简介：Realizationofefficientyellow-light-emittingdiodes(LEDs)hasalwaysbeenachallengeinsolid-statelighting.Greatefforthasbeenmade,butonlyslightadvancementshaveoccurredinthepastfewdecades.AftercomprehensiveworkonInGaN-basedyellowLEDsonSisubstrate,wesuccessfullymadeabreakthroughandpushedthewall-plugefficiencyof565-nm-yellowLEDsto24.3%at20A∕cm~2and33.7%at3A∕cm~2.ThesuccessofyellowLEDscanbecreditedtotheimprovedmaterialqualityandreducedcompressivestrainofInGaNquantumwellsbyaprestrainedlayerandsubstrate,aswellasenhancedholeinjectionbya3DpnjunctionwithV-pits.

简介：Facede-identificationhasbecomeincreasinglyimportantastheimagesourcesareexplosivelygrowingandeasilyaccessible.Theadvanceofnewfacerecognitiontechniquesalsoarisespeople'sconcernregardingtheprivacyleakage.Themainstreampipelinesoffacede-identificationaremostlybasedonthek-sameframework,whichbearscritiquesofloweffectivenessandpoorvisualquality.Inthispaper,weproposeanewframeworkcalledPrivacy-Protective-GAN(PP-GAN)thatadaptsGAN(generativeadversarialnetwork)withnovelverificatorandregulatormodulesspeciallydesignedforthefacede-identificationproblemtoensuregeneratingde-identifiedoutputwithretainedstructuresimilarityaccordingtoasingleinput.Weevaluatetheproposedapproachintermsofprivacyprotection,utilitypreservation,andstructuresimilarity.Ourapproachnotonlyoutperformsexistingfacede-identificationtechniquesbutalsoprovidesapracticalframeworkofadaptingGANwithpriorsofdomainknowledge.

简介：摘要随着氮化镓（GaN）基发光二极管的效率、亮度、寿命等参数的进一步提升和成本的持续下降，GaN基LED正在逐渐取代传统光源在通用照明、液晶显示器背光源等领域的应用。高压LED是一种集成式芯片，将一块芯片分割成数个互联的发光单元，使得LED在高压低电流的状态下工作，与同样的传统大功率LED相比，高压LED的电流扩展性能和发光效率得到了提高。