A metadata approach to statistical query processing

Concerning the task of integrating census and survey data from different sources as it is carried out by supranational statistical agencies, a formal metadata approach is investigated which supports data integration and table processing simultaneously. To this end, a metadata model is devised such that statistical query processing is accomplished by means of symbolic reasoning on machine-readable, operative metadata. As in databases, statistical queries are stated as formal expressions specifying declaratively what the intended output is; the operations necessary to retrieve appropriate available source data and to aggregate source data into the requested macrodata are derived mechanically. Using simple mathematics, this paper focuses particularly on the metadata model devised to harmonize semantically related data sources as well as the table model providing the principal data structure of the proposed system. Only an outline of the general design of a statistical information system based on the proposed metadata model is given and the state of development is summarized briefly.     

贺知章撰许临墓志跋

唐代许临墓志 ,由知名文士贺知章撰文 ,书法亦隽雅。志主青年时期久在相王李旦府中任低职官员 ,相王登帝位 (睿宗 )后 ,擢为右武卫将军 ;在平灭太平公主、常元楷等发动的宫廷政变中立功 ,得玄宗嘉奖 ,出刺曹州 ,卒于任上。此志可以补正史无许临传记之缺佚 ,并为研究其文学作品和撰作技巧提供了新鲜材料     

中国企业员工福利状况分析

本文运用多元统计分析中的聚类分析法 ,对 2 0 0 0年各地区国有企业 ,集体企业 ,港、澳、台商投资企业以及外商投资企业在岗职工福利费用进行聚类分析 ,从而研究中国企业的员工福利状况 ,总结出员工福利分布特点和地区差异性     

VFP表单中图片动画效果设计

表单是VFP与人交互的桥梁，目前学生在设计、应用过程中，仅局限于书本中简单控件的使用，并没有较深入地与实际应用相结合．对此本文精选几例，分别从不同角度简单介绍了如何通过编程的手段来实现动画效果，本操作原理简单，容易实现．     

MULTIVARLYTE ANALYSIS OF CLUSTERED SURVEY DATA: TESTING EQUALITY OF COVARLANCE MATRICES

The problem of testing the hypothesis of equality of covariance matrices in the presence of two-stage sampling is considered. Asymptotic test procedures based on linearization, grouping and jackknifing with or without transformation are proposed. The finite sample properties of these procedures are investigated in sampling experiments both from simulated known distributions and from a natural population.     

矿井掘进工作面安全评价的灰色聚类方法

本文用灰色聚类方法[1]讨论了煤矿掘进工作面安全评价问题,提出了一种新的安全评价方法─灰色聚类综合法。同时,本文对灰色聚类的算法作了改进,改进后的算法便于记忆和应用。     

ERP沙盘模拟培训对大学生团队协作能力的培养

ERP沙盘在教学的过程中改变了传统的教学模式,使学生从被动的接受者,变为主动实施者,是一种全新的教学模式。在教学的过程中不但可以提高大学生的实践动手能力,最主要的是培养了大学生的团队协作精神。通过阐述ERP沙盘模拟教学的特点,对大学生团队协作能力的培养进行了有益的探讨。     

集群创新研究的方法论综述

集群创新体现了现代互动性创新的系统特点,是现代创新体系不可分割的一部分。从方法论的角度看,集群创新的相关研究主要运用了定性研究、案例分析、统计研究和社会网络分析等方法,对此本文从方法运用角度回顾了相关研究,并从研究问题、研究结果、管理涵义等方面对主要文献做了比较和评论,在此基础上总结了各研究方法的优缺点及适用性,以及未来方法综合运用的趋势,供相关研究借鉴参考。     

A Note on the Poisson Likelihood Ratio Test Statistic for Kulldorff's Scan Methods

Methods based on scan statistics are widely used in health-related applications to detect clusters of disease. The most common methods are based on the Bernoulli and Poisson models. Kulldorff (1997 Kulldorff , M. ( 1997 ). A spatial scan statistic . Communications in Statistics—Theory and Methods 26 : 1481 – 1496 .[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) derived the likelihood ratio test statistic for his scan method for both of these models. His scan statistic is widely used with freely available software, SaTScan^? (see Kulldorff, 2005 Kulldorff , M. ( 2005 ). SaTScan: software for the spatial, temporal, and space-time scan statistics , version 5.1 [computer program]. Information Management Services 2005; Available: http://www.satscan.org/. Accessed July 2007 . [Google Scholar]). We provide an alternative derivation of the likelihood ratio test statistic in the Poisson case. Our derivation is simpler and more general in the sense that it applies when the incidences are not aggregated into subregional counts.