有意义学习理论与课堂教学改革

奥苏伯尔有意义学习理论的核心要素包括两个方面,一是学习者必须具备有意义学习的心向、适当的认知结构和积极主动的学习态度;二是学习的材料必须具有逻辑意义.因此,在课堂教学实践中教师必须做到以下三点第一,激发学生的学习动机和兴趣;第二,根据学生认知结构的特点组织实施教学活动;第三,发挥学生学习的积极性和主动性.     

发展远程教育是实现西部地区教育腾飞的必然选择

随着计算机技术、网络技术和电子通信技术的迅速发展和应用,带来教育信息资源的极大丰富和教育手段的多样化.要实现西部地区的经济腾飞,必须使其教育腾飞,要使教育腾飞,必须解放思想,勇于创新,改变传统教育模式,大力发展远程教育是必然选择.     

Optimal algorithms for uncovering synteny problem

The syntenic distance between two genomes is the minimum number of fusions, fissions, and translocations that can transform one genome to the other, ignoring the gene order within chromosomes. As the problem is NP-hard in general, some particular classes of synteny instances, such as linear synteny, exact synteny and nested synteny, are examined in the literature. In this paper, we propose a new special class of synteny instances, called uncovering synteny. We first present a polynomial time algorithm to solve the connected case of uncovering synteny optimally. By performing only intra-component moves, we then solve the unconnected case of uncovering synteny. We will further calculate the diameters of connected and unconnected uncovering synteny, respectively.     

视频点击流数据挖掘在远程教育中的应用

Web数据挖掘已经成为数据挖掘技术一个重要的应用领域,文章主要通过对远程教育网站的视频点击流日志文件进行数据挖掘,寻求用户访问规律,构建动态的个性化教育网站.     

The Center Location Improvement Problem Under the Hamming Distance

In this paper, we consider the center location improvement problems under the sum-type and bottleneck-type Hamming distance. For the sum-type problem, we show that achieving an algorithm with a worst-case ratio of O(log |V|) is NP-hard, and for the bottleneck-type problem, we present a strongly polynomial algorithm.     

语用层面的象似性考察

本文主要探讨了象似性理论在语言中的体现,着重对其四原则:数量象似性原则、距离象似性原则、顺序象似性原则、标记象似性原则在语用层面上进行了分析,论述了其在象似性话语中的功能。旨在为语用研究开辟新的视野,也为语言象似与语言功能的结合作出新的尝试     

Slack free MEA and RDM with comprehensive efficiency measures

This paper extends two directional distance function models, the Multi-directional Efficiency Analysis (MEA) Model and the Range Directional Model (RDM), in order to account for any type of technical inefficiency, i.e. both directional and non-directional inefficiencies. We first focus on the variable returns to scale (VRS) case, because both VRS-MEA and RDM are translation invariant models, which mean that both models are able to deal with negative data. Our main result is the definition of a new comprehensive efficiency measure which is units invariant and translation invariant and covers both models. Secondly, we introduce the RDM model under constant returns to scale (CRS) together with a new comprehensive efficiency measure.     

社会语用距离、话语礼貌与翻译中的礼貌原则

礼貌是一种社会文化现象,也是人际交往的基本准则。话语是交际双方特定社会语用距离的反映,话语礼貌取决于交际双方对交际语用距离推断的一致程度及后起的应对策略。交际语用距离在动态语境中推断和确定并随交际因素的改变而改变,话语礼貌具有相对性、动态性和可协调性。翻译应当重视语用距离与话语礼貌的关系、语言选择对话语礼貌策略的影响,明确话语礼貌拟定的相对性、动态性和可协调性,力图实现礼貌对等。     

拉近师生距离方略

要建立民主、平等的新型师生关系,就必须拉近师生的距离。这种拉近距离的主动权掌握在教师手中。常用的方法有:敢于道歉;开辟对话角;给学生让个座;多与学生沟通;运用赏识教育。     

现代远程教育与高校图书馆关系探析

现代远程教育是网络时代教育发展的一种新型教学模式。阐述了现代远程教育的内涵及其时代的创新性、学习的探究性、学习的独立性和自主性、教学方法的灵活多变性等特征,分析了高校图书馆在现代远程教育中的重要作用和独特优势,探讨了现代远程教育与高校图书馆互为依存的关系。