简介:Chemicalmodificationandindustrialutilizationofligninbasedonitsstructurewerereviewedinthispaper.Anditseconomicvalueandsignificanceforthesocietyandenvironmentalprotectionwerealsoevaluated.
简介:Thepapertriestoexplorecirculareconomyfromtheviewpointofthesystemtheory.Circulareconomyisakindofcomplicatedeconomicactivity,anditisawhollynewecotypeeconomyproposedbyWesterncountriesaftertheyhadsummedupmanyexperiencesandlessonsfromtraditionaleconomy.Itisanentiretyandhasmanylayers.Itkeepsanopenanddynamicbalance.Becausethesystemtheoryisthetheoreticalfoundationofcirculareconomy,weshouldsystemicallyanalyzeandstudycirculareconomyfromthemacroscopicview,correctlygraspitsoperationallaws,improveitsservicefunctions,andrealizehumanbeings'sustainabledevelopment.Thepaperintroducesthecontentandgeneralcharacteristicsofthesystemtheoryandtheideaofcirculareconomy.Thenitanalyzescirculareconomybasedonthesystemtheory.Thepaperconcludesthattheintegrationofcirculareconomyandthesystemtheorycanpromotethefunctionsofcirculareconomy.
简介:Topologicalnamingmechanisminfeature_basedmodelingJunjunWu,TongyangWang,XinfangZhangandJizhouComputerAidedDesignCenter,HuaZhon...
简介:Toimprovetheaccuracyandeffectivenessofforestpestsforecasting,basedoncurrentforecastmodel,integratingthedatabaseandWebGIStechnology,apracticaldesignandconstructionapproachofforestpestknowledgebasewasputforward,andtheforecastsystemonWebapplicationframeworkwasrealizedwithsatisfactoryempiricalresults.
简介:Theperformanceofadaptivebeamformingtechniquesislimitedbythenonhomogeneouscluttersce-nario.AnaugmentedKrylovsubspacemethodisproposed,whichutilizesonlyasinglesnapshotofthedataforadaptiveprocessing.ThenovelalgorithmputstogetheradatapreprocessorandadaptiveKrylovsubspacealgo-rithm,wherethedatapreprocessorsuppressesdiscreteinterferenceandtheadaptiveKrylovsubspacealgorithmsuppresseshomogeneousclutter.Thenovelmethodusesasinglesnapshotofthedatareceivedbythearrayantennatogenerateacancellationmatrixthatdoesnotcontainthesignalofinterest(SOI)component,thus,itmitigatestheproblemofhighlynonstationaryclutterenvironmentandithelpstooperateinreal-time.Thebenefitofnotrequiringthetrainingdatacomesatthecostofareduceddegreeoffreedom(DOF)ofthesystem.Simulationillus-tratestheeffectivenessincluttersuppressionandadaptivebeamforming.Thenumericresultsshowgoodagreementwiththeproposedtheorem.
简介:Basedonthemeaningofeconomictheoryaswellasanalysisofrelevantcharacteristicsofwatershedenvironmentalmanagement,awatershedenvironmentalmanagementframeworkwillbecreated,withbuildingsystemsoftheory,principles,methods,andsupportingmeasures.Throughthegeneralstructure,thewatershedenvironmentalmanagementsystemdesigncanbeexploredtooptimizetheallocationofresourcesandachievecoordinateddevelopmentofwatershedeconomicgrowthandenvironmentalprotection.
简介:Foridentifyingthetire/roadfrictioncoefficientaccuratelyinreal-timetomeettheneedsofautomobileelectroniccontrolsystemandthenimprovingtheactivesafetyperformanceofautomobile,theroadrecognitionmethodbasedonfuzzycontrolalgorithmwasstudiedinthispaper.Adopta7-DOFvehicledynamicmodel,wheelslipratioλandlongitudinalforcesFxastheinputoffuzzycontrollerwithfuzzyruleswasproposed.Theoutputistheweightcoefficientofμ-λfunctionalexpressionwhichisrelatedtoc1,c2andc3proposedbyBurckhardtetc.Byasimulationexperimentofautomobilebrakeontheconditionofdrivingstraightorveeringonasingleroadanddockingpavement,tosomeextent,indicatesthatthismethodisabletoguaranteethereal-timeandaccuracyoftheroadidentification.
