简介：Theinfluenceofp-typeGaN(pGaN)thicknessonthelightoutputpower(LOP)andinternalquantumefficiency(IQE)oflightemittingdiode(LED)wasstudiedbyexperimentsandsimulations.TheLOPofGaN-basedLEDincreasesasthethicknessofpGaNlayerdecreasesfrom300nmto100nm,andthendecreasesasthethicknessdecreasesto50nm.TheLOPofLEDwith100-nm-thickpGaNincreasesby30.9%comparedwiththatoftheconventionalLEDwith300-nm-thickpGaN.ThevariationtrendofIQEissimilartothatofLOPasthedecreaseofGaNthickness.ThesimulationresultsdemonstratethatthehigherlightefficiencyofLEDwith100-nm-thickpGaNisascribedtotheimprovementsofthecarrierconcentrationsandrecombinationrates.

简介：Intheopennetworkenvironment,maliciousattackstothetrustmodelhavebecomeincreasinglyserious.Comparedwithsinglenodeattacks,collusionattacksdomoreharmtothetrustmodel.Tosolvethisproblem,acollusiondetectorbasedontheGNalgorithmforthetrustevaluationmodelisproposedintheopenInternetenvironment.Byanalyzingthebehavioralcharacteristicsofcollusiongroups,theconceptofflattingisdefinedandtheG-Ncommunityminingalgorithmisusedtodividesuspiciouscommunities.Onthisbasis,acollusioncommunitydetectormethodisproposedbasedonthebreakingstrengthofsuspiciouscommunities.Simulationresultsshowthatthemodelhashighrecognitionaccuracyinidentifyingcollusionnodes,soastoeffectivelydefendagainstmaliciousattacksofcollusionnodes.

简介：常见的模2-n＋1乘法器多采用权重码或者缩一码实现。为实现高效的模2-n＋1乘法器,本文采用权重码和缩一码混合的方式,实现快速的输入和输出,在同类算法中,该方法实现的效率最快。

简介：3月31日消息（南山）中国联通今日举办＂中国联通沃云＋大会＂,对外发布了公司未来的云计算发展策略,成为中国通信业率先发布云计算策略的运营商。同时,中国联通发起成立了＂中国联通沃云＋云生态联盟＂,董事长王晓初宣布＂中国联通沃云＋云生态联盟＂正式成立,并启动成立仪式。＂中国联通全面实施聚焦战略、创新合作发展,云计算作为六大创新业务领域之一,将成为公司发展新的重要增长极。＂