对称性在积分中的妙用

数学的对称美是解决数学难题的关键,同时也为数学研究提供了一种独特的方法.主要归纳总结了对称性在计算不同的积分中的妙用,使一些较复杂的计算变得简化,利用对称性计算积分也是一种非常重要的计算技巧.     

三网融合实验室管理平台的构建

阐述了三网融合实验室的动力环境监控系统、门禁管理系统、电源控制系统、实验室综合管理系统几个模块的建设,以建立模块化、流程化和信息化的融合实验室管理体系,提高通信专业实验室的教学质量、管理水平和服务水平,推进适应行业发展的三网融合实验管理平台的建设。     

信息平台:三网融合的产业制高点

三网融合最直观的影响是消融了传媒产业、信息技术产业和电子通信产业的边界,形成了一个"媒信通融合大产业",而三网融合最深远的影响则是竞争方式的改变和竞争焦点的转移。以开放、对等、协作、共享为特征的"平台模式"将成为融合产业中最具竞争力的发展模式,而"信息平台"这种新型产业组织形式将成为三网融合产业竞争中的制高点。     

“三网融合”环境下数字图书馆面临的机遇与发展策略

随着当今信息社会数字化、网络化的推进,三网融合已是大势所趋。文章介绍了三网融合的技术优势,阐述了三网融合给数字图书馆带来的机遇,探讨了三网融合背景下的数字图书馆发展策略。     

Efficiency,unused capacity and transmission power as indicators of the Triple Helix of university–industry–government relationships

In this paper, we show that an information source composed with n random variables may be split into 2ⁿ or 2ⁿ − 1 “states”; therefore, one could compute the maximum entropy of the source. We derive the efficiency and the unused capacity of an information source. We demonstrate that in more than two dimensions, the transmission's variability depends on the system configuration; thus, we determine the upper and the lower bounds to the mutual information and propose the transmission power as an indicator of the Triple Helix of university–industry–government relationships. The transmission power is defined as the fraction of the total ‘configurational information’ produced in a system; it appears like the efficiency of the transmission and may be interpreted as the strength of the variables dependency, the strength of the synergy between the system's variable or the strength of information flow within the system.     

The e-government research domain: A triple helix network analysis of collaboration at the regional,country, and institutional levels

This study introduces a hybrid approach (i.e., a social network analysis technique and triple helix indicators) to study certain aspects of the e-government (EG) domain that would otherwise remain hidden when using conventional analytic tools. Particularly, we provide network analysis of the EG research domain by focusing on the network collaboration between regions, nations and institutions. We collected and analyzed 1091 scholarly papers which were classified as being about “e-government” by the Web of Science database. The results indicate that hybrid method can be used to understand certain network-level structures and patterns in the EG domain which are beyond the scope of the predominantly-used systematic literature review (SLR) method. Particularly, the hybrid method is useful in understanding collaboration patterns between countries, institutions and regions in the EG domain, identifying key players by studying their network properties (i.e., degree centralities); and in understanding the pattern of relations among universities, industries, and government. The implications of these results in terms of research and practice, and study limitations are discussed.     

解析印度理工学院：三重螺旋的视角

印度理工学院在短短60年间,一举跃升为世界著名理工大学。三重螺旋概念的提出,为阐释印度理工学院的崛起提供了一个全新的理论视角。文章从三重螺旋的视角,按照人才培养、科学研究和社会服务三个维度,分别对印度理工学院人才培养下的培养目标、课程设置、教学特点;科学研究下的科研理念、科研合作、成果转化;社会服务下的服务理念、服务渠道和服务共赢进行考察,“大学一产业一政府”互惠互利的博弈模型为印度理工学院的发展提供了强大动力。     

当代男子三级跳远技术新发展

男子三级跳远是世界大赛正式比赛项目之一。近年来三级跳远成绩不断提高,这同三级跳远技术发生深刻变化相关很大。运用献资料综述法、归纳分析法对三级跳远的技术核心,进行了全面的对比分析,提出了要提高我国男子三级跳远水平应注意的问题。     

供应链企业间团队知识转化的演化模型

为提高企业间团队知识转化效率以及提升供应链整体竞争力,厘清供应链企业间合作团队知识转化的内涵和演化机理,基于供应链跨企业合作团队实际特点,改进、补充SECI模型和三螺旋模型,建立供应链企业间团队知识转化概念模型,分析供应链企业间团队知识转化过程的交互机制;根据复杂适应系统理论思想,运用多主体建模与仿真方法建立起供应链企业间团队知识转化演化模型,借助NetLogo仿真平台对知识转化的演化过程进行仿真实验。仿真实验结果表明,所建立的模型能有效反映供应链企业间团队知识转化的作用过程和演化机理,其中知识共享能力、知识吸收能力以及企业重视程度对知识转化效果具有显著影响;此外,改变各参与主体的属性水平会对仿真结果产生不同程度的影响。     

The effect of the triple helix system and habitat on regional entrepreneurship: Empirical evidence from the U.S.

The ‘triple helix’ of the university-industry-government relationship and habitat are accepted as important determinants of innovation and entrepreneurship. However, empirical explorations of the effects of these variables and their interrelationships on regional entrepreneurial activities are highly limited. To fill this gap, we investigate the effect of the triple helix system and habitat on birth and death rates of U.S. firms at the state level. As expected, we find that industrial R&D expenditure plays an important role in promoting regional firm birth. However, university and government R&D also generate a synergistic effect that indirectly influences regional firm birth rates. In addition, we find that the synergy between university and industrial R&D enhances the sustainability of firms, while the interactions between (1) university and government R&D and (2) government and industrial R&D are associated with an increase in firm death. Other factors linked to more favorable conditions for firm formation include higher educational attainment in a region, lower tax rate, and habitat factors affecting quality of life, such as lower housing prices and higher rates of health insurance coverage. In regions with high entrepreneurial activity, we find positive synergistic effects of the interactions between (1) university and government R&D and (2) university and industrial R&D on firm birth rate, suggesting that university R&D plays an important role as an ‘entrepreneurial mediator’ among the three spheres in the triple helix system. In low entrepreneurial regions, the only triple helix system factors significantly influencing firm birth rate were tax rate. This finding suggests that the independent and interdependent components of the triple helix system and habitat are less powerful in low entrepreneurial regions.