The Influence of Top Management Team Attention on Firm Innovation Behavior: The Moderating Effects of Managerial Discretion

在快速变化和竞争激烈的全球市场环境中，创新已经成为企业赖以生存和发展的基石，学术领域中的研究者和企业实践中的管理者也早已将创新视为企业竞争优势的核心来源。作为企业战略决策及行为的制定者，高管团队对企业创新具有重要影响，特别是高管团队的心理及认知特质是支持其做出创新决策并最终影响企业创新行为的思想指引。管理认知的主导过程模型强调了注意力在个体认知对企业决策及行为影响中的关键作用，引起学者们开始关注管理者注意力与企业创新之间的关系。 本文基于高层梯队理论，引入战略管理中时间和空间的概念，研究高管团队注意力对企业创新行为的影响机制，并着重考虑情境因素在其中发挥的独特作用，采用管理自由度作为调节变量...In the rapidly changing and highly competitive global market environment, innovation has become the bedrock of the firms’ survival and development, and the researchers in academia and managers in firms have also regarded innovation as a critical source of competitive advantages. The top management team, as the maker of firms’ strategic decisions and behaviors, has an essential impact on firm innov...学位：管理学硕士院系专业：管理学院_企业管理学号：1762014115121

中美高校大学生创业教育比较研究及启示——以美国圣地亚哥州立大学为例

高等院校根据自身特点开展大学生创业教育,既是高校人才培养的必然要求,也是顺应和引领国家经济与社会发展的必然趋势。美国高等学校的创业教育历史悠久、水平较高,在创业人才的教育培养方面有成熟模式与成功经验。通过聚焦美国圣地亚哥州立大学商学院拉文企业家中心,剖析其创业教育的制度、模式,系统比较中国高校与圣地亚哥州立大学创业教育的异同,以期为中国高校的创业教育发展提供参考。全国学校共青团研究课题“‘互联网’时代下的大学生创新创业战略和措施研究”(2015LX174

Neural basis of social concept representation and social semantic integration

社会概念的表征和整合是人们理解和思考社会信息的重要基础,其神经基础问题正逐渐成为新兴的研究热点。现有的脑影像和损伤研究证据较为一致地提示,社会概念表征主要依赖由双侧颞叶前部、颞顶联合区、背内侧前额叶、扣带回后部及邻近的楔前叶所组成的脑网络。新近的功能神经影像研究提示,上述脑区除支持社会概念表征外,也分别参与不同层次的社会概念整合。未来研究可以从社会概念表征的子维度、社会概念加工的子成分、社会概念加工的行为影响等方面继续深入和拓展。</p

ISOLATION OF SPERM CELLS FROM RICE POLLEN TUBES

精细胞的分离是植物生殖工程的一个重要组成部分,是目前被子植物有性生殖研究的一个活跃领域[1,2]。随着精细胞分离技术的完善和分离出精细胞的植物类型的增加,目前对精细胞的分子生物学研究已有一些进展,主要是精细胞特异蛋白的分离[3,4]和cDNA文库的构建以及一些精细胞特异基因的分离[5,6]。Isolation of sperm cells from higher plants is a basis for studying the mechanism of double fertilization. In this study, the isolation of rice sperm cells from pollen tube was conducted. When fresh pollen grains from nearly blooming flowers were put into a medium containing 20% sucrose, 10% polyethylene glycol 4500 (PEG 4500), 0.05% CaCl2, 0.01% boric acid, over 40% pollen grains germinated and formed a pollen tube. After pollen tubes were transformed into a broken solution containing 8% mannitol, the tubes broke and released tube cytoplasm including two sperm cells. However, both sperm cells were enrapt in the cytoplasm and could not be identified. When 0.5% cellulase and pectinase were added into the broken solution, two sperm cells were released from cytoplasm. Both sperm cells could be collected using micromanipulator. We also tried to isolate sperm cells using in vivo-in vitro method: styles were pollinated and pollen tubes were allowed to grow for 40 min in vivo. Then styles were cut near ovary and floated in the same medium above-mentioned for 1 h until tubes emerged from the cut end. The styles with pollen tube were transformed into the broken solution and released the content including two sperm cells.国家自然科学基金项目(No.30670126)资助