全力推进依法治校 办好国家开放大学

依法治校是现代大学重要的办学理念,是建立现代大学制度的基本要求,也是办好让党和国家放心、让人民满意大学的根本途径。国家开放大学作为利用现代信息技术从事远程开放教育的新型高校,应认识并利用开放教育发展的规律,把握教育改革和发展的政策机遇,制定或修订相关规章,全力推进依法治校,办好国家开放大学。     

一种面向高校图书馆的个性化图书推荐系统

个性化图书推荐主要是以用户特征和借阅行为为挖掘对象,通过获取用户的兴趣特征及隐含的需求模式,实现用户与图书相互关联的个性化图书推荐服务。本文通过挖掘用户的背景信息构建用户特征模型,然后在设计喜好值计算、用户相似度计算和内容相似度计算以及标签信息获取方法的基础上,研究多种不同的图书推荐方法,以挖掘用户的潜在信息需求。最后利用图书馆的真实数据设计面向高校图书馆的个性化图书推荐系统,同时以标准网络数据集通过实验验证来评估推荐方法的有效性。     

超磁致伸缩作动器的磁路设计

论述了超磁致伸缩作动器的基本原理,根据三种偏置磁场优缺点,选用增加单独线圈产生偏置磁场。在磁路分析的基础上,采用有限元仿真的方法,分析了不同参数和结构对各个组成部分的磁场影响。     

Remote access laboratories in Australia and Europe

Remote access laboratories (RALs) were first developed in 1994 in Australia and Switzerland. The main purposes of developing them are to enable students to do their experiments at their own pace, time and locations and to enable students and teaching staff to get access to facilities beyond their institutions. Currently, most of the experiments carried out through RALs in Australia are heavily biased towards electrical, electronic and computer engineering disciplines. However, the experiments carried out through RALs in Europe had more variety, in addition to the traditional electrical, electronic and computer engineering disciplines, there were experiments in mechanical and mechatronic disciplines. It was found that RALs are now being developed aggressively in Australia and Europe and it can be argued that RALs will develop further and faster in the future with improving Internet technology. The rising costs of real experimental equipment will also speed up their development because by making the equipment remotely accessible, the cost can be shared by more universities or institutions and this will improve their cost-effectiveness. Their development would be particularly rapid in large countries with small populations such as Australia, Canada and Russia, because of the scale of economy. Reusability of software, interoperability in software implementation, computer supported collaborative learning and convergence with learning management systems are the required development of future RALs.     

数字图书馆的社会模拟技术研究

数字图书馆的非文献资源包括用户、用户产生的信息和用户行动,它们是社会网络、社会媒体与虚拟世界的元数据对象。在虚拟世界系统的基础上(含登记系统、地图系统、动态消息系统、快照系统和库存系统等),讨论数字图书馆能够以用户建模和信息系统模块来发展虚拟科研环境、虚拟校园和虚拟知识型社会等。     

PDC and Non-PDC fuzzy control with relaxed stability conditions for contintuous-time multiplicative noised fuzzy systems

This paper presents a relaxed scheme of fuzzy controller design for continuous-time nonlinear stochastic systems that are constructed by the Takagi–Sugeno (T–S) fuzzy models with multiplicative noises. Through Nonquadratic Lyapunov Functions (NQLF) and Non-Parallel Distributed Compensation (Non-PDC) control law, the less conservative Linear Matrix Inequality (LMI) stabilization conditions on solving fuzzy controllers are derived. Furthermore, in order to study the effects of stochastic behaviors on dynamic systems in real environments, the multiplicative noise term is introduced in the consequent part of fuzzy systems. For decreasing the conservatism of the conventional PDC-based fuzzy control, the NQLF stability synthesis approach is developed in this paper to obtain relaxed stability conditions for T–S fuzzy models with multiplicative noises. Finally, some simulation examples are provided to demonstrate the validity and applicability of the proposed fuzzy controller design approach.     

农业高职教育校企贯通“4—1—1”人才培养模式的探索与实践

“4—1—1”人才培养模式是根据高等职业教育发展规律,结合农业行业特点和学院自身发展的实际情况,经过长期的教学实践和理论探索而形成的一种以工学结合为主要特征的人才培养模式。文章就“4—1—1”人才培养模式提出的背景、形成过程及其内涵、形成的依据和组织实施等方面进行了详细的阐述,并对实施效果进行了总结分析。     

基于STM32的塔式太阳能热发电定日镜双轴控制实验系统设计与实现

针对塔式太阳能热发电系统中定日镜的逐日跟踪问题,开发了一套用于定日镜双轴运动控制的实验系统。采用STM32F407为主控单片机,实现Modbus-TCP通信、EEPROM非易失性参数存储、正交编码信号计数,基于STM32内部灵活的计数器结构,以硬件的方式实现了脉冲信号的可控输出,减轻了CPU的工作负载,提高了系统稳定性、响应速度和跟踪精度。实际应用表明,该系统运行稳定,跟踪精度高,结构精简,具有较高的可靠性,达到了预期的设计目的。     

When the child gets in the news? A case study on the national written media in Turkey

The main purpose of this study is to analyze news stories regarding children in the national print media in the last five years using top eight newspapers in terms of circulation and evaluate these news stories based on the Convention on the Rights of the Child, which was issued by the UN and signed by Turkey. The research was undertaken as a case study. The study data were collected from top eight newspapers in terms of circulation between 2010 and 2014 in order to reveal when and how newspapers at national level represent children and the scientific content of impressions in the national media. Results show that children appear in the national media in mostly negative cases. In conclusion, it was observed in this study, children’s rights to life, development, protection, and participation were violated at both national and international levels. In this sense, news reflects the truth about “children’s rights violations”. However, the way that children appear in news and reflection in media constitute a secondary children’s rights violation.