“实践性”作业是转变学习方式的必经之路     

许勇  王道延 《中国教育研究与创新》2005,2(7):95-96

本文从四个方面论述了数学“实践性”作业是转变学生学习方式的良策法宝：①“实践性”让学生在生活中感受数学；②“实践性”作业能提高学生用数学思想来看待实际问题的能力；③“实践性”作业能创设生活情景，提高学生解决问题的能力；④“实践性”作业悄悄地让学生主动、快乐地学习。  相似文献   

A pilot scale trickling filter with pebble gravel as media and its performance to remove chemical oxygen demand from synthetic brewery wastewater     

Haimanot Habte Lemji  Hartmut Eckstädt 《Journal of Zhejiang University. Science. B》2013,14(10):924-933

Evaluating the performance of a biotrickling filter for the treatment of wastewaters produced by a company manufacturing beer was the aim of this study. A pilot scale trickling filter filled with gravel was used as the experimental biofilter. Pilot scale plant experiments were made to evaluate the performance of the trickling filter aerobic and anaerobic biofilm systems for removal of chemical oxygen demand (COD) and nutrients from synthetic brewery wastewater. Performance evaluation data of the trickling filter were generated under different experimental conditions. The trickling filter had an average efficiency of (86.81±6.95)% as the hydraulic loading rate increased from 4.0 to 6.4 m³/(m²·d). Various COD concentrations were used to adjust organic loading rates from 1.5 to 4.5 kg COD/(m³·d). An average COD removal efficiency of (85.10±6.40)% was achieved in all wastewater concentrations at a hydraulic loading of 6.4 m³/(m²·d). The results lead to a design organic load of 1.5 kg COD/(m³·d) to reach an effluent COD in the range of 50–120 mg/L. As can be concluded from the results of this study, organic substances in brewery wastewater can be handled in a cost-effective and environmentally friendly manner using the gravel-filled trickling filter.  相似文献   

论提升优秀游泳运动员运动寿命的策略     

田小静  徐洋 《游泳》2022,(1)

随着体育全球化的推进,各种体育赛事层出不穷。游泳是奥运会的重要比赛项目,奖牌多,影响力大。新形势下,世界泳坛百花争艳,各国选手都极具竞争力,而我国游冰运动员的运动寿命短暂,平均年龄低于国外选手,忽视了许多大器晚成的优秀运动员。因此,本文通过介绍“运动寿命”的定义,分析我国优秀游泳运动员的培养现状,讨论造成优秀游泳运动员运动寿命短暂的因素,寻找延长优秀游泳运动员运动寿命的策略。  相似文献   

“跳百索”作为实施全民健身计划有效载体的可行性分析     

苏中军  丁华  张婧 《军事体育进修学院学报》2009,28(1)

跳百索即跳绳,是我国一项古老的传统运动项目,具有许多其他体育项目无法比拟的优点。就跳绳运动的健身功能、推广跳绳运动的可行性等方面展开论述,并提出实施方法、建议。旨在使人们了解跳绳运动,促使跳绳运动焕发新的生机与活力。开展与普及适合国情民情的跳绳运动,必能为全民健身计划的实施发挥应有的作用。  相似文献   

对我院健美操普修教学大纲及其内容改革的初步研究     

王美  杨琬  刘建兵 《首都体育学院学报》2000,(2)

我院根据社会发展和教学改革的需要 ,于 1999年制订并执行了新的健美操教学大纲。本文对新健美操教学大纲的制订依据、指导思想及大纲的结构、内容进行了研究 ,提出了执行新大纲应注意的问题和相应的对策。  相似文献   

肌酸的补充与运动能力(综述)   总被引：15，自引：0，他引：15  

杨则宜 《体育科学》2000,20(1):76-78,93

肌酸已成为最流行的能力增强剂。国外大量有关肌酸的文献认为,运动人体使用肌酸使运动后磷酸肌酸的再合成速度加快,力量和速度增强。肌酸使肌细胞通过水的摄取来促进蛋白合成率,从而改变体成分。肌酸同单糖一起使用可以刺激胰岛素的分泌,使肌肉摄取更多的肌酸。目前尚未见肌酸对肝、肾和血液系统功能的副作用和肌酸引起肌肉痉挛和损伤的研究报道。  相似文献   

