A demographic and epistemological divide: problematizing diversity and equity education in traditional,rural teacher education     

Keonghee Tao Han 《International journal of qualitative studies in education》2018,31(7):595-611

This study documents the experience of an Asian woman faculty in the rural Mountain West as it relates to difficulties teaching predominantly White preservice teachers about the importance of diversity and social justice to prepare them adequately with skills and materials for their P-12 classrooms in a rapidly changing world. The current challenge has its origins in US history (the macro-level) and continues into the present (the micro-level) beyond the preservice teachers to include college of education colleagues and administrators, and community members. Using nexus analysis to reveal this larger picture, the hope is to develop actions to keep the problem from persisting into the future. This study is geography-specific in that not all rural areas are predominantly White, nor do they all share the same worldview. The results suggest that rural university communities remain predominantly White in their demographic makeup and crucial actors often hold fast to Whiteness and White ignorance. This is problematic – the need to transform and change is urgent in rural teacher education programs.  相似文献   

Composite fault-tolerant control with disturbance observer for stochastic systems with multiple disturbances     

Shixiang Sun  Xinjiang Wei  Huifeng Zhang  Hamid Reza Karimi  Jian Han 《Journal of The Franklin Institute》2018,355(12):4897-4915

In this paper, a composite fault tolerant control (CFTC) with disturbance observer scheme is considered for a class of stochastic systems with faults and multiple disturbances. The disturbances are divided into two parts. One represents the stochastic disturbance with partial known information which is formulated by an exogenous system. The other is independent Wiener process. A stochastic disturbance observer is designed to estimate exogenous disturbance. To make the first type of disturbance can be rejected and the fault can be diagnosed, a composite fault diagnosis observer with disturbance observer is constructed. Furthermore, a composite fault-tolerant controller is proposed to compensate disturbances and faults. Finally, simulation examples are given to demonstrate the feasibility and effectiveness of the proposed scheme.  相似文献   

Terminal iterative learning control for discrete-time nonlinear systems based on neural networks     

Jian Han  Dong Shen  Chiang-Ju Chien 《Journal of The Franklin Institute》2018,355(8):3641-3658

The terminal iterative learning control is designed for nonlinear systems based on neural networks. A terminal output tracking error model is obtained by using a system input and output algebraic function as well as the differential mean value theorem. The radial basis function neural network is utilized to construct the input for the system. The weights are updated by optimizing an objective function and an auxiliary error is introduced to compensate the approximation error from the neural network. Both time-invariant input case and time-varying input case are discussed in the note. Strict convergence analysis of proposed algorithm is proved by the Lyapunov like method. Simulations based on train station control problem and batch reactor are provided to demonstrate the effectiveness of the proposed algorithms.  相似文献   

基于两阶段DEA的高技术企业技术创新绩效研究          下载免费PDF全文

韩兵  苏屹  李彤  万民 《科研管理》2018,39(3):11-19

高技术企业具有知识密集、技术密集等特点,是促进我国经济与社会发展的重要部分,在国家发展中占据极其重要的地位。根据高技术企业技术创新的特点,在考虑时滞效应的基础上构建高技术企业技术创新的两阶段投入产出指标体系,应用动态两阶段DEA模型对两个阶段的绩效进行评价,通过对我国27个省域2012-2015年高技术企业技术创新绩效的评价,全面分析各省高技术企业在技术研发以及技术转化两个阶段的效率。研究表明：我国各省之间的高技术企业在技术创新水平上存在很大差距,而且大部分地区的高技术企业存在重视中间成果而忽略商品化产出的问题,需针对不同地区企业技术创新的差异性提出更具针对性的对策。研究成果为更客观的评价我国不同地区间高技术企业技术创新水平提供了工具,为不同地区制定相应的高技术企业技术创新政策提供了决策依据。  相似文献   

基于自然语言词对法的文献主题新颖性探测研究   总被引：1，自引：0，他引：1  

许丹  徐爽  陈斯斯  韩爽  杨颖  郭继军 《图书情报工作》2018,62(8):130-138

[目的/意义] 提出一个全新的量化指标--文档主题新颖度,通过自然语言词对方法对文献主题内容的新颖性进行探测研究,并探讨其可行性和优缺点以及新颖度与F1000推荐文献和引文指标之间的关系。[方法/过程] 以F1000为基础,选取hematology主题近一个月内推荐的文献,在Pubmed中查找并获取该推荐文献发表之前6个月内密切相关的文献,构成整个文献集。定义自然语言法新颖度的概念、计算公式并利用Oracle数据库PL/SQL语言进行编程,通过MetaMap软件提取自然语言词汇进行文献主题新颖度的运算。[结果/结论] 自然语言法在文献主题新颖性探测的运算上具有一定的可行性;文档主题新颖度与F1000推荐文献、引用情况并非成等价关系,分属于科技论文评价的不同维度、不同范畴,不可一概而论。应将文档主题新颖度这一新指标与同行评议情况和文献计量学等其他相关论文评价指标结合起来对文献进行综合评价分析,选取优质文献给予推荐。  相似文献   

