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.     

Closure property of consistently varying random variables based on precise large deviation principles

Let X = {X₁, X₂, …} be a sequence of independent but not necessarily identically distributed random variables, and let η be a counting random variable independent of X. Consider randomly stopped sum S_η = ∑^η_{k = 1}X_k and random maximum S_(η) ? max?{S₀, …, S_η}. Assuming that each X_k belongs to the class of consistently varying distributions, on the basis of the well-known precise large deviation principles, we prove that the distributions of S_η and S_(η) belong to the same class under some mild conditions. Our approach is new and the obtained results are further studies of Kizinevi?, Sprindys, and ?iaulys (2016) and Andrulyt?, Manstavi?ius, and ?iaulys (2017).     

基于Mo-RVIKOR的混合多属性决策方法

针对复杂性和不确定性多属性决策问题,考虑定量和定性融合的属性形式,提出了模块化随机多准则妥协解排序法（Modular Random VlseKriterijumska Opti-mizacija I Kompromisno Resenje,Mo-RVIKOR）,该方法无需将信息统一,就能处理多种信息形式存在的多属性决策问题。采用精确数、随机变量处理定量评价信息,用概率语义术语集处理定性评价信息;通过改进离差最大化法确定属性权重;根据Mo-RVIKOR对决策对象进行排序;最后以某公司C2B定制化服务质量评测项目为例,验证了所提方法的有效性。     

教育不平等的测度及与收入分配的关系

教育是人力资本形成的重要途径,公平的教育分配对基础广泛的经济增长与贫困的减少具有显著的重要性。在教育与收入分配关系的理论与实证研究中,已有不少文献从教育存量角度对其进行探讨,然而专门从教育不平等角度进行的研究则不多。文章首先对国外有关教育不平等系数的测定方法进行总结与评述,随后从理论与实证两个层面对教育不平等与收入分配的关系研究进行评述,并在既有研究的基础上,对相关后续研究提出进一步的研究思路。     

翻译中社会文化语境制约下的语义偏移

社会文化语境对语义内涵有制约作用,是读者建立文化系统关联并进行语义理解及迁移的重要保证和现实基础。翻译中语义的迁移也不是简单的移植过程,而是基于语境的再创造,即在对目标语读者的文化认知框架预测的基础上,进行以引申为机制的语义偏移。语义偏移分别表现在主题关联、文化意象处理、思维习惯差异、价值观差异、语义空缺等方面。翻译中的语义偏移是在语言间产生动态对应的重要表现。     

Conjuncture and cultural reproduction in the process of embedding: social work practice in the context of government purchase of services in China

This paper focuses on the Chinese government’s policy of purchasing social services and discusses how relevant organisations provide social work and develop it within local socio-political and cultural contexts. An ethnographic research method was adopted for the study by the first author while participating in social work development in Q City. We argue that the policy of purchasing social services succeeded in achieving “embedded development” but also created a “conjuncture structure” in cultural reproduction. However, due toprofessional social workers in China have, in practice, passively responded to the conjuncture there has been a failure to reproduce professional values of social work in the Chinese cultural context. Therefore, further development of social work in China needs to strengthen cultural reflection in practical actions, focus on the exploration of cultural connections between social work practice and local communities, and enhance the cultural capacity of social workers in the local cultural context.     

均值绝对偏差资产组合选择模型的算法

对均值绝对偏差模型进行了简化,并利用一种旋转算法求解。这种算法比单纯形算法的计算简便,且计算量更小。利用上海和深圳股市1 072支股票70期周末收盘价所作的实验结果表明,对于资产无上界限制的模型,计算20个不同最优投资组合需要1 274次旋转运算,上界为10%时需要1 570次旋转运算,每 次旋转运算约需1 14171次加法和乘法运算。     

对高校新生适应期目标缺损现象的研究

高校新生进入大学后在学习、生活、心理等方面有一个适应期，适应期的长短直接影响着大学生的成长、成才。在适应期中。大学新生普遍存在目标缺损现象，即大学新生在一定环境条件下，按一定标准所确立的目标（或潜在目标）与高校的实际情况存在偏差。文章从大学新生目标缺损现象的表现形式入手，从思想政治素质、大学的学习和生活方式、大学的教学和管理模式、大学新生的特点等方面分析研宛造成目标缺损现象的主要原因，提出了大学生目标缺损的校正对策。     

政府绩效评估价值取向偏差性研究——来自广东某市S镇的调查

目前国内关于政府绩效评估的研究现状表明,开展政府绩效评估价值取向偏差实证研究有其必要性。该研究挑选出4个反映地方政府绩效评估价值取向的测量维度,亦即评估主体、评估指标、评估程序和民众满意度,进行研究量表的设计,对广东某市S镇进行实地调查,探讨政府绩效评估实践在"民众本位"这一价值取向方面的偏差。     

辽宁省朝阳县产业结构演进实证分析

利用偏差份额模型对辽宁省朝阳县的产业结构进行了定量分析,结果表明,朝阳县的产业结构素质较差,第一产业的竞争力在不断下降;第二产业的竞争力较强但波动很大,对县域经济的发展呈现出高的贡献率;第三产业发挥稳定且有竞争力上升趋势。通过比较劳动生产率模型分析优势产业发现,朝阳县的优势产业在第二产业,因而产业政策制定应以壮大第二产业为主。第三产业是朝阳县的朝阳产业,存在巨大发展潜力。通过产业演进理论分析朝阳县的产业发育还不成熟,产业结构有待优化和升级。