简介：EngineeringChange(EC)managementforaProductLifecycleManagement(PLM)system,includingECdatamodel,ECevaluationandECimplementationispresented.AmethodofdynamicandparallelECevaluationisproposed,whichbreaksanECevaluationtaskintoseveralsubtasks.Suchsubtaskscanbedynamicallyandsimultaneouslyproceeded,disassembledandcommunicatedbydifferentspecialists,andatthesametimeasetofECobjectsiscreated.ThisapproachprovidesflexibleandeffectiveevaluationoftheEC.TheECimplementationfollowedwillfurtherensurethecompletenessandconsistencyofECdata.

简介：ＳＨＥＬＬＡＤＡＰＴＩＶＥＴＲＩＡＮＧＵＬＡＴＩＯＮＯＦＴＲＩＭＭＥＤＮＵＲＢＳＳＵＲＦＡＣＥＷａｎｇＨｕｉｃｈｅｎｇＺｈａｎｇＸｉｎｆａｎｇＺｈｏｕＪｉＡｂｓｔｒａｃｔＴｈｅｐａｐｅｒｐｒｅｓｅｎｔｓａｎｅｗａｐｐｒｏａｃｈｆｏｒｔｒｉａｎｇｕｌａ...

简介：Inthispaper,weproposeafacerecognitionapproach-StructedSparseRepresentation-basedclassificationwhenthemeasurementofthetestsampleislessthanthenumbertrainingsamplesofeachsubject.Whenthisconditionisnotsatisfied,weexploitNearestSubspaceapproachtoclassifythetestsample.Inordertoadaptallthecases,wecombinethetwoapproachestoanadaptiveclassificationmethod-Adaptiveapproach.TheadaptiveapproachyieldsgreaterrecognitionaccuracythantheSRCapproachandCRC_RLSapproachwithlowsamplerateontheExtendYaleBdataset.Anditismoreefficientthanothertwoapproaches.

简介：SeveralfiltertechniqueswereavailablefortheGPSpositionestimationproblemofmaneuveringvehiclerangingfromusingdifferentprocessnoisestoInteractiveMultipleModel(IMM).ThelimitationofusingstandardKalmanfiltersislisted.Theperformanceofproposedadaptivefilteriscomparedwiththatofthestandardones,twotypesofdynamicmodelingofthemaneuveringvehicleareused.ThesimulationisbasedonthealmanacdataoftheGPSsatellitestocomputeitsfeasibilityduringthesimulationtimeandpositiononshape8trackwithcontinuousvehiclemaneuvering.Thegoalistoobtaincomputationallyefficientfilterwithreasonableaccuracyforvehicleinmaneuveringsituation.ThefilterproposedisanalternativetothefilterproposedinRef.[1]withlowcomputationalburden.

简介：Accordingtothestudyonseat-backcurvesaboutdifferentpeople,themethodthatusingtwoarc-shapedroofstogivebacksupportingforceofthehumanbodyisproposed.Throughacleverdesignapplicationofpiezoelectricsensor,microcontroller,motors,andarc-shapedroofsformaclosedloopcontrolsystem.Throughthedesignofhorizontalandverticaladjustmentmechanism,aflexibleandadaptivemulti-dimensionalbackcanreducetheharmtohumanspinewhichcausedbypoorpostureandsedentarylifestyle.ModelbuildingandstressanalysisaredonebyInventorsoftwaretoverifythemechanismofstrength.

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简介：ＡＤＡＰＴＩＶＥＳＴＲＡＴＥＧＩＥＳＦＯＲＮＣＭＡＣＨＩＮＩＮＧＣＯＭＰＯＵＮＤＦＲＥＥ－ＦＯＲＭＳＵＲＦＡＣＥＳＧａｏＳａｎｄｅ；ＺｈｏｕＹｕｎｆｅｉ；ＺｈａｎｇＸｉｎｆａｎｇ；ＺｈｏｕＪｉＡＤＡＰＴＩＶＥＳＴＲＡＴＥＧＩＥＳＦＯＲＮＣＭＡＣＨＩＮ...

