简介:Thisresearchpresentsanalgorithmforfacedetectionbasedoncolorimagesusingthreemaincomponents:skincolorcharacteristics,haircolorcharacteristics,andadecisionstructurewhichconvertstheobtainedinformationfromskinandhairregionstolabelsforidentifyingtheobjectdependenciesandrejectingmanyoftheincorrectdecisions.Hereweusefacecolorcharacteristicsthathaveagoodresistanceagainstthefacerotationsandexpressions.Thisalgorithmisalsocapableofbeingcombinedwithothermethodsoffacerecognitionineachstagetoimprovethedetection.
简介:在许多机器学习应用程序,数据不是免费的,并且为每个数据项目有测试费用。为节俭的原因,最小化测试的某存在工作尝试花费了并且同时,保存一个给定的决定系统的一个特别性质。在这份报纸,我们指出一个人能负担得起的测试费用在一些应用是有限的。因此,一个人不得不牺牲各自的性质在一项预算下面保留测试费用。形式化这期,我们定义测试费用限制属性减小问题,在优化目的是最小化有条件的信息熵的地方。这个问题是test-cost-sensitive属性减小问题和0-1背囊问题的必要归纳,因此它是更挑战性的。我们基于信息获得和测试费用建议一个启发式的算法处理新问题。算法在四UCI上被测试(加利福尼亚大学-Irvine)有各种各样的测试的数据集花费了背景。试验性的结果显示唯一的userspecified参数的适当设置。
简介:Anovelopticaltestingtarget(OTT)withthreedegreesoffreedom(DOFs)isproposedformeasuringthetrackingperformanceofaphotoelectrictheodolite.Themaincomponents,suchastheazimuthaxissystem,thepitchingaxissystem,thelinearmotionsystem,andthesimulatedtargetgenerator,aredesigned.Furthermore,thelinearmodulewiththeformofalarge-spanandlow-stiffnesscantileverbeamisstrengthenedusinganintegratedoptimizationmethod.Afterthestructureisstrengthened,the1st-ordernaturalfrequencyincreasesfrom14Hzto32Hz.Finally,afunctionaltestisperformedandtheresultsshowthatcomparedwithatraditionalopticaltesttarget,thesimulatedtargetgeneratedbythenoveltargetisadvantageousinpractice.
简介:Alasersimulatorisproposedwhichisbasedonahardware-in-loop(HWIL)simulationtestsystem.Asanimportantdeviceinthesimulationtestsystem,itisusedtosimulatethelaserenergyandthedivergenceangle.ThelasersimulatorsimulatestheattenuationprocessoflaserenergybythecontinuousrotationofGlanprismsandthechangingoflaserspotsizethroughthecontinuousmotionofthelaserbeamexpandingtelescopeonthestraightplatform.Thedynamicattenuationvelocityofthelasersimulatorisupto4dB/s,andthedivergenceangleadjustmentvelocityisupto3mrad/s.Themethodisfeasibleforthesimulationtest.
简介:ThelifeofimpregnatedBa-Wcathodeswithanewconstructionhavebeenevaluatedusinganacceleratedlifetestatthreedifferenttemperatures(1170℃,1130℃,1090℃)andconstantcurrentdensity(2A/cm~2).Accordingtotherelationshipoflifewithoperatingtemperatures,anacceleratedequationhasbeensetup.Thecathodelifeatnormaloperatingtemperatureisdeductedbasedontheacceleratedequation.Theresultsshowthatlifeofthenovelcathodeexceeds190,000houratacurrentdensityof2A/cm~2.
简介:Thereadoutintegratedcircuit(ROIC)technologyisoneofthecriticaltechnologiesintheresearchofaninfraredfocalplanearray(IRFPA).Basedonthevirtualinstrumenttechnology,asystemforparametertestofROICisdevelopedforIRFPA.Thecomplexprogrammablelogicdevice(CPLD)isappliedintothesystemtoincreaseitsflexibility.Withhighreliabilityandprecision,alongwiththeintegratedsoftwareandhardwareenvironment,thesystemcantestallkindsofROICs.
