基于e-portfolio的学生评价策略的研究

课程评价既是学校教学活动的基本环节,也是保证学校教学沿着正确的方向向前发展的重要手段。文章立足于新课程评价改革的目标,介绍了档案袋(Portfolio)及电子档案袋(e-Portfolio)评价法,深入分析了利用e-Portfolio进行学生评价的必要性,并提出了一套基于e-portfolio的学生评价策略。     

循环经济视角下废旧家电逆向物流模式研究

废旧家电作为特殊的固体废弃物,具有环境危害性与再利用经济性。对废旧家电的回收再利用不仅可以节约资源、保护环境,还可以强化企业竞争优势、提高客户服务水平,符合循环经济“资源-产品-废弃物-再生资源”的发展理念。对家电制造企业而言,实施逆向物流首要的关键问题是选择和确定逆向物流回收模式,这将决定其逆向物流运作的绩效。基于循环经济理念,通过我国废旧家电回收现状及常见模式的分析,构建了一个符合我国国情的联合回收模式。     

图书馆数字资源访问统计研究

分析了国内外图书馆数字资源访问统计的研究现状，探讨了进行图书馆数字资源访问统计的方法，比较了数字资源访问统计的指标，并就目前我国图书馆数字资源访问统计存在的问题进行了讨论。     

论信息港的电子信息资源网络体系建设--黑龙江信息港的实证考察与发展构想

本文以黑龙江信息港电子信息资源体系建设的实证考察为基础,介绍了信息港信息资源组成的一般结构及其作用,分析了信息港电子信息资源建设的现状与不足,探讨了在国家信息资源网体系建设及国民经济信息化中信息港的历史职责,并重点论证了信息港建设特色电子信息资源网络体系的意义、内容、难点及应当采取的一些重点对策。     

Multi-lagged-input iterative dynamic linearization based data-driven adaptive iterative learning control

This article presents a multi-lagged-input based data-driven adaptive iterative learning control (M-DDAILC) method for nonlinear multiple-input-multiple-output (MIMO) systems by virtue of multi-lagged-input iterative dynamic linearization (IDL). The original nonlinear and non-affine MIMO system is equivalently transformed into a linear input-output incremental counterpart without loss of dynamics. The proposed learning law utilizes the desired trajectory to cancel the influence from iteration-by-iteration variations, as well as additional multi-lagged inputs to improve control performance. The developed iterative estimation law is more effective and also makes estimation of the unknown parameters easier because the dynamics for each parameter to represent are decreased by dividing the system into multiple components in the multi-lagged-input IDL formulation. Moreover, the proposed M-DDAILC does not need an explicit and accurate model. It is proved to be iteratively convergent with rigorous analysis. Both a numerical example and a practical application to a permanent magnet linear motor are provided to verify the validity and applicability of the proposed method.     

互联网上的在线电子图书服务

本文探讨了目前我国在线电子图书服务的概况、特点、发展情况及主要的网站,并对图书馆所提供的电子图书服务做了着重的介绍。     

我国发展电子商务的问题与对策

电子商务在全球领域内蓬勃兴起,加快我国电子商务发展意义重大,本文从电子商务的内涵入手,分析了电子商务的交易流程,结合我国的实际情况,具体分析了我国发展电子的主要困难,并针对存在的困难,提出了应采取的措施。     

The information seeking behaviour of the users of digital scholarly journals

The article employs deep log analysis (DLA) techniques, a more sophisticated form of transaction log analysis, to demonstrate what usage data can disclose about information seeking behaviour of virtual scholars – academics, and researchers. DLA works with the raw server log data, not the processed, pre-defined and selective data provided by journal publishers. It can generate types of analysis that are not generally available via proprietary web logging software because the software filters out relevant data and makes unhelpful assumptions about the meaning of the data. DLA also enables usage data to be associated with search/navigational and/or user demographic data, hence the name ‘deep’. In this connection the usage of two digital journal libraries, those of EmeraldInsight, and Blackwell Synergy are investigated. The information seeking behaviour of nearly three million users is analyzed in respect to the extent to which they penetrate the site, the number of visits made, as well as the type of items and content they view. The users are broken down by occupation, place of work, type of subscriber (“Big Deal”, non-subscriber, etc.), geographical location, type of university (old and new), referrer link used, and number of items viewed in a session.     

全文电子期刊个性化服务应用研究

全文电子期刊数据库的个性化服务,是指数据库提供者基于Web数据库技术,根据用户特殊要求或特定情况,提供给用户所需的有针对性的信息,或指数据库的这一系统功能。探讨了它的特点和种类。图5。参考文献4。