虚模式下存储器管理的特权保护规则图解模型

在教学过程中,内存访问中特权保护条件成为微机原理虚模式教学环节中的瓶颈。用构建简单明了的图示模型可以使复杂问题简单化,使之更易理解。     

Technical Skills Required: How Technological Efficacy Influences Online Political Behavior

Rapid advances in technology have provided the potential to connect citizens to their surroundings in unprecedented ways. While many scholars examine different types of efficacy as a predictor of behavior (e.g., internal, external, and political), it is essential to examine how confident citizens feel in their ability to use the technology before understanding how they will use it politically. Research shows that perceived competence increases motivation, which is correlated with behavior. This study examined how traditional measures of efficacy and a new measure affect online political behaviors, concluding that technological efficacy is a reliable construct predicting online news use and expression.     

网络舆情信息受众的观点认知距离计量研究

[目的/意义] 量化展现网络舆情信息受众之间的观点认知距离与情感归属,澄清其情感倾向性的形成脉络,为科学应对群体性突发事件提供思路。[方法/过程] 切分舆情事项子话题,通过情感本体计算受众观点的极性强度,构建2-模的受众-关注焦点隶属矩阵和1-模的受众关系矩阵,并采用复杂网络可视化图谱对受众认知距离进行可视化展示,从网络舆情场的视角下阐述受众观点的互斥与耦合机制,描述受众情感倾向的形成脉络。[结果/结论] 对受众整体认知网络中不同类型的受众加以区分,揭示真实情景中的网络舆情场力的作用特点,为舆情受众情感疏导工作提供实践出发点。     

新高考评价体系下物理等级考的试卷特征

作为新高考改革的组成部分,上海市物理学业水平等级性考试经过了2017年-2019年最初三年稳慎有序的实施,试卷呈现出稳定的概貌。本文依据新高考"一核四层四翼"评价体系,从"必备知识、关键能力、学科素养"的考查内容方面,归纳提炼了三年来上海物理等级考的试卷特征。作为素质教育的组成部分,新高考评价体系下物理等级考的测试导向,必将更好地引导物理学科教学与评价的价值追求。     

The effect of modifiers on the stability of a vinyl acetate/ethylene copolymer dispersion

This paper examines the effect of modifiers on the stability of a vinyl acetate/ethylene copolymer dispersion adhesive upon aging. Eighteen common modifiers were added to a well-characterized vinyl acetate/ethylene copolymer dispersion (Dur-O-Set^® E-150) in known concentrations and dry-film samples were subjected to 16–17 years of dark aging and seven to eight years of light aging. Yellowing, pH, gloss, swelling, cohesive strength, and flexibility were monitored for changes upon aging. Generally, the neat Dur-O-Set^® E-150 (no additives) was found to become acidic on aging, but was fairly resistant to yellowing. It also swelled substantially in toluene, was of high gloss, medium strength, and flexible, and remained so on aging. No modifier was found to improve these properties. Various solvents, wetting agents, and thickeners did not alter the properties by much, while plasticizers, freeze-thaw stabilizer, glycerin, and certain fillers had a more negative effect.     

国外数据科学研究的回顾与展望

[目的/意义]随着大数据的发展,数据科学已经成为新的研究领域。厘清国外数据科学的发展与研究现状,可为我国今后的研究提供参考与借鉴。[方法/过程]利用Web of Science核心合集数据库对国外有关数据科学的文献进行检索,并对作者、研究方向等外部特征与关键词、主题等内容特征做计量分析;在此基础上,通过逐篇阅读与归类,从数据科学的内涵界定与应用方向两大方面进行综合分析。[结果/结论]最后,结合现有研究面临的问题与解决的方法,对数据科学的未来进行展望。     

公共档案馆微信公众平台服务质量评价研究

[目的/意义] 从用户感知角度对公共档案馆微信公众平台服务质量评价进行深入地分析与探讨,为公共档案馆微信公众的平台技术改进和服务质量的提升提供数据支持和参考。[方法/过程] 通过问卷调查构建公共档案馆微信公众平台服务质量评价框架和评价假设模型,运用SPSS软件,并利用探索性因子分析法对假设模型进行检验,根据结果对评价假设模型进行修正,并对修正后的评价模型进行讨论。[结果/结论] 构建公共档案馆微信公众平台服务质量评价模型,从用户的视角全面衡量微信平台上公共档案馆服务的效果和用户满意度。     

Public Library Services for Veterans: Selected Brief Case Studies

Public libraries across the country design and deliver programs for military veterans and their families, often collaborating with other organizations and agencies. The examples were assembled from both general and specialized interviews with librarians, and literature and Internet searches, with summaries of programs assembled and written by multiple researchers. The specific limitations on the listing in this article are clearly outlined in the first section. Overall, however, the article provides a good introductory overview of what’s going on in veteran’s programs and services in America’s public libraries in over seventy libraries in forty states. We hope this list of what public libraries have organized or are doing will supply other public librarians with ideas on how to provide new services or enhance their existing ones.     

试论21世纪教师应具备的职业意识

教师是社会群体中特殊的职业,它担负传承人类文明、培育一代新人的神圣使命,其职业本质和道德规律要求教师必须具备树人意识、师表意识、奉献意识、创新意识和合作意识。惟有此,方能使教师的职责得以实现,使学生受到良好的教育。