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排序方式: 共有283条查询结果,搜索用时 15 毫秒
1.
This study treats an asymptotic distribution for measures of predictive power for generalized linear models (GLMs). We focus on the regression correlation coefficient (RCC) that is one of the measures of predictive power. The RCC, proposed by Zheng and Agresti is a population value and a generalization of the population value for the coefficient of determination. Therefore, the RCC is easy to interpret and familiar. Recently, Takahashi and Kurosawa provided an explicit form of the RCC and proposed a new RCC estimator for a Poisson regression model. They also showed the validity of the new estimator compared with other estimators. This study discusses the new statistical properties of the RCC for the Poisson regression model. Furthermore, we show an asymptotic normality of the RCC estimator.  相似文献   
2.
Let X1, …, Xn be i.i.d. from a discrete probability mass function (pmf) p. In Balabdaoui et al. [(2013), ‘Asymptotic Distribution of the Discrete Log-Concave mle and Some Applications’, JRSS-B, in press], the pointwise limit distribution of the log-concave maximum-likelihood estimator (MLE) was derived in both the well- and misspecified settings. In the well-specified setting, the geometric distribution was excluded, classified as being degenerate. In this article, we establish the global asymptotic theory of the log-concave MLE of a geometric pmf in all ?q distances for q∈{1, 2, …}∪{∞}. We also show how these asymptotic results could be used in testing whether a pmf is geometric.  相似文献   
3.
刘姥姥和桑丘是来自两个不同地域的人物,但是他们的行为方式和思想意识又有着许多的相似点,他们身上都体现出了农民的自私狭隘,同时也表现出了农民所固有的善良品性。透过他们,可以看到那个时代的黑暗面,看到不同阶层的生活状态和贫富差距,看到底层人民的悲惨命运和上层贵族的穷奢极欲。  相似文献   
4.
We propose here a general statistic for the goodness of fit test of statistical distributions. The proposed statistic is constructed based on an estimate of Kullback–Leibler information. The proposed test is consistent and the limiting distribution of the test statistic is derived. Then, the established results are used to introduce goodness of fit tests for the normal, exponential, Laplace and Weibull distributions. A simulation study is carried out for examining the power of the proposed test and to compare it with those of some existing procedures. Finally, some illustrative examples are presented and analysed, and concluding comments are made.  相似文献   
5.
秩序社会强调的只是社会运行所具有的稳定、有条理的外在特征,它并不内在蕴含伦理的规范性要求。良好秩序社会则在强调有秩序的同时,也重视在社会生活中对个体发展所必须具备的"基本的善"的提供。良好秩序的选择不仅对于个体生存和发展具有保护性和发展性的双重伦理价值,而且它也是社会整体进步的基本条件和重要保证。  相似文献   
6.
In chemical and microbial risk assessments, risk assessors fit dose‐response models to high‐dose data and extrapolate downward to risk levels in the range of 1–10%. Although multiple dose‐response models may be able to fit the data adequately in the experimental range, the estimated effective dose (ED) corresponding to an extremely small risk can be substantially different from model to model. In this respect, model averaging (MA) provides more robustness than a single dose‐response model in the point and interval estimation of an ED. In MA, accounting for both data uncertainty and model uncertainty is crucial, but addressing model uncertainty is not achieved simply by increasing the number of models in a model space. A plausible set of models for MA can be characterized by goodness of fit and diversity surrounding the truth. We propose a diversity index (DI) to balance between these two characteristics in model space selection. It addresses a collective property of a model space rather than individual performance of each model. Tuning parameters in the DI control the size of the model space for MA.  相似文献   
7.
Abstract. In this paper, we provide a definition of pattern of outliers in contingency tables within a model‐based framework. In particular, we make use of log‐linear models and exact goodness‐of‐fit tests to specify the notions of outlier and pattern of outliers. The language and some techniques from Algebraic Statistics are essential tools to make the definition clear and easily applicable. We also analyse several numerical examples to show how to use our definitions.  相似文献   
8.
曲彬 《理论界》2013,(12):159-161
美国作家埃德加·艾伦·坡的短篇小说以其独特的恐怖色彩闻名于世,他的《厄舍屋的倒塌》更是成为倍受读者青睐的经典。对这个故事进行细致的文本分析就可以发现,故事中不但有天才的恐怖氛围的营造,还潜藏着人物对生命的渴望和对善与美的追求。正是这种崇高的道德诉求,使得作品拥有了持久的生命力,令读者百看不厌。品味作品中娴熟的艺术技巧和温暖的人性味道,我们将还原经典更全面的价值。  相似文献   
9.
当下的中国处于一个价值多元的时代,以往的建立于进化论、阶级论和启蒙主义 的文学史观也是颇有价值的;但是,进入21世纪,由于“以人为本”与“和谐社会” 目标的提出,也由于社会时空、文学功能和美学趣味的巨大变化,教材型的中国现代 文学史已远不能适应时代、社会和文学的发展需要,因此亟待重建和确立一个更为公 正、平等与合理的价值评估体系。这个评估体系是以人道主义为最高原则,以真、 善、美为三个闪光点,其最大优势是具有普适性、超越性、公正性和人本性的功能特 点。

关键词: 现代中国文学史?评估体系?价值重建?人道主义?真善美和谐统一

China is now in an era of multiple values. While there is some virtue in previous theories on the history of literature based on the theory of evolution, class struggle and the enlightenment, when it comes to the twenty‐first century, the histories of modern Chinese literature used in teaching are far from adequate for meeting the developmental needs of the times, society and literature. This is especially so in view of the putting forward of the goals of “putting people first” and “the harmonious society,” and the great changes taking place in time and space, the function of literature and aesthetic taste. Hence there is an urgent need to restructure this history and establish a more fair, equal and reasonable system of evaluation. Such a system would have humanism as its highest principle, and truth, goodness and beauty as its three virtues. Its great superiority would be its functional characteristics of universality, transcendence, fairness, and human‐centeredness.  相似文献   
10.
In this paper, we introduce the p-generalized polar methods for the simulation of the p-generalized Gaussian distribution. On the basis of geometric measure representations, the well-known Box–Muller method and the Marsaglia–Bray rejecting polar method for the simulation of the Gaussian distribution are generalized to simulate the p-generalized Gaussian distribution, which fits much more flexibly to data than the Gaussian distribution and has already been applied in various fields of modern sciences. To prove the correctness of the p-generalized polar methods, we give stochastic representations, and to demonstrate their adequacy, we perform a comparison of six simulation techniques w.r.t. the goodness of fit and the complexity. The competing methods include adapted general methods and another special method. Furthermore, we prove stochastic representations for all the adapted methods.  相似文献   
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