A Factor-Adjusted Multiple Testing Procedure With Application to Mutual Fund Selection

In this article, we propose a factor-adjusted multiple testing (FAT) procedure based on factor-adjusted p-values in a linear factor model involving some observable and unobservable factors, for the purpose of selecting skilled funds in empirical finance. The factor-adjusted p-values were obtained after extracting the latent common factors by the principal component method. Under some mild conditions, the false discovery proportion can be consistently estimated even if the idiosyncratic errors are allowed to be weakly correlated across units. Furthermore, by appropriately setting a sequence of threshold values approaching zero, the proposed FAT procedure enjoys model selection consistency. Extensive simulation studies and a real data analysis for selecting skilled funds in the U.S. financial market are presented to illustrate the practical utility of the proposed method. Supplementary materials for this article are available online.     

Perimeter-area ratio effects of urbanization intensity on forest characteristics,landscape patterns and their associations in Harbin City,Northeast China

To maximize the ecological services of urban forests, a better understanding of the effects of urbanization on urban forest characteristics, landscape metrics, and their associations is needed for landscape-related regulations in space-limited green infrastructure of metropolitan regions. In this study, Harbin, a typical fast-growing provincial-capital city in Northeast China, is used as a case study. Based on remote sensing images, field surveys, and correlation and variation partitioning analyses, we conclude that landscape characteristics and forest attributes have large variations among different urbanization intensity (UI) regions. Forest patch density (PD), landscape shape index, woody plants species richness, and the Shannon–Wiener index (H′) increased linearly, while stem section area and tree height decreased linearly with the increasing of UIs. UI had a greater influence on tree size and forest community attributes than the forest landscape pattern. Accordingly, any landscape regulation on forest attributes should be implemented according to UIs. In addition, Euclidean nearest neighbor distance(ENN-MN), mean perimeter-area ratio (PARA-MN), fractal dimension index(FRAC-MN), and PD could probably indicate forest attributes the most, e.g., the increase of PARA-MN may be accompanied with taller trees in low and heavy UI regions, but lower woody plants species evenness in low and medium UI regions. More diversified woody plants species, and afforested areas should be advocated in a low UI region, while in a heavy UI region, the conservation of large trees should be implemented. Our results highlight that the implementation of urban forest management should vary according to different urbanization regions to maximize ecological services.

     

考虑项目关联关系的R&D网络风险传播建模与仿真

考虑同一企业内不同项目间关联关系的情况下,基于研发项目的数量将研发网络分为不同子网络。借鉴SIS模型构建了R&D网络风险传播动力学模型,并对该模型进行了数理解析与仿真分析。结果表明：R&D网络风险传播阈值是由不同子网络的拓扑结构以及企业内不同项目间的关联程度共同决定的;考虑项目关联的研发网络风险传播阈值小于不考虑关联关系的研发网络风险传播阈值;项目间关联关系的企业个数及项目间的关联程度对风险在不同子网络上的传播速度与传播范围均具有影响。该研究成果对于提高研发网络抗风险能力具有重要意义。     

Critical Infrastructure Vulnerability to Spatially Localized Failures with Applications to Chinese Railway System

This article studies a general type of initiating events in critical infrastructures, called spatially localized failures (SLFs), which are defined as the failure of a set of infrastructure components distributed in a spatially localized area due to damage sustained, while other components outside the area do not directly fail. These failures can be regarded as a special type of intentional attack, such as bomb or explosive assault, or a generalized modeling of the impact of localized natural hazards on large‐scale systems. This article introduces three SLFs models: node centered SLFs, district‐based SLFs, and circle‐shaped SLFs, and proposes a SLFs‐induced vulnerability analysis method from three aspects: identification of critical locations, comparisons of infrastructure vulnerability to random failures, topologically localized failures and SLFs, and quantification of infrastructure information value. The proposed SLFs‐induced vulnerability analysis method is finally applied to the Chinese railway system and can be also easily adapted to analyze other critical infrastructures for valuable protection suggestions.     

加强大学生党员先进性建设促进大学生思想政治教育

文章结合合肥工业大学集中开展的保持共产党员先进性教育,特别是通过加强大学生党员的先进性建设,发挥学生党员的主动性、积极性和模范带头作用,进一步加强和改进大学生思想政治教育的实践,阐释了该校找准两者结合点,促进两者协同发展的基本做法和经验.     

浅析五四精神的继承与发扬——以五四精神淬炼新时代青年的理想信念

100多年以前,我国爆发了伟大的五四运动,青年是发起五四运动的主力军,在五四运动中起了关键作用,表现出了大无畏的牺牲精神、敢为天下先的精神和强烈的爱国主义精神.从此,青年在广阔的历史舞台上活跃起来,开启了青年发起进步运动的先河.当代青年应继承和发扬五四精神,为实现中华民族伟大复兴的中国梦而不懈奋斗.     

基于职业承诺视角的酒店管理专业学生顶岗实习分析

影响酒店专业学生职业承诺的因素较多,着重选取学生顶岗实习这一环节,分析学生性格、实习工作性质、工作环境、薪 资报酬等对学生择业、就业的影响;并在此基础上提出,学校要培养学生良好的实习态度,提高学生社会化程度,并加强学生实 习过程管理,合理安排学生工作量,帮助学生建立良好的职业规划;在校企合作上,要精选实习基地,提高学生适应能力,完善 学生实习薪酬体系等,以提高学生从事酒店行业的职业承诺水平。     

新时期乡村管理体制改革的问题与措施——以湖南省H县为研究个案

新农村建设时期,乡村管理体制仍然存在与新农村建设实际不和谐的矛盾。通过对H县的实地调研,分析了当前乡村管理体制中存在的部分乡镇干部观念滞后、政府在转型过程中对农民实际服务偏少、乡镇干部和农民对待乡村干部的产生方式观点不一致等诸多问题,阐释了基层主体对强化乡镇作用与大力推进村级自治以及尽快撤消乡镇一级政府进行改革的两种思路,从精简机构与人员、推进基层自治、加强农民组织等方面提出了深化乡村管理体制改革的建议。     

论高校辅导员在学风建设中的作用

对合肥市七所高校的1 200名学生进行问卷调查,发现高校学风中存在一些问题,需要我们给予高度重视。高校辅导员具有管理与育人的双重身份,在学风建设中起着不可替代的作用。文章就高校辅导员如何充分发挥在学风建设中的作用,提出了一些意见。     

犯罪观的“交锋”:“刑事和解”与传统犯罪理论

“刑事和解”的出现显示了对犯罪的另一种理解可能。以传统犯罪理论为背景,以比较分析为基本路径,可以全面展现两种犯罪知识与理念的“交锋”。从宏观角度看,两者对犯罪的不同理解根源于观察路径和方法论立场的重大分歧 :传统理论着眼于“远距离观察模式”,形成了“国家中心主义”的犯罪观;而和解理论则立基于“近距离观察模式”,发展出“被害人中心主义”的犯罪观。在这样的逻辑脉络下,两者在社会危害性理论、刑事法律关系及被害人同意等问题域中,产生出辐射性的对峙与紧张。作为某种反思性的维度,“刑事和解”在侵害个人法益的犯罪中具有相当的解释力,为重新估价和改进传统犯罪理论提供了重要契机。