语境系统的范畴化解析

文章借鉴范畴化理论相关内容,在徐思益先生语言理论的基础上,对语境整体作了系统、简明地概括。将语境概括为语义语境与语用语境两大核心范畴,语用语境分为必要语境与特定语境,必要语境是典型成员,特定语境是其延伸。     

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。     

小议“解放思想”

解放思想是发展中国特色社会主义的一大法宝,解放思想永无止境,坚持解放思想必须把马克思主义普遍真理与中国具体实践相结合,不断开创中国特色社会主义新局面。     

我国人力资本生产制度缺陷及其深层原因

我国人力资本生产的制度性缺陷主要表现在:人力资本投资制度、教育管理制度、人力资本进退制度、教育过程制度、培训制度、产权制度以及非正式制度等方面。其深层次原因在于:制度创新供求主体乏力、制度的路径依赖、意识形态刚性强化现有制度“锁定”、制度实施机制不健全以及制度间的不协调和冲突。     

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。     

阿尔泰紫菀精油成分分析

采用常规水蒸气蒸馏法提取阿尔泰紫菀精油,经GC-MS分析共分离出46个峰,鉴定出31种化合物.主要成分为单萜和倍半萜,占精油检出成分的80.14%,其中较多的有:大根香叶烯(18.14%)、1,1,4,7-四甲基-八氢化-1氢-环丙基奥(7.38%)、β-蒎烯(6.40%)、石竹烯(6.30%)、β-水芹烯(3.97%)、苎烯(3.12%).     

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.     

论Geo—slope中背水面边界条件选取问题

对西安市某均质土坝,库水位在最高水位的工况下,用有限元分析软件Geo—slope计算分析了背水面不同高度的透水边界对渗流场和背水面边坡安全系数的计算结果的影响。结果发现,背水面透水边界在合理的高度以下上升时总流量、出溢流量、出溢口处水力坡降、背水面边坡安全系数增大;背水面透水边界在合理的高度以上升高时这四个代表值减小。说明了合理的背水面透水边界为各个流场代表值和边坡安全系数的极值点。