简介:Thispaperproposesanewadaptivepost-filteringalgorithmtoremovecodingartifactsinblock-basedvideocoder.Theproposedmethodconcentratesonblockingandringingartifactsremoval.Forde-blocking,theblockingstrengthisidentifiedtodeterminethefilteringrange,andthemaximumquantizationparameteroftheimageisusedtoadaptthe1Dfuzzyfilter.Forde-ringing,besidestheedgedetection,acomplementaryringingdetectionmethodisproposedtolocatetheneglectedringingblocks,andthegradientthresholdisadoptedtoadjusttheparameterof2Dfuzzyfilter.ExperimentsareperformedontheMPEG-4sequences.Comparedwithothermethods,theproposedoneachievesbetterdetailpreservationandartifactsremovalperformancewithlowercomputationalcost.
简介:Inthispaper,weproposealocalfuzzymethodbasedontheideaof"p-strong"communitytodetectthedisjointandoverlappingcommunitiesinnetworks.Inthemethod,arefinedagglomerationruleisdesignedforagglomeratingnodesintolocalcommunities,andtheoverlappingnodesaredetectedbasedontheideaofmakingeachcommunitystrong.Weproposeacontributioncoefficientbvcitomeasurethecontributionofanoverlappingnodetoeachofitsbelongingcommunities,andthefuzzycoefficientsoftheoverlappingnodecanbeobtainedbynormalizingthebvcitoallitsbelongingcommunities.Therunningtimeofourmethodisanalyzedandvarieslinearlywithnetworksize.Weinvestigateourmethodonthecomputergeneratednetworksandrealnetworks.Thetestingresultsindicatethattheaccuracyofourmethodindetectingdisjointcommunitiesishigherthanthoseoftheexistinglocalmethodsandourmethodisefficientfordetectingtheoverlappingnodeswithfuzzycoefficients.Furthermore,thelocaloptimizingschemeusedinourmethodallowsustopartlysolvetheresolutionproblemoftheglobalmodularity.
简介:Avague-set-basedfuzzymulti-objectivedecisionmakingmodelisdevelopedforevaluatingbiddingplansinabid-dingpurchaseprocess.Agroupofdecision-makers(DMs)firstindependentlyassessbiddingplansaccordingtotheirexperienceandpreferences,andtheseassessmentsmaybeexpressedaslinguisticterms,whicharethenconvertedtofuzzynumbers.Theresultingdecisionmatricesarethentransformedtoobjectivemembershipgradematrices.Thelowerboundofsatisfactionandupperboundofdissatisfactionareusedtodetermineeachbiddingplan’ssupporting,opposing,andneutralobjectivesets,whichtogetherdeterminethevaguevalueofabiddingplan.Finally,ascorefunctionisemployedtorankallbiddingplans.Anewscorefunctionbasedonvaguesetsisintroducedinthemodelandanovelmethodispresentedforcalculatingthelowerboundofsat-isfactionandupperboundofdissatisfaction.Inavague-set-basedfuzzymulti-objectivedecisionmakingmodel,differentvalua-tionsforupperandlowerboundsofsatisfactionusuallyleadtodistinctrankingresults.Therefore,itiscrucialtoeffectivelycontainDMs’arbitrarinessandsubjectivitywhenthesevaluesaredetermined.
简介:“夜生活”的概念并不纯粹,对某些人来说,它就是一种白天的生活。有那么一群人.当我们于梦乡中酣畅淋漓时.还在默默地忙碌着,我们笑称他们为夜猫子,其实他们只是和我们作息时间表不同罢了。“日落而作.日出而息”.是他们基本的作息时间.“黑白颠倒”是他们的基本特征.他们自我标榜:我们是夜行一族。在万籁俱寂的夜晚,人的思绪却很容易被集中起来。而夜行一族乃至很多可以自主时间的人宁愿将工作时间定在晚上,据说这样可以取得比白天更高的工作效率。可是当看到他们的工作状态时.我们不禁会暗地佩服他们的勇气和能力,就是在那气压骤降、血压骤升的时段里,他们也一样找到了人生很HIGH的境界。以下十个职业便是夜行族堪称最具快感最过瘾又不乏时尚魅力的职业.我们一起看看他们都在忙些什么……