影响学生数学成绩的人格因素

乐群性、聪慧性、兴奋性、有恒性、敏感性、幻想性这6种人格因素与高考数学成绩的相关性显著.聪慧性和有恒性对学生高考数学成绩有正向影响,而乐群性、兴奋性、敏感性、幻想性对学生高考数学成绩有负向影响.人格因素与高考数学成绩的相关性系数与多元回归方程的偏回归系数具有高度的一致性.     

每球得分制新规则对男排比赛得分规律影响的初步研究

通过对１９９８年“春泉王杯”男排锦标赛２８场比赛的现场观摩、临场统计和专家访谈,发现新规则对训练比赛的指导思想产生了重大影响,在比赛中得分手段的排列顺序为：一攻、防反、对失、拦网和发球。     

Multivariate statistical analysis for the surface water quality of the Luan River, China

In order to analyze the characteristics of surface water resource quality for the reconstruction of old water treatment plant, multivariate statistical techniques such as cluster analysis and factor analysis were applied to the data of Yuqiao Reservoir-- surface water resource of the Luan River, China. The results of cluster analysis demonstrate that the months of one year were divided into 3 groups and the characteristic of clusters was agreed with the seasonal characteristics in North China. Three factors were derived from the complicated set using factor analysis. Factor 1 included turbidity and chlorophyll, which seemed to be related to the anthropogenic activities; factor 2 included alkaline and hardness, which were related to the natural characteristic of surface water; and factor 3 included Cl and NO2-N affected by mineral and agricultural activities. The sinusoidal shape of the score plots of the three factors shows that the temporal variations caused by natural and human factors are linked to seasonality.     

Matching of Male and Female Subjects Using VO2 max

Abstract

We compared cardiorespiratory responses to exercise on an underwater treadmill (UTM) and land treadmill (LTM) and derived an equation to estimate oxygen consumption (VO₂) during UTM exercise. Fifty-five men and women completed one LTM and five UTM exercise sessions on separate days. The UTM sessions consisted of chest-deep immersion, with 0, 25, 50, 75, and 100% water-jet resistance. All session treadmill velocities increased every 3 min from 53.6 to 187.8 m·min^-1. Cardiorespiratory responses were similar between LTM and UTM when jet resistance for UTM was ≥ 50%. Using multiple regression analysis, weight-relative VO₂ could be estimated as: VO₂ (mLO₂·kg^-1·min^-1) = 0.19248 · height (cm) + 0.17422 · jet resistance (% max) + 0.14092 · velocity (m·min^-1) - 0.12794 · weight (kg) - 27.82849, R²= .82. Our data indicate that similar LTM and UTM cardiorespiratory responses are achievable, and we provide a reasonable estimate of UTM VO₂.     

Physical Fitness and Cardiac Risk Factors of Professional Firefighters across the Career Span

This study examined the relationship between basic psychological skills usage (i.e., goal-setting, imagery, self-talk, and relaxation) and the intensity and directional dimensions of competitive anxiety. Semistructured interviews were used on a sample of 15 elite athletes (M age = 24.3 years, SD = 4.2) from a variety of team and individual sports. Findings revealed that the participants maintained the intensity of their anxiety response prior to competition and could deploy goal-setting, imagery, or self-talk to enable facilitative interpretations of anxiety-related symptoms to performance. Higher levels of self-confidence and an optimistic outlook toward forthcoming competition were also expressed. The underlying mechanisms perceived to be responsible for these effects included effort and motivation, attentional focus, and perceived control over the anxiety response.     

完善教务管理系统提高管理水平

实现教务工作的计算机管理是提高教务管理水平，适应现代远程教育的需要，中央电大为此组织开发了适合各级电大使用的教务管理系统软件。经过几年的使用，发现系统存在不少问题，有些问题甚至会影响整个系统的正常运行，为此我们针对所发现的问题进行软件的二次开发，开发出适合我校使用的高效辅助软件，同时规范了系统的使用。开发的辅助软件及为规范系统的使用所采取的一些措施。     

培养学生创新能力的物理实验考试模式

为了提高物理实验教学质量和培养学生创新能力,实施了与教学模式相适应的、多阶段、多形式、机动灵活的考试模式,重点细化了对学生能力平时成绩评价体系,并就此考试模式和学生成绩评价体系进行了论述。     

Updating formulae for the sample covariance and correlation

This article provides an easy derivation of updating formulae for the sample covariance and, by extension, for the Pearson product–moment correlation coefficient.     

基于图形的考试成绩分析方法

考试是衡量教学效果最重要的方法和手段,其关键在于对考试结果的数据进行有效的分析,使之能够成为教学效果的评价依据。数值分析通过计算算术平均值和标准差来表示考试成绩的一般水平和集中趋势,用图形对数据进行分析可以直观地表明数据的变化幅度和趋势,能够很好地表现数据的集中区域和离散度。     

网络主题探究教学模式的设计——以《英语测试》课程考试成绩分析为例

网络主题探究教学模式(WebQuest)即学生通过网络来寻求某个问题的解决方案。该设计把现代教育技术——网络教学资源融入传统的《英语测试》课程中,以"考试成绩分析"的主题为例,研究网络主题探究教学模式及设计方法,通过定性分析和定量分析相结合的方法,探讨网络主题探究教学模式对学生及其自主学习的影响。