秩与非零特征值个数的差为1或2的矩阵的性质

以矩阵方幂的秩为基本工具,对秩与非零特征值个数的差为1或2的矩阵做了等价刻画。作为应用,只用矩阵的秩可给出相应矩阵的 Jordan标准形。     

高校图书馆内部空间设计策略及其文化影响

[目的/意义]在高校图书馆功能和运行模式转变背景下,通过图书馆内部设计,改善学习环境、人文环境,进一步彰显校园文化特色,对图书馆立足服务职能、提高图书馆文化影响力起着积极的作用。[方法/过程]结合国内外先进图书馆的不同特色,以北京农业职业学院图书馆内部空间建设实践为例,探讨高校图书馆内部空间设计应考虑的方面及其重要性。[结果/结论]概括总结出提高和完善高校图书馆内部空间设计的“6个注重”设计策略和“4项文化”影响因素。     

面向个性化信息服务的图书馆移动用户行为分析模型设计

总结国内外图书馆移动用户行为的研究现状,为面向个性化信息服务的图书馆移动用户行为分析模型设计提供参考。采用理论研究与模型分析相结合的方法,从数据采集、数据处理与数据应用三方面研究用户行为动作序列和用户行为特征之间的关系。以前端操作行为与后端业务数据库相结合的方式定义和表示图书馆移动用户在iOS App、Android App与Web页面上与产品UI的隐形反馈行为,采集移动用户客户端基础信息字段、用户行为相关字段、配置Flume 3个方面数据,引入时间维度、用户维度、部门维度、资源维度、行为维度、入口渠道6个维度进行数据仓库层面的建模,从用户行为序列预测与用户兴趣引导两步实现数据应用。     

基于Citespace的技术机会发现研究——以物联网技术发展为例

近几年物联网市场连续保持近30%的高速增长,逐渐渗透到社会经济的各个领域,物联网已经成为全球最大市场。因此,深入研究物联网的技术机会对于提升企业核心竞争力具有重要的现实意义。本文主要借助于Citespace可视化分析软件挖掘科技论文与专利文献中有关物联网技术研究的文献,通过对比分析科技论文和专利文献中关键词聚类、技术研究热点分析发现物联网发展的两大类技术机会分别是在物联网应用层上GIS技术和平台层中多源大数据下融合计算技术,结尾部分总结了物联网行业未来发展的八大趋势。     

基于微博微信的高校社交网络信息传播特征与效率对比分析

文章对高校微博、微信平台的信息传播特征与效率展开研究。从985高校的微博、微信平台的信息服务入手,基于时间特征、内容特征、行为特征构建社交网络信息传播效率指标体系,对比分析其传播特征和效率的异同点,并进一步将微博、微信两个平台的发文主题划分为学校资讯、校园活动、思想宣传、娱乐休闲、互动交流等13个类别,探索分析发文主题与传播效果之间的关联。研究发现,高校在两个平台的发文时间分布存在差异;在传播特征指标方面,高校微博的发文数、粉丝数高于微信,但高校微信的传播效率则优于微博;另外,高校在两个平台的发文主题具有互补性,不同发文主题在两个平台的信息传播效果均存在显著差异。     

“互联网+”时代城市图书馆跨界服务发展模式研究

[目的/意义]通过此研究给图书馆跨界服务研究和图书馆发展提供参考和借鉴。[方法/过程]文章从研究城市图书馆跨界服务概念入手,在分析其动因的基础上,提出了城市图书馆基于服务集成的产业间跨界融合模式、基于"互联网+"的线上线下跨界服务模式和基于上下游协同的供应链跨界服务模式3种跨界服务模式,并根据功能的不同每种模式又可进行细分。[结果/结论]"互联网+"时代城市图书馆跨界服务是图书馆行业发展的必然趋势。     

Exploring the complex and non-linear evolution of Chinese international students’ experiences in US colleges

This article contests the narrative of Chinese international students (internationals for short) as passive and problematic to reveal the complexity and fluidity of their experiences. Simultaneously, it troubles the overly linear approach of stage theory in understanding internationals’ adjustment. Following nine first- and nine second-year students in US colleges over a year and involving them in semi-structured interviews and journal prompts, this research examined how they evolved. Findings show that while participants grew on academic and personal fronts, their experiences remained multi-dimensional, with second years being less sanguine and reporting challenges different from first years. This article argues that seeing Chinese internationals’ evolution as an uneven ascent affords a more nuanced understanding compared to a U-shape stage theory as it recognizes that while internationals are evolving, new situations provide challenges which they learn to overcome. Consequently, Chinese internationals’ growth troubles the deficit discourse around them and departs from pre-existing research around postgraduates. Findings spell implications for how the college community should enhance transcultural understanding and how future research around internationals could develop.     

Input–output decoupling control design for switched Boolean control networks

We investigate the input–output decoupling problem of switched Boolean control networks (SBCNs) in this paper. Based on the matrix expression of Boolean functions, the dynamics of SBCNs are converted into an algebraic form via semi-tensor product of matrices first. Then, using the redundant variable separation technique, we give the necessary and sufficient conditions for the existence of three kinds of controllers to detect whether an SBCN can be input–output decomposed or not, respectively, including the open-loop controllers, the state feedback controllers, and the output feedback controllers. Meanwhile, a constructive procedure is presented to construct the open-loop controllers, as well as the state feedback controllers and output feedback controllers. Finally, an illustrative example is given to show that the new results obtained are effective.     

Examining the antecedents of sport team brand equity: A dual-identification perspective

Although the practice of building brand equity in the context of professional sport teams is popular, the formation of sport team brand equity in the sport marketing literature is still relatively unknown and incompletely understood. In this study, the authors propose a dual-identification model to examine the formation of sport team brand equity in an Asia-based professional team sport setting. Baseball fans (N = 548) of the Chinese Professional Baseball League (CPBL) in Taiwan participated in the self-administered survey. A Partial Least Squares Structural Equation Model analysis revealed that marketplace characteristics (including group experience, salient experience, team history, and fan rituals) and brand-identified-related factors (including self-congruity and team brand prestige) were significantly related to identification with sport team and identification with sport team brand, respectively. In turn, both identification with sport team and identification with sport team brand were significant predictors of sport team brand equity. These findings highlight the importance of studying a dual-identification model in order to understand how sport team brand equity forms and suggest implications for sport team managers.     

多维度属性加权分析的微博用户聚类研究

[目的/意义]准确把握社交网络用户兴趣倾向,对用户进行分类并形成高聚合的用户群,对研究社交网络信息生态以及信息推荐有重大意义。[方法/过程]通过构造基于多维度的用户属性描述层次模型,根据模型数据需求从新浪微博抓取用户样本数据,对相关用户背景信息、用户博文信息以及用户行为信息的多维度属性下二阶变量进行量化,构造用户向量表达式,比较单一维度与多维度下的用户分类效果,进一步给属性赋予不同的权重值进行加权分析,在取得最优聚类效果后进行方差分析,对模型进行改进。[结果/结论]基于多维度属性加权后的用户聚类效果明显高于单一维度及多维度非加权条件下的用户聚类,且用户博文内容维度对于提高用户聚类效果的有效性最大。