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11.
《Journal of Statistical Computation and Simulation》2012,82(11):863-879
The finite sample performance of a number of tests for symmetry of the distribution of the errors of a linear model is considered. The first family of tests is based on the discrepancy between two regression fits. The first fit is appropriate under symmetric errors while the second is appropriate for skewed as well as symmetric error distributions. The second family of procedures consists of tests for the univariate symmetry problem. Thus, in the linear model setting these tests are based on residuals. An extensive empirical study of the finite sample, null behavior of the tests is presented. The results of a power comparison among the tests is also discussed. 相似文献
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甘露 《广西师范学院学报(哲学社会科学版)》2014,(5):10-12
陈佥文先生长期致力于民间传说研究,其新著《壮族风物传说的文化研究》以文化学为理论视角,系统、深入地研究壮族风物传说,开创了民间风物传说研究的新格局。 相似文献
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《Women and birth : journal of the Australian College of Midwives》2020,33(3):294-299
BackgroundThe prevalence of high body mass index is increasing amongst women of child bearing age. High maternal body mass index has ramifications for both mother and baby including increased health risks from gestational diabetes mellitus, caesarean section and stillbirth. Despite the increasing prevalence of high maternal body mass index little is known of the experiences of these women regarding nutrition information access and use during the antenatal period.MethodsA qualitative study using individual interviews was undertaken at a tertiary hospital in south-eastern Australia. Twenty-Eight women with a body mass index ≥30 kg/m2 participated. Interviews were audio recorded, transcribed, cross-checked for consistency and entered into a word processing document for further scrutiny. Data was analysed using interpretative phenomenological analysis (IPA). In any phenomenological study the researcher’s objective is to elicit the participant’s views on their lived experiences.FindingsThree major themes emerged: (1) Nutrition-related information attainment; (2) Nutrition-related information management; (3) Nutrition-related information needs and wants.ConclusionThe findings from this study may assist the future development and dissemination of nutrition-related information for pregnant women with a high body mass index. Women want more individualised support regarding nutritional requirements during pregnancy. 相似文献
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Researchers have documented the consequences of relationship instability for parenting stress but have given little attention to within‐partner relationship instability. In this study, the authors used data from the Fragile Families and Child Wellbeing Study (N = 3,544) to estimate the association between within‐partner relationship instability (known as churning or on‐again/off‐again relationships) and parenting stress. First, they found that by the focal child's 5th birthday about 16% of biological parents experience churning. Second, compared to being stably together with or stably separated from the child's other parent, churning is associated with greater parenting stress for both mothers and fathers. Because parenting stress is the same or higher among churners compared to their counterparts who stably separate, this suggests that, more than a change in partner, relationship instability—whether within or across relationships—is tied to parenting stress. 相似文献
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M. B. M. B. K. Gawarammana 《统计学通讯:模拟与计算》2017,46(3):2103-2120
In this study, some methods suggested for binary repeated measures, namely, Weighted Least Squares (WLS), Generalized Estimating Equations (GEE), and Generalized Linear Mixed Models (GLMM) are compared with respect to power, type 1 error, and properties of estimates. The results indicate that with adequate sample size, no missing data, the only covariate being time effect, and a relatively limited number of time points, the WLS method performs well. The GEE approach performs well only for large sample sizes. The GLMM method is satisfactory with respect to type I error, but its estimates have poorer properties than the other methods. 相似文献
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徐德莉 《中南大学学报(社会科学版)》2013,(1)
延安学习运动建立了一套较为完整的学习内容体系,创建了行之有效的学习方法,建构了科学有效的学习机制,不仅提高了延安时期的革命干部之学习水平与能力,并为革命与战争取得胜利提供重要的智力支持,而且为今天的学习型政党建设创建可行的有益模式,因此,延安学习运动是中国共产党不断开展自身建设的重要拐点,具有重要的开拓与启迪之功效. 相似文献
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白寿彝先生的治学与他的中国通史编纂 总被引:1,自引:0,他引:1
白寿彝先生在历史学的许多领域都取得了卓越的成就,晚年主要集中在回族史、中国史学史、中国通史等方面,并表现出总结性、成熟性和继续创新性三个特点。其中中国通史在他的学术规模中居于核心的地位,是他一生研究历史学的最高追求。他带领国内史学家,历20个春秋,终于完成体裁新颖的多卷本中国通史,实现了一个世纪中国史家的愿望,把自己的学术事业推向了辉煌的最高点。 相似文献
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所谓伊斯兰文化的研究方法,是指正确地进行伊斯兰文化研究所应遵循的一套原则、手段、程序和技巧。研究方法在伊斯兰文化的发展过程中承担着特别重要的职能,它在一定程度上制约、规范着伊斯兰文化发展的水平和风格。没有成熟、科学的研究方法,就不会产生成熟、发达的伊斯兰文化。就伊斯兰文化的研究方法,我们有两点拙见,把它说出来,以求教学人。 首先,摆正伊斯兰与伊斯兰文化的关系。伊斯兰文化作为一种宗教文化实体,与伊斯兰密不可分,互为依托。按照伊斯兰的基本教义,伊斯兰是安拉的意志,通过《古兰经》和圣训得以具体体现。两者是伊斯兰教的基础和最基本的经典,是伊斯兰国家信仰原则、哲学思想、政治经济、法律创制和司法实践的权威准则和第一源泉。而伊斯兰文化是由阿拉伯民族和穆斯林各民族在社会历史实践中共同参与创造 相似文献
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