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《Communication monographs》2012,79(4):367-385
This research examines assumptions underlying the employment of group means in communication research. The vector of outcomes of a group mean typically represents outcomes of different individuals rather than different outcomes of an individual. When the vector represents different individuals' outcomes, the sample mean can violate criteria of unbiasedness, consistency, and sufficiency. This research explores whether different individuals' outcomes should be treated as equivalent to different outcomes of individuals. Data analysis reveals that the necessary assumptions for sample means to well-represent differing individuals' outcomes are often violated in that consistency, sufficiency, and unbiasedness of the sample statistic are not maintained. Therefore, a sample mean cannot be assumed to be a “good” statistic when the response vector represents different individuals' outcomes versus different outcomes of an individual. The implications for communication research are noted. It is recommended that individuals be modeled distributionally and that each individual's estimates be understood in the context of his/her response distributions. 相似文献
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倪燕 《大学图书情报学刊》2013,31(4):75-78
文章采用模糊数学综合评判模型,以新生对入馆教育满意度为中心,通过问卷调查的形式,建立相应的评价指标体系,来测评高校图书馆新生人馆教育满意度,以期为入馆教育提供一种比较科学、可行的方法与模式. 相似文献
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《文物保护研究》2013,58(2):103-109
AbstractA prototype inspection system has been tested which makes use of electronic speckle pattern interferometry with computer image processing, for deformation and stress analysis and for the location and analysis of defects in museum objects. Two different examples have been chosen: a nineteenth-century oil painting on a wood panel and a seventeenth-century enamelled terracotta vase. The method can give quite accurate metrological information; it is also particularly promising for rapid qualitative analysis. 相似文献
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V. E. Pavlovskii V. V. Pavlovskii 《Scientific and Technical Information Processing》2016,43(5-6):306-314
We present a simulation of the behavior of a homogeneous group of robots in an environment with obstacles. The problems of 2D flight of robots to different target objects were considered. The questions of the mutual dependence between local control rules and global adaptive group behavior and the synthesis of group control were studied and an analysis of the controllability of the group targets in environment with obstacles was performed. The results of the simulation are presented and examples of the operation of the simulation program are given. 相似文献
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This paper presents a method for comparing the subject headings of Scopus and WoS classifiers that has been tested based on examples in the field of mathematical disciplines. Semantic relationships of subject headings are explored by using intelligent analysis of keyword and expression clustering. The results are presented in the form of a correspondence table for the subject headings of the classifiers. 相似文献
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该文根据作者今年6月在省级机关档案工作会议上的讲话摘录,文章总结了近年来我省省级机关档案工作的发展情况,提出了当前机关档案工作的主要任务和具体目标;要求省级机关各单位要乘《四川省档案工作规范化管理试行办法》实施的强劲东风.开创省嫒机关档案工作的新局面。 相似文献
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A. O. Erkimbaev V. Yu. Zitserman G. A. Kobzev M. S. Trakhtengerts 《Scientific and Technical Information Processing》2015,42(4):211-222
This paper presents a detailed analysis of a newly developed system for the identification of nanomaterials and nanostructures of an arbitrary nature. The system has been created as a result of the joint work of the Committee on Data for Science and Technology (CODATA) and the International Council for Science (ICSI). It is shown that at its core the developed system is an extended set of metadata that reflect the conceptual framework of a scientific discipline. Their features include a wide coverage of the sum of the properties and characteristics, as well as the possibility of adding new headings, i.e., support for the evolution of the conceptual scheme that meets the requirements of the subject field. Limitations in the possibilities of the representation of certain categories of nanomaterials, especially of macroscopic objects, are found. It is shown that it is possible to overcome them by the active use of existing ontologies in the field of materials science. 相似文献
