简介:当二项式的系数被一般的代替时,在这份报纸,我们在情况中学习伯恩斯坦操作员的顺序令人满意一条类似的递归的规则。除集中的描述和以这种方式获得的操作符的顺序的近似性质以外,主要应用程序考虑合适的秒顺序的解决方案的近似寓言的问题。
简介:Thecomputationalproblemsoftwospecialdeterminantsareinvestigated.Thosedeterminantsappearintheconstructionofthefunction-valuedPade-typeapproximationforcomputingFredholmintegralequationofthesecondkind.Themaintooltobeusedinthispaperisthewell-knownSchurcomplementtheorem.
简介:AsimplifiedfragilityanalysisoffantypecablestayedbridgesusingProbabilisticRiskAnalysis(PRA)procedureispresentedfordeterminingtheirfailureprobabilityunderrandomgroundmotion.Seismicinputtothebridgesupportisconsideredtobeariskconsistentresponsespectrumwhichisobtainedfromaseparateanalysis.Fortheresponseanalysis,thebridgedeckismodeledasabeamsupportedonspringsatdifferentpoints.Thestiffnessesofthespringsaredeterminedbyaseparate2Dstaticanalysisofcable-tower-decksystem.Theanalysisprovidesacoupledstiffnessmatrixforthespringsystem.Acontinuummethodofanalysisusingdynamicstiffnessisusedtodeterminethedynamicpropertiesofthebridges.Theresponseofthebridgedeckisobtainedbytheresponsespectrummethodofanalysisasappliedtomultidegreeoffreedomsystemwhichdulytakesintoaccountthequasi-staticcomponentofbridgedeckvibration.Thefragilityanalysisincludesuncertaintiesarisingduetothevariationingroundmotion,materialproperty,modeling,methodofanalysis,ductilityfactoranddamageconcentrationeffect.ProbabilityoffailureofthebridgedeckisdeterminedbytheFirstOrderSecondMoment(FOSM)methodofreliability.Athreespandoubleplanesymmetricalfantypecablestayedbridgeoftotalspan689m,isusedasanillustrativeexample.Thefragilitycurvesforthebridgedeckfailureareobtainedunderanumberofparametricvariations.Someoftheimportantconclusionsofthestudyindicatethat(i)notonlyverticalcomponentbutalsothehorizontalcomponentofgroundmotionhasconsiderableeffectontheprobabilityoffailure;(ii)groundmotionwithnotimelagbetweensupportexcitationsprovidesasmallerprobabilityoffailureascomparedtogroundmotionwithverylargetimelagbetweensupportexcitation;and(iii)probabilityoffailuremayconsiderablyincreaseforsoftsoilcondition.
简介:ForthecommutatorsofmultilinearCalder′on-ZygmundsingularintegraloperatorswithBMOfunctions,theweaktypeweightednorminequalitieswithrespecttoAPweightsareobtained.
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简介:1.IntroductionAnimportsnttopicinQualityColltrolisthestudyofacceptancesamplingplan.Foravariablesamplingplan,thequalityofanitemismeasuredbyarandomvariable.Todesignavariablesamplingplanistodeterminethesamplesizeandthespecilicstionlicit(s).Manyschemeshav...
简介:<正>Inthispaper,wefirstconsideradelaydifferenceequationofneutraltypeoftheform:Δ(yn+pyn-k)+qnyn-=0forn∈Z+(0)(1*)andgiveadifferentconditionfromthatofYuandWang(FunkcialEkvac,1994,37(2):241248)toguaranteethateverynon-oscillatorysolutionof(1*)withp=1tendstozeroasn→∞Moreover,weconsideradelayreaction-diffusiondifferenceequationofneutraltypeoftheform:Δ1(un,m+pun-k,m+qn,mun-m=a2Δ22un+1,m-1for(n,m)∈Z+(0)×Ω.(2*)studyvariouscasksofpintheneutraltermandobtainthatifp≥-1theneverynon-oscillatorysolutionof(2*)tendsuniformlyinm∈Ωtozeroasn→∞:ifp=-1theneverysolutionof(2*)oscillatesandifp<-1theneverynon-oscillatorysolutionof(2*)goesuniformlyinm∈Ωtoinfinityorminusinfinityasn→∞undersomehypotheses.
