lms(最小二乘方法)

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1、MachineLearningWhyMachineLearning?Iscomputersmart?Difficultytogetandrepresenttheknowledge.WhyMachineLearning?HumanlearningMachinelearningSlowSlow?Fast?CannotcopyCopyeasilyexpansiveCheap?Expansive?WhyMachineLearning?Newkindofcapabilityforcomputers-Databasemining*Medicalrecords->medicalknowledg

2、e-Applicationswecan’tprogrambyhand*Autonomousdriving*SpeechrecognitionWhyMachineLearning?UnderstandhumanlearningandteachingTimeisright-Recentprogressinalgorithmsandtheory-Growingfloodofonlinedata-ComputationalpowerisavailableModelBasedLearningModelingGettheparametersofmodelbasedonthetrainingd

3、ataModelBasedLearningExample1:Dataset:Equation:y=ax^2+bx+cProblem:tofindtheparameters:a,b,cModelBasedLearningLMS（最小二乘方法）methodModelBasedLearningNewproblem:howtoupdatethea,bandcfromnewdata:ModelBasedLearningExample2:Dataset:Normaldistribution:Problem:tofindtheparameters:ModelBasedLearningCases

4、inpatternrecognitionSee:模式识别,清华大学出版社，2000ModelBasedLearningMoregeneralproblemDataset:Amathematicalmodel.Problem:tofindtheparametersofmodel.ModelBasedLearningMoreexamples.Speechsignalprocessing.FacerecognitionSignatureverification…ModelBasedLearningProgram:MarkV.Shaney’swork擦洗黑板。观察黑板的干燥过程。水进入空

5、气。当水进入空气时，水就蒸发了。把一条湿布系于一个固体或一瓶液体的一端。看看周围。固体是什么？那些进入云层的东西是什么？当云层移动时，空气就使得云层中的小水滴上下颠簸。ModelBasedLearning有时从云上掉下的水进入了绿色植物的叶片。绿色植物有相当多的孔，几乎就象海绵。……为什么我们五个五个一组地计数呢？在人们学习数许多东西时，往往扳着自己的手指头来数。首先他们点出恰好与自己双手的全部手指头一样多的东西。……ModelBasedLearningProgram:MarkV.Shaney’sworkWhydowecountthingsingroupsoffive.Whenp

6、eoplelearnedhowtocountmanythings,theymatchedthemagainsttheirfingers.Firsttheycountedoutenoughthingstomatchthefingersofbothhands.Thentheyputthesethingsasideinonequart.Agiant-sizebottlethatwillholdfourquartsisathree-digitnumber.Adigitgetsitsvaluefromthetopofasidewalkarestraight,and……ModelBasedL

7、earningProgram:MarkV.Shaney’sworkMarkovChain.Steps:Buildawordssetfromthetrainingtext.Learningtransformationmatrixfromthetrainingtext.Writeanewpaper.ModelBasedLearningModel?一位妇人藏了五只灰色的小猫在破旧的汽车里此时那位哀伤的乡农唤起你痛苦的回忆ModelBasedLearningModel?树儿垂下枯萎的枝头