高中生学习策略调查研究

用自编量表调查了一所重点高中和一所普通高中2658名学生的学习策略状况。因素分析结果显示:高中生学习策略可用一个三层次结构的图式表征,最概括的顶层为主导性和辅助性两大策略群;中间层次为学习态度调整、学习行为管理、学习方法运用、学习环境适应、课外活动调控等五大策略亚群;基层次为良好的学习心态,积极合理规划学习生活,预习和复习总结,营造学习的人际环境,劳逸结合、丰富课余生活等19项策略子群。重点高中学生、成绩好的学生、年级高的学生,在主导性策略方面存在优势,主要体现在学习态度调整和学习方法运用这2个策略亚群上。在学习策略的性别差异上,男生更善于营造学习的人际环境、运用学习行为管理方面的策略,而女生则更注重学习方法运用的策略。

Semantics-Based Compliance An a lys is o f N e two rk S e cu rity Policy Hie ra rch ie s

Network security policy and the automated refinement of its hierarchies aims to simplify the administration of security services in complex network environments. The semantic gap between the policy hierarchies reflects the validity of the policy hierarchies yielded by the automated policy refinement process. However, little attention has been paid to the evaluation of the compliance between the derived lower level policy and the higher level policy. We present an ontology based on Ontology Web Language （OWL） to describe the semantics of security policy and their implementation. We also propose a method of estimating the semantic similarity between a given