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  • 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。

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  • 简介:Thecomputationalproblemsoftwospecialdeterminantsareinvestigated.Thosedeterminantsappearintheconstructionofthefunction-valuedPade-typeapproximationforcomputingFredholmintegralequationofthesecondkind.Themaintooltobeusedinthispaperisthewell-knownSchurcomplementtheorem.

  • 标签: 函数值Padé逼近 计算问题 行列式 Schur余角定理
  • 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.

  • 标签: 地震 成因分析 地层学 地球构造
  • 简介:这款车是一辆全自动车,捷豹的客户可以按需叫车,这是一辆应对电动、共享、互联的未来而设计的汽车.它最特别的地方,是它的智能互联方向盘.它可以放置在你的家中,成为你最忠实的伙伴.Sayer是第一款用语音启动的人工智能方向盘,它可以执行多项任务,这是以E-type设计者的名字来命名的.它可以用来叫车、播放音乐、餐厅定位,它甚至可以知道你的冰箱里有什么.你可以加入提供按需叫车服务的俱乐部,一旦成为了它的成员,可以独享一辆车,也可以与同一社区的他人分享一辆车,而且用户并不需要把车停在家里,只要把方向盘放在家里就可以了.

  • 标签: 捷豹概念车
  • 简介:1.IntroductionAnimportsnttopicinQualityColltrolisthestudyofacceptancesamplingplan.Foravariablesamplingplan,thequalityofanitemismeasuredbyarandomvariable.Todesignavariablesamplingplanistodeterminethesamplesizeandthespecilicstionlicit(s).Manyschemeshav...

  • 标签: Single sampling PLAN the Weibull distribution
  • 简介:Inthispaper,thevariablecofficientKdVequationwithdissipativelossandnonuniformitytermsandthevariablecoefficientSGequationwithnonuniformitytermarestudied.TheexactsolutionsoftheKdVandSGequationsareobtained.Inparticular,thesolitonsolutionsoftwoequationsarefound.

  • 标签: 精确解 变量系数 KDV 偏微分方程
  • 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.

  • 标签: DELAY REACTION-DIFFUSION DIFFERENCE equations Nentral type
  • 简介:微生物引起的房间,在免费或使金属离子,器官、无机的xenobiotics或生物学上活跃的混合物的preconcentration或移动不能调动的形式的任何一个,能被用于。这些房间的磁性的修正启用准备能容易在difficult-to-handle样品被操作的磁性的吸附物,例如暂停,面对外部磁场。在这评论,微生物引起的房间的磁性的修正的典型例子被举,以及他们为器官的xenobiotics和重金属离子的分离的可能的应用。

  • 标签: 磁力吸附剂 磁改性 微生物细胞 磁流体
  • 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.

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  • 简介:Thetypeselectionofburningequipmentforboilersisaffectedsignificantlybytheslaggingcharacteristicsofcoal.Basedontheengineeringstatisticsmethod,thedesignedfurnaceparametersareobtainedfromthe600-MWand1000-MWboilerswithtangentialfiringandwallfiring.Thepowerandarrangementoftheburnersareanalyzed.Theirimpactsonslaggingonheatingsurfacesandthecarboncontentsintheashandcindersarealsodiscussed.Thermalparametersoffurnacearerecommendedforboilersof600MWand1000MWfiringslaggingcoalinthedesign.Thestaticorrotaryclassifiershouldbethefirstchoiceforthepulverizingsystem.

  • 标签: 燃煤锅炉 燃烧设备 结渣特性 选型 统计方法 切圆燃烧
  • 简介:Chargedcentersexistinthephosphorlayerofthecommonthinfilmelectroluminescentdevices.Inthisarticle,electronscatteringprocessduetothesecentersisstudiedthroughphaseshiftanalysis.Thescatteringratesindifferentcasesareobtainedandcomparedwithotherimportantscatteringprocesses.ElectrontransportprocessedunderdifferentchargedcentrersconditionsaresimulatedbymeansofMonteCarlomethod.Thequantitativeresultsabouttheinfluenceofchargedcentersonelectronenergyareobtained.

  • 标签: 电致发光 硫化锌 分散 电荷中心
  • 简介:Theradialvibrationcharacteristicofanannularultrasonicconcentratorwithmultislitsisstudied.Basedontheelectro-mechanicalanalogyandbyintroducinganarearatiocoefficient,theradialvibrationalequivalentcircuitandthefrequencyequationoftheconcentratorarederived.Theradialdisplacementamplitudemagnificationfactorofitisobtained.Bynumericalcalculating,therelationshipbetweentheradialdisplacementamplitudemagnificationfactor,theresonancefrequencyoftheconcentratoratthefirstandsecondresonanceanditsradiusratioareinvestigated.Also,therelationshipbetweentheradialdisplacementamplitudemagnificationfactor,theresonancefrequencyoftheconcentratorandthelength,theangleandthenumberofthesiltsareanalyzed.Itisillustratedthatamaximumofdisplacementamplitudemagnificationfactoroftheconcentratorappearswiththeincreaseoftheradiusratio,andtheamplitudemagnificationfactorincreaseasthelength,theangleandthenumberofthesiltsincrease,whiletheradialresonancefrequencyoftheconcentratordecreasesasthelength,theangleandthenumberofthesiltsincrease.ThetheoreticalresonancefrequenciesareingoodagreementwiththatoftheFEMsimulationsandmeasurement.

  • 标签: 径向振动 超声波 狭缝式 共振频率 环型 位移振幅
  • 简介:AcomplexmatrixAissaidtobeamatrixrealizationofthedigraphDifDistheassociateddigraphofA,andAissaidtohavethepropertyBifeverysingularvalueofAiscontainedintheunionofBrualdi-typeintervals.AdigraphDissaidtobeaforcibleB-digraphifeverymatrixrealizationofDhasthepropertyB.Inthispaper,wegiveasufficientconditionforamatrixtohavethepropertyBandcharacterizetheforcibleB-digraphs.

  • 标签: DIGRAPH matrix realization singular value INCLUSION