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141.
七体自枚乘《七发》首创之后,作者继踵。建安七体文皆是虚构一主一客问答的招隐型作品,但它们并不是简单的模拟之作,在思想倾向上,虽是以儒家思想为主,却也体现出当时对刑名之学的重视;在情感倾向上,作者的情感已由讽谏转向颂美,名为招隐,实为自招,并成为激励士人的劝仕之作;在艺术技巧上,注重语句的对仗工整,讲究音律的和谐,用典成分增多,体现出较强的骈化趋势。总之,建安七体文无论从内容还是形式,都受到了那个时代社会风气和政治背景的影响。 相似文献
142.
143.
《Journal of Statistical Computation and Simulation》2012,82(2):273-289
The weighted kappa coefficient of a binary diagnostic test is a measure of the beyond-chance agreement between the diagnostic test and the gold standard, and is a measure that allows us to assess and compare the performance of binary diagnostic tests. In the presence of partial disease verification, the comparison of the weighted kappa coefficients of two or more binary diagnostic tests cannot be carried out ignoring the individuals with an unknown disease status, since the estimators obtained would be affected by verification bias. In this article, we propose a global hypothesis test based on the chi-square distribution to simultaneously compare the weighted kappa coefficients when in the presence of partial disease verification the missing data mechanism is ignorable. Simulation experiments have been carried out to study the type I error and the power of the global hypothesis test. The results have been applied to the diagnosis of coronary disease. 相似文献
144.
李鹏举 《陕西学前师范学院学报》2018,34(1):74-77
幼儿园游戏与教学在学前教育研究中一直隶属于两个领域,尽管有学者提出了一些融合设想,但仍难脱二元论范畴。本研究立足于幼儿游戏本质追寻,并把游戏本质作为幼儿园教学的基本内核,游戏内部的自我控制感和教学外部目的性的平衡与结合,正是幼儿园教学的核心特质。这种思路既理清了幼儿园教学特殊性,又有利于打破目前学界对于二者关系的形形色色的二元论认识,有利于促进二者从对立走向统一。 相似文献
145.
《Scandinavian Journal of Statistics》2018,45(3):444-464
We propose a semiparametric estimator for single‐index models with censored responses due to detection limits. In the presence of left censoring, the mean function cannot be identified without any parametric distributional assumptions, but the quantile function is still identifiable at upper quantile levels. To avoid parametric distributional assumption, we propose to fit censored quantile regression and combine information across quantile levels to estimate the unknown smooth link function and the index parameter. Under some regularity conditions, we show that the estimated link function achieves the non‐parametric optimal convergence rate, and the estimated index parameter is asymptotically normal. The simulation study shows that the proposed estimator is competitive with the omniscient least squares estimator based on the latent uncensored responses for data with normal errors but much more efficient for heavy‐tailed data under light and moderate censoring. The practical value of the proposed method is demonstrated through the analysis of a human immunodeficiency virus antibody data set. 相似文献
146.
147.
《Journal of Statistical Computation and Simulation》2012,82(11):1607-1620
This article presents the statistical inferences on Weibull parameters with the data that are progressively type II censored. The maximum likelihood estimators are derived. For incorporation of previous information with current data, the Bayesian approach is considered. We obtain the Bayes estimators under squared error loss with a bivariate prior distribution, and derive the credible intervals for the parameters of Weibull distribution. Also, the Bayes prediction intervals for future observations are obtained in the one- and two-sample cases. The method is shown to be practical, although a computer program is required for its implementation. A numerical example is presented for illustration and some simulation study are performed. 相似文献
148.
This article discusses how analyst's or expert's beliefs on the credibility and quality of models can be assessed and incorporated into the uncertainty assessment of an unknown of interest. The proposed methodology is a specialization of the Bayesian framework for the assessment of model uncertainty presented in an earlier paper. This formalism treats models as sources of information in assessing the uncertainty of an unknown, and it allows the use of predictions from multiple models as well as experimental validation data about the models’ performances. In this article, the methodology is extended to incorporate additional types of information about the model, namely, subjective information in terms of credibility of the model and its applicability when it is used outside its intended domain of application. An example in the context of fire risk modeling is also provided. 相似文献
149.
人的思想道德是人口素质的重要内容,人的思想道德在经济增长和经济发展中具有重要作用。但目前学术界还缺乏对人的思想道德素质与经济增长、经济发展和脱贫致富相关性的理论分析与实证检验。新时期反贫困实践应重视思想反贫困和思想扶贫。 相似文献
150.
Antonello D'Ambra 《统计学通讯:理论与方法》2017,46(6):2942-2954
Taguchi's statistic has long been known to be a more appropriate measure of association of the dependence for ordinal variables compared to the Pearson chi-squared statistic. Therefore, there is some advantage in using Taguchi's statistic in the correspondence analysis context when a two-way contingency table consists at least of an ordinal categorical variable. The aim of this paper, considering the contingency table with two ordinal categorical variables, is to show a decomposition of Taguchi's index into linear, quadratic and higher-order components. This decomposition has been developed using Emerson's orthogonal polynomials. Moreover, two case studies to explain the methodology have been analyzed. 相似文献