简介:AnalgorithmbasedoneigenanalysistechniqueandWalsh-Hadamardtransform(WHT)isproposed.Thealgorithmcontainstwosteps.Firstly,thereceivedsequenceisdividedintotemporalwindows,andacovariancematrixiscomputed.Thelinearfeedbackshiftregister(LFSR)sequenceisreconstructedfromthefirsteigenvectorofthismatrix.Secondly,equationsaccordingtotherecoveredLFSRsequenceareconstructed,andtheWalshspectrumcorrespondingtotheequationsiscomputed.ThefeedbackpolynomialofLFSRisestimatedfromtheWalshspectrum.Thevalidityofthealgorithmisverifiedbythesimulationresult.Finally,casestudiesarepresentedtoillustratetheperformanceoftheblindreconstructionmethod.
简介:ChampaTrinleywasbornofapeasant’sfamilyinLhasa,capitalofTibet,in1954.Healthyandlovely,thebabybroughtgreatjoytothefamily.Butwhenhewassixyearsold,aseriousdiseasemadehimblindinbotheyes.Despiteseeingnothing,Champalearnedtodofarmwork.Everydayheworkedinthefieldslikeeveryoneelse.Asidefromcompletingwhatworkwasassignedhimbytheproductionteam,hejoinedthelocalyouthshockbrigadeand,asamemberofthebrigade,viedwithoth-
简介:Thispapergivesthedefinitionandoperationsofblindnumber,anddiscussesitsoperationproperties.Blindnumberisamathematicaltooltoexpressanddealwithcomplexinformationwithseveralkindsofuncertainty.
简介:网膜的退化疾病可以导致外部视网膜并且接着的退化,盲目。但由于内部视网膜的维护,编码并且处理视觉神经原回答仍然能自然地被执行。因此,一台有效网膜的修复术设备可以被mimicking开发外部视网膜的功能:把视觉光变成人工的刺激并且把刺激送到试图唤起神经回答的视网膜。作为为当前的网膜的修复术的二个主要发展中方向,epiretinal(嗯)并且subretinal(SR)修复术两个都正在经历试验性的舞台并且拥有优点和限制。在电源供应的进一步的调查,biocompatibility,仍然要求的etc.are。另外,尽管他们不是足够成熟的也商业地被使用,suprachoroidaltransretinal刺激(圣)和在网膜的修复术的一些另外的选择也被看作有希望的导致neurotransmitter的刺激研究方向。
简介:Ihadneverexpectedtoenteraworldofpeoplewhocan'tseeuntilonasummerafternoonIcametoatrain-ingcampfortheminBeijing.Idecidedtoserveasavolunteerthereandspent15dayswiththemasareporter.WhenIlearnedabouttheopportunitytocoverthelaunchofabroadcasttrainingcampforblindpeople,Itoldmyselfitmustbeanunusualevent.ButIneverexpectedIcouldbesotouchedwhenIsteppedintothecampstudiolocatedinanapartmentbuildinginsouthernBeijing.
简介:Period:March2nd-April8thHours:Tuesday-Sunday10amto5pm(ClosedMondays)Venue:F2,3,ZhuQizhanArtMuseumAddress:580OuyangRoad,HongKouDistrictShanghaiWebsite:www.zmusueum.org
简介:TherearetwomajorapproachesforBlindSignalSeparation(BSS)problem:MaximumEntropy(ME)andMinimumMutualInformation(MMI)algorithms.BasedontherecursivearchitectureandtherelationshipbetweentheMEandMMIalgorithms,anExtendedME(EME)algorithmisproposedbyusingprobabilitydensityfunction(pdf)estimationoftheoutputstodeducethecorrespondingiterativeformulasinBSS.Basedonthesimulationresults,itcanbeconcludedthattheproposedalgorithmhasbetterperformancesthanthetraditionalMEalgorithminconvolutemixtureBSSproblems.
简介:Inthispaper,weputforwardaweakblindquantumsignatureschemebasedonquantumentanglementswappingofBellstates.Differentfromtheexistingquantumsignatureschemes,ourschemecanoffertwo-stepverificationsecurityservicestoensurethevalidityoftheverification.Inordertoguaranteetheunconditionalsecurityofthescheme,thequantumkeydistributionprotocolandone-timepadencryptionalgorithmareemployedinourscheme.Besides,theentanglementswappingofBellstatesmechanismenhancesthesecurityofverificationcriteria.Theproposedschemehasthepropertiesofnonforgeability,nonrepudiation,lindness,andtraceability.