Divergence-based estimation and testing with misclassified data

The well-known chi-squared goodness-of-fit test for a multinomial distribution is generally biased when the observations are subject to misclassification. In Pardo and Zografos (2000) the problem was considered using a double sampling scheme and ø-divergence test statistics. A new problem appears if the null hypothesis is not simple because it is necessary to give estimators for the unknown parameters. In this paper the minimum ø-divergence estimators are considered and some of their properties are established. The proposed ø-divergence test statistics are obtained by calculating ø-divergences between probability density functions and by replacing parameters by their minimum ø-divergence estimators in the derived expressions. Asymptotic distributions of the new test statistics are also obtained. The testing procedure is illustrated with an example.     

Factor analysis for ranked data with application to a job selection attitude survey

Summary.  Factor analysis is a powerful tool to identify the common characteristics among a set of variables that are measured on a continuous scale. In the context of factor analysis for non-continuous-type data, most applications are restricted to item response data only. We extend the factor model to accommodate ranked data. The Monte Carlo expectation–maximization algorithm is used for parameter estimation at which the E-step is implemented via the Gibbs sampler. An analysis based on both complete and incomplete ranked data (e.g. rank the top q out of k items) is considered. Estimation of the factor scores is also discussed. The method proposed is applied to analyse a set of incomplete ranked data that were obtained from a survey that was carried out in GuangZhou, a major city in mainland China, to investigate the factors affecting people's attitude towards choosing jobs.     

Low dose risk estimation via simultaneous statistical inferences

Summary.  The paper develops and studies simultaneous confidence bounds that are useful for making low dose inferences in quantitative risk analysis. Application is intended for risk assessment studies where human, animal or ecological data are used to set safe low dose levels of a toxic agent, but where study information is limited to high dose levels of the agent. Methods are derived for estimating simultaneous, one-sided, upper confidence limits on risk for end points measured on a continuous scale. From the simultaneous confidence bounds, lower confidence limits on the dose that is associated with a particular risk (often referred to as a bench-mark dose ) are calculated. An important feature of the simultaneous construction is that any inferences that are based on inverting the simultaneous confidence bounds apply automatically to inverse bounds on the bench-mark dose.     

高职教学实践计划之探索

高等职业教育的目标是培养具有职业定向性的技术型、技能型应用人才。因此 ,实践课的比重和效果在整个教学环节中应是一个重要因素。本文以经济秘书专业为例 ,提出了制定实践课实训计划的方法、步骤和要求。     

配合物ErI3.2CS（NH2）2.10H2O的制备及表征

本文根据０℃时碘化铒－硫脲（ＣＳ（ＮＨ２）２－水三元体系相平衡数据,确定了配合物ＥｒＩ３．２ＣＳ（ＮＨ２）２．１０Ｈ２Ｏ的制备方法,并对所得 进行化学分析、Ｘ－射线粉末衍射、红外光谱、差热分析,测定其密度,折光指数及轴性,确定配合物结构中的配位关系。     

沈阳城市色彩的规划与设计

一、城市色彩的含义及其规划设计作用“城市色彩”(Urban colour)这一用语诞生于20世纪60年代,对它的重视和研究是基于飞速发展的城市化进程带来的城市色彩混乱而展开的。初期对城市色彩的重视更多的是色彩本身,如单体建设的色彩等,而忽视了城市所构成的景观环境。目前对城市色     

完全检查下预防维修模型建立及案例分析

为了解决维修间隔期确定的难题,建立了维修间隔期和总停机时间之间关系的目标函数,以及时间延迟维修模型.根据故障记录数据和预防维修活动的检查数据,采用最大似然法估计有关缺陷发生率和时间延迟分布等参数.在所建立目标函数和估计参数的基础上,计算出最优的维修间隔期.     

Co-dependency and myth

Timmen Cernak’s use of Ovid’s mythological account of Narcissus and Echo as a classic case of co-dependence is critically analyzed against other interpretations. Simultaneous consideration is given to whether and to what extent the clinical concept of co-dependency has been confounded with the psychology of women in a male-oriented society. The complex and ambiguous symbolism of myth demands separation of myth from reality in describing the symptoms, etiology, and treatment of clinical co-dependence.     

体育教学中培养学生创新能力初探

体育教学作为学校教学中极为重要的方面及内容,有着其独特的鲜明特征。从教师素质、想象能力、创新意识和创新动力等方面进行深入分析与探讨,阐述了在体育教学中培养学生创新能力的策略、措施及方法。