数学化对学生学习数学概念的影响——以“小数”概念学习为例     

郭立军  刘凤伟 《课程.教材.教法》2018,(1):91-96

"数学化"这一概念最初是由荷兰数学家和数学教育家弗赖登塔尔(H.Freudenthal,1905—1990)提出的。"数学化"既是数学教学的过程,也是数学教学的结果。以"小数"概念学习为例,将数学化的过程呈现在数学概念的教学中,第一次学习是水平数学化,即由现实问题到数学问题的学习;第二次学习是垂直数学化,即由具体问题到抽象概念的学习。在这两次教学实践过程中,生活经验、模型支撑、多种表征都对学生"小数"概念数学化有一定的帮助。  相似文献   

网络舆情场中信息受众观点测度的机理及路径分析     

宋先智  黄微  高俊峰 《图书情报工作》2018,62(2):100-107

[目的/意义]整合定性与定量的舆情研究视角,统一多模态研究对象,实现网络舆情信息受众的观点测度,可修复网络舆情分析与治理的理论与实践裂痕。[方法/过程]通过引入网络舆情场的概念,对网络舆情信息受众、受众观点测度的内涵进行诠释,就网络舆情场与信息受众观点测度的逻辑关系加以辩证讨论。[结果/结论]提出网络舆情场内舆情受众观点测度机理和具体测度路径,为后续网络舆情场中的网络舆情信息分析、多维度信息受众观点测度,受众认知规律发现,网络舆情监督和管控限制等层面的研究做相应铺垫。  相似文献   

我国“教练员-运动员关系”理论研究：历程回溯与体系构建     

解欣 《南京体育学院学报(社会科学版)》2016,(2):117-122

“教练员-运动员关系”研究是我国学术界日益关注的新领域，随着研究的日渐深入，它在竞技体育人际关系范畴中的核心地位也颇受学界所公认。在西方理论方法的指引下我国“教练员-运动员关系”理论研究虽取得了较快的进步，但仍存在理论深入研究不足、概念模糊、本质内涵及边界特点不清晰、研究方法单一等问题。由此，本文以我国“教练员-运动员关系”理论研究的历程回溯为基础，从本土社会情景角度出发对“教练员-运动员关系”理论概念、边界特点等要素进行重新界定，进而对我国“教练员-运动员关系”理论研究体系进行初步构建，旨为引导我国“教练员-运动员关系”理论研究朝着正确的方向快速前行。  相似文献   

外来术语的引进与学术本土化——以softpower的汉语翻译之争为例     

古俊伟 《太原大学学报》2011,12(3):64-68

外来术语的引进不仅仅是一个简单的翻译问题。softpower这一术语进入中国之后被翻译为“软实力”、“软权力”和“软力量”，甚至引起了学者间的持久争论。从术语学的角度看，对softpower的翻译违反了术语的单义性和单名性原则，没有充分考虑来源语中该术语的概念体系和目标语中该术语的概念体系，以及这两个概念体系之间的对应。从翻译学的角度看，解构主义给翻译的异化原则提供了理论支持，使译者对来源语术语的忠诚度减弱，自我创作成分增加。从意识形态的视角看，学术本土化为通过术语翻译的方式进行所谓的创新提供了道义支持。  相似文献   

Validity and Reliability of Three Self-Report Instruments for Assessing Attainment of Physical Activity Guidelines in University Students     

Joseph J. Murphy  Marie H. Murphy  Ciaran MacDonncha  Niamh Murphy  Alan M. Nevill  Catherine B. Woods 《Measurement in physical education and exercise science》2017,21(3):134-141

The purpose of this study was to compare the validity and reliability of three short physical activity self-report instruments to determine their potential for use with university student populations. The participants (N = 155; 44.5% male; 22.9 ± 5.13 years) wore an accelerometer for 9 consecutive days and completed a single-item measure, the a brief two item measure and the International Physical Activity Questionnaire—Short Form questionnaires on day 1 and 9. Correlations between self-reported and accelerometer derived moderate-to-vigorous physical activity levels were moderate for the International Physical Activity Questionnaire—Short Form, while poor for the single-item measure and the a brief two item measure. The agreement level was high with the International Physical Activity Questionnaire—Short Form (77.4%) and moderate for both the single-item measure (45.2 %) and a brief two item measure (44.5 %). The intraclass correlations between the two administrations were moderate to strong across all measures (0.52–0.70) in 133 participants. The International Physical Activity Questionnaire—Short Form is the most suitable of these three self-report instruments for use with this population due to higher correlations and levels of agreement with accelerometry.  相似文献   

