Applications of quadrivariate exponential distribution to a three-unit warm standby system with dependent structure

Two-unit warm standby systems have been elaborately dealt within the literature. However, the study of standby systems with more than two units, though very relevant in state-of-the-art practical situations, has received little attention because of mathematical intricacies involved in analyzing them. Also, such systems have been studied assuming: (i) the lifetime or repair time of the units to be exponential, or (ii) the lifetime and repair time to be independent. The present contribution is an improvement in the state-of-the-art in the sense that three-unit warm standby system with dependent structure is shown to be capable of comprehensive analysis.     

基于学分绩点与综合素质测评的换算模型建立

学生综合素质测评体系的完善对有效实施大学生综合素质测评工作以及指导大学生健康发展有重要意义,其中,学生综合素质测评体系的关键在于学分绩点与综合素质测评的换算模型的转化。通过分析高校现行学分绩点测评公式,发现其存在的主要缺陷是转化公式不满足统计学原理,并指出学分绩点测评的换算公式应建立在对特定学生群体特征参数群数值分析的基础上。以西南石油大学某专业学生某学年的成绩分布数据进行验证,采取统计原理、常数变异法和不动点原理进行建模,利用求导方法对学分绩点测评中的特征参数群进行层次划分,然后对每段划分积分,通过归一化来确定变异项,得出新的换算模型。结果表明新模型能更好地反映学生的学习成绩在综合素质测评中的地位。     

Unruly Voices in the Museum

ABSTRACT

This article addresses the use of audio recordings and oral memory for the critical engagement with colonial pasts in ethnographic museums by focusing on the traveling exhibition What We See, curated by Anette Hoffmann (2009). Specifically, it draws on Jeffrey Feldman's notion of colonial “contact points,” i.e. material traces of colonial encounter, to highlight the exhibition's ability to convey and critique the sensory experience of colonial contact. In What We See, this colonial contact consisted in an anthropometric project conducted in South-West Africa, today's Namibia, in 1931, resulting in an archive of anthropometric measurements and photographs, life-casts, and phonographic recordings. The exhibition proposed an innovative way of reworking this archive by staging an intricate interplay between sound and sight, thereby disrupting conventional ocularcentric forms of display. However, this multisensory approach provoked highly divergent reactions at its various exhibition venues. This article argues that the divergent reactions in Cape Town, South Africa, and Vienna, Austria, were due to different levels of what Ann Stoler describes as “colonial aphasia”—that is the context-dependent difficulty of addressing disquieting colonial pasts and its sensory dimensions.     

Establishing Laws and Policies on Parent to Child Violence in Finland 1965–1983

This study explores perceptions of parent to child violence, the arguments for imposing legal regulation, and the intended objectives of the legislative process that led to a ban in Finland in 1983. This qualitative policy analysis examines policy documents alongside expert interviews with professional on the legislative process. The example of Finland shows that a significant change in attitudes and decreased levels of violence towards children can be achieved without the threat of legal punishment, even without specific intervention policies. However, the study emphasises the importance of establishing clear practices alongside altering legislation which has been inadequate in Finland.     

Bayesian Treatment of Model Uncertainty for Partially Applicable Models

This article discusses how analyst's or expert's beliefs on the credibility and quality of models can be assessed and incorporated into the uncertainty assessment of an unknown of interest. The proposed methodology is a specialization of the Bayesian framework for the assessment of model uncertainty presented in an earlier paper. This formalism treats models as sources of information in assessing the uncertainty of an unknown, and it allows the use of predictions from multiple models as well as experimental validation data about the models’ performances. In this article, the methodology is extended to incorporate additional types of information about the model, namely, subjective information in terms of credibility of the model and its applicability when it is used outside its intended domain of application. An example in the context of fire risk modeling is also provided.     

On the construction of optimal experimental designs: a penalty approach

Tn optimal experimental design theory there are well-known situations, in which additional constraints are implied to the design set. These constraints destroy in general the simplex structure of the set of feasible points of the design set. Thus the available iteration procedures for the unrestricted case are no longer applicable.

In this paper a penalty approach is suggested which transforms the restricted problem to the unrestricted case and allows the application of well-known algorithms such as the Fedorov-Wynn-type or the projected gradient procedure.     

关于三分Cantor集的结构的一些新结论

旨在采用代数的方法来研究三分Cantor集的结构特点。主要结果除了给出三分Cantor集的代数构造外还定义了仿四进位；结合代数构造、拓扑构造以及仿四进位分别给出并证明了三分Cantor集及其余集的结构公式，从而改进了已有的结论。     

Fat Monica,Fat Suits,and Friends

This paper examines narratives about fatness that are represented and reproduced by the character of “Fat Monica” played by Courteney Cox in a fat suit on the sitcom Friends. By drawing on David T. Mitchell's framework for analyzing “narrative prosthesis,” I examine how Fat Monica's narratives on Friends represent complex intersections of identities. I argue that fat suits often evoke fatness to support limited and clichéd narratives; however, fat suits may also enable new means of representing and understanding fatness. Through an analysis of the ways in which Fat Monica is represented in the episodes she appears in, three key uses of Fat Monica's fatness are discussed. Firstly, I examine the comic uses of Fat Monica and their relationship between fatness and humour. Next, I examine how Fat Monica storylines represent interlocking narratives of fatness, femininity, and sexual desire. Lastly, I consider how Fat Monica represents the construction of the normative body and claims about fatness and authenticity. Ultimately, Fat Monica illustrates how fatness relates to understandings of humour, gender, social class, and heterosexuality.     

关于留数定理的一个推广

研究了留数定理的有关问题,通过举例论证和归纳推理等证明方法,得到了单个留数定理的一个推广结论,最后将此结论应用于一些积分问题中.     

写作表述的三级范式

写作表述在文句、层次和篇章等三个层级上都有一定的范式。表述范式在不同基本文体的层次范式之间、篇章范式之间,以及篇章范式和层次范式之间,虽然各有不同,但也有共同之处。这些表述范式分别都是其同类相仿的写作表述模式构造,能为写作者实施写作表述提供可以借鉴的基本经验。