Zone control charts with estimated parameters for detecting prespecified changes in linear profiles

ABSTRACT

In profile monitoring, control charts are proposed to detect unanticipated changes, and it is usually assumed that the in-control parameters are known. However, due to the characteristics of a system or process, the prespecified changes would appear in the process. Moreover, in most applications, the in-control parameters are usually unknown. To overcome these issues, we develop the zone control charts with estimated parameters to detect small shifts of these prespecified changes. The effects of estimation error have been investigated on the performance of the proposed charts. To account for the practitioner-to-practitioner variability, the expected average run length (ARL) and the standard deviation of the average run length (SDARL) is used as the performance metrics. Our results show that the estimation error results in the significant variation in the ARL distribution. Furthermore, in order to adequately reduce the variability, more phase I samples are required in terms of the SDARL metric than that in terms of the expected ARL metric. In addition, more observations on each sampled profile are suggested to improve the charts' performance, especially for small phase I sample sizes. Finally, an illustrative example is given to show the performance of the proposed zone control charts.     

Estimation of system reliability for exponential distributions based on L ranked set sampling

Abstract

In the case where strength and stress both follow exponential distributions, this paper considers the maximum likelihood estimator (MLE) of the system reliability based on L ranked set sampling (LRSS). The proposed MLE is shown to have existence, uniqueness and asymptotic normality, and its asymptotic variance is obtained by the Fisher information matrix of LRSS. The values of asymptotic relative efficiencies show that the proposed MLE is always more efficient than the MLE using simple random sampling (SRS). However, the MLE using LRSS cannot be written in closed form. Therefore, the modified MLE is proposed using the technique replaced some terms in the maximum likelihood equations by their expectations. The newly modified MLE using LRSS is shown to be superior to the MLE using SRS. Finally, the proposed method is applied to a real data set on metastatic renal carcinoma study.     

Psychometric validation of the PERMA-profiler as a well-being measure for student veterans

Abstract

Objective: The current study aims to validate the PERMA-Profiler, a well-known well-being measure, among a sample of student veterans. Participants: A sample of 205 student veterans were recruited from universities across the United States. Method: Cross-sectional research design was used in this study. Measurement structure of the PERMA-Profiler was evaluated using exploratory factor analysis (EFA). Convergent, divergent, and criterion-related validity was tested using Pearson correlation coefficients and Kruskal-Wallis test. Results: The EFA results yielded a two-factor solution for student veterans. Factors are named as emotional character strengths and performance character strengths. Conclusions: The PERMA-Profiler is a multidimensional scale with good reliability and acceptable levels of convergent, divergent, and criterion-related validity. The PERMA-Profiler can help researchers and practitioners better gauge well-being in student veterans. Implications will be discussed.     

小学英语教师评价理念和评价话语的相关性研究

评价话语是小学英语教师在形成性评价中落实以人为本、注重过程、促进发展评价理念的一种常见的评价方式。探究小学英语教师评价理念和评价话语的相关性对更新小学英语教师评价理念和提高评价话语的有效性有现实意义和参考价值。调查研究结果表明:小学英语教师对评价理念的把握和落实以及评价话语的使用处于一般水平;评价理念和评价话语在学历、教龄和执教学生人数上存在显著差异;学历、教龄与评价理念和评价话语存在显著的正相关,执教学生人数与评价理念和评价话语存在显著的负相关;学历和教龄对评价理念的把握和落实及评价话语的使用有显著的正向影响,执教学生人数不会对教师评价理念的把握和落实及评价话语的使用产生显著的影响。     

Dirk Geeraerts《认知语言学:基础读物》述评

对比利时鲁汶大学Dirk Geeraerts教授的《认知语言学:基础读物》做导读与述评,旨在与致力于认知语言学研究的各位同仁分享对此书的理解,以期为认知语言学经典理论进一步的研究与实践应用起到抛砖引玉的作用。     

隐名合伙与有限合伙比较研究——兼论其同时设立的必要性和合理性

隐名合伙与有限合伙均根源于康曼达契约。二者虽有相似之处 ,但却具有不同的制度价值。其共性在于均可用以解决有限责任合伙人的投资问题 ;不同之处则决定其分别具有不同的适用对象和制度安排。因此 ,二者均具有十分重要的制度价值 ,均应成为我国民事立法的模式选择     

浪漫的情怀 神秘的边地 率真的生命──沈从文创作对楚巫文化的承袭

沈从文是在湘西那块古老神奇的丰沃土地上成长起来的作家,他以其结构灵活、形式自由、感情色彩浓郁、文笔质朴清新、表现湘西边地风情的小说在中国现代文坛上独树一帜。以湘西这块特殊地域上源远流长的楚亚文化对沈从文的熏陶、影响,来探讨他作品中显示的那种浪漫的人性世界、独特的民情风俗以及雄健的民族生命元气与民族传统文化的关系,有助于理解沈从文小说的文化视野与审美倾向。     

崇文向学与尚武好斗——明清历修《赣州府志》对赣南民风的表达

民风是各类地方志都会涉及到的普遍话题.在明清历修<赣州府志>中,崇文向学与尚武好斗是两幅主要的民风图景,这两幅图景既是地方志作者对赣南民风已然世界的白描,也是对赣南民风应然世界的期待.地方志对民风描写及诠释的微妙变化,既映射出地方社会治乱环境的变迁,更标示着国家与地方、地方与地方、精英与民众以及土著与移民之间的诸多权力关系和利益诉求,具有多元话语的特征.正是这一特征,规限着地方志在对地方民风做某种程度客观呈现的同时,又要做符合特定利益关系的建构.     

The Asiatic Mode of Production in World History Perspective： From a Universal to a Particularistic View of History

关于马克思“亚细亚生产方式”的讨论,实质是普遍史观和特殊史观的关系问题。马克思立足于世界历史的视角,对亚细亚生产方式的思考和建构,经历了一个从普遍史观到特殊史观的过程;而从俄国革命所提供的“俄国道路”与“俄国方式”到斯大林的社会发展“五形态说”,恰恰经历了一个从特殊史观到普遍史观的回归。在建构中国史观的过程中,中国历史发展模式和现实发展经验、马克思社会形态理论和晚年东方社会思想以及俄国十月革命所开启的“俄国道路”和“体制嬗变”是三个不可或缺的重要元素。     

列宁的国家资本主义新论

关于无产阶级国家政权下的国家资本主义问题,在马克思恩格斯学说里还是个空白。俄国十月社会主义革命后,列宁创立了苏维埃政权下的国家资本主义理论,揭示了无产阶级国家政权下国家资本主义的本质、历史地位和运行方式。这个理论发展了马克思主义关于过渡时期的学说,开创了在经济文化落后、小农占优势的国家里利用资本主义,通过国家资本主义走向社会主义的先河。