短跑教学中如何发挥教师的主导性和学生的主体性

采用调查与实验对比的方法,论述了短跑教学中有利于发挥教师的主导性和学生的主体性的几个操作步骤。     

论运动训练和竞赛中教练的角色与作用

运用归纳与演绎的方法，从信息论、控制论、系统论以及教育学的视角分析了运动训练和竞赛中教练的角色与作用问题。指出了教练在运动训练和竞赛中具有主导作用、中坚作用、纽带作用和表率作用，探讨了认识运动训练和竞赛中教练角色和作用的意义。     

足球游戏在足球教学中的作用及运用

通过对文献资料的研究和实践观察分析 ,认为在足球教学中 ,运用足球游戏可以培养学生的兴趣 ,发展学生的体能和智力 ,有利于学生更好、更快地掌握足球运动的各种技术与技能 ,对足球教学起到良好的促进作用。     

基于点云数据的复杂型面实体建模研究

文章针对复杂型面产品的特点,从工业产品设计的实际应用出发,提出将正向设计的尺寸和定位关系设计方法和逆向设计的复杂曲面设计方法有效结合起来,基于点云数据实现产品的实体模型重建。以摩托车覆盖件为例,利用逆向工程软件从点云数据中提取和重构特征曲线与曲面,然后将这些几何元素信息在正向设计系统中结合特征建模方法创建整体三维CAD模型。     

基于角色的数字图书馆知识产权初始推定

本文从数字图书馆的角色出发，简要分析了数字图书馆可能遇到的知识产权问题以及基于其角色的知识产权初始推定.     

Two-stage statistical language models for text database selection

As the number and diversity of distributed Web databases on the Internet exponentially increase, it is difficult for user to know which databases are appropriate to search. Given database language models that describe the content of each database, database selection services can provide assistance in locating databases relevant to the information needs of users. In this paper, we propose a database selection approach based on statistical language modeling. The basic idea behind the approach is that, for databases that are categorized into a topic hierarchy, individual language models are estimated at different search stages, and then the databases are ranked by the similarity to the query according to the estimated language model. Two-stage smoothed language models are presented to circumvent inaccuracy due to word sparseness. Experimental results demonstrate that such a language modeling approach is competitive with current state-of-the-art database selection approaches.     

图书馆在版权平衡中的多种利益角色分析

多种利益角色的存在是图书馆版权平衡提出的现实基础；如何科学合理地划分图书馆在版权平衡体系中的利益角色是实现图书馆版权平衡的最终落脚点。现对这两者的相关理论问题进行探讨。     

基于P2P的适应性信息检索系统的设计

针对现有搜索引擎的不足，提出了一个基于P2P的适应性信息检索系统设计方案，详细介绍了系统的各主要模块的功能和技术方法，进而分析了该模型的优势。     

From Archive,to Access,to Experience––Historical Documents as a Basis for Immersive Experiences

Libraries have been the key to preserving culture and historic legacy for centuries. One such treasure cataloged in The Pennsylvania State University (Penn State) Libraries is a collection of over 33,000 Sanborn? Fire Insurance Maps. Originally kept safe in metal drawers, the library has embarked on a journey to digitize this abundance of information, combine it with other media such as photographs, and make it accessible through a web interface. Inspired by these efforts, we accessed this information and took it to the next level. Using state of the art 3D modeling and immersive technologies, we created a historic 3D model and immersive experiences of Penn State, exemplarily for the 1922 campus. The resulting experiences can be accessed through the web but also through head mounted displays (HMDs) and mobile phones in combination with VR viewers such as the Google Cardboard. Additionally, they can be used anywhere in the world or on the campus itself as a way to enable remote and in situ experiences and learning. Immersive experiences let us connect to the past, the present and the future, and as such offer value to digital cultural heritage efforts.     

Two Necessary Elements of Being A Good Language Teacher

How to be a good language teacher has always been a hot topic in both academic and practical areas.This passage discusses about two elements which are important in the view of the author.A good lesson and the role of a teacher have been discussed in this passage.