简介:Basedonuser’sin-degreedistribution,traditionalrankingalgorithmsofuser’sweightusuallyneglecttheconsiderationsofthedifferencesamonguser’sfollowersandthefeaturesofuser’stweets.Inordertoanalyzethefactorswhichimpactonuser’sweight,undertheanalysisofthedatacollectedfromSINAMicroblognetwork,thispaperdiscoversthatuserinfluenceandactivedegreesarethedominantfactorsforthisissue.Theproposedalgorithmevaluatesuserinfluencebyuser’sfollowernumber,theinfluenceofuser’sfollowersandthereciprocitybetweenusers.User’sactivedegreeismodeledbyuser’sparticipationandthequalityofuser’stweets.Themodelsaretestedbydifferentdatagroupstoconfirmtheparametersforthefinalcalculation.Eventually,thispapercomparesthecomputationalresultswiththeuser’srankingordergivenbytheSINAofficialapplication.Theperformanceofthisalgorithmpresentsastrongerstabilityonthefluctuantrangeofthevalueofuser’sweight.
简介:Amonolithicclock-recoverycircuitusedin622Mb/sopticalcommunicationsystemisdesigned,whichisbasedonthephase-lockedlooptheory,,andusesbipolartransistormodel.Itovercomestheshortcomingofclockrecoverymethodbasedonfilter,andimplementsmonolithicclock-recoveryIC.Thedesignedcircuitsincludephaedetector,voltage-controlledoscillatorandloopfilter.Amongthem,thevoltage-controloscillatorisamodifiedtwo-stageringoscillator,whichprovidesquadratureclocksignalsandpresentswidevoltage-controlledrangeandhighvoltage-controllingsensitivity.