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101.
102.
In this paper, we show that proportions of observations that fall into a random region determined by a given Borel set and a central order statistic converge almost surely, provided that the corresponding population quantile is unique. We also describe three types of possible asymptotic behaviour of these proportions in the case of non-unique population quantile. As an application of our findings we establish limiting properties of numbers of ties with a central order statistics in a discrete sample. Our results are derived not only for independent and identically distributed observations but more generally for strictly stationary and ergodic sequences of random variables. 相似文献
103.
Chen Li 《统计学通讯:理论与方法》2017,46(2):874-891
This paper further studies monotone aging properties of the multivariate random lifetime. We revise the sufficient condition for the negative monotone aging property in terms of the multivariate usual stochastic order in Theorem 3.3 of Rezapour et al. (2013) and derive the condition sufficient to the multivariate monotone aging properties in terms of the upper orthant order. Also we study the upper orthant order of multivariate residual lifetimes and inactivity times from populations sharing a common Archimedean survival copula and Archimedean survival copula, respectively. Two simple applications in multivariate stress-strength and frailty models are presented as well. 相似文献
104.
In this paper, the two-parameter Pareto distribution is considered and the problem of prediction of order statistics from a future sample and that of its geometric mean are discussed. The Bayesian approach is applied to construct predictors based on observed k-record values for the cases when the future sample size is fixed and when it is random. Several Bayesian prediction intervals are derived. Finally, the results of a simulation study and a numerical example are presented for illustrating all the inferential procedures developed here. 相似文献
105.
In this article, based on generalized order statistics from a family of proportional hazard rate model, we use a statistical test to generate a class of preliminary test estimators and shrinkage preliminary test estimators for the proportionality parameter. These estimators are compared under Pitman measure of closeness (PMC) as well as MSE criteria. Although the PMC suffers from non transitivity, in the first class of estimators, it has the transitivity property and we obtain the Pitman-closest estimator. Analytical and graphical methods are used to show the range of parameter in which preliminary test and shrinkage preliminary test estimators perform better than their competitor estimators. Results reveal that when the prior information is not too far from its real value, the proposed estimators are superior based on both mentioned criteria. 相似文献
106.
Isabel Baño-Piñero María Emilia Martínez-Roche Manuel Canteras-Jordana César Carrillo-García Esteban Orenes-Piñero 《Women and birth : journal of the Australian College of Midwives》2018,31(4):e239-e244
Background
The rates of breastfeeding worldwide are slowly improving since 1996. Europe is still trailing behind the global breastfeeding incidence and prevalence rates. Thus, breastfeeding promotion, protection, prolongation and support have become an important challenge as breastfeeding sharply decreases in the first six months of life.Objectives
The aim of this project is to determine, assess and identify the real impact of breastfeeding support networks in Murcia (Spain).Methods
After searching unsuccessfully for a validated questionnaire, a specific one was developed and validated for measuring the impact of formal and informal support networks through five dimensions: satisfaction, consultation, experience, problems and support. The questionnaire was provided to 500 mothers with experience in breastfeeding, who brought their children to baby paediatricians between 2 June and 27 November 2014. Upon completion of the survey and fieldwork, a detailed statistical analysis was conducted.Results
The degree of satisfaction perceived by the users of the services of support breastfeeding networks is remarkable. In addition, mothers who clarified their doubts and discussed their problems with health professionals and/or breastfeeding support networks were more likely to breastfeed for a longer duration compared to those who did not (p = 0.005). Furthermore, mothers who sought support in breastfeeding are more likely to breastfeed for more than 6 months (p < 0.0005).Conclusion
Based on this information, we conclude that breastfeeding support networks have a positive influence in the duration of a women’s decision to breastfeed. 相似文献107.
汉语对立词词序不是任意安排的,对立词其构成分分线性排列规律和认知是与传统伦理、文化传统相一致的,即语言具有象似性。 相似文献
108.
研究了安全通信意义下,单向译码转发(decode-and-forward,DF)协作无线网络的中继选择问题。针对窃听者既能获得信源发出的信号,又能窃取中继节点转发数据的通信系统,提出了3种中继选择方案来对抗窃听者,增强系统物理层安全性。其中,方案一选择到窃听者信噪比(signal-to-noise ratio,SNR)最小的中继节点;方案二为最大最小(max-min)选择方案,即选择信源到中继节点和中继节点到信宿的较差信噪比中最大值所对应的中继节点;方案三根据窃听信道和主信道的瞬时信道状态信息(channel state information,CSI)选择使得窃听网络有最大保密容量的中继节点。在对各方案的性能分析过程中,得到了各中继选择方案拦截概率的闭式表示,进一步对拦截概率作渐近分析,获得了各中继选择方案的分集阶数。具体地,方案一的分集阶数为1,另外2个中继选择方案的分集阶数均为中继节点个数M。数值结果验证了理论分析得到的结论。 相似文献
109.
现代社会秩序的政治建构受制于民主和信任建设中的交织关系,体现为如何化解委托代理中的"逆向选择"和"道德风险"。这促使政治思想家们不断探索解决路径,形成了维持社会秩序的霍布斯模式、洛克—熊彼特模式、托克维尔—帕特南模式以及蒂利模式等。基于信任的民主不仅需要加强关于政府官员的能力和素质的制度化建设,还需要培育社会资本和加强公民共同体建设,更需要强化政府和民间互动的策略性和有效性,促发信赖确证、条件满足和风险化解,以维护社会秩序。 相似文献
110.
按照马克斯.韦伯对现代精神特质的概括,现代就是"理性祛除巫魅"。祛魅作为现代处置神性信仰与公共秩序二元化方略的准确反映,长期以来被人们解读为一种反对宗教介入公共生活的现代姿态。其实,这种偏狭的"现代"忽略了信仰对于人类生活的意义,并因此无法完整理解现代生活公私两个世界的互动关系。20世纪50年代开始至今,宗教的复兴运动促使人们在祛魅之外看到由复魅象征着的人类另一种生活模式。由此人们可以认识到宗教之于人心秩序、理性之于社会秩序的高度相关性。宗教的价值就此再获肯定。而掌握世俗权力的人们,也就不再具有以无神论的方式处置有神论问题的理由。 相似文献