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500 个结果
  • 简介:Chemicalmodificationandindustrialutilizationofligninbasedonitsstructurewerereviewedinthispaper.Anditseconomicvalueandsignificanceforthesocietyandenvironmentalprotectionwerealsoevaluated.

  • 标签:
  • 简介:Thepapertriestoexplorecirculareconomyfromtheviewpointofthesystemtheory.Circulareconomyisakindofcomplicatedeconomicactivity,anditisawhollynewecotypeeconomyproposedbyWesterncountriesaftertheyhadsummedupmanyexperiencesandlessonsfromtraditionaleconomy.Itisanentiretyandhasmanylayers.Itkeepsanopenanddynamicbalance.Becausethesystemtheoryisthetheoreticalfoundationofcirculareconomy,weshouldsystemicallyanalyzeandstudycirculareconomyfromthemacroscopicview,correctlygraspitsoperationallaws,improveitsservicefunctions,andrealizehumanbeings'sustainabledevelopment.Thepaperintroducesthecontentandgeneralcharacteristicsofthesystemtheoryandtheideaofcirculareconomy.Thenitanalyzescirculareconomybasedonthesystemtheory.Thepaperconcludesthattheintegrationofcirculareconomyandthesystemtheorycanpromotethefunctionsofcirculareconomy.

  • 标签: 循环经济 发展模式 系统理论 可持续发展
  • 简介:一个二维的数字模型被建议在江苏省从一个发电厂模仿热分泌物。在模型的方程在于oftwo维的非稳定的浅水区方程和热废物搬运方程。Finitevolume方法(FVM)习惯于discretize切开的浅水区方程,和流动差别(FDS)计划被使用。有一样的温度增长的计算区域在海水上显示出热分泌物的效果。在模仿的结果和试验性的数据hows之间的比较好同意。它显示这个方法能在沿海的区域在热传递模拟给高精确。

  • 标签: 数值模拟 热量 有限体积法 潮汐 海岸
  • 简介:Topologicalnamingmechanisminfeature_basedmodelingJunjunWu,TongyangWang,XinfangZhangandJizhouComputerAidedDesignCenter,HuaZhon...

  • 标签: TOPOLOGICAL NAMING feature_based MODELLING ENTITY identification
  • 简介:Toimprovetheaccuracyandeffectivenessofforestpestsforecasting,basedoncurrentforecastmodel,integratingthedatabaseandWebGIStechnology,apracticaldesignandconstructionapproachofforestpestknowledgebasewasputforward,andtheforecastsystemonWebapplicationframeworkwasrealizedwithsatisfactoryempiricalresults.

  • 标签: WEBGIS KNOWLEDGE BASE FOREST PESTS forecasting
  • 简介:Theperformanceofadaptivebeamformingtechniquesislimitedbythenonhomogeneouscluttersce-nario.AnaugmentedKrylovsubspacemethodisproposed,whichutilizesonlyasinglesnapshotofthedataforadaptiveprocessing.ThenovelalgorithmputstogetheradatapreprocessorandadaptiveKrylovsubspacealgo-rithm,wherethedatapreprocessorsuppressesdiscreteinterferenceandtheadaptiveKrylovsubspacealgorithmsuppresseshomogeneousclutter.Thenovelmethodusesasinglesnapshotofthedatareceivedbythearrayantennatogenerateacancellationmatrixthatdoesnotcontainthesignalofinterest(SOI)component,thus,itmitigatestheproblemofhighlynonstationaryclutterenvironmentandithelpstooperateinreal-time.Thebenefitofnotrequiringthetrainingdatacomesatthecostofareduceddegreeoffreedom(DOF)ofthesystem.Simulationillus-tratestheeffectivenessincluttersuppressionandadaptivebeamforming.Thenumericresultsshowgoodagreementwiththeproposedtheorem.

  • 标签: 自适应天线波束赋形技术 KRYLOV子空间 共轭梯度法 非均匀杂波 杂波抑制
  • 简介:Basedonthemeaningofeconomictheoryaswellasanalysisofrelevantcharacteristicsofwatershedenvironmentalmanagement,awatershedenvironmentalmanagementframeworkwillbecreated,withbuildingsystemsoftheory,principles,methods,andsupportingmeasures.Throughthegeneralstructure,thewatershedenvironmentalmanagementsystemdesigncanbeexploredtooptimizetheallocationofresourcesandachievecoordinateddevelopmentofwatershedeconomicgrowthandenvironmentalprotection.

