浅议教师的素质与修养

教师素质的高低与国家综合国力的提高和民族的振兴息息相关。建设高素质的教师队伍是当前需要认真研究和解决的一项重要课题。教师必须加强自己的专业知识、教育理论和师德方面的修养,才能适应教育事业的发展和改革的需要。     

流态化预分解技术与增加余热发电项目的研究

流态化预分解技术是将生料经流态化分解炉分解后,经旋风筒分离入窑使窑增产,并且将排出的高温气体供余热锅炉、汽轮发电机发电．本将这一先进技术应用在老水泥厂的技术改造上,并对流态化预分解炉和旋风筒的结构进行了确定、设计、计算和说明．实践证明,该技术改造项目使我厂水泥熟料的产量每小时增加了4吨,发电量每小时增加了320KW,经济效益可观．     

兰州市城区稳定边界层变化规律的初步研究

兰州市城区空气污染严重与其特殊的大气边界层密切相关。利用兰州市城区现有大气边界层探测资料,采用多种稳定度参数计算方法,统计分析了该市大气层结稳定度的时空分布规律及其与天气形势的关系,发现兰州市城区冬季大气稳定边界层日间存在发生或发展的特有现象,并探寻了其形成机制,从而为兰州市开展空气污染预报提供可靠的理论依据.     

毛乌素沙地荒漠草原狭叶锦鸡儿-小针茅群落地上生物量对气候因子的动态响应

对毛乌素沙地荒漠草原围封样地狭叶锦鸡儿 小针茅群落地上生物量进行了 7年逐月连续观测,建立了生物量对气候响应的逐月回归模型。研究表明,光、温、水等不同的气候因子在植物生长不同时期表现出不同的影响,其中降水因子在生长季各个月份都是显著影响因子,说明水分的限制作用突出。应用逐月回归模型对三种不同气候条件下生物量的波动范围进行预测,并将逐月回归模型与传统的累积回归模型的模拟结果进行比较,表明在大多数年份逐月回归模型具有更高的精度。逐月回归模型是对传统的累积回归建模方法的有益改进。     

运动与促红细胞生成素

论述了促红细胞生成素对红细胞数量与血红蛋白含量的中心控制作用,运动训练对促红细胞生成素产生的影响,以及服用重组织促红细胞生成素对机体的危害性。     

中国森林资源及木材供需平衡研究

在全国分析中国森林资源状况的基础上,从生产、进出口、消费等方面系统地研究了中国木材供需状况。天然林保护工程的实施将使中国木材由供过于求,转变为供不应求,为此除增加木材进口渠道、扩大进口量外,还应通过实施木材替代战略、积极培育森林资源来解决。     

论我国学校体育改革的趋势与目标

通过对学校体育出现的问题进行分析,指出了现行的学校体育课程设置是产生一系列问题的主要根源,已成为影响实现学校体育目标的最大障碍。必须从根本上彻底修改或取消现行的《教学计划》和《教学大纲》模式。理想的学校体育应该是在学校体育工作的指导下,学生们自由选择１～２项活动内容进行重点培养提高,为终身体育打好基础。     

被忽视的大学英语课堂教学功能

大学英语教学应该承担多种功能。但在实际授课中,大学英语课堂却在实用主义、观念狭隘等因素的影响下,异化成了简单技能培养和表层知识传授的场所。中国文化的英文表述、中西文化内在的思维差异、还有道德教育均遭到了不同程度的"阉割"。从微观和宏观相结合的角度出发,参照高等教育人才培养目标,在重新审视目前大学英语教学中存在的种种缺陷的基础上,分析这些缺陷的成因,并提出相应对策。     

影响大学生自主运动参与的主成因子分析

采用问卷调查法,针对影响大学生自主体育运动的因子做相关调查分析,结果显示:影响大学生运动自主参与主要有以下6项因子:教材的内容和教学方法因子,教师因素,个人不太成功的运动史因子,自身身体素质的限制因子,受中国传统文化的影响因子,素质教育落实不力因子。就各因子在影响大学生运动自主参与方面的原因做具体分析。     

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

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.