On extracting recommendation knowledge for personalized web-based learning based on ant colony optimization with segmented-goal and meta-control strategies

Personalized web-based learning has become an important learning form in the 21st century. To recommend appropriate online materials for a certain learner, several characteristics of the learner, such as his/her learning style, learning modality, cognitive style and competency, need to be considered. An earlier research result showed that a fuzzy knowledge extraction model can be established to extract personalized recommendation knowledge by discovering effective learning paths from past learning experiences through an ant colony optimization model. Though that results revealed the theoretical potential of the proposed method in discovering effective learning paths for learners, critical limitations arose when considering its applications in real world situations, such as the requirement of a large amount of learners and a long period of training cycles in order to discover good learning paths for learners. These practical issues motivate this research. In this paper, the aim is to resolve the aforementioned issues by devising more efficient algorithms that basically run on the same ant colony model yet requiring only a reasonable number of learners and training cycles to find satisfactory good results. The key approaches to resolving the practical issues include revising the global update policy, an adaptive search policy and a segmented-goal training strategy. Based on simulation results, it is shown that these new ingredients added to the original knowledge extraction algorithm result in more efficient ones that can be applied in practical situations.     

小说翻译中的风格群

着眼于风格的动态特征,分析小说风格起伏变化的原因,并提出“风格群”的概念,籍此帮助译者更好地理解并再现小说的风格。一部作品根据风格的动态变化可以切分成不同群类。风格群内相对统一的风格特征有助于完整再现风格。风格群间的风格变化,有助于再现风格起伏。最后通过实例进行对比,阐述了风格群在重现风格变换和把握风格特征中的功用。     

单向坡斜拉桥体系转换分析与控制措施

利用ANSYS程序的APDL建立了彭溪河特大桥的平面有限元模型,分析单向坡在体系转换中对结构内力和位移的影响,认为单向纵坡斜拉桥内力分布呈非对称性,因此在体系转换时主梁易受到不平衡力的冲击.在此基础上,提出了减小单向纵坡对其体系转换影响的控制措施.     

加强研究生学风建设的思考

针对目前我国研究生学风存在的一些问题,对其产生的原因进行了剖析,并提出加强和改进研究生学风建设的一些建议,即:加强研究生德育教育,培养研究生的科学精神;改进和完善研究生教育管理机制;开展学术交流活动,营造浓厚的学术氛围;加强导师对研究生的引导作用。     

探索城市改造中的建筑设计策略--深圳市盐田区深盐路建筑改造设计

以现代城市设计理论为指导,阐述深盐路建筑改造设计的原则,方案构思及项目实施成果。     

Injury risk among children of low-income U.S.-born and immigrant mothers.

The number of immigrants in the United States is at an all time high, yet psychologists have largely ignored the domain of immigrant health. This article considers 1 aspect of immigrant health, risk for pediatric injury. A sample of over 5,000 5-year-old children from impoverished families was studied; approximately 13% had immigrant mothers. Children of immigrants had a significantly lower rate of injury in the prior year. This was particularly true of non-White children of immigrants. Three possible mediators for this finding--assistance with parenting, parenting style, and health care accessibility--were considered, but none explained the difference. The need for further research on the topic and implications of results for injury prevention are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

认知法和认知风格及其在外语教学中的运用

本文从认知法的历史特点,认知风格的差异性及它们在外语教学中的运用三个方面进行阐述,指出教师们应该在教学中根据学生个体的差异,采用不同的方法,从而达到好的教学效果。     

基于禁忌搜索算法的VLSI布局

将禁忌搜索算法应用于VLSI门阵列的布局问题，建立了以总线长度和通道拥挤度的布局目标函数，用禁忌搜索算法求解目标函数的最小值，通过实验仿真，将本算法和遗传算法进行了比较，结果表明不论在解的质量和收敛速度方面，禁忌搜索算法优于遗传算法。     

一种实时系统软件体系结构风格:NewRob

该文分析了现有的软件体系结构风格描述语言的特点,并结合嵌入式实时系统的领域特征,提出了一个面向嵌入式实时系统的软件体系结构风格:NewRob。NewRob所生成的一个基本说明书,由一个同步控制任务组成,它负责将系统作为包含各类异步组件的集合,进行动态重构。控制任务通过对各组成元件逐级细化、分解,得到进化后的低级控制任务,每个低级任务也都管理一个新的组件集合。采用时序逻辑描述和验证不同抽象级别的软件体系结构的一致性。     

Mapinfo空间数据在Oracle数据库中无损存储的方法研究

Oracle Spatial是大型数据库管理系统Oracle用于解决GIS领域中海量空间数据存储的空间数据扩展．在利用Oracle Spatial进行Mapinfo空间数据存储的过程中，标注和风格等空间信息会发生丢失．通过对Mapinfo的空间数据模型和Oracle空间数据模型的比较分析，找到空间信息丢失的原因，进而提出一种把丢失的空间信息进行必要的提取、组织、还原，以达到无损空间数据存储的方法．