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利用知识网格构建数字图书馆知识服务平台 总被引:20,自引:0,他引:20
网格是高性能计算机、数据资源、因特网三种技术的有机组合和发展,如何有效地发现和获取信息、知识是网格技术应用的关键问题。利用知识网格构建数字图书馆知识服务平台,有利于实现信息、知识的有效共享与服务的智能化,推动知识管理的革命。文章介绍了知识网格的概念及研究的核心问题,着重论述了知识网格在数字图书馆知识服务中的应用以及构建数字图书馆知识服务平台所面临的技术挑战。 相似文献
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本文主要论述如何用ASP在Internet网上实现对书目数据库的动态查询,并给出了相应的程序实例。 相似文献
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数学思维的教学,不仅仅是为了培养数学家,而是为所有人的未来发展打下基础;还在于培养人本质看问题的意识。更在于培养人的良好的思维习惯,形成良好的思维策略,增强人的反应能力。那么在教学上如何培养学生的思维能力?提高他们解题思路与方法?下面从几个不同角度展示思维灵活性的教学实践。 相似文献
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《Communication monographs》2012,79(4):273-276
While stylistic rhetorics of the Middle Ages and the Renaissance are relatively well‐known, the ancient Latin works on figures of speech and thought have not attracted much attention. This paper extends our knowledge of the stylistic movement by surveying the extant classical Latin texts exclusively devoted to rhetorical figures. The treatises of Rutilius Lupus, Aquila Romanus, Julius Rufinianus and of several anonymous authors are reviewed and the development of figurist doctrine from the first century B.C. to the fourth century A.D. is sketched. It is suggested that the classical manuals on figures of thought and speech were similar in both form and content to the stylistic rhetorics of later generations and that we should regard the stylistic pattern as a single tradition which persists from the Hellenistic era through the seventeenth century A.D. 相似文献
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Keshra Sangwal 《Journal of Informetrics》2013,7(1):36-49
The citation distribution of papers of selected individual authors was analyzed using five mathematical functions: power-law, stretched exponential, logarithmic, binomial and Langmuir-type. The former two functions have previously been proposed in the literature whereas the remaining three are novel and are derived following the concepts of growth kinetics of crystals in the presence of additives which act as inhibitors of growth. Analysis of the data of citation distribution of papers of the authors revealed that the value of the goodness-of-the-fit parameter R2 was the highest for the empirical binomial relation, it was high and comparable for stretched exponential and Langmuir-type functions, relatively low for power law but it was the lowest for the logarithmic function. In the Langmuir-type function a parameter K, defined as Langmuir constant, characterizing the citation behavior of the authors has been identified. Based on the Langmuir-type function an expression for cumulative citations L relating the extrapolated value of citations l0 corresponding to rank n = 0 for an author and his/her constant K and the number N of paper receiving citation l ≥ 1 is also proposed. 相似文献
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学科信息门户建设中深层网页资源采集的方法与策略 总被引:3,自引:2,他引:3
文章阐述了国内外学科信息门户建设现状、深层网页资源的概念和特点及学科信息门户网站收集深层网页资源的意义。作者提出采用人工采集、自动化采集、人机结合采集和用户推荐等四种深层网页资源的收集方法;采用网络导航、跨库检索平台和数据保存等方法加以整合,信息整合应遵循标准化、开放性、及时性和权威性四大原则;最后探讨了深层网页资源的收集、整合过程中可能涉及的法律问题和解决方案。 相似文献
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面向21世纪的图书馆学专业教学方法和教学手段的改革 总被引:3,自引:0,他引:3
图书馆学专业由于其本身很强的实践性、应用性和技术性,使其在教学方法和教学手段方面呈现出十分明显的时代特征。信息时代,传统的教学方法和教学手段已远远不能满足学生对新知识的需求,本报告从现有教学体系出发,提出了一系列可行的设想。 相似文献
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1932年1月28日晚11时10分,日本海军陆战队数十人占领了上海的天通庵车站,随后以车站为据点,分三路向闸北中国守军发起进攻,这就是著名的“一·二八”事件.它是继“九一八”事变之后,日军在华蓄意策划的另外一个影响深远的侵华事件.一时间,闸北、吴淞地区炮火连天,民不聊生. 相似文献
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Agustí Cerrillo-i-Martínez 《Government Information Quarterly》2011,28(2):188-199
Transparency is one of the main challenges for public administrations in the information society to bring the public administrations closer to citizens and finally, to improve their democratic legitimacy. The article focuses on new tools to regulate the diffusion of public sector information and it also contributes some elements which will improve it. This analysis will be done, firstly by examining the various regulations approved in Spain on the diffusion of public sector information through electronic means. In particular, the scope of the Spanish e-Government Act will be analyzed in relation to the diffusion of public sector information through electronic means. Finally, some landmarks will be proposed which can serve to guide the formulation of new regulations on the use of electronic means for diffusing public sector information not only by Spanish public authorities but also by other authorities who intend to pass a regulation in this field to improve transparency. 相似文献