Graphical methods for comparing confounding in two or more designs

In many circumstances it is necessary to design an experiment with partial confounding of parameter estimates. In this situation, one would like to have tools to assess and compare candidate designs graphically. In this paper we discuss two graphical representations of design properties, and illustrate their application with two examples.     

Experimental designs and their efficiencies for spatially correlated observations in two dimensions

Optimality of experimental designs for spatially correlated observations is investigated.come two dimensional correlation structures are discussed and an attempt has been made to find optimal or nearly optimal design for each sitution.The solution lend to designs similar to that used for repeated measurements.The relative efficiency of the proposed designs in comparison to randomized latin square designs is tabulated for some cases.     

测试技术课程改革与实践

测试技术属于边缘科学,起点高、知识面广、难度大,不仅学科跨度大,涉及机、电、液、光、声、数学及自动控制等几方面,而且该课程实践性很强,实践环节在整个教学过程中占有相当大的比重,因而教与学均存在一定的困难。文章在分析传统教学存在问题的基础上,提出新的教学方法,调整教学内容顺序,突出教学重点,运用工程实例教学法,强化学生的实验训练。     

计算机文化基础实验课网络教学的实证研究

针对传统的计算机文化基础实验教学存在着教学模式单一,师生、生生之间的互动交流少,学生的积极性不高,课时量不足等问题,在分析计算机文化基础实验教学研究现状的基础上,研究利用天空教室来开展计算机文化基础实验课网络教学,开展了教学实验。研究结果表明,利用网络平台开展计算机文化基础实验课教学,具有传统教学无法比拟的优势,利用此网络平台开展计算机文化基础实验教学,有助于提高大学生的计算机操作技能和信息素养。     

Competence and consent to research: A critique of the recommendations of the national bioethics advisory commission*

Concern about the participation of incompetent subjects in psychiatric research has grown in the last several years. In response, the National Bioethics Advisory Commission (NBAC) recommended in its recent report that all investigations involving persons with mental disorders that may be associated with cognitive impairment that may pose greater than minimal risk to subjects utilize independent assessors to verify the capacities of subjects prior to entry into the study. This recommendation poses several problems for the conduct of research and the protection of research subjects. First, it fails to target that group of subjects most likely to be at risk for incapacity. Second, it focuses on too broad a range of research projects, many of which pose little risk to participants. The substantial costs of this approach are therefore not likely to be outweighed by concomitant benefits. In place of the NBAC recommendation, the author proposes a more flexible system of capacity assessment, designed to balance the costs with a greater likelihood of achieving meaningful protection for research subjects with mental disorders.     

Taguchi methods: linear graphs of high resolution

An important reason behind the success of the Taguchi methodology in qual- ity assurance has been the use of statistical methods, presented in a way that is accessible to the nonexpert user. Among the tools used to simplify the sta- tistical design of experiments has been the linear graph, apparently introduced by Taguchi. However, he did not consider the resolution of the corresponding designs (the higher the resolution, the more accurate the conclusions). For example, it will be shown that half of the linear graphs given by Taguchi for the L₁₆(2¹⁵) orthogonal array correspond to designs of resolution III, when designs of resolution IV are available (with the same lines in the linear graphs but with different assignments to the columns of the orthogonal array). A nontraditional but very straightforward method is presented for obtaining the alias chains and the linear graphs corresponding to an orthogonal array. The procedure can be easily understood and employed by nonstatisticians to find an experimental design of the highest possible resolution. The design can be used to obtain products or processes that are robust to variation.     

四个崭新的理论命题--论党的第三代中央领导集体对邓小平精神文明建设理论的新发展

党的第三代中央领导集体所标揭的四个崭新的理论命题,即文化是综合国力的重要标志;以人为本,重在素质;以立为本,重在建设;弘扬主旋律,提倡多样化,是对邓小平社会主义精神文明建设理论的新发展新贡献,不仅语言是新的,而且思维也是新的,典型地体现了党的第三代中央领导集体的理论创新品格。     

我国高考科目及内容设置的三大依据

本文认为, 高考科目与内容设置应依据三个基本方面: 有利于高校选拔人才, 有利于促进中学素质教育, 有利于扩大高校办学自主权。本文就此问题进行了讨论, 试图为我国高考科目政策提供相应的理论参考框架     

马致远散曲艺术别论

马致远是元代散曲重要的代表作家,综观近年对来其散曲方面的研究,论者多局限于“诗情”、“画意”、“意境”等艺术特征的分析,本文从“就近取物的设境”、“方位切换的视角”、“重趣的场景追求”这三个被人忽略的细微艺术特征切入,再次探讨马致远的散曲艺术,感受其散曲无限的魅力。     

从里尔克的《豹》看抒情主体的结构

在抒情诗中,潜在于诗句之外的第一人称主体不止一个,"抒情主体"也不仅仅要么是对"诗人",要么是对诗歌世界中的某个对象性"人物"的指涉。以《豹》为个案对抒情主体进行的结构分析提示,诗歌中有多个潜在主体的代换。