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本文讨论了一种非平稳的带后效的呼唤流。它在确定的时间区间内有确定的呼唤总数,且在其中某段时间内出现的呼唤数会影响到下一段时间的流强度,证明了在适当的假定下这种流呈二项分布。本文还讨论了这种流的排队问题,引进状态矩阵G,给出了求解方法,同时讨论了等待时间的分布律。 相似文献
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设{Xi}i.i.d.为寿命随机变量叙列,分布函数为F(x);{Yi}i.i.d.为相应的与之独立的截断随机变量叙列,其分布函数为G(y).当τp=sup{ι:F(ι)<1}<τG=sup{ι:G(ι)<1}时,Kaplan-Meier估计的强一致性为F?ldes与Rejeto于1981年证明.本文则研究了较为复杂的τF≥τG情况,证明了在某些条件之下,Kaplan—Meier估计仍具有强一致性. 相似文献
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ESTIMATION OF THE MEAN LIFETIME IN NON-PARAMETRIC MODEL UNDER MODIFIED TYPE Ⅰ CENSORING 总被引:1,自引:0,他引:1
The methods to estimate the mean,s of the lifetimes under modified Type I Censoring arediscussed, in which case the distribution function of the lifetimes is unknown and the informationabout the individuals is cut by the fixed time C. As a slight modincation, we suggest observingsmall percentage of the lifetimes to construct the estimations. These estimations are unbiasedand consistent. 相似文献
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本文讨论区间数据情况下, 指数分布参数的估计\bd 引入了两种叠代方法, 证明了在一定的条件下, 叠代过程的收敛性. 相似文献
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郑祖康 《应用数学学报(英文版)》1987,(3)
This paper proposes a new class of estimators of parameters in linear regression model withcensored data.It also contains sufficient conditions under which these estimators are stronglyconsistent and asymptotically normal. 相似文献
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郑祖康 《应用数学学报(英文版)》1998,14(3):245-251
1.IntroductionLetXI,X2,',X.beasequenceofnonnegativeindependentrandomvariableswithcommoncontinuousdistributionfunctionF.LetYI,Y2,',YebeanothersequenceofnonnegativeindependentrandomvariableswithcommoncontinuousdistributionfunctionG,alsoindependentof{Xi}.WecanonlyobserveZi=min(Xi,K),6i~I(x.SYi).OnewaytoestimatethedistributionfunctionForthesurvivalfunctionS~1--Ffromthesample(Zi,st)(i=l,2,')n)isthroughtheproductlimitestimatordueto[1].ItisdefinedbywhereZ(i)aretheorderstatisticsofZian… 相似文献
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In this paper, we discuss the case that{Yi} are censored by {ti}, where{ti} are i.i.d. random variables and also independent of {Yi}. Under certain conditions we still obtain the strong consistency of mn(x). 相似文献