Oracle properties of SCAD-penalized support vector machine

In many scientific investigations, a large number of input variables are given at the early stage of modeling and identifying the variables predictive of the response is often a main purpose of such investigations. Recently, the support vector machine has become an important tool in classification problems of many fields. Several variants of the support vector machine adopting different penalties in its objective function have been proposed. This paper deals with the Fisher consistency and the oracle property of support vector machines in the setting where the dimension of inputs is fixed. First, we study the Fisher consistency of the support vector machine over the class of affine functions. It is shown that the function class for decision functions is crucial for the Fisher consistency. Second, we study the oracle property of the penalized support vector machines with the smoothly clipped absolute deviation penalty. Once we have addressed the Fisher consistency of the support vector machine over the class of affine functions, the oracle property appears to be meaningful in the context of classification. A simulation study is provided in order to show small sample properties of the penalized support vector machines with the smoothly clipped absolute deviation penalty.     

Correcting double outward box distributed residuals by WCEV

Double outward box distributed residuals are another type of non monotonic heteroscedasticity that severely violates homoscedasticity assumption. In this study Çelik's (2015 Çelik, R. (2015). Stabilizing heteroscedasticity for butterfly-distributed residuals by the weighting absolute centered external variable. J. Appl. Stat. 42(4):705–721.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]) WCEV is applied to double outward box distributed residuals to provide homoscedasticity for simple and multiple regression models.     

宅基地使用权物权化探微

《物权法》的颁布确立了宅基地使用权的物权地位,但短短四条的法律条文并未体现出用益物权的应有权利。单一的住房保障价值取向在市场经济的冲击下,已不能满足农村生活的需要。对宅基地使用权物权化的讨论既要考虑其深刻的历史背景,反映宅基地使用权的福利属性;也要重视现实需求,突出宅基地使用权的财产属性。由于宅基地使用权兼具福利和财产双重属性,与传统物权法上的保障特定主体生存利益的人役权和提升土地资产效用的地上权具有相似之处,因此在体现福利属性的初始取得阶段,宅基地使用权应体现人役权特点,在之后的体现财产属性的流转及消灭阶段,应适用地上权规则。     

黑格尔的宗教神学观与哲学史的联系

黑格尔的社会思想包含着非常复杂的思想元素。既有希腊哲学家的思想成分,又有新柏拉图主义的思想成分。同时,神秘主义哲学和基督教思想也都对他产生过影响。他的宗教哲学包容了所有的这些思想形态。     

Frontiers of Stochastically Nondominated Portfolios

We consider the problem of constructing a portfolio of finitely many assets whose returns are described by a discrete joint distribution.We propose mean‐risk models that are solvable by linear programming and generate portfolios whose returns are nondominated in the sense of second‐order stochastic dominance. Next, we develop a specialized parametric method for recovering the entire mean‐risk efficient frontiers of these models and we illustrate its operation on a large data set involving thousands of assets and realizations.     

重贤不尚贤用贤且防贤--韩非贤能观初探

韩非的贤能观以维护君主独裁专制的法治理论为基础。韩非虽充分肯定贤能在辅佐君主建功立业中的重要作用,但同时也严厉抨击了战国时期“上贤任智无常”造成弑君篡位的弊端,“上 (尚)法不上 (尚)贤”,用贤以“明法”为的彀是韩非贤能观的本质。举贤任能,韩非主张以“参伍之道”察言识人,以“隐栝之道”大量使用一般人才,坚持原则反对用人的不正之风。使贤用能,韩非强调以法治官与用术禁奸相结合,充分调动百官尽忠尽责的积极性。     

Spousal resources and relationship quality in eight European countries

ABSTRACT

We relate relationship satisfaction and thoughts about leaving a romantic relationship to a couple’s relative and absolute resources and check for context-dependency of those associations. Our theoretical point of departure is that the more resources women have compared to their spouses, the higher their intra-household bargaining power to negotiate themselves out of unpleasant tasks, particularly in gender-egalitarian and very income equal and unequal societies. In traditional societies (which score low on the Gender Empowerment Measure (GEM)), the inflexible role of men within the household presumably prevents women from bargaining a better position, which in turn negatively affects relationship quality. Income equality (low GINI coefficient) may be a prerequisite for women’s bargaining position, where more inequality (mid-GINI) may be detrimental for it. Nevertheless, extreme income inequality (high GINI) may again be favorable for women’s relationship power. Using country fixed effects models on data from the Generations and Gender Surveys (GGS), we compare men and women who are in a couple (formed after 1995) for eight European countries. We find that absolute resources matter more than relative resources, at least for relationship satisfaction: Higher educated couples are more satisfied with their relationships, which could suggest lower stress levels in those couples (in more traditional contexts). Second, we observe GINI context-dependency of the association between relative education and relationship satisfaction for women and relative education and exit thoughts for men, although opposite to what we expected. Perhaps reference group theory or gender display theory can explain these unexpected results. Finally, we find that women have more break-up plans in societies with a lower score on GEM. This last result is consistent with the notion that bargaining only works in egalitarian contexts.     

相对贫困的理论与政策聚焦 ——兼论建立我国相对贫困的治理体系

贫困一直是世界各国首要解决的社会问题。本文基于我国全面进入小康社会,需要建立解决相对贫困长效机制这一战略转换背景,从相对贫困与绝对贫困关系入手,围绕相对贫困内涵的争论,聚焦我国相对贫困的表现形式,并基于我国国情,提出建立相对贫困治理体系的建议。在机制上,充分发挥基本公共服务的作用,建立相对贫困人口发展的基础性机制;形成"政府主导、社会参与、市场促进"的贫困治理的整体性机制;建立干预代际贫困传递的阻断性机制。在具体措施上,围绕低收入家庭,要建立生活负担减免制度;健全以生产帮扶和就业帮扶为主的专项援助制度;按需救助,对低收入户开展"救助会诊";建立相对贫困家庭陪伴式服务制度。     

影响低温烧成碳化硅磨具硬度因素的探讨

通过调整磨具中结合剂的用量,成型密度,结合剂的耐火度及流动性,磨具的烧成温度,可使生产的低温烧成碳化硅磨具的硬度和强度都比较高.     

人的全面发展也是硬道理--解读中国共产党的人文思想

以人为本,促进人的全面发展是一个美好的理想,需要经历一个很长的过程,才可以接近这个目标。在这个过程的起始点上,首先要解决人的基本生存问题,其次是促进人的全面发展问题。受中国文化和客观环境的制约,这一过程表现了中国独特的进步路径。