Merging data from multiple sources: pretest and shrinkage perspectives

In this article, we have developed asymptotic theory for the simultaneous estimation of the k means of arbitrary populations under the common mean hypothesis and further assuming that corresponding population variances are unknown and unequal. The unrestricted estimator, the Graybill-Deal-type restricted estimator, the preliminary test, and the Stein-type shrinkage estimators are suggested. A large sample test statistic is also proposed as a pretest for testing the common mean hypothesis. Under the sequence of local alternatives and squared error loss, we have compared the asymptotic properties of the estimators by means of asymptotic distributional quadratic bias and risk. Comprehensive Monte-Carlo simulation experiments were conducted to study the relative risk performance of the estimators with reference to the unrestricted estimator in finite samples. Two real-data examples are also furnished to illustrate the application of the suggested estimation strategies.     

An operative extension of the likelihood ratio test from fuzzy data

In the present paper we are going to extend the likelihood ratio test to the case in which the available experimental information involves fuzzy imprecision (more precisely, the observable events associated with the random experiment concerning the test may be characterized as fuzzy subsets of the sample space, as intended by Zadeh, 1965). In addition, we will approximate the immediate intractable extension, which is based on Zadeh’s probabilistic definition, by using the minimum inaccuracy principle of estimation from fuzzy data, that has been introduced in previous papers as an operative extension of the maximum likelihood method.     

上海与纽约黄金期货价格联动关系实证分析

为研究国内外期货黄金价格之间的关联性,对2011～ 2012年间的纽约期金日收盘价格和上海期金开盘价格进行协整检验、因果检验,建立误差修正模型,进行脉冲响应分析和方差分解研究.结果表明：上海黄金期货市场与纽约黄金期货市场价格之间存在长期均衡的关系.上海期货价格受到纽约期货市场价格的影响幅度更大,时间间隔更短.     

Global and multiple test procedures using ordered p-values—a review

This paper reviews global and multiple tests for the combination ofn hypotheses using the orderedp-values of then individual tests. In 1987, Röhmel and Streitberg presented a general method to construct global level α tests based on orderedp-values when there exists no prior knowledge regarding the joint distribution of the corresponding test statistics. In the case of independent test statistics, construction of global tests is available by means of recursive formulae presented by Bicher (1989), Kornatz (1994) and Finner and Roters (1994). Multiple test procedures can be developed by applying the closed test principle using these global tests as building blocks. Liu (1996) proposed representing closed tests by means of “critical matrices” which contain the critical values of the global tests. Within the framework of these theoretical concepts, well-known global tests and multiple test procedures are classified and the relationships between the different tests are characterised.     

谈高校英语专业口译测试的规范化设计

口译测试是检测考生口译能力并获取教学反馈信息的重要手段。本文分析了当前高校口译测试中存在的问题,并以交际测试理论为指导,对口译测试的原则、内容、题型和评分标准等问题进行了综合研究和探讨,在此基础上对高校口译测试的规范设计和合理实施提出了具体建议和方案。     

石灰改良盐渍土路基工程特性试验研究

滨海盐渍土作为一种特殊土,具有溶陷、盐胀、腐蚀等不良的工程特性,滨海地区盐渍土路基填料是制约交通建设快速发展的重大岩土工程问题之一。为了解决滨海盐渍土的工程应用,基于大量的室内试验,研究分析了石灰改良盐渍土路基填料的液塑限试验、击实试验、室内CBR试验和不同条件的不固结不排水三轴试验结果,从工程技术、降低造价和环境保护等方面对滨海高速公路路基填料改良利用的可行性进行了研究论证,为滨海地区盐渍土路基的修筑具有重要的指导意义。     

土地价格、房地产开发投资对房价影响的实证分析

针对土地价格、房地产开发投资对房价的影响,依据2000—2010年间的中国居住用途土地价格、房地产开发投资完成额和商品房价格的年度数据,运用协整检验和误差修正模型进行了实证研究。结果表明:我国的房地产价格与土地价格、房地产开发投资额之间存在长期稳定的均衡关系;土地价格是房价变动的促进因素,而房地产开发投资额变动对房价的影响更为显著。     

环首都贫困带农村贫困家庭识别及其特征

克服传统的贫困线的弊端,利用"环首都贫困带22县人口状况"调查数据,采用微观多维度层次分析法将贫困带家庭按照"贫困—富裕度"划分为5类:非常贫困户、有些贫困户、一般户、比较富裕户和非常富裕户。通过对5类家庭进行比较分析,揭示出贫困带贫困家庭老年人口贫困化、人力资本存量低、收入来源单一以及脆弱性突出等特征。     

紧贴行业的应用型人才培养模式之研究

广东白云学院在推进汽车检测与维修技术专业教学改革过程中,紧紧围绕汽车服务业的现状和特点,以行业人才需求为依据,确定专业培养目标和人才规格,以行业的岗位能力要求为出发点,构建高效、实用的培养方案,以服务于行业为目标,建立有行业参与的教学机制,在人才培养质量上取得了优异的成绩。     

尢智表的佛学科学分析

佛说缘生而主无常、无我、性空。佛教传入中国后,谈空说有,异说纷呈。近代佛学复兴,科学思潮适逢其会,以科学解空则应运而生。无论在形式上、方法上,还是在内容上,无论是宇宙生成论,还是社会人生观,处处用自然科学方法和科学成果印证佛教义理,为佛学提供实验的证据。尢智表便是其中之翘楚。