关于学校实施《国家体育锻炼标准》若干问题的研究   总被引：1，自引：0，他引：1  

钱雯 《广州体育学院学报》2000,20(4):49-53

《国家体育锻炼标准》在中小学实施近50年后,面临着全面的改革。这个改革的方向无疑与在学校实施《国家体育锻炼标准》的实践效果有关,采用文献资料法、问卷调查法,揭示了《国家体育锻炼标准》在学校实施过程的问题所在;预测新的学生体育锻炼制度应具有的性质和功能;并对其与教学的关系进行了展望。  相似文献   

高校体育教学中实施快乐体育可行性研究     

唐苏俐 《南京体育学院学报(社会科学版)》2000,(4):37-39

分析了我国现行体育教育的现状．指出当前体育教育的片面性,即只重身体,忽视心理健康发展。在深刻剖析快乐体育的内涵的基础上,指出在学校体育教育中实施快乐体育将对实施素质教育、健康教育产生积极影响．并将导致全民健身运动的有效落实。从而证明在学校体育中实施快乐体育是切实可行的。  相似文献   

加强体育院校课余活动引导 促进大学生综合素质提高     

杨晖  朱红 《南京体育学院学报(社会科学版)》1999,(4)

运动技术的教学和训练离不开对运动技术时空特征的研判。对不同训练水平的教学对象需根据其运动时的技术时空特征采用合适的教学和训练方法才能实现运动技术的最优化。  相似文献   

Prevalence and correlates of meeting the muscle-strengthening exercise recommendations among Chinese children and adolescents: Results from 2019 Physical Activity and Fitness in China—The Youth Study     

Fei Xin  Zheng Zhu  Sitong Chen  Huan Chen  Xiaoqing Hu  Xiao Ma  Kun Liang  Yang Liu  Lijuan Wang  Yujun Cai  Ang Chen  Yan Tang 《运动与健康科学(英文)》2022,11(3):358

PurposeThis study aimed to describe the national prevalence of Chinese children and adolescents who met the World Health Organization muscle-strengthening exercise (MSE) recommendations and identify correlates of meeting the MSE recommendations.MethodsCross-sectional data from the 2019 Physical Activity and Fitness in China—The Youth Study, a nationally representative sample of Chinese children and adolescents (n = 80,413; mean age = 13.7 years; 53.9% girls) and their parents, were analyzed. Children and adolescents who reported engaging ≥3 days (up to 7 days) of MSE per week were classified as meeting the MSE recommendations. MSE, demographics, lifestyle behaviors (sport participation, moderate-to-vigorous physical activity, screen time, and sleep duration), exercise intention, peer and parental support, and parental MSE participation were assessed through self-reports. Logistic regression models were used to determine the correlates of meeting the MSE recommendations. The analyses were completed in 2020.ResultsOverall, 39.3% of children and adolescents met the MSE recommendations. Girls, 10th–12th graders, minorities, those from lower income households and those from families with lower parental education were less likely to meet the MSE recommendations. Children and adolescents who were proficient in ≥2 sports were more likely to meet the MSE recommendations (adjusted odds ratio (aOR) = 1.44, 95% confidence interval (95%CI): 1.26–1.65), as were those with more moderate-to-vigorous physical activity (aOR = 1.57, 95%CI: 1.53–1.61). Additionally, children and adolescents with high exercise intention (aOR = 1.60, 95%CI: 1.51–1.69), those whose parents met the adult MSE recommendations (aOR = 1.46, 95%CI: 1.40–1.52), and those who received high peer (aOR = 1.27, 95%CI: 1.20–1.34) and parental support (aOR = 1.07, 95%CI: 1.04–1.12) were more likely to meet the MSE recommendations.ConclusionLess than two-fifths of Chinese children and adolescents met the World Health Organization MSE recommendations. The correlates identified in our study can help inform the development of school and community based strategies and policies to enhance participation in MSE and improve muscular fitness of all Chinese children and adolescents.  相似文献