简介：AbstractIreflectuponthedevelopmentofnonlineartimeseriesanalysissince1990byfocusingonfivemajorareasofdevelopment.Theseareasincludetheinterfacebetweennonlineartimeseriesanalysisandchaos,thenonparametric/semiparametricapproach,nonlinearstatespacemodelling,financialtimeseriesandnonlinearmodellingofpanelsoftimeseries.

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简介：AbstractBackground:Piriformis syndrome accounts for approximately 6% of patients who present with sciatic pain. There are many treatment options ranging from physical therapy, to trigger point injections, to surgical intervention. We discuss a surgical method that represents a minimally invasive technique for the treatment of piriformis syndrome.Methods:We describe a novel operative approach and technique for release of the piriformis muscle in the treatment of piriformis syndrome. Described are the preoperative planning, incision and approach, and technique for identifying and releasing the piriformis muscle.Results:Three patients were treated for piriformis syndrome using the described technique. Each patient displayed successful relief of their symptoms immediately following the surgical procedure and at delayed follow-up.Conclusion:Early experience with our method of piriformis release suggests that it is well suited for the treatment of piriformis syndrome. The novel integration of pre-operative trigger point localization coupled with intraoperative neuromonitoring allows effective pain relief with minimal morbidity.

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简介：Thispapergivesthedegreeofapproximationoffunctionofboundedvariationbythepartialsumsofcon-jngateLegendre-FourierSeries.

简介：AbstractPurpose:To explore the diagnosis and treatment of traumatic external carotid branch pseudoaneurysms.Methods:Eleven cases of traumatic external carotid artery branch pseudoaneurysms were admitted in our hospital. Digital subtraction angiography was performed in all patients. It revealed that the pseudoaneurysms originated from the internal maxillary artery in 5 cases, superficial temporal artery in 5 cases and occipital artery in 1 case. Five cases of internal maxillary artery pseudoaneurysms and 2 cases of superficial temporal artery pseudoaneurysms were treated by embolization; the other 3 cases were surgically resected.Results:Complete cessation of nasal bleeding was achieved in all the 5 pseudoaneurysms of internal maxillary artery after the endovascular therapies. Scalp bleeding stopped and scalp defect healed up in 2 patients with superficial temporal artery pseudoaneurysms treated by interventional therapy. All patients were followed up for 0.5-2.0 years without recurrence of nosebleed and scalp lump.Conclusion:For patients with repeated severe epistaxis after craniocerebral injury, digital subtraction angiography should be performed as soon as possible to confirm traumatic pseudoaneurysm. Endovascular therapy is an effective method for traumatic internal maxillary artery pseudoaneurysms. For patients with scalp injuries and pulsatile lumps, further examinations including digital subtraction angiography should be performed to confirm the diagnosis. Surgical treatment or endovascular therapy for scalp traumatic pseudoaneurysm is effective.

简介：Forestgrowthismainlycurrentlymonitoredusingin-situmeasurementsinnortheastofChina.Toeffectivelymonitorforestgrowthdisturbanceatlargescale,weattemptedtouseremotesensingtechnique,particularly,timeseriesMODISdatafrom2004to2006.Theannualtimeseriesof8-dayenhancedvegetationindex(EVI)datasetwasgeneratedandsmoothedusingaSavitzky-Golayfilter.TheEVItrajectoryduringgrowthseasonwassimulatedusingalogisticmodel.Fromthesimulatedtrajectory,theEVIareaofgrowthseasonandannualEVIentropywerecalculated.Thesetwofactorswerecombinedtomapthedisturbanceregionsofforestgrowth.Finally,thedisturbanceregionswereverifiedusingasetofrandomsamples.Theresultindicatesthatthedisturbancepointshavedistinctivelyhigherentropyandlowerpeak.SomeofthesepointsalsoshowabruptEVIdeclineduringthemidseasonofthepeakphasesordoublepeaks.Thisapproachisdemonstratedtobefeasiblefordisturbancemonitoringofforestgrowth.