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简介：Controlmethodsofhysteresiscurrentvectorcontrolofpermanentmagnetsynchronousservodrivefedbyvoltagesourceinverterareexamined.Detaileddescriptionofthecontrolmethodsinstationaryreferenceframewithcircle,squareandhexagonshapetoleranceareausingadaptivesolutionsispresented.Thetheoreticalconsiderationsaresupportedbysimulationresults.

简介：Thecoherencecubetechnologyhasbecomeanimportanttechnologyfortheseismicattributeinterpretation,whichextractsthediscontinuitiesoftheeventsthroughanalyzingthesimilaritiesofadjacentseismicchannelstoidentifythefaultform.Thecoherencecubetechnologywhichusesconstanttimewindowlengthscannotbalancetheshallowlayersandthedeeplayers,becausethefrequencybandofseismicdatavarieswithtime.Whenanalyzingtheshallowlayers,thetimewindowwillcrossoveralotofevents,whichwillleadtoweakfocusingabilityandfailuretodelineatethedetails.Whilethetimewindowwillnotbelongenoughforanalyzingdeeplayers,whichwillleadtolowaccuracybecausethecoherencesnearthezeropointsoftheeventsareheavilyinfluencedbynoise.Forsolvingtheproblem,weshouldmakearesearchonthecoherencecubetechnologywithself-adaptivetimewindow.Thispaperdeterminesthesamplepoints’timewindowlengthsinrealtimebycomputingtheinstantaneousfrequencybandswithWaveletTransformation,whichgivesacoherencecomputingmethodwiththeself-adaptivetimewindowlengths.Theresultshowsthatthecoherencecubetechnologywithself-adaptivetimewindowbasedonWaveletTransformationimprovestheaccuracyoffaultidentification,andsupressesthenoiseeffectively.Themethodcombinestheadvantagesoflongtimewindowmethodandshorttimewindowmethod.

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简介：１ＩｎｔｒｏｄｕｃｔｉｏｎＭｅｃｈａｎｉｃａｌＣＡＤｓｙｓｔｅｍｓｕｓｅ３Ｄｇｅｏｍｅｔｒｉｃｒｅｐｒｅｓｅｎｔａｔｉｏｎｔｏｆｏｒｍｔｈｅｇｌｏｂａｌｐｒｏｄｕｃｔｉｎｆｏｒｍａｔｉｏｎｍｏｄｅｌｆｏｒｓａｔｉｓｆｙｉｎｇｔｈｅｗｈｏｌｅｌｉｆｅ...

简介：HY-760是现代荣御系列产品的第二款，不像荣御HY-2008韩国版那般拥有高知名度。但是，其低音表现有明显提升，除了低音单元更换为65英寸外，功率也提升到了60W；另外，造型方面HY-760音箱的棱角更加分明，三分频设计使得HY-760音箱的中频表现也更加出色。

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简介：Face-to-faceVideoconferencingisapopularoptionformanylargeorganizationsbecauseitminimizestheneedfortravel.Insteadofcontinuallypayingfortravelingexpenses,acompanycaneitherpaytosetupahighspeednetworkwhichhasmanyusages(includingvideoconferencing)ortheycanrenttimeonanexistingnetwork.Employeeswillalsonolongerbeburdenedwiththeneedtotravel.Whileface-to-facevideoconferencingperformanceisheavilyinfluencedbytheunderlyinghardwareandsoftware,agoodvideocompressionschemecanhelpmakethebestuseofvideoconferencingandprovideahighqualitypicture.H.263standardisnowwidelyusedforreal-timevideocommunicationsoverarangeofnetworksincludingtheInternet.AframeworkforbetterunderstandingtheH.263includingtheimplementationofencoderanddecoderforface-to-facevideoconferencingispresented.ThissoftwarewaswritteninC++language,runningundertheMicrosoftWindowsoperatingsystem.