpropertiesandmicrostructureofthemhasbeendiscussedindetail.Thetheoryfoundationhasbeenexaminedforthedesignofdentalamalgamalloy.Themainconclusionsareasfollows:
简介:CoriolisForceisthePrimaryCauseofRight-leftAsymmetry.Ananimalmov-ingontheNorthernHemispherebearsCoriolisforcewhichisperpendiculartothevelocityofthemotionandwhichpointstotherightoftheanimal.Thisright-direct-ingforcewillbedenotedbyFc.Itactsthroughoutthelifeofananimal;indeed,throughoutthelivesofallofitsancestors,fromthefetaltoadultstagesineverypartofthebody.Let’sconsiderfirstabodywithtwolegsslidingonearth.Therightlegwouldsustainalargerforcethantheleftleg.Acomplexsystemofmus-
简介:High-frequencyimagetechniquehasbeenwidelyappliedinmedicaldiagnosisrecently.Forhighvoltageprotection,highspeedstageandtriggercontrolcircuitryaredifficulttoimplementahigh-frequencyultrasoundimagingsystem.Inthisstudy,weutilizedalinearservowithhighnoisetoleranceandanovelmulti-depthexpressionmethodtoovercomethoseissuesindevelopedhigh-speedimagesystem.B-modeimageofthechickenphantomby25MHztransducershowstheresolutionoflateralandaxialresolutionsareupto123μmand59μmrespectively.Inaddition,theexperimentdemonstratesthattheaxialresolutionanddepthoffield(DOF)canbeimprovedbytimegaincompensation(TGC)andmulti-depthmethod.Theresultsindicatethattheproposedsystemcouldachieveover24fpsfor1mmscandistanceand100linesperframe.Inthefuture,thedevelopedsystemispotentialforotherclinicalapplicationssuchasophthalmologyanddermatology.
简介:<Abstract>ThepurposeofthisstudywastodesignabioreactorforbioarLificialliverandstudyitsefficacythroughinvitroexperiment;testifiedthesafetyandefficacyoftheBALthroughtreatmentwithBALonacutefulminantischemichepaticfailurecaninemodels.