边界条件的齐次化方法

在求解数理方法过程中,常遇到非齐次边界条件的定解问题,本文介绍使边界条件齐次化的一般方法。     

非线性二阶边值问题解的存在性

利用上下解方法讨论了一类二阶边值问题解的存在性问题 ,并给出了一种求解方法。     

翻转课堂的理论局限及功能边界

当前,翻转课堂方兴未艾,无论是从理论研究层面还是从实践操作层面都具有其正功能。但是,翻转课堂的理论局限性及功能边界（逾越边界则正功能转变为负功能）必须引起警示。翻转课堂的理论局限性主要表征为如下四个方面：现代化教学媒介的局限性、学习方式翻转的局限性、师生互动拓展的局限性、教育目的延展的局限性。翻转课堂的功能边界表征为两大部分：正-负功能边界、效度功能边界。其中,前者主要表征为：一般功能失调导致的翻转负功能、相对功能失调导致的翻转负功能。后者主要表征为：以能否实现实质性的探究性学习为表征的教学论边界、以能否实现翻转课堂诸教学环节之间的伦理整合为表征的价值论边界。翻转课堂进行翻转的目的不能局囿于知识学习效率的提升,而应该通过培育学习者的自主自控能力、与教师展开深层次学习互动的能力,从而培育全面发展的学习主体,并最终实现师生共在式的教育幸福及价值主体性。     

基于“网孔法”的点云数据边界提取技术的应用

根据零件表面的数字化数据提取零件表面的边界是反求工程的关键步骤.针对完全散乱的、无组织的点云数据,首先,利用网格法得到边界网孔和非边界网孔,把所有相邻的边界网孔相互连接起来,得到边界网孔环;把边界网孔环中每个边界网孔的最小凸边求出来就得到一段边界线,把各个分段的边界线连接起来就得到初始边界线,然后利用B样条技术对边界线进行光顺处理,得到理想的曲面边界.实践证明,通过该方法得到的边界曲线能满足工程应用的需要.     

军用软件的黑盒测试方法综述

在对军用软件进行功能测试时,通常采用黑盒测试方法,常用的黑盒测试方法有等价类划分法、边界值分析法、错误猜测法、因果图法和场景法等。在设计测试用例时针对实际军用软件综合应用这几种黑盒测试方法。     

Early stages in building hybrid activity between school and work: the case of PénArt

This formative intervention documents the emergence of a hybrid activity aiming at student engagement and academic achievement. In this context-bound study, early stages of this activity consisted in establishing PénArt meant to enable high school students with difficulties to start up their own business at school. It involved reaching agreements between a high school and a youth centre so that high school students engage in the production and selling of their branded t-shirt. At the frontiers of their respective activity system, students, youth workers, special education teachers and members of the school board took actions to cross boundaries and redefine their interrelations. Cultural historical activity theory was fruitful to document the development of a new object-oriented activity. Tensions and contradictions revelaled to be the key moments in the emergence of the hybrid activity. Expansive learning led us to understand that, in a conflicting situation, a collective’s agentive actions create an expansive form of learning and leads to a successful entrepreneurship experience. Change laboratory capacity to foster change for cooperative education in Quebec was successful. The students enrolled in a regional entrepreneurship contest and won it. That was a significant event for students with low self-esteem linked with their performance at school.     

公共权力边界分析——兼议转型中国公共权力建设

私人权利与公共权力的冲突永恒地贯穿于人类政治文明发展历程中。国家权力来源于个人权利,并在终极意义上应当服务于个人权利。公共权力的活动空间在于社会公共事务而不可侵犯私人领域。否则,将对个人自由形成重大威胁,阻碍社会自主性因素的成长。转型中国公共权力建设需要确立＂权利本位＂、＂以人为本＂的价值导向和根本原则,积极推进公民有序的政治参与,完善权力运行监督与制约机制,培育成熟公民意识。