基于扩展DREL模型的数字版权管理系统设计

本文阐述了在远程教育学习平台中运用数字版权管理(DRM)技术实现实时管理的方法,扩展了权利描述语言模型,设计了免费师范生远程教育平台中数字版权管理系统结构框架,描述了该系统中在线用户使用数字资源的具体使用过程,以及如何保证有限的数字学习资源得到合理有效的利用.     

数字广播应用于实验教学的探索和实践

将科研成果转化为实验教学内容对于加强科研与教学的结合、改进实验教学体系和内容、培养学生的工程能力和创新能力具有重要意义。论文在介绍数字广播DRM软件接收机优势的基础上,分析了DRM系统的设计思路和实现方法,介绍了基于PC的软件接收机的工作原理及利用软件构建软件接收机的实现方案,并详细阐述了数字广播(DRM)系统转化为实验教学内容的技术路线、实验内容、实验特色等内容,从而在系统实验层面培养学生的综合实践和创新研究能力。实践证明,通过科研成果向实验内容的转化,可以让学生了解学科前沿,培养学生综合运用基础知识分析问题和解决问题的能力,掌握从事本学科研究工作的基本方法和技能,增强创新意识,提高创新能力,从而有效地促进实验教学水平的提高。     

数字权利管理系统的互操作与体系结构

数字权利管理系统互操作性问题的最终解决取决于其体系结构的标准化。从DRM的垂直市场应用模式现状出发,结合MPEG、OMA、CORAL等典型互操作解决方案,分析了现有DRM系统的主要解决思路,并借鉴计算机网络开放系统互联模型的体系结构思想,通过对DRM技术要素及功能的研究归纳,提出了一种开放、层次化的DRM体系结构模型,探讨了层次之间的相互关系以及针对互操作的DRM系统各层应解决的主要问题,为DRM技术的标准化研究提供了新的视角。     

基于OFDM的数字调幅广播系统

介绍正交频分复用(OFDM)系统的原理、特点及其在慢时变多径信道中的模型,并给出它在DRM数字调幅广播中的应用.     

基于WMRM的精品课程教学资源DRM系统的研究

该文分析了传统的教学资源版权保护措施存在的弊端,简要阐述了数字版权管理Digital Rights Management（DRM）的工作原理,重点研究了微软的版权保护Windows Media Rights Manager（WMRM）技术,并提出基于WMRM技术的精品课程教学资源DRM系统的模型.该DRM系统模型,从技术角度上解决了版权保护的问题,不仅有效地保护了教学音视频、课件等教学资源,同时也方便了教学的管理.     

DRM系统中打包器的设计与实现

数字版权管理（DRM）是数字信息产生和传播快速增长的需要,也是电子商务数字内容交易市场发展的一个关键问题。通过阐述DRM技术中打包器的设计思想、程序架构设计、流程设计、数据库与存储过程设计,明确了打包器设计与实现。     

数字版权保护技术在远程教育中的应用

在远程教育中,多媒体教学资源是最重要的学习资源和教育产品,为了保护办学单位的知识产权和利益,有必要在技术上对重要的教学资源进行保护。本文通过对当前常用数字产品保护技术特点的比较,阐述了在现有的远程教育系统中运用数字版权管理(DRM)技术实现教学资源保护的方法。     

一种基于移动代理的数字版权管理系统框架

数字版权管理(DRM)是知识产权保护的一个重要研究方向，而移动代理是用于数字版权管理的主要技术。本分析了典型数字版权管理系统中存在的缺陷，探讨了移动代理技术应用于数字版权管理中的优势，提出了一种基于移动代理技术的数字版权管理系统模型，并讨论了其安全问题。     

The Limits of Cultural Translatability in Yang Xianyi’s Translation of Poems in A DRM

Poems are the products of national culture, and A Dream of Red Mansions (A DRM) is the collection of Chinese culture in the era when the novel was written, so poems in A DRM express a wealth of cultural messages. According to the Limits of Translatability raised by Catford in 1965, cultural untranslatability occurs when a relevant situational feature for the SL text is absent in the TL. So this paper aims to find problems of cultranslation of poems in A DRM, and tries to further restrict cultural untranslatability by applying compensation strategies.     