简介:Selectionoftestcasesplaysakeyroleinimprovingtestingefficiency.Black-boxtestingisanimportantwayoftesting,anditsvalidityliesontheselectionoftestcasesinsomesense.Areasonableandeffectivemethodabouttheselectionandgenerationoftestcasesisurgentlyneeded.Thisletterfirstintroducessomeusualmethodsonblack-boxtestcasegeneration,thenproposesanewalgorithmbasedoninterfaceparametersanddiscussesitsproperties,finallyshowstheeffectivenessofthealgorithm.
简介:Anewmeasurement-basedadmissioncontrolalgorithmtosupportQualityofService(QoS)demandisproposedforsoftreal-timeapplications.Inthealgorithm,admissiontestisperformedacrossMultipleTime-Scales(MTS)toaccuratelycapturetrafficfluctuationonvarioustime-scales.ByapplyingtheQoSrequirementsdirectlytoadmissiontest,theMTSalgorithmcanproperlymeettheQoStargetandmaximizethebandwidthutilization.
简介:Anoveldesignofatwo-axisfaststeeringmirror(FSM)withpiezoelectricactuatorsisproposedforincoherentlaserbeamcombination.ThemechanicalperformanceoftheFSMistested.Theresultsshowthatthetiltingrangeofthemirrorisabout4mrad,andthe1st-orderresonancefrequencyisabout250Hz.Aself-designedgratingencoderistakenasthesensor,whichensurestheoptimalprecisionof10μrad.Thenovelmechanicaldesigncanmeettherequirementofengineeringinincoherentlaserbeamcombination.
简介:Itisrevealedthatthedynamicstabilityof2-Drecursivecontinuous-discretesystemswithintervalparametersinvolvestheproblemofrobustHurwitz-Schurstabilityofbivariatepolynomialsfamily.ItisprovedthattheHurwitz-Schurstabilityofthedenominatorpolynomialsofthesystemsisnecessaryandsufficientfortheasymptoticstabilityofthe2-Dhybridsystems.The2-Dhybridtransformation,i.e.2-DLaplace-Ztransformation,hasbeenproposedtosolvethestabilityanalysisofthe2-Dcontinuous-discretesystems,togetthe2-Dhybridtransferfunctionsofthesystems.TheedgetestfortheHurwitz-Schurstabilityofintervalbivariatepolynomialsisintroduced.TheHurwitz-Schurstabilityoftheintervalfamilyof2-Dpolynomialscanbeguaranteedbythestabilityofitsfiniteedgepolynomialsofthefamily.Analgorithmaboutthestabilitytestofedgepolynomialsisgiven.
简介:扬声器适应测试正规化(ATnorm)是在文章无关的扬声器确认的广泛地使用的分数正规化的最有效的途径,它选择扬声器有一个额外的开发语料库的适应冒名顶替者队以便提高识别性能。在这份报纸,能在原来的ATnorm上提供全面重要优点的ATnorm的改进实现被介绍。这个方法在说话者采用新奇生气类似大小没有一个额外的发展语料库的适应的队模型选择。它能与原来的ATnorm完成可比较的表演并且中等减少计算复杂性。与保存额外的开发语料库的完整的使用,全面系统性能能显著地被改进。结果在这个方法在系统性能提供重要改进,这被显示出的NIST2006扬声器识别评估数据语料库上被介绍,与相对,14.4%逼近相等的错误率(无论何时),14.6%逼近总体上获得的决定费用功能(DCF)。
简介:UnderType-IIprogressivelyhybridcensoring,thispaperdiscussesstatisticalinferenceandoptimaldesignonstepstresspartiallyacceleratedlifetestforhybridsysteminpresenceofmaskeddata.ItisassumedthatthelifetimeofthecomponentinhybridsystemsfollowsindependentandidenticalmodifiedWeibulldistributions.Themaximumlikelihoodestimations(MLEs)oftheunknownparameters,accelerationfactorandreliabilityindexesarederivedbyusingtheNewton-Raphsonalgorithm.Theasymptoticvariance-covariancematrixandtheapproximateconfidenceintervalsareobtainedbasedonnormalapproximationtotheasymptoticdistributionofMLEsofmodelparameters.Moreover,twobootstrapconfidenceintervalsareconstructedbyusingtheparametricbootstrapmethod.TheoptimaltimeofchangingstresslevelsisdeterminedunderD-optimalityandA-optimalitycriteria.Finally,theMonteCarlosimulationstudyiscarriedouttoillustratetheproposedprocedures.