排序方式: 共有49条查询结果,搜索用时 93 毫秒
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直接利用期望定义来求离散型随机变量的数学期望,有时计算比较困难.利用条件数学期望、随机变量的和式分解、对称性,分别给出了一个离散型随机变量数学期望的几种求法. 相似文献
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引进了B值随机变量及可测集г的双条件期望的概念,研究了双条件期望的主要性质,得到了双条件期望下的几个重要不等式,进而证明了双条件期望的有关收敛定理. 相似文献
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广义复合Poisson风险模型下的生存概率 总被引:6,自引:0,他引:6
In this paper we generalize the aggregated premium income process from a constant rate process to a poisson process for the classical compound Poinsson risk model, then for the generalized model and the classical compound poisson risk model, we respectively get its survival probability in finite time period in case of exponential claim amounts. 相似文献
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Li-xingZhu Heng-jianCui K.W.Ng 《应用数学学报(英文版)》2004,20(4):533-540
The relationship between the linear errors-in-variables model and the corresponding ordinary linear model in statistical inference is studied. It is shown that normality of the distribution of covariate is a necessary and sufficient condition for the equivalence. Therefore, testing for lack-of-fit in linear errors-in-variables model can be converted into testing for it in the corresponding ordinary linear model under normality assumption. A test of score type is constructed and the limiting chi-squared distribution is derived under the null hypothesis.Furthermore, we discuss the power of the test and the choice of the weight function involved in the test statistic. 相似文献
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G-旋模型场代数中的对偶定理 总被引:2,自引:0,他引:2
设G是有限群, H是G的子群,D(G)为G的Double代数, F是 G-旋模型所对应的场代数. 本文考虑D(G)的Hopf子代数D(H),证明了F的D(H)不变子空间AH是C*-代数.D(H)存在C*-表示,使得D(H)和AH互为换位子. 相似文献
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本文建立了更广泛的各种集值(上下)鞅的停时定理;推广并改进了N.S.Papageoriou[10]和张,汪,高[13]中的结果。 相似文献
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讨论了集值工存在弱Radon-Nikodym导数的充要条件,对弱紧凸集值随机变量给出了其条件期望存在时的一个特征。 相似文献