从一个定理的实际应用谈数学实践

本应用零点证明了一张四腿等长的桌子一定以在连续光滑的地面上放平稳;该证明的过程告诉了我们如何把具体的实际问题数学模型化,从而用数学知识解决该问题;而且在此证明中也告诉了我们如何尽快地把桌子放平衡。     

实施创新教育的基本途径

创新是一个民族不断进步的灵魂，创新教育是世界各务教育改革和发展的共同趋势。本文运用“引导－－发现式”教学模式和教学方法进行教学，采用多种措施，发展学生的创造思维和创造个性，以培养具有创新能力的新型人才。     

开放教育学习支持服务系统建设探索

提高远程开放教育质量，学习支持服务是重要的因素。探讨人才培养模式改革试点中建立，完善，推进，支持，健全学习支持服务系统的若干问题，加强教学与助学的媒体建设，加快开放教育手段现代化进程，以进一步在理论与实践上加强对这一问题的研究。     

可持续消费及其核心理念

当今世界进入了一个高消费时代,面对高消费所带来的一系列消费伦理问题,人们开始倡导向新的消费模式———可持续消费模式转变。可持续消费的核心理念就是:绿色、适度、健康。同时,它还具有规范个人生活消费和反对个人生活消费中铺张浪费现象的作用。     

A model for making decisions about ethical dilemmas in student assessment

In this mixed-methods study we investigated the development of a generalized ethics decision-making model that can be applied in considering ethical dilemmas related to student assessment. For the study, we developed five scenarios that describe ethical dilemmas associated with student assessment. Survey participants (i.e., educators) completed an online survey to express their decision-making process when faced with ethical dilemmas relating to student assessment. Based on the literature and the educators’ written responses to the scenarios, elements to consider in an ethics decision-making model related to student assessment include the following: (1) the critical incident giving rise to the ethical dilemma; (2) identification of the conflict elements; (3) decisions about the ethicality of the elements; (4) justification of the decisions; (5) implications; and (6) alternative suggestions. This model offers guidance to educators in considering the dimensions of an ethical dilemma in assessment prior to making a decision.     

概率方法建模预测分数线

结合建模的步骤，运用回归分析、假设检验、正态分布等工具预测分数线。     

AGB星s-过程核合成模型

简介AGB星s-过程核合成模型在其发展过程中所经历的三个主要阶段。     

氢键对有机物性质和结构的影响

探讨了氢键的本质、种类及其对有机物结构和性质的影响。     

Inference Based on the Best-Fitting Model Can Contribute to the Replication Crisis: Assessing Model Selection Uncertainty Using a Bootstrap Approach

Inferences and conclusions drawn from model fitting analyses are commonly based on a single “best fitting” model. If model selection and inference are carried out using the same data model selection, uncertainty is ignored. We illustrate the Type I error inflation that can result from using the same data for model selection and inference, and we then propose a simple bootstrap-based approach to quantify model selection uncertainty in terms of model selection rates. A selection rate can be interpreted as an estimate of the replication probability of a fitted model. The benefits of bootstrapping model selection uncertainty are demonstrated in growth mixture analyses of data from the National Longitudinal Study of Youth, and a 2-group measurement invariance analysis of the Holzinger–Swineford data.     

当代西方国家德育模式与方法的人本化趋势

20世纪西方国家德育理论流派纷呈,德育模式和方法也丰富多彩。其中,人本主义德育理论对当代西方国家的德育理论、德育内容、德育方法等产生的影响尤为深刻。由于受人本主义德育理论的影响,当代西方国家的德育模式、德育方法呈现出明显的人本化趋势。