非线性多变延迟奇异摄动问题的稳定性分析

讨论了形如x′(t) =f(x(t) ,x(t -τ1(t) ) ,… ,x(t -τm(t) ) ,y(t) ,y(t -τ1(t) ) ,… ,y(t-τm(t) ) )和εy′(t) =g(x(t) ,x(t -τ1(t) ) ,… ,x(t -τm(t) ) ,y(t) ,y(t -τ1(t) ) ,… ,y(t -τm(t) ) ) (0 <ε 1)的非线性多变延迟奇异摄动系统的理论解的稳定性 ,得到了系统稳定的一个充分条件 .在此条件下还证明了隐式Euler方法的数值解是稳定的 .     

制作多媒体课件改革电子技术教学方法

本文介绍了电子技术课程在教学方法改革和实践方面所做的工作，总结了设计制作多媒体课件的主要经验和结合课堂教学的方式方法。     

福建省各城市金融竞争力的测度与比较分析——兼论莆田市提升金融竞争力的对策

通过构建城市金融竞争力的评价指标体系,运用统计方法对福建省九个城市金融竞争力进行了评估和简要分析,最后对提升莆田城市金融竞争力提出若干建议。     

齐思和治史方法简论

齐思和在史学领域做出的突出贡献和他的史学方法密切相关,而《中国史探研》一书则是其史学方法的集中体现。将其史学方法归纳为描述性统计法、比较研究法、本末缕叙法等三种方法,并举实例予以说明。     

Early years teachers and the influence of Piaget: evidence from oral history

In studying the historical development of early years provision, a clear factor in raising its profile was the growth in scientific study of children, especially the reception and interpretation of Piaget's research. For an understanding of how the mediation of new thinking and new discoveries influenced students and teachers, textbooks provide an important documentary source, but evidence is also available through oral history in the living memories of practitioners themselves. This paper draws on the testimony of early years teachers who began their careers between 1927 and 1955 and continued teaching into the 1960s and 1970s. The account below begins with reflections on psychology and education in the early decades of the twentieth century drawn from a 1936 conference organised by the Nursery School Association of Great Britain, and from a widely used textbook that represents the gradual trend towards ‘fragmentation’ of educational theory into a multiplicity of disciplines. Reference is then made to two popular textbooks by prominent Froebelians, Brearley and Hitchfield, and by Ruth Beard illustrating the growing influence of Piaget as a post facto rationale for a pedagogy that was proceeding by instinct. Walkerdine, Lister and Hall are researchers who have investigated from various angles the impact of Piagetian psychology on primary practice, but the process whereby this translation from the laboratory to the classroom takes place is one that demands further investigation. Vital evidence lies in the living memories of early years teachers whose careers spanned the 1930s to the 1970s and a rich quality and personal texture of the data is apparent as retired early years teachers recounted their professional careers. It offers a more complex account than the grand narratives that historians have traditionally compiled from purely documentary evidence centring on great thinkers, key texts and policy initiatives. The role of in‐service education was clearly important in the experiences recalled in this paper. Above all we find evidence of a distinctive shift in teacher–child relationships over that historical period and of the contribution made to this by psychological theory, epitomised in the figure of Piaget and in his focus on the individual learner.     

网络学习中的“信息迷航”问题初探

网络教育的兴起正在使更多的教师和学生将教学活动转移到网络上,这种新的教学方式在带给我们快捷和便利的同时也给我们带来了一些新的问题,正视这些问题并深入分析直至解决它们将网络教育发挥更大的作用。“信息迷航”正是其中普遍存在而又亟待解决的一个重要问题。     

差异是数理统计思想方法的重要滋生点

在随机性数学模型的研究中,必须注意观察数据之间的差异.如何从千差万别的数据中提炼我们所需的信息,便产生了重要的数理统计的概念和思想方法.     

自主性学习的特征及其方式

自主性学习是创新学习的方法之一，应充分认识自主性学习的特征，正确地选择适合自己学习个性特点的学习方法，提高学习效率。     

均匀设计法优化双环戊二烯基铁电化学合成的条件

运用均匀设计法研究双环戊二烯基铁电化学合成的条件.试验表明:在槽电压为1.5 V、反应温度为40℃、无水乙醇与环戊二烯的体积比为5.46的条件下,获得了品质良好的产品,收率达90%以上.     

试析董仲舒"天人合一"学说的论证方式

汉儒董仲舒在《春秋繁露》中,主要运用了类比论证的方式将儒家"天人合一"思想系统化、理论化。董仲舒的"天人合一"说及其论证方式折射出中国传统思维方式的整体性特征。这种思维特征对中国人的政治思维方式影响至深。