在应对入世后我国农业面临的挑战中分析测试技术和科学仪器担负的重任

本文概叙了入世后中国农业面临的农产品品质 安全性及价格的三重冲击和应采取的应对措施 着重分析了农产品安全问题和食品安全保障体系的构建 论述了分析测试技术和科学仪器的七项重任     

分布式室内移动机器人的定位与导航

针对当前移动机器人定位与导航成本较高的问题,提出了一种低成本、高性能的分布式导航方案。以性价比较 高的RPLIDAR激光传感器为核心,采用分布式软件的设计思想,设计了传感器的软件接口;采用DWA方法进行局部路 径规划。设计实现了移动机器人的定位与导航。实验结果表明该方案具有可行性与高效性。     

试谈测试回冲效应对外语课堂教学的启发

本文从教师角度回顾了国内外有关测试回冲效应的实证研究,阐释了测试回冲对英语教学之间的关系;帮助英语教师从多角度认识并进一步了解外语课堂教学中的测试,以求达到更好的课堂测试效果。     

A Path Analytic Model of a Theory of Quality Management Underlying the Deming Management Method: Preliminary Empirical Findings*

Despite the impact that Deming and his 14 Points have had on the practice of quality management, empirical support for the effectiveness of the Deming Management Method has not advanced beyond the presentation of anecdotal, case-study evidence. In part, this is because theory to guide the conduct of empirical research has not been available. Only recently has such a theory of quality management to describe and explain the effectiveness of the Deming Management Method been articulated in the literature. This paper continues the journey of theory development; it reports the results of an exploratory empirical analysis of an articulated theory of quality management underlying the Deming Management Method. The constructs in the proposed theory are operationalized using measurement statements developed by the World-Class Manufacturing research project team at the University of Minnesota and Iowa State University. Path analysis is applied to the World-Class Manufacturing project data to explore the empirical strength of relationships advanced in the theory. The path analytic results provide support for several of the proposed relationships in the theory, and more importantly, suggest a number of new relationships which have not heretofore been proposed.     

Multiple hypothesis tests based On conditional differences in means

Many hypothesis tests are univariate tests and cannot cope with multiple hypothesis without an auxiliary procedure as e. g. the Bonferroni-Holm-procedure. At the same time, there is an urgent need for testing multiple hypothesis due to the very simple existing methods as the Bonferroni-correction or the Bonferroni-Holm-procedure, which suffers from a very small local significance level to detect statistical inferences or the drawback that logical and statistical dependencies among the test statistics are not used, whereby its detection is NP-hard. In honour of this occasion, we present a multiple hypothesis test for i.i.d. random variables based on conditional differences in means, which is capable to cope with multiple hypothesis and does not suffer on such drawbacks as the Bonferroni-correction or the Bonferroni-Holm-procedure. Thereby, the computation time can be neglected.     

试卷分析系统的功能与实现

试卷分析是教学评估与考核的主要依据和内容,本文采用数理统计方法对试卷进行定量分析,提出了基于经典测量原理的试卷分析方法,并设计开发了相应的分析系统软件。     

Bootstrap approach to test the homogeneity of order restricted mean vectors when the covariance matrices are unknown

Testing homogeneity of multivariate normal mean vectors under an order restriction when the covariance matrices are unknown, arbitrary positive definite and unequal are considered. This problem of testing has been studied to some extent, for example, by Kulatunga and Sasabuchi (1984 Kulatunga, D. D. S., Sasabuchi, S. (1984). A test of homogeneity of mean vectors against multivariate isotonic alternatives. Mem Fac Sci, Kyushu Univ Ser A Mathemat 38:151–161. [Google Scholar]) when the covariance matrices are known and also Sasabuchi et al. (2003 Sasabuchi, S., Tanaka, K., Tsukamodo, T. (2003). Testing homogeneity of multivariate normal mean vectors under an order restriction when the covariance matrices are common but unknown. Annals of Statistics. 31(5):1517–1536.[Web of Science ®] , [Google Scholar]) and Sasabuchi (2007 Sasabuchi, S. (2007). More powerful tests for homogeneity of multivariate normal mean vectors under an order restriction. Sankhya 69(4):700–716. [Google Scholar]) when the covariance matrices are unknown but common. In this paper, a test statistic is proposed and because of the main advantage of the bootstrap test is that it avoids the derivation of the complex null distribution analytically, a bootstrap test statistic is derived and since the proposed test statistic is location invariance the bootstrap p-value defined logical and some steps are presented to estimate it. Our numerical studies via Monte Carlo simulation show that the proposed bootstrap test can correctly control the type I error rates. The power of the test for some of the p-dimensional normal distributions is computed by Monte Carlo simulation. Also, the null distribution of test statistic is estimated using kernel density. Finally, the bootstrap test is illustrated using a real data.     

上海机器人产业发展战略与对策

发展机器人产业对上海意义重大,上海机器人产业和技术发展的战略定位须着眼于上海的转型发展和自身的基础。为此,应加强战略引导和资源整合,制定上海机器人产业与技术整体规划和路线图;加强需求的政策引导,发挥本土市场的拉动作用,促进机器人在各领域的应用;吸引大型企业参加应用开发,培育龙头企业;支持中小型企业加速发展,在细分市场形成竞争优势;完善机器人产业园区,提高政策优惠力度;协调整合产、学、研、用和跨学科资源,建立以企业为中枢的研发体系,以促进产业集聚和创新行业。     

冰箱化霜温控开关温度特性全自动测试台

本文介绍了自行研制的冰箱化霜温控开关温度特性全自动测试合，它每次检测数可达１００只，工作槽温度场均匀性在±０．１℃以内，控温精度达±０２℃．文中对其设计原理、系统流程及控制系统等作了详细描述．     

An Empirical Likelihood Ratio Test for Normality

The empirical likelihood ratio (ELR) test for the problem of testing for normality is derived in this article. The sampling properties of the ELR test and four other commonly used tests are provided and analyzed using the Monte Carlo simulation technique. The power comparisons against a wide range of alternative distributions show that the ELR test is the most powerful of these tests in certain situations.