简介:InthedevelopedWesternpartoftheworld,theincidenceofGCAhasmarkedlydecreasedoverthepastdecades.ThisdecreaseoftheGCAincidenceseemstobeageneralandglobalevent,suggestingthatoneorsomegloballyandgenerallycommonfactorsplayacriticalroleinthepathogenesisofGCA,andthatthisfactororfactorshavedecreasedininfluenceworldwidelyduringthepastdecades.Theseetiopathogeneticfactorshardlyareexoticdifferencesinlocalhabitsofeatingordrinkingonly.SuchexoticandlocalfactorscannotexplainthestrikingconsistencythatisapparentintheglobalepidemiologyofGCA.RegardingtheH.pyloriinfectionasthekeyfactorinthepathogenesisofgastriccancer,theserequirementsofglobalityarefulfilled.
简介:我们构造稀少的表示和subspace表示的一个合作模型。首先,我们代表追踪在原则部件分析(PCA)指向subspace,然后我们采用L1规则化限制剩余学期的稀少,限制表示系数的稀少的一个L2规则化学期,并且限制在重建和目标之间的距离的一个L2标准。然后,我们在粒子过滤器框架实现算法。而且,一个反复的方法被介绍得到剩余和系数的全球最小。最后,一个其他的模板更改计划被采用避免被不精密的更改引起的追踪的飘移。在实验,我们在9个序列上测试算法,并且把结果与5个state-of-art方法作比较。根据结果,我们能断定我们的算法比另外的方法更柔韧。
简介:Osteosarcomaisprimarymalignantneoplasmsderivedfromcellsofmesenchymalorigin,andoftenhasdistinctphenotypesatdifferentstages.Thelocationoftumorandreactionzonecanbeidentifiedbyanexpertinmagneticresonanceimaging(MRI),withMRIbeingoneofthechoicesforevaluatingtheextentofosteosarcoma.However,itisstillachallengetoautomaticallyextracttumorfromitssurroundingtissuesbecauseoftheirlowintensitydifferencesinMRI.WeinvestigatedanapproachbasedonZernikemomentandsupportvectormachine(SVM)forosteosarcomasegmentationinT1-weightedimage(TIWI).Firstly,thedifferentordermomentsaroundeachpixelarecalculatedinsmallwindows.Secondly,thegrayscaleandthemodulevaluesofdifferentordermomentsareusedasatexturefeaturevectorwhichisthenusedasthetrainingsetforSVM.Finally,anSVMclassifieristrainedbasedonthissetoffeaturestoidentifytheosteosarcoma,andthesegmentedtumortissueisrenderedin3Dbytheraycastingalgorithmbasedongraphicsprocessingunit(GPU).TheperformanceofthemethodisvalidatedonT1WI,showingthatthesegmentationmethodhasahighsimilarityindexwiththeexpert’smanualsegmentation.
简介:MotionEstimationBasedonGlobalandLocaCompensabilityAnalysisTXMotionEstimationBasedonGlobalandLocalCompensabilityAnalysisFanJin...
简介:Basedondiscretewavelettransform,bothrelativewaveletenergy(RWE)andsegmentwaveletentropy(SWE)ofelectroencephalogram(EEG)aredefinedinthispaper.TheRWEprovidesquantitativelytheinformationabouttherelativeenergyassociatedwithdifferentfrequencybandspresentintheEEG.TheSWEcarriesinformationaboutthedegreeoforderordisorderassociatedwithdifferenttimesegmentofEEGevolution,whichcandeterminethetime-segmentlocalizationsofabnormaldynamicprocessesofbrainactivityduetothelocalizationcharacteristicsofthewavelettransform.TheexperimentalresultsshowthattheRWEandSWEaredifferentbetweenepilepticEEGsandnormalEEGs,whichdemonstratethattheRWEandtheSWEarehelpfultoanalyzethedynamicbehaviorofdifferentEEGs.
简介:Toavoidtheinaccurateestimationoftheactiveuser'snumberandthecorrespondingperformancedegradation,anovelPOR-basedUserIdentificationDetector(UID)isproposedfortheCodeDivisionMultipleAccess(CDMA)systems.ThenewdetectoradoptsthePowerofR(POR)techniqueandtheMultipleSignalClassification(MUSIC)method,whichdoesnotrequiretheestimationofactiveusers'number,andobtainslowerfalsealarmprobabilitythanthesubspace-basedUIDinthemultipathchannels.However,fromouranalysis,increasingtheordermdoesnotimprovetheperformance.Therefore,whenmisone,theperformanceofthenewdetectorismaximal.