Symmetrical design for symmetrical global sensitivity analysis of model output

Symmetrical global sensitivity analysis (SGSA) can help practitioners focusing on the symmetrical terms of inputs whose uncertainties have an impact on the model output, which allows reducing the complexity of the model. However, there remains the challenging problem of finding an efficient method to get symmetrical global sensitivity indices (SGSI) when the functional form of the symmetrical terms is unknown, including numerical and non-parametric situations. In this study, we propose a novel sampling plan, called symmetrical design, for SGSA. As a preliminary experiment for model feature extracting, such plan offers the virtue of run-size economy due to its closure respective to the given group. Using the design, we give estimation methods of SGSI as well as their asymptotic properties respectively for numerical model and non-parametrical model directly by the model outputs, and further propose a significance test for SGSI in non-parametric situation. A case study for a benchmark of GSA and a real data analysis show the effectiveness of the proposed design.     

Sensitivity Analysis Using Risk Measures

In a quantitative model with uncertain inputs, the uncertainty of the output can be summarized by a risk measure. We propose a sensitivity analysis method based on derivatives of the output risk measure, in the direction of model inputs. This produces a global sensitivity measure, explicitly linking sensitivity and uncertainty analyses. We focus on the case of distortion risk measures, defined as weighted averages of output percentiles, and prove a representation of the sensitivity measure that can be evaluated on a Monte Carlo sample, as a weighted average of gradients over the input space. When the analytical model is unknown or hard to work with, nonparametric techniques are used for gradient estimation. This process is demonstrated through the example of a nonlinear insurance loss model. Furthermore, the proposed framework is extended in order to measure sensitivity to constant model parameters, uncertain statistical parameters, and random factors driving dependence between model inputs.     

跨文化意识的培养：问题与对策

在外语教学活动中，有效地培养学生的跨文化意识，增强学生的跨文化交际能力，既是教育工作者的历史使命，也是外语教学改革的一项重大课题。探索在外语教学中培养学生跨文化意识的主要途径，很有现实意义。     

Preschoolers' Attachment to Mother and Risk for Adjustment Problems in Kindergarten: Can Teachers Make a Difference?

Based on attachment theory, two aims were addressed. Firstly, we tested whether close teacher–child relationships may buffer children who are less securely attached to their mothers against negative outcomes, such as aggressive behavior. Secondly, our study evaluated whether teacher sensitivity may protect less securely attached children against forming less close relationships with their teachers. In a sample of 127 children, mother–child attachment was observed in preschool. In kindergarten, teacher sensitivity was observed, and teacher–child closeness and child aggressive behavior were rated by the teacher. Results of multilevel hierarchical regression analyses first showed that with high teacher–child closeness, less securely attached children are no longer at risk for more aggressive behavior. Secondly, it was found that with high teacher sensitivity, less securely attached children are no longer at risk for developing less close relationships with their teachers.     

Becoming cosmopolitan: encountering difference in a city of mobile labour

ABSTRACT

Many who move countries today do so for work, and labour mobility – both temporary and permanent – is the mechanism by which countless people (both movers and stayers) come into contact with cultural difference. The domain of mobile labour is thus an important context through which to consider the transformative possibilities of encounters with racial and cultural difference. Situated within debates on everyday multi-culture and vernacular cosmopolitanisms, this essay considers the question of intercultural encounter at work in relation to the layered histories of race and variegated citizenships of mobile labour in Singapore. Exploring the micro-nature of cosmopolitan practices, the paper considers under what labour conditions might an outward-looking cosmopolitan sensibility and a convivial openness to otherness emerge among migrant workers, as against a set of survival-based intercultural capacities. I reflect specifically upon two cases of ‘incongruous encounter’ in workplaces reliant on precariously employed migrant labour: a mainland Chinese man and a Filipina woman who, because of Singapore’s racialised system of work visas, find themselves working in South Asian restaurants in Singapore’s Little India. They both engage ‘cosmopolitan practices’, yet their sensibilities differ sharply. Their stories highlight how, in a place like Singapore, the ‘encounter’ needs to be understood within a regime of mobile labour, situated racial hierarchies, and a highly stratified system of work visas. I further suggest that situational factors such as the nature of work including its spatial and temporal qualities, the mixture of co-workers, and recognition relations with superiors all mattered in framing the affective atmospheres of encounter. In a context of forced encounter, I argue that learnt capacities to function and interact across difference should not necessarily be romanticised as a cosmopolitan sensibility.     

Symmetrical Design of Experiment in Global Sensitivity Analysis Based on ANOVA High-dimensional Model Representation

This article reviews symmetrical global sensitivity analysis based on the analysis of variance of high-dimensional model representation. To overcome the computational difficulties and explore the use of symmetrical design of experiment (SDOE), two methods are presented. If the form of the objective function f is known, we use SDOE to estimate the symmetrical global sensitivity indices instead of Monte Carlo or quasi-Monte Carlo simulation. Otherwise, we use the observed values of the experiment to do symmetrical global sensitivity analysis. These methods are easy to implement and can reduce the computational cost. An example is given by symmetrical design of experiment.     

Local influence diagnostics for incomplete overdispersed longitudinal counts

We develop local influence diagnostics to detect influential subjects when generalized linear mixed models are fitted to incomplete longitudinal overdispersed count data. The focus is on the influence stemming from the dropout model specification. In particular, the effect of small perturbations around an MAR specification are examined. The method is applied to data from a longitudinal clinical trial in epileptic patients. The effect on models allowing for overdispersion is contrasted with that on models that do not.     

面子理论及其局限性新探 ——基于盎格鲁中心主义思想的研究

布朗和列文森的面子理论一直被视为研究礼貌现象的经典理论,在语言学界影响极大;但面子理论的提出是基于英语语料,研究的也仅仅是英语文化的礼貌现象,因此该理论深受盎格鲁文化价值影响,带有浓厚的盎格鲁中心主义思想,不能全面解释其他文化中的礼貌现象。回顾了面子理论的精髓思想及其贡献,在学术界对该理论的批判性研究基础上,从跨文化交际及盎格鲁中心主义的角度,进一步探讨面子理论的局限性,并为该理论研究的发展思路和方向提出诸多新的思考。     

论诗歌的再生--兼论翻译过程中影响跨文化交流的动态因素

文章以功能翻译理论为基础,以中国古典诗歌、日本诗歌、英美现代意象主义诗歌和中国早期白话诗之间的传承影响为例,论证了原语诗歌是通过翻译过程中的一些动态因素,如原诗文本、译者、译语读者等的共同影响,来实现译语诗歌的再生,从而促进文化间的交流发展.     

Issues in the integration of religious education and worldviews education in an intercultural context

ABSTRACT

The Council of Europe’s 2008 ‘Recommendation’ advocates the study of ‘non-religious convictions’ in schools in addition to religions. In 2018, there is evidence of growing academic interest in the inclusion of non-religious worldviews in the school curriculum, but few European countries include such a study within religious education. The guidance document, Signposts, recognises that the integration of religions and non-religious worldviews is problematic for policy makers, teacher trainers and schools and that there is a need for further research. Norway and England are at significant but different stages in the process of integration. This article presents a comparative study which draws on the findings of research in both countries which has investigated the process at classroom and policy levels, and issues raised by this. Four issues are explored: practical challenges; differing understandings of the concept of worldviews; the inclusion of non-religious worldviews as a political issue and influences on the selection of worldviews. The article concludes with a discussion of issues and findings within a supranational context and makes recommendations which highlight the value of integration and the need for both contextual studies and further comparative research.