基于递归概念图的文本检索模型研究     

吴保松  胡熠  陆汝占 《情报学报》2008,27(6)

Sowa在1984年提出了一个抽象模型,即概念图,作为基于语言学、心理学和哲学的知识表示语言.但是其概念图的定义比较简单,对于刻画文本中的语言组块的语义及语言单元之间的组合运算比较困难.为了能从形式上为将来的组块内部和组块之间的组合分析提供支持,深化概念图的表示形式,我们提出了一种适用于自然语言自动化分析的概念图的形式化描述,它可以看成是Sowa 概念图的递归扩展.然后我们将这种新颖的知识表示方式应用到文本检索领域的文本标引中,同时给出了以此为基础的概念图匹配算法.在和布尔检索的比较实验中,概念检索体现出比较明显的优势.  相似文献   

Supportive communication from bystanders of cyberbullying: indirect effects and interactions between source and message characteristics     

Andrew C. High  Rachel Young 《Journal of Applied Communication Research》2018,46(1):28-51

Cyberbullying is an increasingly common experience that produces psychosocial consequences for targets. Interventions encouraging bystanders to support targets of cyberbullying are limited by a lack of focus on what to communicate. This study considers supportive messages that emphasize emotional comfort, attributions of responsibility, and beliefs that people can change as relevant to this context, and it examines how perceptions of messages differ based on whether support providers have or lack experience with cyberbullying. We extend research on the indirect effects model of supportive communication by randomly assigning participants (N?=?304), who self-identify as targets of cyberbullying, to message and source conditions and assessing their perceptions of messages, providers, and outcomes. Impressions of messages mediate their influence on outcomes, and the experiential similarity of support providers moderates these effects. Certain messages, notably those contending that bullies can change, are less effective when delivered by sources who lack experience with bullying.  相似文献   

竞技武术套路运动员力量素质的训练措施分析     

安志超  何英 《中华武术(研究)》2020,(4):109-112

在现代竞技武术比赛中,超强的力量素质对创造优异的运动成绩起着重要作用。本文通过文献资料法、逻辑分析法等方法,针对竞技武术套路的运动特点指导和制定科学合理的力量素质训练方法,旨在使竞技武术套路训练走向更加科学化和规范化的道路,以期促进我国武术事业的发展。  相似文献   

Identification of temporal factors related to shot performance for indoor recurve archery     

Andrew J. Callaway  Johanna Wiedlack  Mario Heller 《Journal of sports sciences》2017,35(12):1142-1147

The purpose of this study was to investigate the temporal phases of the archery shot cycle that distinguish the arrows distance from centre, in an attempt to understand critical factors that affect performance. Fifteen archers of varying ability each performed 30 shots at 18 m. Fourteen potential predictor variables were measured for statistical modelling by stepwise multiple linear regression. The results show that pre-shot time (pre-performance routine), follow-through time (post-performance routine), aiming time, speed of the arrow and the %variation in clicker-release time, account for 7.7% of the variation in predicting shot performance. The results have implications for practice demonstrating factors that coaches should focus on to develop their athletes. Further work on pre-, but more importantly, post-performance routines are needed generally within sport research as they are lacking and have been shown to be important contributing factors in a number of sports.  相似文献   

网络服务提供者的著作权间接侵权责任探析     

黄萱 《北京工业职业技术学院学报》2019,18(3):123-126

随着互联网的发展,信息资源得以迅捷、广泛传播的同时,网络领域的著作权侵权纠纷也随之增多。这些纠纷的产生大多与网络服务提供者有关,由其承担相应责任亦是必然。分析网络服务提供者间接侵权责任法律规制的不足,如相关立法体系不完善、责任承担的主体不明确、过错的认定不清、责任承担方式模糊,提出健全相关立法体系、明确责任承担的主体、明确过错认定准则、梳理责任承担方式等建议,从而更好维护著作权人的利益。  相似文献   

论日语的被动态     

高红 《湖州师范学院学报》2005,27(6):48-51

由于日语与中文的语法结构截然不同，因此在学习日语的被动态时，很多初学者在日语的主语与对象语的处理上往往容易混淆。要想熟练掌握日语的被动态用法，首先要了解被动态的形态、句式和语义的特征，并对被动态用法的若干类型以及被动态的一般倾向要十分熟悉明了。  相似文献   

也论"片面共犯"     

冯凡英 《安阳师范学院学报》2007,(4):58-61

关于所谓的"片面共犯",国内外刑法理论和实践存在激烈争议。基于"犯罪共同说"的立场和我国大陆刑事立法,不能承认"片面共犯"。所谓"片面的共同正犯"是直接正犯与间接正犯的竞合;其他种类的"片面共犯"实质上是间接正犯。  相似文献   

Calculating the power of alternative choices by school leaders for improving student achievement     

Jingping Sun  Kenneth Leithwood 《School Leadership & Management》2017,37(1-2):80-93

This paper addresses a wicked problem faced by leaders wanting to be evidence informed in their choices of school improvement priorities and the most productive leadership practices to enact in pursuing those priorities. While local contexts will always be central to these choices, results of research ought to provide useful points of departure. But determining what relevant evidence recommends, local context aside, is far more difficult that the admonition to be ‘evidence informed’ seems to imply and the research community has offered few systematic solutions to the problem. This paper offers one possible solution, the calculation of ‘Power Indices’ using, for the purposes of illustration, evidence about the effects of a selected set of potential school improvement priorities (teachers’ emotions) on student learning, in combination with evidence about the effects on teacher emotions of a selected set of transformational leadership practices. Results argue for the value of a unique line of future research enabling school leaders to make choices about both school improvement priorities and how they might best pursue those priorities that systematically reflect the results of relevant evidence.  相似文献   

NTM方法在非线性贝叶斯动态模型中的应用     

高汝召  边平勇  赵衍才 《周口师范学院学报》2007,24(5):37-39

将NTM方法应用于非线性贝叶斯动态模型，给出了它的递推公式以及随机变量的数字特征的计算，与蒙特卡洛方法相比提高了效率和精度.  相似文献   

N阶k正则图的递归生成     

周学文 《内江师范学院学报》2006,21(6):22-24

研究了任意N阶k正则简单图的生成法则,提出了由简单完全图递归生成任意N阶k正则图的方法．  相似文献