基于语义概念和词共现的微博主题词提取研究

【目的/意义】从海量微博信息中提取准确的主题词,以期为政府和企业进行舆情分析提供有价值的参考。 【方法/过程】通过分析传统微博主题词提取方法的特点及不足,提出了基于语义概念和词共现的微博主题词提取 方法,该方法利用文本扩充策略将微博从短文本扩充为较长文本,借助于语义词典对微博文本中的词汇进行语义 概念扩展,结合微博文本结构特点分配词汇权重,再综合考虑词汇的共现度来提取微博主题词。【结果/结论】实验 结果表明本文提出的微博主题词提取算法优于传统方法,它能够有效提高微博主题词提取的性能。【创新/局限】利 用语义概念结合词共现思想进行微博主题词提取是一种新的探索,由于算法中的分词方法对个别网络新词切分可 能不合适,会对关键词提取准确性造成微小影响。     

经济型数控车床的对刀方法和技巧

通过对R2J50L系统经济型数控车床基本对刀方法的分析与研究,总结出了更换刀具及刀具磨损时的快速对刀方法,提高了加工效率。     

Playing with rules around routines: children making mealtimes meaningful and enjoyable

Children attending early childhood education and care centres spend a lot of time fitting in with institutional routines. This paper uses ethnographic methods and sociocultural activity theory to describe and analyse the processes whereby young children in an early childhood centre collectively created meaning and interest during potentially boring routine mealtimes. The research explores the relationship between rules and children's playful activity. Using their imaginations children negotiated and played with and within the rules around ‘eating‐together’ times. While physically constrained in chairs around tables children enjoyed the freedom of playing with word sounds and meanings. Children actively, collaboratively and at times subversively, created their peer community culture.     

刀具路径规划在数控铣削加工中的应用

比较了不同的切削模式和参数对数控铣削加工的影响.利用UG NX模拟了某型飞机加强角材冲压凹模的数控铣削加工过程,对生成的刀具轨迹路径进行了比较分析,得到了优化路径.     

科学发展观与高校体育发展新观念

本文应用科学发展观的理论,提出开展高校体育工作必须树立现代体育新的观念：青年体育教师首先要过科研关,树立以科研为先导的人才观;以科研促发展,凝炼学科方向,树立发展体育学科的科学观;调整、优化体育专业结构,树立面向社会需要的多元化体育专业的发展观;以＂精品课程＂建设为重点,树立现代课程的质量观;加强体育场馆的规划和建设,树立现代体育发展的机遇意识。     

锻炼行为和锻炼动机的跨理论研究

基于跨理论模型,采用对587名知识分子问卷调查数据,对不同锻炼行为阶段的人群的锻炼行为和锻炼动机进行了比较分析,结果表明:①处于坚持阶段的锻炼者每次锻炼时间最长、每周锻炼次数最多,行动阶段的锻炼者参与的体育锻炼项目数量最多;②随着锻炼行为阶段向前发展(前意向→意向→行动→坚持),锻炼频率呈现持续递增的趋势;③处于行动阶段的锻炼者锻炼动机最强;④在前意向→意向→行动的变化阶段,锻炼动机都呈现出增强的趋势,但在行动→坚持的变化阶段变化非常小,且有减弱的趋势,锻炼动机对锻炼行为阶段发展的推动作用主要表现在前3个阶段.     

浅析基本数学概念在电路理论教学中的运用

不论是在电路理论的教科书中或大多数教师的教学中,普遍比较重视物理概念的学习,但运用基本数学概念解释电路原理方面却做的不足。本文以若干电路概念为例,说明数学概念对解释电路基本概念与基本理论的意义,希望起到抛砖引玉的作用。     

Preparation time influences ankle and knee joint control during dynamic change of direction movements

The influence of preparation time on ankle joint biomechanics during highly dynamic movements is largely unknown. The aim of this study was to evaluate the impact of limited preparation time on ankle joint loading during highly dynamic run-and-cut movements. Thirteen male basketball players performed 45°-sidestep-cutting and 180°-turning manoeuvres in reaction to light signals which appeared during the approach run. Both movements were executed under (1) an easy condition, in which the light signal appeared very early, (2) a medium condition and (3) a hard condition with very little time to prepare the movements. Maximum ankle inversion angles, moments and velocities during ground contact, as well as EMG signals of three lower extremity muscles, were analysed. In 180°-turning movements, reduced preparation time led to significantly increased maximum ankle inversion velocities. Muscular activation levels, however, did not change. Increased inversion velocities, without accompanying changes in muscular activation, may have the potential to destabilise the ankle joint when less preparation time is available. This may result in a higher injury risk during turning movements and should therefore be considered in ankle injury research and the aetiology of ankle sprains.     

以五大发展理念引领体育强国建设

摘要：运用文献资料法,对以五大发展理念引领体育强国建设进行了系统研究发现：以习近平同志为核心的党中央站在中华民族伟大复兴和人类文明发展的历史高度,深刻阐明了以创新、协调、绿色、开放、共享五大发展理念引领我国体育强国建设的新思想和新战略。五大发展理念奠定体育强国建设的理论基础和历史方位、勾划体育强国建设的顶层设计与逻辑进程、彰显体育强国建设的中国担当和方法论启示、凝聚体育强国建设的中国力量、铸就体育强国建设的中国方案。以五大发展理念引领体育强国建设思想是对中国特色社会主义体育发展规律的新认识,丰富和发展了中国特色社会主义理论体系和马克思主义体育思想。研究以五大发展理念引领体育强国建设将深化对中国特色体育发展理念的认识,增强中国体育发展的道路自信。     

‘Second death’, or revival of the ‘third world’ in the context of neo‐liberal globalization

Abstract

This paper tries to analyze the historical change in the Third World in its emergent stage, in the authoritarian stage and in the current democratic stage and, thereafter, find a way to revive the Bandung spirit in the current globalization context. I define the Bandung spirit as one of a ‘non‐aligned self‐helped “organization against” the dominant powerful countries’; that is, spirit of ‘anti‐predominance’. This spirit has emerged on the base of such domestic orientation and realities as economic self‐reliance, nationally integrated political regime, convergence of the state and civil society around anti‐colonialism. However, according to intensification of the Cold War confrontation on the international level and its centrifugal influence, the early Third World changed to a ‘new’ authoritarian Third World. The Third World in this stage could be characterized by an exclusive authoritarian political regime, dependent‐developmentalist economic orientation and coercively repressed and mobilized, in the top‐down way, civil society. This authoritarian Third World began to be confronted with a strong struggle from the bottom for democratization. In order for democratization of the Third World to become its true revival in the context of globalization, the following tasks should be considered. First, the democratic Third World should be a great driving force for the institutionalization of the transnational public regulatory mechanism. Second, the democratic Third World countries try to go over a kind of ‘transformed’ dependent development strategy. Third, democratization should go along with recovery of political inclusiveness and openness of the state to civil society’s demands. Thereafter, I tried to construct globalist re‐interpretation of the Bandung, by way of conceptualizing the current globalization as imperial globalization, unlike the imperialist globalization which the historical Bandung wanted to confront. I argue that the Bandung spirit of collective self‐help organizations against the newly emerging dominant order should be revived in this worse imperial globalization context. In addition, I argue that a nationalist resistance is also one component of the multiple resistances in the current imperial globalization.