简介：ＳＥＲＶＥＴＨＥＳＣＩＥＮＴＩＦＩＣＲＥＳＥＡＲＣＨＢＹＩＮＴＥＲＮＥＴＳＥＲＶＥＴＨＥＳＣＩＥＮＴＩＦＩＣＲＥＳＥＡＲＣＨＢＹＩＮＴＥＲＮＥＴＺｈａｏＡｉｆａｎｇ；ａｎｄＺｈａｎｇＺｈｅｎｇｇｕｏ（ＴｈｅｉｎｓｔｉｔｕｔｅｏｆＢａｓｉｃＭｅｄｉｃａ...

简介：ChinesescholarshaverealizedtheimportanceofArtificialOrganresearch.TheScienceandTechonlogyCommitteeofChinasetupaspecialworkinggroupin1978inordertodeveloptheresearchprojectsofartificialorgans.TheChineseSocietyofBiomedicalEngineeringestablishedtheArtificialOrgansSocietyandsince1982itholdsconferenceseverythreeyears.

简介：ANewTechniqueThatStimulatesKeyNerveCellsintheSpinalCordOffersHopeforPatients,ScientistsSayInapotentialbreakthroughforthetreatmentofspinal-cordinjuries,amanparalyzedbelowthechesthasregained

简介：Duringourresearch,Ithasbeenfoundthatbodyaccelerationhasstrongrelationshipswiththehumanenergyexpenditure.Thispaperdiscussesthemethodstoassessphysicalactivityandconcludesthatforaccurateassessmentofphysicalactivityunderfreelivingconditionstherecentlyintroducedaccelerometerlooksmostpromising.Wedevelopedanewcomputerizedmachinetoassessthebodyactivityandenergyexpenditure.Testdatasofthetreadmillexperiment,respirationexperimentand5-kilometer-runningexperimenthavebeenarchieved,wefoundthatbodyaccerationintegralswithtimehaslinearrelationswithbodyenergyexpenture.

简介：Anewtechnologythatsimulatestumorshasbeenshowntoperformaswellasresearchanimalsintestingchemotherapydrugs,representingapotentialtoolforscreeningdrugsbeforetreatingapatient.Along-termgoalistoincorporatebiopsiedcancercellsfrompatientsandtesttheeffectivenessofdifferentdrugsonthepatient-derivedcells.

简介：ＰＲＥＬＩＭＩＮＡＲＹＲＥＳＥＡＲＣＨＯＦＨＵＭＡＮＨＥＰＡＴＯＣＹＴＥＣＥＬＬＬＩＮＥＡＳＴＨＥＢＩＯＬＯＧＩＣＡＬＭＡＴＥＲＩＡＬＯＦＥＬＡＤＰＲＥＬＩＭＩＮＡＲＹＲＥＳＥＡＲＣＨＯＦＨＵＭＡＮＨＥＰＡＴＯＣＹＴＥＣＥＬＬＬＩＮＥＡＳＴＨＥＢＩＯ...

简介：ＥＸＰＥＲＩＭＥＮＴＡＬＲＥＳＥＡＲＣＨＯＦＥＬＦＥＭＦＯＮＣＨＡＮＧＥＯＦＨＥＭＯＲＨＥＯＬＯＧＩＣＡＬＰＲＯＰＥＲＴＹＡＮＤＤＥＳＩＧＮＯＦＥＬＦＥＭＦＧＥＮＥＲＡＴＯＲＥＸＰＥＲＩＭＥＮＴＡＬＲＥＳＥＡＲＣＨＯＦＥＬＦＥＭＦＯＮＣＨＡＮＧＥＯＦ...

简介：Epilepsyisacommonneurologicaldisorder,anditselectrophysiologycharacteristicisabnormallyhighexcitabilityandsynchronizationoftheneuralactivity.Thispaperfocusesonthestudyofmedialtemporallobeepilepsywithhippocampalsclerosis.Thehippocampusplaysanimportantroleinshort-termmemory.However,littleisknownabouttheconnectivitybetweenhippocampalstructuresandadjacentbrainregions.Thefunctionalandstructuralconnectivitybetweenpatientsandcontrolswasinvestigatedbyusingthetechniquesoffunctionalmagneticresonanceimaginganddiffusiontensorimaginginthepaper.ThreepairsofROIsrelatedtoworkingmemoryfromBOLD-fMRIdatawerechosen.TheseROIswereregistratedfromMNIspacetoindividualspaceandthefiberbundlebetweentwoROIsweretracedintheDTIimages.TheresultsshowthatthenumberoffiberbundleofpatientsreduceamongtheseROIs,suchaslefthippocampusandrighthippocampus,lefthippocampusandleftthalamus,lefthippocampusandleftfrontallobeandsoon.AndthenumberoffiberbundleofpatientsincreaseamongtheseROIs,suchasleftthalamusandrightthalamus,righthippocampusandrightthalamus.AndtheFAvaluesofthefiberbundlesofpatientsinsomeregionsrelatedtolefthippocampusdecrease.Thecauseofabnormalfunctionalandstructuralconnectionsduetothedamageofhippocampusinmedialtemporallobeepilepsyisstudiedfromanewperspective.

