简介:Waveletde-noisinghasbeenwellknownasanimportantmethodofsignalde-noising.Recently,mostoftheresearcheffortsaboutwaveletde-noisingfocusonhowtoselectthethreshold,whereDonohomethodisappliedwidely.Comparedwithtraditional2-bandwavelet,3-bandwavelethasadvantagesinmanyaspects.Accordingtothistheory,anadaptivesignalde-noisingmethodin3-bandwaveletdomainbasedonnonparametricadaptiveestimationisproposed.Theexperimentalresultsshowthatin3-bandwaveletdomain,theproposedmethodrepresentsbettercharacteristicsthanDonohomethodinprotectingdetailandimprovingthesignal-to-noiseratioofreconstructionsignal.
简介:四川长虹公告称,该公司旗下的等离子(PDP)显示屏及模组项目一期工程建设已全部完成,2009年1月进入批量试产,计划3月份正式量产。受去年四川汶川地震等综合因素影响,四川长虹推迟了PDP屏项目的量产时间。公告还表示,四川长虹去年发行分离交易的可转换公司债券募资之后,两次向负责运营PDP屏项目的四川虹欧显示器件有限公司(下“四川虹欧”)增资共4亿元,目前四川虹欧的注册资本约为3.5亿美元、实收资本为2.75亿美元,四川长虹控股50.94%。现在四川虹欧PDP项目设备安装已全部结束,已小批量试产多品种的高清屏模组和全高清屏模组。
简介:为3D网孔模型的watermarking的支持向量机器(SVM)的使用被调查。SVM广泛地为图象,声音,和录像watermarking被探索了,但是没在3Dwatermarking域被探索标明日期SVM的潜力。建议途径为嵌入的水位标为顶点的选择作为一个二进制分类器利用SVM。SVM被训练,特征向量源于eigen正常和从规范的3D网孔模型拿的顶点的一位1戒指邻居的表面正常之间的尖差别。SVM学会作为修正的适当或不恰当的候选人分类顶点以便提供水位标。试验性的结果证实建议算法对象网孔变光滑那样的攻击细微、柔韧,收割并且噪音增加。
简介:Theultraviolet(UV)bandedgephotorefractivityofLiNbO_3:Zrat325nmhasbeeninvestigated.Theexperimentalresultsshowthattheresistanceagainstphotorefractionat325nmisquiteobviousbutnotasstrongasthatat351nm,whenthedopingconcentrationofZrreaches2.0mol%.ItisreportedthatthephotorefractivityinothertetravalentlydopedLiNbO_3crystals,suchasLiNbO_3:HfandLiNbO_3:Sn,isenhanceddramaticallywithdopingconcentrationoverthreshold.HerewegiveanexplicitexplanationonsuchseemlyconflictingbehaviorsoftetravalentlydopedLiNbO_3,whichisascribedtothecombinedeffectofincreasedphotoconductivityandtheabsorptionstrengthofthebandedgephotorefractivecenters.
简介:Theformaldehyde(HCHO)detectingatroomtemperatureisofgreatsignificance.DifferentratiosofP3HT/ZnOcompositefilms(3:1,1:1,and1:3)weredepositedontheorganicthinfilmtransistor(OTFT)byspray-depositiontechnology,andtheelectricalpropertiesandHCHO-sensingpropertiesofallthepreparedOTFTdevicesweremeasuredbyKeithley4200-SCSsourcemeasurementunit.TheresultsshowthattheOTFTsensorbasedontheP3HT/ZnOfilmswiththeratioof1:1exhibitedthebestoutputandtransfercurves.DifferentchangingtendencywereobservedwiththeincreaseofZnOproportionwhenexposedtoHCHOatroomtemperature,andthedevicewiththeratioof1:1behavedagoodresponseandrecoverycharacteristics.