对波兰共产党处理宗教问题的几点思考

长期以来,波兰统一工人党在宗教政策上出现了一系列的严重失误:党内宗教问题指导思想不明确,宗教政策缺乏稳定性、连续性,主动放弃领导地位.处理宗教问题不当,是波兰统一工人党失去政权的原因之一.     

浅析消费社会的异化

消费社会的异化表现为商品使用价值背离,消费价值衰减;由理性消费走向感性消费;炫耀性消费盛行等。消费社会的异化是对可持续发展观的背离,必然引发资源和环境危机。为了消除危机,要合理消费,控制消费主义,最终达到根除消费社会异化的目的。     

Household Assets,the Role of Government Assistance,and Depression Among Low-Income Families in Shanghai

As China’s economy is rapidly changing from a planned to a capitalist economy, many families find themselves financially struggling. In some cases, conflicting values and attitudes may contribute to mental health challenges such as depression that would lead to further feelings of helplessness and immobilization. Using a random sample of 1006 low-income households from Pudong District of Shanghai, China, this study aims to examine the relationships between household assets, beliefs about government as the primary way to improve economic circumstances and self-reported depressive symptoms. In addition, this study investigates the mediation effects of beliefs that government is the best change agent for improved life circumstances on the relationship between household assets and depression. We found those who indicated that government was the main means for attaining a better life had significantly higher depression levels whereas higher numbers of household assets were associated with lower depression levels. We also found that viewing government as the most important change agent only partially mediated the relationship between household assets and depression (p?<?.001). Findings from this study support anti-poverty policies and social work related practice initiatives aimed at assisting low income families in China, in particular the need to address psychological as well as economic needs.

     

可持续生计视角下"参与式"反贫困路径探索

中国扶贫实践中出现的"贫困户生计能力提升不足"倾向源于可持续生计框架与现代贫困观念之间的冲突,而"社会参与"则为解决冲突提供了一种可能。2020年后,面对新的贫困现象和贫困结构,"参与式"反贫困理念能够通过社会参与链接可持续生计框架和现代贫困观念,在贫困治理过程中充分体现贫困者的参与性,形成主体意识和责任意识,提升个体或家庭改善生计系统的能力,使其摆脱困境、规避陷入贫困的风险,进而形成权利-义务相平衡、对城市和农村具有包容性、常态化、可持续的贫困治理策略,使全体社会成员实现不虞匮乏的生活。     

欧洲一体化进程中的"反一体化"分析

随着欧洲一体化的演进,反对、抵制一体化的思想与行动一直此起彼伏,反一体化伴随着一体化进程的始终."反一体化"活动主要在国家、政党和民众三个层次上展开,遍及政治、经济、社会文化等领域.其动因主要在于一体化进程对利益的重新分配所引发的复杂利益冲突和传统主权观、民族主义思想与一体化现实之间产生的尖锐对立."反一体化"对一体化进程产生了重要的影响.一方面它是一体化前进的阻力,另一方面又对一体化的发展产生了建设性的影响,使一体化能够相对稳定地向前迈进.反一体化将长期存在,并在欧洲一体化的未来发展中继续发挥自身的作用.     

Variance estimation based on blocked 3×2 cross-validation in high-dimensional linear regression

In high-dimensional linear regression, the dimension of variables is always greater than the sample size. In this situation, the traditional variance estimation technique based on ordinary least squares constantly exhibits a high bias even under sparsity assumption. One of the major reasons is the high spurious correlation between unobserved realized noise and several predictors. To alleviate this problem, a refitted cross-validation (RCV) method has been proposed in the literature. However, for a complicated model, the RCV exhibits a lower probability that the selected model includes the true model in case of finite samples. This phenomenon may easily result in a large bias of variance estimation. Thus, a model selection method based on the ranks of the frequency of occurrences in six votes from a blocked 3×2 cross-validation is proposed in this study. The proposed method has a considerably larger probability of including the true model in practice than the RCV method. The variance estimation obtained using the model selected by the proposed method also shows a lower bias and a smaller variance. Furthermore, theoretical analysis proves the asymptotic normality property of the proposed variance estimation.     

Outlier detection and robust variable selection via the penalized weighted LAD-LASSO method

This paper studies the outlier detection and robust variable selection problem in the linear regression model. The penalized weighted least absolute deviation (PWLAD) regression estimation method and the adaptive least absolute shrinkage and selection operator (LASSO) are combined to simultaneously achieve outlier detection, and robust variable selection. An iterative algorithm is proposed to solve the proposed optimization problem. Monte Carlo studies are evaluated the finite-sample performance of the proposed methods. The results indicate that the finite sample performance of the proposed methods performs better than that of the existing methods when there are leverage points or outliers in the response variable or explanatory variables. Finally, we apply the proposed methodology to analyze two real datasets.     

九十年代后中国电影海报设计的风格特征

电影海报除了能够提供电影的信息之外,从设计的角度来说,它还具有很强的装饰性和观赏性,并具有独特的表现形式和艺术设计规律。文章以20世纪90年代以来中国电影海报设计为研究对象,从电影海报的性质和功能入手,对90年代以来中国电影海报设计的风格特征作出简要概括。     

Subsampling-extrapolation bandwidth selection in bivariate kernel density estimation

This paper focuses on bivariate kernel density estimation that bridges the gap between univariate and multivariate applications. We propose a subsampling-extrapolation bandwidth matrix selector that improves the reliability of the conventional cross-validation method. The proposed procedure combines a U-statistic expression of the mean integrated squared error and asymptotic theory, and can be used in both cases of diagonal bandwidth matrix and unconstrained bandwidth matrix. In the subsampling stage, one takes advantage of the reduced variability of estimating the bandwidth matrix at a smaller subsample size m (m < n); in the extrapolation stage, a simple linear extrapolation is used to remove the incurred bias. Simulation studies reveal that the proposed method reduces the variability of the cross-validation method by about 50% and achieves an expected integrated squared error that is up to 30% smaller than that of the benchmark cross-validation. It shows comparable or improved performance compared to other competitors across six distributions in terms of the expected integrated squared error. We prove that the components of the selected bivariate bandwidth matrix have an asymptotic multivariate normal distribution, and also present the relative rate of convergence of the proposed bandwidth selector.