简介：

简介：MatthiasLtitolfandhisPhDstudent,twoscientistsattheEPFL＇sInstituteofBioengineering,havedevelopedanewtechniqueforusinglaserstocarvepathwaysinhydrogelscaffoldsina3Dcellcultureenvironmenttocontrolthegrowthoftheculture.

简介：Thisresearchusesalginateandhyaluronicacidasthemaincomponenttopreparesupport,thenexploresthepossibilitiesasatissueengineeringscaffold.Firstly,prepareHAwithvariousaveragemolecularweightandalginatewithdifferentviscosity,mixthemupatacertainproportionandmakeitintoaAlgCa2+-HAcompositescaffoldwithafilm-formingmethod.Thisarticlediscussesthefeasibilityofthisscaffoldusedintissueengineeringfieldaccordingtotheconsequenceofmoisturecontenttesting,mechanicalanalysis,andscanningelectronmicroscopyanalysis.ThestructureandpropertiesofAlgCa2+-HAcompositescaffoldarecloselyrelatedtosomefactorssuchasaveragemolecularweightofhyaluronicacid,hyaluronicacidconcentration,alginateviscosity,cross-linkingagentsandprocessingtechnology.TheAlgCa2+-HAcompositematerial,whichisatdifferentproportionsandaddingdifferentcross-linkingagent,hassomecertaincharacteristics:moisturecontentrangingfrom50%to95%,tensilestrengthbetween2.69N/mm2and4.299N/mm2,andelongationatbreakisabout58%to160%.ThepreparedAlgCa2+-HAcompositescaffoldscanbeusedastissueengineeringscaffoldsresultingfromitshighmoisturecontent,goodmechanicalpropertiesandidealporestructure.更多还原

简介：Thispaperaimstomeettherequirementsofreducingthescanningtimeofmagneticresonanceimaging(MRI),acceleratingMRIandreconstructingahighqualityimagefromlessacquisitiondataasmuchaspossible.MRImethodbasedoncompressedsensing(CS)withmultipleregularizations(tworegularizationsincludingtotalvariation(TV)normandL1normorthreeregularizationsconsistingoftotalvariation,L1normandwavelettreestructure)isproposedinthispaper,whichisimplementedbyapplyingsplitaugmentedlagrangianshrinkagealgorithm(SALSA).TosolvemagneticresonanceimagereconstructionproblemswithlinearcombinationsoftotalvariationandL1norm,weutilizedcompositesplitdenoising(CSD)tosplittheoriginalcomplexproblemintoTVnormandL1normregularizationsubproblemswhichweresimpleandeasytobesolvedrespectivelyinthispaper.Thereconstructedimagewasobtainedfromtheweightedaverageofsolutionsfromtwosubproblemsinaniterativeframework.BecauseeachofthesplittedsubproblemscanberegardedasMRImodelbasedonCSwithsingleregularization,andforsolvingthekindofmodel,splitaugmentedlagrangealgorithmhasadvantageoverexistingfastalgorithmsuchasfastiterativeshrinkagethresholding(FIST)andtwostepiterativeshrinkagethresholding(TwIST)inconvergencespeed.Therefore,weproposedtoadoptSALSAtosolvethesubproblems.Moreover,inordertosolvemagneticresonanceimagereconstructionproblemswithlinearcombinationsoftotalvariation,L1normandwavelettreestructure,wecansplittheoriginalproblemintothreesubproblemsinthesamemanner,whichcanbeprocessedbyexistingiterationscheme.Agreatdealofexperimentalresultsshowthattheproposedmethodscaneffectivelyreconstructtheoriginalimage.ComparedwithexistingalgorithmssuchasTVCMRI,RecPF,CSA,FCSAandWaTMRI,theproposedmethodshavegreatlyimprovedthequalityofthereconstructedimagesandhavebettervisualeffect.

简介：X光检查同轴的阶段对比成像微弱地启用吸收标本与高分辨率和定义成功地被想象。在这篇论文，我们使用计算机模拟方法分析每个参数怎么影响图象的质量。它能避免在实验期间浪费不必要的时间和材料得到理想的图象。

简介：ImagegeometrydistortionisanimportanttechnicalstandardinB-modeultra-sounddiagnosissystem.ThispaperinvestigatesthecauseofimagedistortioninphasedarrayB-modeultrasounddiagnosissystem.Thefirstdistortioncauseisthedelayerrorofcompoundwavebind.Phasedarrayultrasoundtranduceriscomposedofmanyrectangleunits.Withcontrollinginspiringplustime,ultrasoundwave