Identity and Schooling among the Naxi

This paper examines the role of schooling in constructing identity of Naxi secondary students in Lijiang, southwest China. The study shows that the school assigns an identity of the Chinese nation to Naxi students, while it also plays a role in forming their ethnic identity. The school curriculum, teachers' teaching, and interactions among students influence the identity construction of Naxi students. A qualitative method was designed to collect data for this study.     

Generalized likelihood ratio tests for the structure of semiparametric additive models

Semiparametric additive models (SAMs) are very useful in multivariate nonparametric regression. In this paper, the authors study nonparametric testing problems for the nonparametric components of SAMs. Using the backfitting algorithm and the local polynomial smoothing technique, they extend to SAMs the generalized likelihood ratio tests of Fan &Jiang (2005). The authors show that the proposed tests possess the Wilks‐type property and that they can detect alternatives nearing the null hypothesis with a rate arbitrarily close to root‐n while error distributions are unspecified. They report simulations which demonstrate the Wilks phenomenon and the powers of their tests. They illustrate the performance of their approach by simulation and using the Boston housing data set.     

板式换热器经济性优化研究

针对板式换热器选型利用经验估算准确度低,利用软件Access 2010建立板换数据库和Visual Basic 6.0等工具开发了热工计算软件。在利用热平衡计算、传热计算和校核计算为主要数学模型基础上,增加了价值型评价方法。文中重点介绍了价值型评价方法,具体分析了初次投资费用和后续运行费用。结合实际算例,利用开发的软件选择满足热负荷以及压降的板式换热器,得到型号为E100 AF MH的换热器换热面积最小,型号为BR0.4B的换热器总费用最小。结果表明换热面积与总费用不一定同时最优。文中所用的选型方法结合软件提高了选择效率,考虑用价值型评价方法选出了费用最少的型号,可节约成本、提高经济效益。     

1994-2014年中国港口业与沿海区域经济增长的重心移动轨迹和时空差异分析

将五大港口群作为研究对象,按照由全局→局部的分析思路,运用重心移动模型、探索性空间数据模型,建立关于沿海区域港口业和沿海区域经济增长的综合评价指标体系,定量分析1994-2014年间中国港口业与沿海区域经济增长的时空差异演变与特征.结果 表明:在重心移动轨迹上,沿海区域港口业和经济增长重心集中在南部并且有逐渐向长三角移动的趋势.在全局层面上,港口业在时间和空间维度上呈现由显著正相关到显著负相关的时空差异;沿海区域经济增长在时间和空间维度上始终保持空间正相关;港口业-沿海经济增长在时间和空间维度上表现为"正-负-正"三个阶段.在局部层面上,港口业H-H型区域由珠三角向长三角移动,L-L型区域集中在西南沿海区域和环渤海西部;沿海区域经济水平H-H型区域集中在珠三角和长三角以及环渤海南部,整体趋势无太大变化,L-L型区域集中在河北、广西、海南;港口业-沿海经济增长L-L型区域呈现珠三角、长三角两个中心并有向周边区域扩大的趋势,L-L型区域集中在河北以及西南沿海,但两大区域的L-L型空间范围有缩减的趋势.     

基于两阶段交叉效率模型的中国商业银行效率评价

为了更好的评价我国商业银行的效率,在传统两阶段DEA模型中引入交叉效率,并对两阶段生产系统的内部结构进行优化,构建了考虑共享投入和非期望产出的两阶段交叉效率模型。最后结合中国16家商业银行2006-2015年的年度报表,分别应用传统的两阶段DEA模型和新模型评价样本银行的效率。结果表明：新模型比传统模型更客观、区分力更强,具有更强的稳定性,更适合用于评价我国商业银行的效率。     

新时期推进新四军“铁军精神”研究刍议

新四军“铁军精神”是新四军在对敌斗争与政权建设中所形成优良传统和作风。新四军“铁军精神”研究在分析具体内涵、挖掘当代价值、探讨传承发展等方面取得丰硕成果,但是与同时代我党创造和培育的井冈山精神、长征精神、延安精神等的研究相比,存在明显不足。新四军“铁军精神”研究要从深化新四军“铁军精神”的内涵研究、分析新四军“铁军精神”的流变过程、开展新四军“铁军精神”与社会主义核心价值体系建构的研究、进一步挖掘“铁军精神”的当代价值等四个方面明确研究的重点方向。推进新四军“铁军精神”研究,还需要综合运用历史学、政治学、社会学等多种方法,注重研究内容、研究视角、研究方法的创新。     

个体差异视角下城市居家养老服务质量研究——以南昌市为例

文章利用南昌市所辖的东湖区、西湖区、青山湖区、青云谱区、湾里区和红谷滩区共6个区60岁以上接受过居家养老服务的自理老人的调查数据。运用多元方差分析方法,从个体差异角度对南昌市城市居家养老服务质量影响因素进行分析。研究发现,性别、年龄、学历、职业、居住状况、收入水平、收入来源等方面存在的差异,影响城市居家养老服务质量评价的高低。     

驳现代西方主流学派的社会阶级理论

现代西方主流学派对当今资本主义社会阶级阶层状况的阐释,既有启发,也存在缺陷.在后工业社会,知识阶层的作用显著提升,但知识技术作为劳动能力不能作为阶级划分的基础.后现代主义关注个体生活权利,却不能以社会的差异性、个体化和多样性否定历史发展的内在规律以及阶级意识的作用.在后资本主义社会,阶级阶层结构和关系变得多元复杂化,应将阶级分析和阶层分析结合起来,但不能因此否定其阶级社会的本质.     

Feature screening for case‐cohort studies with failure time outcome

Case‐cohort design has been demonstrated to be an economical and efficient approach in large cohort studies when the measurement of some covariates on all individuals is expensive. Various methods have been proposed for case‐cohort data when the dimension of covariates is smaller than sample size. However, limited work has been done for high‐dimensional case‐cohort data which are frequently collected in large epidemiological studies. In this paper, we propose a variable screening method for ultrahigh‐dimensional case‐cohort data under the framework of proportional model, which allows the covariate dimension increases with sample size at exponential rate. Our procedure enjoys the sure screening property and the ranking consistency under some mild regularity conditions. We further extend this method to an iterative version to handle the scenarios where some covariates are jointly important but are marginally unrelated or weakly correlated to the response. The finite sample performance of the proposed procedure is evaluated via both simulation studies and an application to a real data from the breast cancer study.