实正定矩阵的若干判定方法

运用高等代数中一系列矩阵论的相关知识，给出了实对称正定矩阵的若干判定方法，对一般实矩阵正定的性质和判定作了初步的讨论和研究，得到了一般实正定矩阵的几个重要性质和判定定理。     

Selection for special education services: the role of gender and socio-economic status

Children from some demographic groups disproportionately receive special education (SE) services. Due to methodological shortcoming in existing work, it remains unclear whether this is due to real differences in academic needs or cultural selection/bias. Hence, in a community sample of 1250 Norwegian children, we examined the role of third grade SE services, academic test scores, behavioural problems, and teacher’s level of helplessness in mediating the effect of family socio-economic status (SES) and students’ gender on fifth-grade SE services. Results revealed no direct effects of either gender or SES on fifth-grade SE, but four mediated pathways were identified: (1) Boys had a greater likelihood of receiving fifth-grade SE services when (a) they previously received SE and (b) they experienced more ADHD symptoms, both in third grade. (2) Students from low-SES families were more likely to receive SE services in fifth grade when (a) they performed poorly in math in third grade and (b) their teacher reported greater feelings of helplessness when teaching these students. The findings are discussed with respect to the differential-needs hypothesis, mechanisms of cultural selection and the possibility of gendered selection for SE at younger ages.     

如何利用科学探究方法转变学生的学习方式

学生是学习的主体,通过科学探究,转变学生的学习方式,使学生从被动学习转为主动学习,体验学习的乐趣,从中获取知识和技能。     

发挥“思想道德修养”课理论功能的设想与尝试

要提高“思想道德修养”课的有效性 ,不仅要积极地推进教学方法、教学手段及考试形式的改革 ,更重要的是要发挥“思想道德修养”课的理论功能。如何有效发挥其理论功能呢 ?首先 ,要明确理论的出发点和落脚点。其次 ,提高理论的权威性。第三 ,加强理论的针对性     

规训与交往——两种自由观念对现代道德教育的启示

文章在阐述规训与交往的理论基石即现代道德教育中“逻各斯中心主义”的基础上,从规训与交往的视角反思了现代的道德教育,认为现代的道德教育,正以“压迫”、“奴役”甚至是“暴力”的手段对学生的消极自由进行着“规训”,以“启发”、“诱导”、“灌输”等手段对学生的积极自由进行着不平等的交往,但大学校园的亚文化,学生的价值观念和道德准则却是在自由自主地阅读、上网等各种不同的交往途径中形成的。     

正循环钻孔灌注桩施工工艺及其工序质量控制

结合正循环钻孔灌注桩的施工实践，介绍了每道作业工序的施工关键，提出了应采取的质量预控措施。     

电视新闻报道正负效应的思考

负面报道是对新闻报道意识形态化倾向的反拨;正面报道中的不良手法致使产生负面效应;负面报道常常聚焦社会反常现象,客观上反映了现实矛盾;负面报道的取材更容易迎合受众收视需求,所以有较高的收视率。对负面报道要正面定位;报道宗旨应有破有立;注意报道民生内容要追求理性剖析;媒体应参与受众互动,实现功能延伸。     

团圆主义模式的积极意义

文艺中的团圆主义模式并非中国独有，而是一种世界文学现象。这一模式总是关涉着比较强烈的伦理主义倾向，它在本质上是人们借助文学方式从伦理上重建世界秩序以实现至善愿望的反映。从肯定性的一面来看，这一模式至今不绝的生命力，既源于其植根于文艺创作的本性和人生不完善的基本处境，也因为它能够给人精神上以安慰，道德上以满足，情感上以滋润，感觉上以适意，心理上以平衡，从而具有一定合理的社会价值和心理而难以轻易地否定。     

高校网络教学资源平台的建设

本文阐述构建高校网络教学资源平台的原则、主要内容、实现技术、特色和应用效果,为提高学生学习和科研能力起着促进作用。     

The relative impact of school‐wide positive behavior support on teachers’ perceptions of student behavior across schools,teachers, and students

School‐wide positive behavior support (SWPBS) is a systemic approach for implementing a proactive schoolwide discipline and for improving students’ academic and behavioral outcomes by targeting the school’s organizational and social culture. With a multilevel approach, the present study evaluates the relative effectiveness of SWPBS on teachers’ perceptions of the student behavior (N = 3,295) across schools, teachers, and children using a multilevel approach. We assessed teacher perception of student problem behavior five times during a 3‐year implementation of SWPBS in 23 Dutch schools. Multilevel analyses not only revealed a small increase in perceived prosocial behavior and a small decrease in problems with peers, but also different effects across children, teachers, and schools. Effects were stronger for girls and for students with higher severity of perceived problems at baseline. At teachers’ level, higher mean baseline severity of perceived problems was associated with the reduced impact of SWPBS on perceived emotional problems and problems with peers. At the school level, effects were stronger for regular schools as compared with special needs schools.