简介:Objective:Toinvestigatetherelationshipbetweengenemutationandpathologicaltypeoflungcancer,inspectandverifytheconsistencybetweenhomologousgenesmutationinvariouspathologictype.Methods:CombinedwiththeCOSMICandUniProtdatabase,weobtainedthereportedoverallbig-samplemutationdataoflungcancerandtheproteinsequencesofthetop20mutatedgenes,respectively.Analyzethedataandclustertheproteinsequencesandthendeducethehomologousgene.Ultimately,analyzethemutationsofdifferentpathologicaltypesofhomologousgenes.Results:TP53(32.32%)hasthehighestmutationrateinlungcancer,followedbyEGFR(29.12%).Thecopynumbervariability(CNV)ofgenes:KRAS,LRP1B,CDKN2A,KMT2C,FAT1,PIK3CA,RB1,ERBB4,GRIN2AandKDRbetweeneachpathologicaltypeisstaticallysignificant(P<0.05).ThegenedifferentialexpressionratebetweenadenocarcinomaandsquamouscarcinomaofgeneTP53,KRAS,LRP1B,CDKN2A,STK11,FAT4,KMT2D,NFE2L2,KEAP1,PIK3CA,RB1,ERBB4,SMARCA4andKDRarestatisticallysignificant(P<0.05).ThesimilarityoftheproteinsequenceofEGFRandERBB4canreach93%,andFAT4andFAT1are81%.Forsmallcellcarcinoma,there’snodifferenceinCNVbetweenthetwogroupsofhomologousgenes,andnodifferencebetweenFAT4andFAT1inadenocarcinoma.Conclusion:TheCNVandgeneexpressionoflungcancer-associatedgenesarerelevanttopathologictypes.GFRandERBB4arehomologous,FAT4andFAT1arealsoamongthetop20mutationgenes.Additionally,there’snodifferenceinCNVbetweenthetwogroupsofsmallcellcarcinoma,whichisthesamebetweenFAT4andFAT1inadenocarcinoma.
简介:Thetypeselectionofburningequipmentforboilersisaffectedsignificantlybytheslaggingcharacteristicsofcoal.Basedontheengineeringstatisticsmethod,thedesignedfurnaceparametersareobtainedfromthe600-MWand1000-MWboilerswithtangentialfiringandwallfiring.Thepowerandarrangementoftheburnersareanalyzed.Theirimpactsonslaggingonheatingsurfacesandthecarboncontentsintheashandcindersarealsodiscussed.Thermalparametersoffurnacearerecommendedforboilersof600MWand1000MWfiringslaggingcoalinthedesign.Thestaticorrotaryclassifiershouldbethefirstchoiceforthepulverizingsystem.
简介:Chargedcentersexistinthephosphorlayerofthecommonthinfilmelectroluminescentdevices.Inthisarticle,electronscatteringprocessduetothesecentersisstudiedthroughphaseshiftanalysis.Thescatteringratesindifferentcasesareobtainedandcomparedwithotherimportantscatteringprocesses.ElectrontransportprocessedunderdifferentchargedcentrersconditionsaresimulatedbymeansofMonteCarlomethod.Thequantitativeresultsabouttheinfluenceofchargedcentersonelectronenergyareobtained.
简介:Theradialvibrationcharacteristicofanannularultrasonicconcentratorwithmultislitsisstudied.Basedontheelectro-mechanicalanalogyandbyintroducinganarearatiocoefficient,theradialvibrationalequivalentcircuitandthefrequencyequationoftheconcentratorarederived.Theradialdisplacementamplitudemagnificationfactorofitisobtained.Bynumericalcalculating,therelationshipbetweentheradialdisplacementamplitudemagnificationfactor,theresonancefrequencyoftheconcentratoratthefirstandsecondresonanceanditsradiusratioareinvestigated.Also,therelationshipbetweentheradialdisplacementamplitudemagnificationfactor,theresonancefrequencyoftheconcentratorandthelength,theangleandthenumberofthesiltsareanalyzed.Itisillustratedthatamaximumofdisplacementamplitudemagnificationfactoroftheconcentratorappearswiththeincreaseoftheradiusratio,andtheamplitudemagnificationfactorincreaseasthelength,theangleandthenumberofthesiltsincrease,whiletheradialresonancefrequencyoftheconcentratordecreasesasthelength,theangleandthenumberofthesiltsincrease.ThetheoreticalresonancefrequenciesareingoodagreementwiththatoftheFEMsimulationsandmeasurement.
简介:AcomplexmatrixAissaidtobeamatrixrealizationofthedigraphDifDistheassociateddigraphofA,andAissaidtohavethepropertyBifeverysingularvalueofAiscontainedintheunionofBrualdi-typeintervals.AdigraphDissaidtobeaforcibleB-digraphifeverymatrixrealizationofDhasthepropertyB.Inthispaper,wegiveasufficientconditionforamatrixtohavethepropertyBandcharacterizetheforcibleB-digraphs.