简介：Gymnarchusniloticusswimsbyundulationsofalong-baseddorsalfin,whileitsbodyaxisisinmanycasesheldstraightduringswimming.ThispaperprovidesabriefrelevantintroductiontoGymnarchusniloticus,whichbelongstotheAfricanfreshwaterelectriceelsbutcaninspireourbionicinterestsinpropulsionbesidesitsabilitiesinelectricsensing.AspeciallarvaofGymnarchusniloticuswasmorphologicallymeasuredbyphotographingitwithapieceofscale-calibratedpaperasthebackground.ThenweanalyzedthedatabyaCFD-aidedapproach.DetailedflowpatternsaroundthelarvaandaNACA0012hydrofoilwererespectivelycalculatedandvisualizedattheReynoldsnumberof7350orso.TheresultsshowthattheprofileofGymnarchusniloticusiswellstreamlined.

简介：

简介：CommondisplayssuchasCRTorLCDscreenshavelimitedcapabilitiesindisplayingmostcolorspectracorrectly.Themaindisadvantageofthesedevicesisthattheyworkwiththreeprimariesandthecolorsdisplayedarethemixtureofthesethreecolours.Consequentlythesedevicescanbeconfusingintestinghumancoloridentification,becausethespectraldistributionofthecolorsdisplayedisthecombinedspectrumofthethreeprimaries.Wehavedevelopedanewinstrumentforspectrallycorrectcolorvisionmeasurement.Thisinstrumentuseslightemittingdiodes(LEDs)andiscapableofproducingallspectraofperceivablecolors,thuswithappropriatetestmethodsthisinstrumentcanbeareliableandusefultoolintestinghumancolorvisionandinverifyingcolorvisioncorrection.

简介：Whencharacterizingflowsinminiaturizedchannels,thedeterminationofthedynamiccontactangleisimportant.Bymeasuringthedynamiccontactangle,theflowpropertiesoftheflowingliquidandtheeffectofmaterialpropertiesontheflowcanbecharacterized.Amachinevisionbasedsystemtomeasurethecontactangleoffrontorrearmenisciofamovingliquidplugisdescribedinthisarticle.Inthisresearch,transparentflowchannelsfabricatedonthermoplasticpolymerandsealedwithanadhesivetapeareused.Thetransparencyofthechannelsenablesimagebasedmonitoringandmeasurementofflowvariables,includingthedynamiccontactangle.Itisshownthatthedynamicanglecanbemeasuredfromaliquidflowinachannelusingtheimagebasedmeasurementsystem.AnimageprocessingalgorithmhasbeendevelopedinaMATLAB?environment.Im-agesaretakenusingaCCDcameraandthechannelsareilluminatedusingacustommaderinglight.Twofittingmethods,acircleandtwoparabolas,areexperimentedandtheresultsarecomparedinthemeasurementofthedynamiccontactangles.

简介：Mosquitoesareexceptionalintheirabilitytopierceintohumanskinwithanaturalultimatepainlessmicroneedle,namedfascicle.HerethestructureoftheAedesalbopictusmosquitofascicleisobtainedusingaScanningElectronMicroscope(SEM),andthewholeprocessofthefascicleinsertingintohumanskinisobservedusingahigh-speedvideoimagingtechnique.Directmeasurementsoftheinsertionforceformosquitofascicletopenetrateintohumanskinarereported.Resultsshowthatthemosquitousesaverylowforce(average18μN)topenetrateintotheskin.Thisforceisatleastthreeordersofmagnitudesmallerthanthereportedlowestinsertionforceforanartificialmicroneedlewithanultrasharptiptoinsertintothehumanskin.Inordertounderstandthepiercingmechanismofmosquitofascicletipintohumanmultilayerskintissue,anumericalsimulationisconductedtoanalyzetheinsertionprocessusinganonlinearfiniteelementmethod.Agoodagreementoccursbetweenthenumericalresultsandtheexperimentalmeasurements.

简介：Multisensordatafusion(MDF)isanemergingtechnologytofusedatafrommultiplesensorsinordertomakeamoreaccurateestimationoftheenvironmentthroughmeasurementanddetection.ApplicationsofMDFcrossawidespectruminmilitaryandcivilianareas.Withtherapidevolutionofcomputersandtheproliferationofmicro-mechanical/electricalsystemssensors,theutilizationofMDFisbeingpopularizedinresearchandapplications.ThispaperfocusesonapplicationofMDFforhighqualitydataanalysisandprocessinginmeasurementandinstrumentation.Apractical,generaldatafusionschemewasestablishedonthebasisoffeatureextractionandmergeofdatafrommultiplesensors.Thisschemeintegratesartificialneuralnetworksforhighperformancepatternrecognition.AnumberofsuccessfulapplicationsinareasofNDI(Non-DestructiveInspection)corrosiondetection,foodqualityandsafetycharacterization,andprecisionagriculturearedescribedanddiscussedinordertomotivatenewapplicationsintheseorotherareas.ThispapergivesanoverallpictureofusingtheMDFmethodtoincreasetheaccuracyofdataanalysisandprocessinginmeasurementandinstrumentationindifferentareasofapplications.

简介：