简介:摘要:DF11Z型机车是为满足铁路专运及特殊客运列车牵引任务的需要而研发的准高速内燃机车,而6A系统对于DF11Z机车来说是机车性能监测的重要组成部分,对于机车的制动系统、防火系统、走行部系统等实时监测并报警,保证了机车的运行安全。
简介:TheauthorsmainlyconcernthesetUfofc∈Csuchthatthepowerdeformationzf(z)/zcisunivalentintheunitdisk|z|<1foragivenanalyticunivalentfunctionf(z)=z+a2z2+···intheunitdisk.ItisshownthatUfisacompact,polynomiallyconvexsubsetofthecomplexplaneCunlessfistheidentityfunction.Inparticular,theinteriorofUfissimplyconnected.Thisfactenablesustoapplyvariousversionsoftheλ-lemmafortheholomorphicfamilyzf(z)/zcofinjectionsparametrizedovertheinteriorofUf.ThenecessaryorsufficientconditionsforUftocontain0or1asaninteriorpointarealsogiven.
简介:Letp(z)=beapolynomialdegreenandletThenaccord-ingtoBernstein’sinequality||p’||
简介:Everyoneknowstodayisthestartofthenewyear,butnoteveryoneknowstodayIsalsoZDay.ItsorganizerssaythatonZday,thelastshallbethefirst-andwhatbetterdateforsuchacelebrationthanthefirstdayoftheyear?Sincetodayalsomarksthe1484birthanniversaryoftheSwissReformationleaderUlrichZwingandthestartoftheMexicanZabatlsta
简介:Itiswellknownthateveryprimeidealminimaloveraz-idealisalsoaz-ideal.TheconverseisalsowellknowninC(X).ThuswheneverIisanidealinC(X),thenI~(1/2)isaz-idealifandonlyifIis,inwhichcaseI~(1/2)=I.Weshowthesamefactforz~o-idealsandthenitturnsoutthatthesumofaprimaryidealandaz-ideal(z~o-ideal)inC(X)whicharenotinachainisaprimez-ideal(z~o-ideal).Wealsoshowthateverydecomposablez-ideal(z~o-ideal)inC(X)istheintersectionofafinitenumberofprimez-ideals(z~o-ideal).Somecounter-examplesingeneralringsandsomecharacterizationsforthelargest(smallest)z-idealandz~o-idealcontainedin(containing)anidealaregiven.
简介:摘要“Z+Z”的智能化程度更高。可以制作数学动画,展示数学知识发生与发展的过程,并在运动变化中呈现数学之美,使学习成为趣味盎然的富有吸引力的活动。可以化静为动、化抽象为形象,弥补了传统教学方式在直观感、立体感和动态感等方面的不足,为教师化解教学难点、突破教学重点、提高课堂效率提供了一种现代化的教学手段。