平板边界层扰动演化特征的研究

基于空间模式计算不可压缩边界层,基本流选用平板层流Blasius解,采用高精度的紧致有限差分格式数值模拟三维边界层扰动方程。并应用具体的算例,研究了入口不同扰动幅值对转捩位置的影响,以及不同小幅值下扰动的演化特征。     

体育协会脱钩改革与体育监察体系的应对转型

辨析体育协会改制后其法律主体地位的重构及监察范围的重新界定,在此基础上讨论体育监察体系的重塑。认为:尽管体育协会改制后实现管办分离,成为具有独立法律地位的社团法人,但改制后的部分协会仍属于行使公权力的社会组织,协会内部公职人员应纳入监察监督范围。体育协会监察范围的确定可以公权力和自治权的边界为主线,结合权力来源和依据、专属性和开放性等标准,在个案中进行综合判断。体育监察体系应以平衡体育自治与监察监督为基本原则,进一步更新监察法律规范,以权力清单明晰权力和监督边界,构造综合性体育监察体系,建立高效的体育腐败监察调查机制。     

论文化自觉与文化界限

文化自觉是建设社会主义先进文化的必由之路,是划清文化先进与落后界限的重要标尺。中国特色社会主义先进文化建设必须坚持文化自觉,通过文化自信、文化自立、文化自省,以历史的尺度、价值的尺度、自我的尺度观照中华文化的历史进程,巩固先进文化的主导地位,廓清文化界限。     

《万寿寺》里的时间

《万寿寺》里的时间具有多重功能,既是小说的主题,又是小说的形式因素：时间的小说塑形指向对自我之谜的探索,通过不断将故事时间放到一个新的时间起始处的手法,以及跨越时间与空间的叙事技巧,将自我扩展为一段广阔的时空,创造出自我的奇异的文学形象。     

一类四阶两点非线性奇异特征值常微分方程边值问题正解的存在性

考察边值问题y(4)=λ(fx,y) y(0)=y(1)=y″(0)=y″(1)=0的正解的存在性和多解性,其中λ>0,推广了[2]的结论.     

基于下边界的邻域粗糙集特征选择方法

粗糙集理论能够有效地处理不完整、不确定和不精确的数据信息。文章在邻域粗糙集的基础上,引入了下边界作为属性冗余性的判断条件。在全部特征的前提下删除某一特征后,根据样本集合的正域变化情况来确定被删除特征的重要性,从而确定特征是否为冗余特征。文中所使用的数据集合来源于UC I数据集。通过实验可以看出：这种方法可以从大量的特征中有效地选择出重要特征。     

非线性2m阶微分方程边值问题解的存在性和多重性

利用强单调映象原理和临界点理论讨论2m阶微分方程边值问题{（-1）^m·u^（2m）（t）=f（t,u（t））,t∈[0.1] u^（2i）（0）=u^（2i）（1）=0 （i=0,1…,m-1）,其中f：[0,1]xR^1→R^1连续,得到其解的存在性和多重性．     

From splendid isolation to crossed boundaries? The futures of teacher education in the light of activity theory

Many policy documents addressing the future of teacher education do not take into account the fundamental unpredictability of the future, nor the opposing forces that will try to influence that future. Through the analysis of 48 scenario documents on the future of education or teacher education, we identified a set of unpredictable key factors that have to be taken into account when addressing the future of teacher education. We also identified four main futures that may lie ahead for teacher education. We analyzed these four scenarios using the concepts of activity systems, boundary objects, and boundary crossing. This revealed that the extent to which activity systems are open to boundary crossing and are willing to remove institutional boundaries will largely define the future that lies ahead for teacher education. Future scenarios in themselves can play a role as boundary objects that facilitate the dialogue and boundary crossing between these activity systems.     

从文本批评到文化批评——20世纪西方批评范式转换与文学边界

20世纪被称为＂批评的世纪＂,其批评范式转向表现为从文本批评向文化批评的转变。这使得文学意义的内部体系进一步向外部开放,文学固有的边界被消蚀。其中文本批评对文学边界的固守和文化批评对文学边界的逾越显现了文论范式的发展必然,反映了文学在政治、科技、文化的冲击下遭遇的难题。对此,我们应以审慎的态度理性对待批评范式的转换与文学边界的移动,既要保持文学的自主性,又要不失其开放性品格,使文学在动态的移动之中显示其生机与活力。     

Elaborating pedagogical content knowledge: what it means to know students and think about teaching

The purpose of this study was to examine how a teacher understood her students and then thought and made decisions about content, curriculum and pedagogy. Pedagogical content knowledge (PCK) and Deweyan philosophies of experience and education provided the theoretical frameworks. Data were collected through observations (N?=?38) and interviews (N?=?38) over four months and analysed using constant comparison. Findings indicated that this teacher possessed a broad repertoire of knowledge about students that she used to think and make decisions about content, curriculum and pedagogy. The connections between knowing students and thinking about teaching were more sophisticated and interconnected than is typically recognized or articulated in teacher knowledge literature. Three themes are used to explain how this teacher understood her students’ emotional and social lives in and out of her classroom, and ways it influenced her thinking and teaching. The discussion centers on the need for more comprehensive analyses of teachers’ pedagogical content knowledge.