电子课本数字版权管理方案设计与技术验证

作为一种数字化学习资源、工具和产品,电子课本涉及众多利益相关者。如何兼顾与平衡相关各方的利益,在全球范围内都是一个极为敏感的问题。版权管理的核心就在于促进合理使用和利益平衡。基于电子课本内容包装规范的数字版权管理（DRM）加载方案,将电子课本内容保护的粒度分为课本整体和内容对象两个级别,使得电子课本的内容保护具有更大的弹性和使用度,可以对整本课本进行保护,也可以对具体的内容对象进行保护。方案并不干涉或限定电子课本出版商如何实施内容保护的具体技术,而是从标准的角度,提供一套加载于电子课本内容包上的技术方案,并抽象出DRM的核心元素与实现机制,用以支持电子课本数字版权保护的灵活性和可用性。经过技术验证,该方案并未对电子课本客户端造成额外计算量和负担,能够满足电子课本对数字版权保护的轻量级、可用性、易实施需求。     

Geospacial information utilized under the access control strategy

This paper introduces a solution to the secure requirement for digital rights management (DRM) by the way of geospacial access control named geospacial access control (GeoAC) in geospacial field. The issues of authorization for geospacial DRM are concentrated on. To geospacial DRM, one aspect is the declaration and enforcement of access rights, based on geographic aspects. To the approbation of digital geographic content, it is important to adopt online access to geodata through a spacial data infrastructure (SDI). This results in the interoperability requirements on three different levels: data model level, service level and access control level. The interaction between the data model and service level can be obtained by criterions of the open geospacial consortium (OGC), and the interaction of the access control level may be reached by declaring and enforcing access restrictions in GeoAC. Then an archetype enforcement based on GeoAC is elucidated. As one aspect of performing usage rights, the execution of access restrictions as an extension to a regular SDI is illuminated.     

用DR法求解计及湿度影响的复合材料叠层扁壳大挠度弯曲问题

动态松驰法(DR法)是求解工程实际非线性问题的一种有效的、简单的方法、本文采用DR法首次对计及湿度影响的复合材料叠层扁壳的非线性弯曲问题进行了分析。     

A model for increasing decision making potential through standardized test scores

The development of a model for more effective usage of group administered standardized tests is developed. The primary assumption is that summary data from these instruments are not used in curricular decisions for groups larger than the classroom unit, and a method is illustrated which uses item groupings from subtests allowing a more effective use of the data for program and curricular decisions. Several cautions are presented with respect to data usage in the recommended fashion, i. e., item data usually have low reliability coefficients, and criterion levels which identify problems in the curriculum are difficult to establish.     

数字水印技术在DRM中的应用

本介绍了两种版权保护新技术——数字版权管理技术和数字水印技术，探讨了数字水印技术在数字版权管理中的应用．并对其安全问题进行了分析。     

The effect of adaptive versus static practicing on student learning - evidence from a randomized field experiment

Schools and governments are increasingly investing in adaptive practice software. To date, the evidence whether adaptivity improves learning outcomes is limited and mixed. A large-scale randomized control trial is conducted in Dutch secondary schools to evaluate the effectiveness of an adaptive practice program relative to a static program. Learning theories predict that adaptive practicing is more effective, but this experimental evaluation provides a more nuanced picture. Relative to the static software environment, students working in the adaptive software environment receive more difficult exercises, practice longer and answer fewer questions correctly. Takeup and usage of the software program is, overall, modest, but varies considerably within and between classrooms. The outcome differences between both environments are more pronounced in classrooms with higher practice intensity. On average, no test score effects are found, but static practicing does improve test scores for higher ability students (0.08σ). Caution is thus warranted when adaptive practice software is implemented to address individual learning needs, as static formative test preparation can be more effective in improving test scores.     

Developmentally invariant dissociations in children's true and false memories: not all relatedness is created equal

The role of categorical versus associative relations in 5-, 7-, and 11-year-old children's true and false memories was examined using the Deese-Roediger-McDermott (DRM) paradigm and categorized lists of pictures or words with or without category labels as primes. For true items, recall increased with age and categorized lists were better recalled than DRM lists. For false items, recall increased with age except for picture lists, there were no differences between categorized and DRM lists and no effect of priming, and there were fewer false memories for pictures than words. Like adults, children's false memories are based on associative not thematic relations, whereas their veridical memories depend on both. This new, developmentally invariant dissociation is consistent with knowledge- and resource-based models of memory development.     

电大教学资源应用中存在的问题与对策

目前,在我国电大系统教学过程中,仍存在着教学资源有效应用率不高的问题,究其原因是多方面的,需要采取相应的对策,才能有效地提高现代远程高等教育教学资源的应用率。