期刊评价中的学科交叉度指标研究

在厘清期刊评价本质的基础上,指出当前期刊评价必须顺应学科交叉的时代潮流。确定期刊的学科交叉度应包含对外学科知识的吸收能力、对外学科的知识扩散能力、期刊载文的主题交叉程度和合作作者的多学科度4个指标,并给出相应的测度公式。     

制度环境影响企业的研发投入吗?

利用世界银行2005年对我国120个城市12 400家工业企业的调查数据,分析了企业所处地区的制度环境对当地企业研发活动的影响,结果发现:所处地区政府干预水平越低、产权保护水平越高、金融发展水平越高,企业越倾向于进行研发活动并提高研发投入强度。进一步的分析还发现,制度环境对不同所有制类型企业研发投入的影响存在显著差异。总体而言,同国有企业相比,政府干预水平的降低,产权保护水平和金融发展水平的提高对促进民营企业进行研发活动并加大研发投入的作用更加明显。     

Technology push and demand pull perspectives in innovation studies: Current findings and future research directions

This study updates the debate on the sources of innovation. Using techniques like factor analysis, multidimensional scaling, and pathfinder analysis, we examine the most influential articles that have dealt with the topic. Our analysis provides three main findings. The first more precisely highlights the role of demand as a source of innovation. The second illustrates how competences enable firms to match technology with demand and capitalize on technology and demand as sources of innovation. The third unveils a distinction between external and internal sources of innovations. The sources of innovation can be purely external or internally generated competences that enable the firm to integrate external knowledge within its boundaries. Our work contributes to the classic debate by providing a more granular understanding of how technology and demand interact. In discussing our findings, we link our framework to strategy, innovation and entrepreneurship studies that expressly call for a better understanding of technology and demand factors in value creation and capture.     

不同群体大学生亚健康现状比较分析及对策研究

目的:通过对不同群体大学生亚健康现状的调查和比较分析,得出结论,以促进高校大学生的身心健康。调查结果显示:大一的男生和大二的女生发生亚健康状况的比率在大学四个年级中是最高的;华中、东北地区的男生和华南地区的女生发生亚健康状况的比率明显高于其他地区;相对其他学科,医科学生亚健康情况更加严重。建议:应构建与落实新型健康教育课程体系,丰富健康教育的形式与内容;定期对学生健康检查时增加"亚健康"方面的筛检,针对不同群体学生采取群体和个体相结合的健康教育和预防干预措施;校方应努力创造适合学生身心特点的校园文化氛围,形成宽松有序的业余生活环境。同时大学生也应通过各种方式调节好心态,即便是在学业繁忙压力增加的情况下,也不能忽视体育锻炼;大学生除养成良好的锻炼、睡眠习惯外,还要养成良好的饮食习惯,特别要了解膳食营养与能量分配等方面的基本知识。     

军人高温高湿环境身心适应力训练初探

分析了高温高湿环境对军人生理及心理的影响,初步提出了几种军人高温高湿环境身心适应力的训练方法,并指出了训练中应注意的问题。     

开放大学网络课程资源建设模式的探讨

本文针对电大网络课程资源开发现状,结合多年资源开发实践,分析了传统开发模式,提出了开放大学网络课程资源建设采用项目制模式管理,以及提升网络课程开发质量和效率的建议,最后提出一种精简开发模式以供探讨。     

对冬训期间女子马拉松运动员膳食调查及营养补充的研究

以国家女子马拉松队运动员为研究对象,在备战2012年奥运会赛前的冬训期间,对运动员的膳食情况和营养补充进行了跟踪调查,找出了女子马拉松运动员对各种营养摄入不平衡的问题,并对运动员的营养补充和体力恢复及疲劳的消除等方面提出了建议,为保障队伍顺利完成大负荷训练,特别是高原训练和赛前调整提供了理论支持。     

Skilled migration and innovation in European industries

This paper studies the effects of skilled migration on innovation –proxied by patent citations- in European industries between 1994 and 2005, using the French and the UK Labour Force Surveys and the German Microcensus. Highly-educated migrants have a positive effect on innovation, but the effect differs across industries. It is stronger in industries with low levels of overeducation, high levels of FDIs and openness to trade and, finally, in industries with higher ethnic diversity. The aggregate effect of the skilled immigrant is about one third the one of the skilled natives. We tackle the endogeneity of migrants with a set of external and internal instruments.     

Asynchronous event-triggered observation and control of linear systems via impulsive observers

In this paper we investigate the observation and stabilization problems of a linear plant subject to network constraints and partial state knowledge, making use of the event-triggered technique. In order to address these problems, an impulsive observer is designed. Sufficient conditions are given to ensure a milder version of separation principle for linear systems controlled via an event-triggered controller. The proposed observer ensures practical state estimation, while the corresponding dynamic controller ensures practical stabilization. The sampling and the transmission of the output and the input are done asynchronously. The dynamic controller is tested in simulation on the linearized inverted pendulum.