A Closer Look at a Relatively Neglected Mean     

Avital Lann  Ruma Falk 《Teaching Statistics》2005,27(3):76-80

The self‐weighted mean (WS) – in which each value is weighted by itself – is presented in several contexts and illustrated. It is incorporated in a set of more familiar means. Intuitions concerning WS are explored.  相似文献   

对唐山师院体育系毕业生择业状况的调查     

汤跃 《唐山师范学院学报》2003,25(2):82-82,88

对近几年唐山师范学院体育系毕业生择业状况进行调查分析，以找出供需矛盾所在，并提出教育改革建议。  相似文献   

小学教学课堂对话的特点：对专家教师与非专家教师的比较   总被引：1，自引：0，他引：1  

李琼  倪玉菁 《课程.教材.教法》2007,(11)

采用课堂观察与录像法,比较分析了55节小学数学课中专家教师与非专家教师在课堂对话方式与内容方面的差异。结果表明,专家教师更倾向于运用分析性与比较性问题,能够探查与运用学生的数学想法,由师生学习的共同体来判断答案的合理性,其课堂对话方式表现为:学生陈述—师生质疑—学生解释;而非专家教师则提了更多简单回忆性与描述过程性问题,能够认可学生的想法但并没有将之纳入到教学中,教师成为答案合理性的决定者,其课堂对话方式典型地表现为:教师提问—学生回答—教师评价。  相似文献   

Fitting Unstructured Finite Mixture Models in Longitudinal Design: A Recommendation for Model Selection and Estimation of the Number of Classes     

Naoya Todo 《Structural equation modeling》2016,23(5):695-712

In longitudinal design, investigating interindividual differences of intraindividual changes enables researchers to better understand the potential variety of development and growth. Although latent growth curve mixture models have been widely used, unstructured finite mixture models (uFMMs) are also useful as a preliminary tool and are expected to be more robust in identifying classes under the influence of possible model misspecifications, which are very common in actual practice. In this study, large-scale simulations were performed in which various normal uFMMs and nonnormal uFMMs were fit to evaluate their utility and the performance of each model selection procedure for estimating the number of classes in longitudinal designs. Results show that normal uFMMs assuming invariance of variance–covariance structures among classes perform better on average. Among model selection procedures, the Calinski–Harabasz statistic, which has a nonparametric nature, performed better on average than information criteria, including the Bayesian information criterion.  相似文献   

Toy safety and selection     

Satomi Izumi Taylor  Vivian Gunn Morris  Cosby Steele Rogers 《Early Childhood Education Journal》1997,24(4):235-238

Toys can be used to promote children's cognitive, physical, motor, language, social, and emotional development. Safety and developmental appropriateness are of the utmost importance when selecting children's toys. Parents and teachers and other helping professionals need to teach children the safe use of toys to prevent toy-related accidents. Obtain additional information regarding toy safety by calling the U.S. Consumer Product Safety Commission at 1(800)638-CPSC.  相似文献   

探索计算机程序设计中的排序方法     

李云 《和田师范专科学校学报》2006,26(5):171-172

排序(sorting)是计算机程序设计中的一种重要操作,其方法也很多,有快速排序、冒泡法排序、选择法排序等,笔者将对这三种方法进行详细分析,以便大家能够更好领悟它。  相似文献   

证券组合投资的模糊规划方法     

黄君 《株洲师范高等专科学校学报》2004,9(2):45-47

基于证券投资预期收益和风险的不确定性,利用多样化选择约束抵减证券投资的非系统风险.以证券组合投资的收益率极大化和β值极小化为目标.建立一种模糊规划模型,指出模型的求解方法.  相似文献   

翻译中的适应与选择——兼谈复译现象     

郑周林 《绥化学院学报》2011,(6):141-143

在中国近现代翻译史上,复译是普遍存在的现象,并带动了几次高潮,值得对其产生机理进行研究。适应与选择论,作为一种运用综合法来阐释翻译生态环境的理论,强调翻译过程中译者对文本、文化、读者等因素的适应与选择。运用适应与选择的观点,结合简略的翻译史研究及个案分析,指出复译现象的存在是适应与选择的结果,并论述了复译的策略趋势。  相似文献   

Factors affecting authors' manuscript submission behaviour: A systematic review     

Xiaoting Xu  Juan Xie  Jianjun Sun  Ying Cheng 《Learned Publishing》2023,36(2):285-298

  相似文献   

“互联网+”时代下同行评议期刊精准寻找审稿专家的途径与实践     

黄伟  孙伟  蒋霞 《编辑学报》2023,(1):60-65

期刊和文章数量的增长使得寻找合适的审稿专家成为一项具有挑战性的任务,而期刊编辑需要审稿专家的协助才能保障文章的学术质量和期刊的声誉。本文首先比较分析了传统方法寻找审稿专家途径的优点、不足和维护措施。然后,介绍了在“互联网+”时代下如何依靠学术搜索系统、文献数据库、科研人员画像平台、人工智能技术,使寻找审稿专家的途径更加广泛和有效。最后以《上海交通大学学报》(英文版)的外审工作实践为例,通过对专家特征的识别,合理配置不同特征的专家,把控审稿时间点和分析审稿行为,提升了期刊的外审效率。  相似文献