  • 标签: ECONOMIC THEORY WATERSHED ENVIRONMENTAL MANAGEMENT FRAMEWORK
  • 简介:Foridentifyingthetire/roadfrictioncoefficientaccuratelyinreal-timetomeettheneedsofautomobileelectroniccontrolsystemandthenimprovingtheactivesafetyperformanceofautomobile,theroadrecognitionmethodbasedonfuzzycontrolalgorithmwasstudiedinthispaper.Adopta7-DOFvehicledynamicmodel,wheelslipratioλandlongitudinalforcesFxastheinputoffuzzycontrollerwithfuzzyruleswasproposed.Theoutputistheweightcoefficientofμ-λfunctionalexpressionwhichisrelatedtoc1,c2andc3proposedbyBurckhardtetc.Byasimulationexperimentofautomobilebrakeontheconditionofdrivingstraightorveeringonasingleroadanddockingpavement,tosomeextent,indicatesthatthismethodisabletoguaranteethereal-timeandaccuracyoftheroadidentification.

  • 标签: 路面条件 模糊识别 附着特性 汽车电子控制系统 轮胎 模糊控制算法
  • 简介:双光的排水量传感器被介绍与单身者相比获得更高的精确性。系统的结构和原则也被介绍,并且硬件和软件也被引进。系统的函数通过实验是可行的并且基于FPGA模仿数据进程。CLC数字TH822

  • 标签: 位移传感器 对偶光 FPGA 数据处理
  • 简介:InthedevelopedWesternpartoftheworld,theincidenceofGCAhasmarkedlydecreasedoverthepastdecades.ThisdecreaseoftheGCAincidenceseemstobeageneralandglobalevent,suggestingthatoneorsomegloballyandgenerallycommonfactorsplayacriticalroleinthepathogenesisofGCA,andthatthisfactororfactorshavedecreasedininfluenceworldwidelyduringthepastdecades.Theseetiopathogeneticfactorshardlyareexoticdifferencesinlocalhabitsofeatingordrinkingonly.SuchexoticandlocalfactorscannotexplainthestrikingconsistencythatisapparentintheglobalepidemiologyofGCA.RegardingtheH.pyloriinfectionasthekeyfactorinthepathogenesisofgastriccancer,theserequirementsofglobalityarefulfilled.

  • 标签: 性别 发病机理 胃癌 肿瘤 消化系统 GCA
  • 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。

  • 标签: 稀疏表示 视觉跟踪 子空间 PCA 主成分分析 全局最小值
  • 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.

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  • 简介:MotionEstimationBasedonGlobalandLocaCompensabilityAnalysisTXMotionEstimationBasedonGlobalandLocalCompensabilityAnalysisFanJin...

  • 标签: :Motion ESTIMATION algorithm FRAME DIFFERENCE CONTRAST
  • 简介:Basedondiscretewavelettransform,bothrelativewaveletenergy(RWE)andsegmentwaveletentropy(SWE)ofelectroencephalogram(EEG)aredefinedinthispaper.TheRWEprovidesquantitativelytheinformationabouttherelativeenergyassociatedwithdifferentfrequencybandspresentintheEEG.TheSWEcarriesinformationaboutthedegreeoforderordisorderassociatedwithdifferenttimesegmentofEEGevolution,whichcandeterminethetime-segmentlocalizationsofabnormaldynamicprocessesofbrainactivityduetothelocalizationcharacteristicsofthewavelettransform.TheexperimentalresultsshowthattheRWEandSWEaredifferentbetweenepilepticEEGsandnormalEEGs,whichdemonstratethattheRWEandtheSWEarehelpfultoanalyzethedynamicbehaviorofdifferentEEGs.

  • 标签: 脑电图 小波熵 离散小波变换 频谱 小波能量 活动异常
  • 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.

  • 标签: 通信技术 CDMA 码分多址 信号分类 多路径通道