基于Rao-Stirling指数的学科交叉文献发现——以纳米科学与纳米技术为例     

韩正琪  刘小平  徐涵 《图书情报工作》2018,62(1):125-131

[目的/意义] 学科交叉文献发现是进行学科交叉研究的重要前提,从海量的文献中快速、精准地发现领域相关交叉文献有助于研究人员快速地把握领域学科交叉动态,识别领域学科交叉研究热点与前沿。提出基于Rao-Stirling指数的领域学科交叉文献发现方法,并以纳米科学与纳米技术领域为例,探讨该方法的可行性。[方法/过程] 在Web of Science数据库下载纳米科学与纳米技术领域文献,构建期刊缩写-全称-学科类别对照表,利用Python编程构建文献参考文献学科分布矩阵,利用R编程计算每篇文献的Rao-Stirling指数进行文献的学科交叉测度,根据测度结果将纳米科学与纳米技术领域文献按照学科交叉程度分为三个水平,以发现领域学科交叉文献。[结果/结论] 基于Rao-Stirling指数的领域学科交叉文献发现方法可以实现领域文献水平的学科交叉测度,并发现学科交叉文献,且该研究方法也同样可扩展到其他研究领域。  相似文献   

新环境下高校信息素养教育实践的创新探索   总被引：2，自引：0，他引：2  

韩丽风  曾晓牧  林佳 《图书情报工作》2018,62(24):12-17

[目的/意义]在迅速变化的信息技术与教育环境中,如何因时而变、因馆而宜、不断创新,开展适合高校发展的信息素养教育实践,是每个高校图书馆面临的挑战和机遇。全面剖析典型图书馆的实践和思路,有利于其他图书馆借鉴或反思。[方法/过程]系统梳理新环境下清华大学图书馆信息素养教育实践的创新举措,包括4个方面：顺应教育信息化的发展趋势,运用新技术改革教育模式;立足高校发展定位与需求,融入学校学术生态;研究信息素养教育新理念,加强科学规划与实施;契合用户群体需求特征,利用新媒体提升传播效果。[结果/结论]清华实践经验可以概括为：以新理念为指导,积极利用新技术、新媒体开拓信息素养教育的创新实践,全方位嵌入学校人才培养流程,有效融入学校学术生态,力争紧跟大学教学科研、人才培养的步伐,与新时代大学生的需求同步,但各馆的具体实施路径应因校而宜、因馆而宜。  相似文献   

Effects of motivation,academic stress and age in predicting self-directed learning readiness (SDLR): Focused on online college students     

JeongChul Heo  Sumi Han 《Education and Information Technologies》2018,23(1):61-71

The purpose of this study is to determine whether the self-directed learning readiness (SDLR) among online students might be significantly predicted by motivation, academic stress, and age. To complete the purpose of this study, the Pearson correlation and multiple-regression are analyzed. The participants for this study are college students who are taking online counseling classes at one online university in Korea. A total of 186 students responded to the web-survey questionnaire. The Pearson correlation is used to examine whether there are significant correlations among motivation, academic stress, age, and SDLR. Results show that motivation and academic stress have an influence on the level of SDLR. However, there is no significant relationship between age and SDLR. Also, the multiple-regression is used to analyze any influence on three predictors (motivation, academic stress, and age) in predicting SDLR. As a result, motivation and academic stress turn out as significant predictors which are influential in predicting the level of SDLR. However, the variable of the age among online college students is not influential in predicting the level of SDLR. Lastly, suggestions and implications are discussed for future study.  相似文献   

基于社会网络分析的区域创新关联网络研究          下载免费PDF全文

苏屹  韩敏睿  雷家骕 《科研管理》2018,39(12):78-85

以我国29个省市2000年至2015年的发明专利授权数为样本,应用Eviews软件,在对样本数据进行平稳性检验及格兰杰因果关系检验的基础上,构建区域创新关联关系网络。论文采用社会网络分析的方法,并运用Ucinet软件,分析我国区域创新关联关系网络发展状况。实证研究表明：区域创新关联关系网络整体密度为0.1687,各子群密度仍有较大差异;第一、四子群的密度明显差异于第二、三子群的密度,且第四子群省市数量最多;区域创新关联关系网络内部的各省市创新关联关系分布不均,子群间的融合度也较差。  相似文献   

我国统计信息咨询服务体系发展完善问题研究——基于三大类服务体系的探讨     

李倩  韩晋雅  王艳子 《现代情报》2017,37(2):151-156

本文在阐述统计信息咨询服务体系内涵的基础上,分析了三大类统计信息咨询服务体系的构成和特点,着重探讨了它们发展过程中存在的问题。本文认为,三大类服务体系有必要通过互助合作来实现自身的完善和发展。互助合作的形式有：合同制、行业管理组织、体系共建等。互助合作的保障措施有3个关键点：思想观念的转变、坚持基本原则和体系制度的完善。旨在为我国三大类统计信息咨询服务体系的发展完善提供丰富的理论和实践经验参考。  相似文献