相平衡与CO2在水中的扩散速率--CO2排水集气法

根据相平衡等的有关计算可知，常压下CO2溶于水的过程为物理吸收，CO2的饱和水溶液为稀溶液，而且溶液里碳酸的生成和电离可以忽略不计。CO2在水中的扩散系数非常小，其数量级为10^-5cm^2／s，在CO2排水集气法操作中，CO2气体不被水吸收。     

常系数齐线性微分方程组的一种解法

从广义特征向量的定义出发,给出了常系数齐线性微分方程组的一基本解组的形式,运用此基本解组形式解常系数齐线性微分方程组比较简单.     

当代大学生体育兴趣的研究

研究旨在系统了解当代大学生体育兴趣现状并发现存在的主要问题,为进一步深化学校体育改革提供依据.研究表明,有82%的大学生对体育活动抱有兴趣,健身、调节心理与娱乐是大学生参加体育活动的主要价值取向;场地器材短缺、体育课不能使学生获得良好的心理生理体验,是影响学生体育兴趣的主要因素.建议增加学校场地、器材设施的建设,改革体育教学,加强学生课外体育活动组织建设,培养和激发学生的体育兴趣.     

TbFeO_3纳米晶的制备及其光催化活性

以Tb4O7、Fe(NO3)3.9H2O、硝酸(1:1)为原料,在柠檬酸体系中用溶胶凝胶法合成了具有钙钛矿结构的稀土复合氧化物TbFeO3;用XRD、TEM对产物的组成、颗粒、大小、形貌进行了表征;结果表明,产物为纳米颗粒,平均粒径为21 nm左右,且颗粒均匀。另外以TbFeO3为光催化剂,对多种水溶性染料进行了光催化降解,发现TbFeO3有较好的光催化效果。实验表明,在无光照条件下,TbFeO3的脱色效果初期较明显,但效果达到一定程度后不再明显,并且随时间的推移,甚至有所下降。在光照条件下,TbFeO3的脱色效果初期短时间内就特别明显,最后接近100%.     

A consideration for physical literacy in Irish youth,and implications for physical education in a changing landscape

The concept of physical literacy (PL) has been suggested as one that can offer a catalyst for a new emphasis in physical education (PE). In the broadest sense, a physically literate child is confident, active, and can maintain health enhancing physical activity (PA) for life. PL includes engagement in PA, physical competence, and PA motivation, confidence, knowledge and understanding. The purpose of this study is to investigate the levels of PL in Irish adolescents. As part of a larger study data were collected from 535 (12.78?±?.42 years) adolescents across 20 schools, to measure physical activity, physical competence, and psychological correlates of physical activity. Less than half of participants are accumulating the minimum of 60 minutes of PA daily required for health (49% males, 26% females). Data highlight that Irish youth are performing ‘below par’ across the domains of PL, with cardiovascular fitness (45% of males and 67% of females reaching ‘optimal’ target) and self-efficacy (53% of males and 46% of females reaching ‘optimal’ target) of greatest concern. Findings are discussed in the context of the need for a targeted direction in post-primary PE in Irish schools to increase levels of PL in Irish adolescents.     

综合实践活动课程中培养学生自主学习能力

自主学习能力是信息社会和终身学习时代各类人的必备素养。综合实践活动课程中培养学生自主学习能力的策略包括:激发学生的内在学习动机,协助学生进行活动的计划安排和时间管理,教会学生利用社会性和物质性的资源,督查学生的反思能力。     

A quasi-experimental research on the educational value of performance assessment

The purpose of this study is to demonstrate that performance assessment increases educational value in teachinglearning activities using a quasi-experimental research design. In this research, the three measurement criteria of educational value are suggested as ‘improvement & advancement,’ ‘sincerity & enthusiasm,’ and ‘individuality & wholeness.’ A pre-test was administered to 4 classes (156 students) in 7th grade. Classes were divided into an experimental group (2 classes, 79 students) and a control group (2 classes, 77 students), according to the pre-test results. Only the experimental group was involved in the performance assessment for 9 weeks. The results of this study show that performance assessment has a positive effect on the educational value of teaching-learning activities in schools.     

素质教育条件下活动课的开展

教育部编订的《九年义务教育小学思想品德课和初中思想政治课课程标准(修订)》有一个突出的特点,就是强调对学生创新精神与实践能力的培养,较大幅度增加了实践活动的要求。学校、学生乃至整个社会如何面对这一新的变化要求,已成了当前教育界的一个热门话题。本文从教学工作的实际出发,结合各方特点,浅析了在素质教育条件下如何开展好活动课。     

微孔膜内大分子有效扩散系数的计算

报道一种计算分子尺寸与构型对微孔内大分子有效扩散系数影响的理论方法。基于刚性圆球分子在圆柱型孔内的扩散理论，定义分子平均投影半径和水力学球半径，分别用于估算孔内外浓度分配系数和孔内水力学拖曳力。对不同构型的大分子，使用该法计算的有效扩散系数与已发表的实验数据吻合良好。     

试论新形势下高校学生党员教育活动的创新与实践

新形势下,高校学生党建工作应开辟多种教育活动形式,寻找新的载体、探索新的方法,以加强对高校学生党员的培养教育,全面提高大学生党员的整体素质。