Innovators and imitators: Organizational reference groups and adoption of organizational routines

Firms vary greatly in their rates of creating and adopting technological and organizational innovations, in part because of their choice of reference group. We argue that the selection of a reference group is a crucial and neglected source of firm heterogeneity. Comparisons to the average of other firms in a population cause most firms to adopt innovations once they are widely accepted. A distinctive feature of the minority of innovating firms that create innovations or adopt them early is that they compare themselves with, compete with, and try to differ from other innovating firms, whereas the majority of firms compare themselves with, and conform to, a broader group of firms. We elaborate this argument based on the behavioral theory of the firm and institutional theory, and test it on a two-period survey on adoptions of innovative organizational forms in Europe and the US. The analysis shows the predicted differences in the adoption patterns of innovating and imitating firms.     

中文科技文献的网络检索及其资源

简述科技文献检索工具的发展过程，分析网络检索的优势与制约因素，介绍因特网上大型中文科技文献数据库资源，并从检索应用的角度对它们进行了比较。     

在制约中彰显个性--主持人如何把握节目的语言表达方式

主持人在选择自己的语言表达方式时,既受节目类型和稿件体裁的制约,又受受众群体需求的制约.在满足客观的多重要求之后,不同的主持人在语言的表达方式上展现出来的是个性.而个性化的语言反过来又折射出主持人独具魅力的人格.     

医学院校科研绩效评价问题的探讨

分析了医学院校绩效评价的重要性和复杂性特点，基于系统分析的方法，探讨了科研绩效评价的内容、评价指标与评价原则，提出了科研绩效评价的创新管理措施，为医学高校进行科研绩效评价提供参考。     

水龙骨科新资料

 One new species of the genus Lepisorus (L. petiolatus Ching et Y. X. Lin) and one new record of the genus Colysis (C. membranacea (Bl.) Presl) arereported from Guangxi, China.     

基于系统动力学的企业技术创新网络形成机理研究

合作创新是企业提升技术创新能力的重要途径之一,技术创新网络能够有效推动企业参与合作创新,突破阻碍企业创新的瓶颈因素。文章从创新主体所从事的创新活动入手,在构建以企业为中心的技术创新网络路径框架的基础上,建立了驱动技术创新网络发展的系统动力学模型。同时,采用北京统计年鉴公布的中关村国家自主创新示范区企业数据,对模型进行模拟仿真,实验结果表明:仿真结果与现实数据相吻合,理论模型得到有效验证,并进一步运用VENSIM软件进行系统分析,得出企业技术创新网络形成机理。     

广东竹类新植物

Six new taxa of the Bambusoideae are described from Guangdong Pro- vince, China. They are Indosasa suavis W. T. Lin et Z. J. Feng, Phyllostachys purpureomaculata W. T. Lin et Z. J. Feng, Arundinaria quadrangula W. T. Lin et Z.  J.  Feng,  A.  pubiannula W.  T.  Lin et Z.  J.  Feng,  Gelidocalamus albopubescens W. T. Lin et Z. J. Feng, and Sasa duplicata W. T. Lin et Z. J.Feng.     

Application of a transversal laguerre network in adaptive equalization

Synchronous data transmission systems that transmit information over dispersive channels often employ adaptive equalization techniques in the processing of the received signals. Most equalizers presently used in communication systems are of the tapped delay line (TDL) type. In this paper, we propose a class of adaptive equalizers of which the TDL equalizer is a member. Another interesting member of this class is the Laguerre adaptive equalizer which is to be introduced in this paper. The configuration of the Laguerre equalizer is developed. It is found, as shown by the examples, that the Laguerre equalizer is more accurate, and is less sensitive to timing error than the conventional TDL equalizer.     

《中国计划生育学杂志》在计划生育科技创新中的作用

《中国计划生育学杂志》作为我国计划生育领域唯一综合指导类科技期刊，是计划生育／生殖健康科学研究和技术服务体系的重要组成部分。本文回顾总结了《中国计划生育学杂志》创刊以来始终坚持办刊宗旨，在促进计划生育科技创新与应用，推动我国以技术服务为重点的计划生育事业发展中所发挥的桥梁和纽带作用。同时也提出，面对新的历史时期我国人口和计划生育新问题、新任务，《中国计划生育学杂志》将在稳定低生育水平、统筹解决人口问题、促进人口全面协调发展，构建社会主义和谐社会进程中任重而道远。     

Transform domain technique for windowing the DCT and DST

In this paper, an algorithm is developed to apply Hann, Hamming, Blackman and related windows directly in the transform domain for the discrete cosine transform and discrete sine transform. These algorithms are useful in applications where windowing is required in order to minimize edge effects caused by implicit symmetries in the transform domain that are not replicated in the real-world data. Examples of such applications include data communication, adaptive system identification and filtering, real-time analysis of financial market data, etc. Software implementations in C language are also given.