简介：Detectionandclarificationofcause-effectrelationshipsamongvariablesisanimportantproblemintimeseriesanalysis.Thispaperprovidesamethodthatemploysbothmutualinformationandconditionalmutualinformationtoidentifythecausalstructureofmultivariatetimeseriescausalgraphicalmodels.Athree-stepprocedureisdevelopedtolearnthecontemporaneousandthelaggedcausalrelationshipsoftimeseriescausalgraphs.Contrarytoconventionalconstraint-basedalgorithm,theproposedalgorithmdoesnotinvolveanyspecialkindsofdistributionandisnonparametric.Thesepropertiesareespeciallyappealingforinferenceoftimeseriescausalgraphswhenthepriorknowledgeaboutthedatamodelisnotavailable.Simulationsandcaseanalysisdemonstratetheeffectivenessofthemethod.

简介：Thechaoticcharacteristicsoftimeseriesoffivepartialdischarge(PD)patternsinoil-paperinsulationarestudied.TheresultsverifyobviouschaoticcharacteristicofthetimeseriesofdischargesignalsandthefactthatPDisachaoticprocess.Thesetimeserieshavedistinctivefeatures,andthechaoticattractorsobtainedfromtimeseriesdifferedgreatlyfromeachotherbyshapesinthephasespace,sotheycouldbeusedtoqualitativelyidentifythePDpatterns.Thephasespaceparametersareselected,thenthechaoticcharacteristicquantitiescanbeextracted.ThesequantitiescouldquantificationallycharacterizethePDpatterns.TheeffectsonpatternrecognitionofPRPDandCAPDarecomparedbyusingtheneuralnetworkofradialbasisfunction.Theresultsshowthatbothofthetworecognitionmethodsworkwellandhavetheirrespectiveadvantages.Then,boththestatisticaloperatorsunderPRPDmodeandthechaoticcharacteristicquantitiesunderCAPDmodeareselectedcomprehensivelyastheinputvectorsofneuralnetwork,andthePDpatternrecognitionaccuracyistherebygreatlyimproved.

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简介：Ageneralizationofsemiprimeringsandrightp.q.-Baerrings,whichwecallquasi-Armendarizringsofdifferentialinversepowerseriestype(orsimply,DTPS-quasi-Armendariz),isintroducedandstudied.ItisshownthattheDTPS-quasi-Armendarizringsareclosedunderdirectsums,uppertriangularmatrixrings,fullmatrixringsandMoritainvariance.Variousclassesofnon-semiprimeDTPS-quasi-Armendarizringsareprovided,andanumberofpropertiesofthisgeneralizationareestablished.SomecharacterizationsforthedifferentialinversepowerseriesringR[[x^-1;δ]]tobequasi-Baer,generalizedquasi-Baer,primary,nilary,reflexive,ideal-symmetricandleftAIPareconncluded,whereδisaderivationontheringR.Finally,miscellaneousexamplestoillustrateanddelimitthetheoryaregiven.

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简介：The(Nrlund)logarithmicmeansoftheFourierseriesoftheintegrablefunctionfis:1/l_nsumfromk=1ton-1S_k(f)/(n-k),wherel_n:=sumfromk=1ton-11/kInthispaperwediscusssomeconvergenceanddivergencepropertiesofthislogarithmicmeansoftheWalsh-Fourierseriesoffunctionsintheuniform,andintheL~1Lebesguenorm.Amongothers,asanapplicationofourdivergenceresultswegiveanegativeanswertoaquestionofMóriczconcerningtheconvergenceoflogarithmicmeansinnorm.

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简介：这份报纸建议我们叫作鈥渟egregated预言鈥?预言是nonstationary的气候时间系列的一条新途径。这条途径基于实验模式分解方法(EMD)，它能分解一时间信号进基本摆动的部件的一个有限、通常小的数字。到这的能力接近的测试，一些预言实验为几个气候时间系列被执行。试验性的结果证明这条途径能分解气候时间系列的nonstationarity并且分离在不同模式部件之间的非线性的相互作用，它从而能改进这些原来的气候时间系列的预言精确性。关键词EMD-nonstationarity-非线性的系统-气候预言-时间系列预言

简介：Inthepaper,generalizedordersandgeneralizedtypesofDirichletseriesintherighthalf-planearegiven.Someinterestingrelationshipsonmaximummodulus,themaximumtermandthecoefficientsofentirefunctiondefinedbyDirichletseriesofintherighthalf-planeareobtained.