浅论人大《复印报刊资料》的特点与开发利用

文章论述了人大《复印报刊资料》的特点及其开发利用的现实意义和具体措施．     

网络信息资源的特点及其检索技巧

本文通过对网络信息资源特点的分析 ,阐明了网络信息检索的方法和技巧。     

农业科技期刊在科技传播中的地位、作用及创新

中国农业科技期刊的发展远远落后于中国农业科技的发展，且期刊的时效性差、信息量少，定位也不太准，质量堪忧。农业科技期刊的地位和作用，主要在它是农业科技成果的记录，是农业科学技术的信息源和转化为生产力的媒介，同时也是学术交流的工具和培养专门人才的大学。农业期刊的创新可从现代运作观念、组织机制、科学的方案等方面入手。     

Bayesian binary segmentation procedure for detecting streakiness in sports

Summary.  When an individual player or team enjoys periods of good form, and when these occur, is a widely observed phenomenon typically called 'streakiness'. It is interesting to assess which team is a streaky team, or who is a streaky player in sports. Such competitors might have a large number of successes during some periods and few or no successes during other periods. Thus, their success rate is not constant over time. We provide a Bayesian binary segmentation procedure for locating changepoints and the associated success rates simultaneously for these competitors. The procedure is based on a series of nested hypothesis tests each using the Bayes factor or the Bayesian information criterion. At each stage, we only need to compare a model with one changepoint with a model based on a constant success rate. Thus, the method circumvents the computational complexity that we would normally face in problems with an unknown number of changepoints. We apply the procedure to data corresponding to sports teams and players from basketball, golf and baseball.     

艺术与数字技术相结合的新媒体艺术设计

新媒体艺术设计是信息技术快速发展和艺术相结合的产物,对其形式特征、美学理论和知识结构的研究是这个学科发展的重要环节。为了解决新媒体艺术设计面临的学科基础理论薄弱,产业发展瓶颈等问题,通过调研相关产业,分析最新的前沿研究成果,并结合长期实践,得出新媒体艺术设计只有解决好学科的传承与创新,以及人才的培养平台才能得到高效快速的发展。     

当前世界发展动态对思想政治工作的影响及其对策

当前世界发生着广泛而深刻的变化 ,世界发展呈现全球一体化、多样化、市场化、信息化以及科学技术突飞猛进等趋势 ,而这些发展的最新动态 ,必然会影响人们的思想、观念和意识 ,从而影响我们党的思想政治工作。因此 ,在错综复杂的社会环境之中如何正确把握当前世界发展趋势 ,如何改进和加强党的思想政治工作 ,就显得尤为重要     

The interpretation of maximum-likelihood estimation

Maximum-likelihood estimation is interpreted as a procedure for generating approximate pivotal quantities, that is, functions u(X;θ) of the data X and parameter θ that have distributions not involving θ. Further, these pivotals should be efficient in the sense of reproducing approximately the likelihood function of θ based on X, and they should be approximately linear in θ. To this end the effect of replacing θ by a parameter ϕ = ϕ(θ) is examined. The relationship of maximum-likelihood estimation interpreted in this way to conditional inference is discussed. Examples illustrating this use of maximum-likelihood estimation on small samples are given.     

工业工程专业"管理信息系统"课程设计的几点探索

面向企业的工业工程专业学生在"管理信息系统"(简称MIS)课程设计的过程中,由于时间和条件所限,无法真正到企业调研并解决企业信息化课题.因此,如何在课程设计的题目设计,需求分析、系统开发及项目管理等环节充分模拟企业环境,使学生充分了解企业信息化的相关问题,将显得尤为重要.文章旨在就以上方面进行了一些探索.     

Information in experiments and sufficiency

We define measures of information contained in an experiment which are by-products of the parametric measures of Fisher, Vajda, Mathai and Boekee and the non-parametric measures of Bhattacharyya, Rényi, Matusita, Kagan and Csiszár. We use these measures to compare sufficient experiments according to Blackwell's definition. In particular, we prove that if δ_X and δ_Y are two experiments and δ_X≥δ_Y then l_X≥l_y for all of the above measures.     

On the nonexistence of Blackwell's theorem-type results with general preference relations

A well-known theorem of Blackwell states that, when quantity of information is properly defined, every expected utility decision maker prefers more information to less; for more general preferences, however, the theorem is no longer true. In this article, we investigate the extent to which Blackwell's Theorem does not hold and describe conditions, and situations, under which information is still valuable. We also show that, for many types of additions of information, there exists a decision maker who will reject this information.We thank Niv Ahituv, Larry Epstein, Uzi Segal, and an anonymous referee for their helpful comments. This article was partially financed by the Israel Institute of Business Research.