On Bartlett correction of empirical likelihood for regularly spaced spatial data

Bartlett correction constitutes one of the attractive features of empirical likelihood because it enables the construction of confidence regions for parameters with improved coverage probabilities. We study the Bartlett correction of spatial frequency domain empirical likelihood (SFDEL) based on general spectral estimating functions for regularly spaced spatial data. This general formulation can be applied to testing and estimation problems in spatial analysis, for example testing covariance isotropy, testing covariance separability as well as estimating the parameters of spatial covariance models. We show that the SFDEL is Bartlett correctable. In particular, the improvement in coverage accuracies of the Bartlett‐corrected confidence regions depends on the underlying spatial structures. The Canadian Journal of Statistics 47: 455–472; 2019 © 2019 Statistical Society of Canada     

丹巴土司制度发展历史考证

丹巴位于“藏彝走廊”的核心区域，其对汉藏民族关系、中央政权与边疆地区的稳定均具有重要影响。自忽必烈时期开始丹巴即开始实行土司制度直至新中国成立，研究丹巴的土司制度发展历史对梳理“藏彝走廊”民族关系及社会发展历史具有重要作用。本文对丹巴土司制度的发展历史进行了考证，并对其境内的四个土司的管辖范围、权力地位进行了梳理，以期对该地区历史发展研究提供一些参考与借鉴。     

Fast and approximate exhaustive variable selection for generalised linear models with APES

We present APproximated Exhaustive Search (APES), which enables fast and approximated exhaustive variable selection in Generalised Linear Models (GLMs). While exhaustive variable selection remains as the gold standard in many model selection contexts, traditional exhaustive variable selection suffers from computational feasibility issues. More precisely, there is often a high cost associated with computing maximum likelihood estimates (MLE) for all subsets of GLMs. Efficient algorithms for exhaustive searches exist for linear models, most notably the leaps‐and‐bound algorithm and, more recently, the mixed integer optimisation (MIO) algorithm. The APES method learns from observational weights in a generalised linear regression super‐model and reformulates the GLM problem as a linear regression problem. In this way, APES can approximate a true exhaustive search in the original GLM space. Where exhaustive variable selection is not computationally feasible, we propose a best‐subset search, which also closely approximates a true exhaustive search. APES is made available in both as a standalone R package as well as part of the already existing mplot package.     

Maternal Postpartum Depression Increases Vulnerability for Toddler Behavior Problems through Infant Cortisol Reactivity

The current study examined the role of hypothalamic‐pituitary‐adrenal reactivity (a physiological indicator of stress) in early infancy as a mediator of the relationship between maternal postpartum depression and toddler behavior problems. Participants were 137 at‐risk mothers and their children participating in a longitudinal study of intergenerational transmission of risk. Mothers’ depression was measured five times during the infants’ first 18 months. Infant cortisol was collected during a social stressor (the still‐face paradigm) when infants were 6 months old, and mothers reported on toddlers’ internalizing and externalizing symptoms at 18 months. Among this sample of high‐risk mother–infant dyads, early postpartum depression predicted atypical infant cortisol reactivity at 6 months, which mediated the effect of maternal depression on increased toddler behavior problems. Clinical implications are discussed.     

日本红十字会参与疫情危机应对的机制及启示

新冠肺炎疫情发生后,中国社会各界积极踊跃捐赠款物,体现了中华民族“一方有难、八方支援”的大爱精神。在此次新冠肺炎疫情防控中,地方政府依循惯例,迅速指定省、市红十字会和慈善总会作为接受社会捐助的专责机构,发挥了重要作用。然而,疫情重灾区湖北、武汉的红十字会却暴露出救援物资分配不均、捐赠收取管理费等问题。本文从国际比较视野出发,选取日本红十字会为研究对象,采取政策文本分析等研究方法,考察日本红十字会的疫情防控参与机制与捐赠款物分配机制,并提出对中国的若干启示。     

春心莫共花争发,一寸相思一寸灰——评李商隐无题诗之幻灭感

李商隐的无题诗充满了悲剧美和幻灭感。究其原因与当时的日薄西山的晚唐颓势、政治漩涡中的悲惨仕遇、无可倚恃的不幸家世以及爱而不得的恋情悲歌等种种无奈与不幸有关。     

“人格三结构”视域下的大学生党员培训体系研究

大学生党员质量的高低直接影响着中国共产党的未来发展质量,建立健全党员培训体系是保证党员质量的关键。在"人格三结构"视域下,学生党员培训工作可概括为,通过组织的力量帮助大学生从入党积极分子的"本我"、预备党员的"自我"向着正式党员的"超我",不断成长提升的过程。针对目前大学生党员存在的部分思想动机不纯、理论认知相对肤浅、社会实践能力较为薄弱以及党员培训体系不够完善等问题,高校应当建立包括前期选拔式培训、中期提升式培训、后期养成式培训在内的"三位一体"的党员培训体系。