老年妇女急性下腹疼痛性疾病的超声诊断价值

目的探讨超声对老年妇女急性下腹疼痛性疾病的诊断价值。方法对经手术及临床随访证实60例老年妇女急性下腹疼痛性疾病的超声诊断进行回顾性分析。结果60例老年妇女急性下腹疼痛性疾病最终诊断分别为:女性生殖系统疾病10例,超声诊断符合率为90%,泌尿系统疾病15例,超声诊断符合率为93.3%,消化系统疾病34例,超声诊断符合率为76.5%,左侧髂窝脓肿1例,超声诊断符合率为100%。结论超声对老年妇女急性下腹疼痛性疾病的诊断和鉴别诊断中起着重要的作用。     

产城协同度测评体系的构建及应用

产城协同发展是走新型城镇化道路,实现区域经济可持续、低成本发展的关键。产业与城市发展之间存在着非线性耦合关系,以此可构建产城协同度测评体系,体系由测量模型、指标体系、指标权重三部分构成。该测评体系可以在很大程度上量化反映出区域产城协同的状况,但测评效度还有待提高。以四川省攀枝花市为例,利用该体系实证测量表明,2004—2011年间,该市产业与城市的发展处于良好协同状态,产城相互支撑发展状况良好。     

一种基于74HC595产生舵机用多路PWM波的方法

利用MSP430和74HC595产生了类人机器人舵机用的48路PWM波,且仅需占用MSP430单片机的P5端口,为机器人的其他控制电路保留了足够的单片机I/O口.硬件电路的特色是采取每片74HC595的串行输入端并联在一起,虽然任意时刻每片74HC595的串行输入数据相同,但输入的串行数据是否会从并行输出端输出还取决于各自的锁存脉冲.软件算法则应用了分时复用思想,串行数据按8组分时输入,每组含6路数据.该电路及其软件算法也适用于51系列、AVR系列单片机,是中低速单片机控制多路舵机的有效方案.     

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.     

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。     

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.     

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.     

“新工科”背景下机器人工程专业的课程体系构建探讨

针对机器人工程专业的课程满足不了“新工科”的新产业、新技术人才培养的需求,探讨了以“新工科”为背景的课程体系构建。讨论了课程体系构建的思路与路径,得出了课程体系的框架,为适应“新工科”发展的机器人工程专业课程体系的建设提供了参考依据。     

Some subjective bayesian considerations in the selection of models

Some considerations relating to the post-data selection of models are discussed. These include some difficulties with orthodox theory, implementation of the likelihood principle, and Bayesian tests of hypotheses.