简介:Inthispaper,anewcoveringalgorithmcalledFCV1ispresented.FCV1comprisestwoalgorithms,oneofwhichisabletofastsearchforapartialruleandexcludethelargeportionofneggativeexamples,theotheralgorithmincorporatesthemoreoptimizedgreedyset-coveringalgorithm,andrunsonasmallportionoftrainingexamples.Hence,thetrainingprocessofFCV1ismuchfasterthanthatofAQ15.
简介:Inthispaper,aneffectiveandrobustactivespeechdetectionmethodisproposedbasedonthe1/fprocesstechniqueforsignalsundernon-stationarynoisyenvironments.TheGaussian1/fprocess,amathematicalmodelforstatisticallyself-similarradomprocessesbasedonfractals,isselectedtomodelthespeechandthebackgroundnoise.AnoptimalBayesiantwo-classclassifierisdevelopedtodiscriminatethembytheir1/fwaveletcoefficientswithKarhunen-Loeve-typeproperties.Multipletemplatesaretrainedforthespeechsignal,andtheparametersofthebackgroundnoisecanbedynamicallyadaptedinruntimetomodelthevariationofboththespeechandthenoise.Inourexperiments,a10-minutelongspeechwithdifferenttypesofnoisesrangingfrom20dBto5dBistestedusingthisnewdetectionmethod.Ahighperformancewithover90%detectionaccuracyisachievedwhenaverageSNRisabout10dB.
简介:我国的高职高专教育课程模式经历了三次具有转折意义的改革和创新。第一次改革,主要是我国学者根据国家经济发展的变化和高职课程改革中存在的问题进行的课程改革,如“宽基础、活模块”课程模式。第二次改革,是在教育部和劳动部的指导下,引进了世界劳工组织的MES模式、北美的CBE课程模式、德国的“双元制”模式等,在此基础上,我国学者进行了本土化的课程模式研究,如多元整合课程、VOCSCUM2004等,在我国高等职业教育课程中得到推广并起到了重要的推动作用。第三次改革是从2004年开始,我国积极地学习德国基于工作过程系统化的课程开发方法,不断研究如何将这一先进的课程开发方法本土化,推出适合我国国情的课程开发方法。