Sport-specific factors predicting player retention in junior cricket     

Scott Talpey  Tom Croucher  Ahmed Bani Mustafa 《European Journal of Sport Science》2017,17(3):264-270

Understanding factors that motivate young athletes to continue participation in sport can help key stakeholders cultivate an environment that fosters long-term participation. This investigation sought to determine the performance and participation factors that influenced continued participation in junior cricket. Administration-level data were collected each annual season across a seven-year period by a community-level junior cricket association in Australia and analysed to identify the performance and participation-based predictors of player retention. All players were males aged <16 years. Players were categorised according to whether they remained in (or departed from) the association at the end of each playing season. A multivariate logistic regression model with a stepwise variable selection was employed to identify significant independent predictors of player retention. The number of innings batted and overs bowled were significant participation-related contributors to junior cricket player retention. Performance factors such as the number of wickets taken and the number of runs scored also significantly influenced player retention. Finally, team age group, the number of previous seasons played and age were also significant factors in player retention. This demonstrates that sufficient opportunity for children to participate in the game and expression of skills competence are key factors for retention in cricket.  相似文献   

自由视角下的“马拉松热”     

刘转青  练碧贞 《北京体育大学学报》2017,40(8):34-39

摘要：通过文献资料法将自由界定为“个人意志之理性独立与行动之不受限定”。运用观察法和访谈法对马拉松运动中的选手现状进行了详细描述，从中归结出马拉松运动所蕴含的自由因素，即选手个人的意志自由、参赛权利的自由、跑步方式的自由和平时练习的自由。在此基础上，从自由对于人的重要性、我国人们生活中自由的缺失以及马拉松运动中自由所发挥的作用三方面阐释了马拉松火爆的深层原因。提出马拉松火爆的真正原因是由于它使选手的主体性得以回归，为参与者提供了实现自我价值的良好平台，有效地满足了人们对于自由的渴望与追求。期冀马拉松运动的后续发展能够一如既往地坚守它所秉持的理念和价值主张，不因过度商业化的侵袭而异化；同时也期冀能够藉此为日常生活中其他公共活动的开展提供启示。  相似文献   

大众认知与运动休闲产业发展研究     

李〓梅 《广州体育学院学报》2017,37(3):62-64

运动休闲产业在中国是一个新兴产业,然而由于它具有健康性、时尚性和前瞻性的特点,近年来其发展显示出破竹之势,引来经济学人的普遍关注.然而作为一个综合性很强的新兴产业,其产业结构的构建和成熟发展许多诸多条件,而大众对产业的认知是诸多条件中最基础、最重要的一个.运动休闲相关业界人士必须积极宣传、教育社会各阶层正确认识运动休闲,使社会时尚、生活方式都融入运动休闲的理念,从而使运动休闲产业真正健康、可持续地发展.  相似文献   

高等体育教育供给侧结构性改革的发展理念与策略研究     

叶欣  陈绍军 《武汉体育学院学报》2017,51(7):85-89

围绕为什么进行高等体育教育供给侧结构性改革，契合"适应和引领新常态发展的重大创新，适应我国新常态发展的必然要求"这一理论问题，从供给侧结构性改革的导向、目标和内容等方面就如何实施高等体育教育的供给侧结构性改革提出发展理念，继而在教育活动主体结构、教育场域结构和教育创新层次结构等方面对高等体育教育的结构性改革进行策略研究，以期有效改善存在于我国高等体育教育中的结构性问题。  相似文献   

Precision measurement of the Newtonian gravitational constant     

Chao Xue  Jian-Ping Liu  Qing Li  Jun-Fei Wu  Shan-Qing Yang  Qi Liu  Cheng-Gang Shao  Liang-Cheng Tu  Zhong-Kun Hu  Jun Luo 《国家科学评论(英文版)》2020,7(12):1803

The Newtonian gravitational constant G, which is one of the most important fundamental physical constants in nature, plays a significant role in the fields of theoretical physics, geophysics, astrophysics and astronomy. Although G was the first physical constant to be introduced in the history of science, it is considered to be one of the most difficult to measure accurately so far. Over the past two decades, eleven precision measurements of the gravitational constant have been performed, and the latest recommended value for G published by the Committee on Data for Science and Technology (CODATA) is (6.674 08 ± 0.000 31) × 10⁻¹¹ m³ kg⁻¹ s⁻² with a relative uncertainty of 47 parts per million. This uncertainty is the smallest compared with previous CODATA recommended values of G; however, it remains a relatively large uncertainty among other fundamental physical constants. In this paper we briefly review the history of the G measurement, and introduce eleven values of G adopted in CODATA 2014 after 2000 and our latest two values published in 2018 using two independent methods.  相似文献