在线语言学习的发展与前景     

曹丽红 《郴州师范高等专科学校学报》2013,(3):100-104

在线语言学习作为外语学习的一种趋势,扩大了学生对教师、对课程、对时空的选择范围,这种不同于传统授课模式的学习方式受到大家的广泛关注。对在线语言学习的发展进行了简要的介绍,并对时下流行的在线学习方式（包括在线语言学习教程、语言学习智能系统、语言学习游戏、移动语言学习和网络沟通五个方面）逐一进行了说明。  相似文献   

少数民族特困生现状与解决对策研究     

史丽宏  翟莉  韩旭 《沈阳教育学院学报》2013,(5):618-620

在分析民族特困生现状的基础上,阐述了做好民族特困生工作的必要性,并提出了具体解决对策,认为民族特困大学生作为高校的一个特殊群体,由于受民族、区域、经济和社会等方面因素的影响,有其自身的特点和现状,容易带来社会问题,甚至影响到民族地区的稳定和各民族的团结。因此,必须引起高度重视,并采取有效措施做好民族特困生的扶助工作。  相似文献   

Stability of switching linear systems with switching signals driven by stochastic processes     

Alessandro N. Vargas  Constantin F. Caruntu  João Y. Ishihara 《Journal of The Franklin Institute》2019,356(1):31-41

This paper presents conditions to assure the exponential stability in probability for autonomous switching linear systems. The switching signal acting on the autonomous system produces intervals that follow independent, identically distributed stochastic processes—the stability then follows by verifying simple-to-check linear matrix inequalities.  相似文献   

政府引导基金投资对创业企业后续融资的影响机制研究          下载免费PDF全文

冯冰  杨敏利  郭立宏 《科研管理》2019,40(4):112-124

基于激励、认证、“良性循环”三个理论视角,研究政府引导基金投资对创业企业后续融资的影响机制。通过私募通数据库搜集数据构造匹配样本,研究结果表明：（1）为私人资本提供收益类补偿时,政府引导基金投资可以促进创业企业后续融资;然而,为私人资本提供亏损补偿加上收益类补偿,或采用市场化运作模式时,政府引导基金投资不能促进创业企业后续融资。（2）无论投资早期还是后期的创业企业,或者无论投资高科技行业还是非高科技行业的创业企业,政府引导基金投资都不能促进创业企业后续融资。（3）无论投资创投落后地区还是创投成熟地区的创业企业,政府引导基金投资都不能促进创业企业后续融资。上述结论支持激励假说,但不支持认证假说和“良性循环”假说,表明通过政府引导基金投资促进创业企业后续融资的关键在于为私人资本提供合适的补偿机制。  相似文献   

Evaluation of soccer players under the Moneyball concept     

Luiz Octávio Gavião  Annibal Parracho Sant’Anna  Gilson Brito Alves Lima  Pauli Adriano de Almada Garcia 《Journal of sports sciences》2020,38(11-12):1221-1247

ABSTRACT

The recruitment of athletes with limited resources is a global problem in professional sports. In US Major League Baseball, the experience of the Oakland Athletics’ general manager in the last decade turned his “Moneyball” model into a synonym of quantitative analysis in the transfer market of baseball players. His strategy focused on hiring players with outstanding technical skills but relatively low market value. This study adapted this model to the framework of a multiple criteria decision aid (MCDA), by selecting undervalued players who have complementary abilities. The novelty here refers to the joint use of four algorithms explored by the composition of probabilistic preferences (CPP) (i.e., ranking, classification, dynamic evaluation and regularity analysis) and their application to soccer player performance evaluation. The new model analysed the recent transfer of a left-back soccer player to Europe. The results indicated 12 opportunities for better investment, among 32 left and right-back players considered. Two years later, the value of the same player was considerably lower. He played only five matches in the 2018–2019 season, without scoring or providing any assists. On the other hand, the players better classified by the CPP-MB model presented higher performances and market values.  相似文献   

Online visibility of software-related web sites: The case of biomedical text mining tools     

Gael Pérez-Rodríguez  Martín Pérez-Pérez  Florentino Fdez-Riverola  Anália Lourenço 《Information processing & management》2019,56(3):565-583

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我国研究生教育快速发展中存在的问题与思考   总被引：5，自引：0，他引：5  

温凤媛  马立红 《辽宁教育研究》2006,(1):89-91

研究生教育在整个高等教育体系中的地位越来越重要,我国研究生教育呈现出持续的多样化发展的态势;研究生教育的不断发展也伴随一定问题;研究型大学应引领研究生教育,研究生教育将通过不断深化改革确保质量的提高。  相似文献   

新升本高校图书馆读者入馆人次变化特点研究——以安康学院图书馆为例     

朱礼红 《安康学院学报》2008,20(2):125-128

新升本高校按照本科条件配备了优质的图书资源,而生源结构中专科为主向本科为主逐渐过渡的现状,出现了本科图书资源与专科学生素质不相匹配的现象,图书馆的利用率比较低。学生入馆人次呈现时段上各年级依次递减趋势、时点上考试前人多而平时人少、随年级升高呈下降趋势、从阅读内容上看通俗读物人多而学术刊物关注人少等特点。因此,图书馆应从沟通引导、服务教学、资源调整等方面入手,以提高图书馆的利用率。  相似文献   

Cytocompatible cellulose nanofibers from invasive plant species Agave americana L. and Ricinus communis L.: a renewable green source of highly crystalline nanocellulose     

Evdokimova  Olga L.  Alves  Carla S.  Krsmanović Whiffen  Radenka M.  Ortega  Zaida  Tomás  Helena  Rodrigues  João 《Journal of Zhejiang University. Science. B》2021,22(6):450-461

In this study, the fibers of invasive species Agave americana L. and Ricinus communis L. were successfully used for the first time as new sources to produce cytocompatible and highly crystalline cellulose nanofibers. Cellulose nanofibers were obtained by two methods, based on either alkaline or acid hydrolysis. The morphology, chemical composition, and crystallinity of the obtained materials were characterized by scanning electron microscopy(SEM) together with energy-dispersive X-ray spectroscopy(EDX), dynamic light scattering(DLS), X-ray diffraction(XRD), and Fourier transform infrared(FTIR)spectroscopy. The crystallinity indexes(CIs) of the cellulose nanofibers extracted from A. americana and R. communis were very high(94.1% and 92.7%, respectively). Biological studies evaluating the cytotoxic effects of the prepared cellulose nanofibers on human embryonic kidney 293 T(HEK293 T) cells were also performed. The nanofibers obtained using the two different extraction methods were all shown to be cytocompatible in the concentration range assayed(i.e., 0-500 μg/mL). Our results showed that the nanocellulose extracted from A. americana and R. communis fibers has high potential as a new renewable green source of highly crystalline cellulose-based cytocompatible nanomaterials for biomedical applications.  相似文献   

含氧酸盐溶解性的定量标度     

梁永锋  刘立红 《宁夏师范学院学报》2008,29(3):101-103

本文通过对无机含氧酸盐溶解过程的分析,提出了判断无机含氧酸盐溶解性的依据,推导了无机含氧酸盐溶解性计算公式.  相似文献