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231.
Ying-Ying Zhang Ze-Yu Wang Zheng-Min Duan Wen Mi 《Journal of Statistical Computation and Simulation》2019,89(16):3061-3074
For the hierarchical Poisson and gamma model, we calculate the Bayes posterior estimator of the parameter of the Poisson distribution under Stein's loss function which penalizes gross overestimation and gross underestimation equally and the corresponding Posterior Expected Stein's Loss (PESL). We also obtain the Bayes posterior estimator of the parameter under the squared error loss and the corresponding PESL. Moreover, we obtain the empirical Bayes estimators of the parameter of the Poisson distribution with a conjugate gamma prior by two methods. In numerical simulations, we have illustrated: The two inequalities of the Bayes posterior estimators and the PESLs; the moment estimators and the Maximum Likelihood Estimators (MLEs) are consistent estimators of the hyperparameters; the goodness-of-fit of the model to the simulated data. The numerical results indicate that the MLEs are better than the moment estimators when estimating the hyperparameters. Finally, we exploit the attendance data on 314 high school juniors from two urban high schools to illustrate our theoretical studies. 相似文献
232.
An extended single‐index model is considered when responses are missing at random. A three‐step estimation procedure is developed to define an estimator for the single‐index parameter vector by a joint estimating equation. The proposed estimator is shown to be asymptotically normal. An algorithm for computing this estimator is proposed. This algorithm only involves one‐dimensional nonparametric smoothers, thereby avoiding the data sparsity problem caused by high model dimensionality. Some simulation studies are conducted to investigate the finite sample performances of the proposed estimators. 相似文献
233.
234.
In this paper, we compare the hazard rate functions of the second-order statistics arising from two sets of independent multiple-outlier proportional hazard rates (PHR) samples. It is proved that the submajorization order between the sample size vectors together with the supermajorization order between the hazard rate vectors imply the hazard rate ordering between the corresponding second-order statistics from multiple-outlier PHR random variables. The results established here provide theoretical guidance both for the winner's price for the bid in the second-price reverse auction in auction theory and fail-safe system design in reliability. Some numerical examples are also provided for illustration. 相似文献
235.
张海燕 《山西高等学校社会科学学报》2014,(10):77-79
随着高校就业工作信息化建设的推进,微信平台成为开展就业服务指导工作的新阵地。利用微信平台开展就业服务指导工作形式新颖、便捷且吻合“90后”大学生的特点。但目前就业指导服务微信平台的全程性存在质疑、有效性存在障碍等问题,影响了它的实际效用。应当首先对微信平台的优势进行准确定位,其次要不断拓展高校就业服务指导微信平台用户数量的广度和深度,再次要提供更优质的个性化服务,以期促进高校就业服务指导微信平台有效、优质的运营。 相似文献
236.
Xiang Zhang 《Journal of nonparametric statistics》2014,26(2):321-340
Multivariate density estimation plays an important role in investigating the mechanism of high-dimensional data. This article describes a nonparametric Bayesian approach to the estimation of multivariate densities. A general procedure is proposed for constructing Feller priors for multivariate densities and their theoretical properties as nonparametric priors are established. A blocked Gibbs sampling algorithm is devised to sample from the posterior of the multivariate density. A simulation study is conducted to evaluate the performance of the procedure. 相似文献
237.
Jundong Hou Chi Zhang Robert Allen King 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2017,28(2):648-671
Although trust is long known to be critical to predict behaviors in a charitable context, little research has examined trust damage and its effects on giving behavior. Trust damage is an intermediate state between trust and distrust, rather than a simple reversal or extension, and can change over time. Our research explores individual donor’s trust damage through a dynamic evolution. Across the longitudinal survey, we conclude that the trust damage of pre-giving, giving, and post-giving stage plays different roles in the decision-making process. Trust damage does not play a direct role in the giving intention, but it can indirectly affect giving intention through its impact on perceived benefit and perceived risk. Individual donor’s satisfaction has a strong effect on post-giving trust or continual trust damage, which in turn positively affects future giving intention and behavior. Several important insights for practitioners in the nonprofit sector are also discussed. 相似文献
238.
Zhang Zaibo 《当代中国人口》2014,(3)
正Looking at the paintings of Ren Changjiu painted during his one-year research and study at Beijing Fine Art Academy,we cannot help applauding for the progress and accomplishments he has made on the road of oil paintings exploration in such a short period of time.From his paintings,we can clearly find that the objects have gradually become blurred and fuzzy comparing to his early works 相似文献
239.
240.
建筑遗产的活化利用是城市历史街区更新的重要手段,而旅游利用则是建筑遗产活化利用的关键支持。本文在综述建筑遗产利用相关文献的基础上,总结了建筑遗产保护的思潮演变,并分析了旅游在其中的角色与功能。结论认为,建筑遗产保护正逐渐从单一的"原状保护"向多元化的"活化利用"转变。在这种活化利用中,旅游起着重要作用,它承担着建筑遗产空间关联、业态支撑的角色,而这种以旅游为目的的活化利用也提升了游客体验,增加了建筑遗产的吸引力,活化了城市空间结构,增加了城市竞争力。 相似文献