Testing the monotonicity or convexity of a function using regression splines

Methods for smoothed isotonic or convex regression are useful in many applications. Sometimes the shape assumptions constitute a priori knowledge about the regression function, but often the shape is part of the research question. The authors propose tests for monotonicity and convexity using constrained and unconstrained regression splines. The tests have good large‐sample properties and the small‐sample behaviour is illustrated through simulations. Extensions to the partial linear model and the generalized regression model are presented. The Canadian Journal of Statistics 39: 89–107; 2011 © 2011 Statistical Society of Canada     

It's More Than an M‐shape: The Political Economy of Female Non‐Standard Workers in the Republic of Korea

This study examines the re‐entrance of female workers into the Korean labor market. We highlight that women in their 40s have the highest rate of employment among all female workers and that a large proportion of these women are entering into non‐standard employment. In approaching this question, we examine the political economy of this phenomenon by first discussing the demand side of the Korean labor market using the gendering of the varieties of capitalism argument and then the supply side with the work–life balance argument. When examining re‐entrance into the labor market, women with general skills with lower education and higher education both found it more feasible to re‐enter the labor market as non‐standard workers. While work–life balance is a prominent reason for women's choice of opting out of the labor market, work–life balance choice mattered less for women re‐entering the labor market as non‐standard workers in their 40s and 50s but instead firmly based skill formation mattered more. In addition, the retail service industry is suggested to absorb a large number of female workers with lower skill levels who would have had difficulties in re‐entering other male‐oriented companies.     

中国古代分封制与郡县制之争

由于中国古代社会君主专制的中央集权政权不断巩固与发展,自秦汉以来郡县制一直占主导地位,而分封制也以与西周不同的形式长期延续存在.分封制与郡县制都是君主专制政体下中央和地方关系的体现形式,二者的长期争论反映了中央集权与地方分权的斗争.     

TiNi和TiNiCu记忆合金薄膜的温度记忆效应研究

在形状记忆合金的相变过程中,如果温度升至TS后停止升温,并降温至马氏体相变结束温度Mf以下,则在下一次完全相变循环中出现动力学停顿,而这一动力学停止温度点与上次的停止温度密切相关,这一现象被称为温度记忆效应。该文通过示差扫描量热法对TiNi和TiNiCu合金薄膜进行一次或连续几次不完全相变,系统地研究了温度记忆效应。结果表明,不仅温度记忆效应是形状记忆合金固有现象,而且温度记忆效应与马氏体变体间的弹性能及母相和马氏体相之间的共格应变密切相关。     

冶金设备备件制造企业信息化规划

在分析企业业务和价值链的基础上,构建了包含文化创新、管理创新和技术创新三大平台的企业应用系统模型,通过研究应用系统对数据处理特点和可靠性要求,将企业信息化模型划分成了知识层、管理层、执行层和控制层四个层次,在此基础上提出了冶金设备备件制造企业的网络系统和主机及存储模型.     

A general class of flexible Weibull distributions

We consider a linear combination of two logarithms of cumulative hazard functions and propose a general class of flexible Weibull distribution functions which includes some well-known modified Weibull distributions (MWDs). We suggest a very flexible Weibull distribution, which belongs to the class, and show that its hazard function is monotone, bathtub-shaped, modified bathtub-shaped, or even upside-down bathtub-shaped. We also discuss the methods of least square estimation and maximum likelihood estimation of the unknown parameters. We take two illustrated examples to compare the suggested distribution with some current MWDs, and show that the suggested distribution shows good performances.     

玉石冲突与四时转换--<红楼梦>结构论研究浅探

红学自产生以来就一直方兴未艾，研究《红楼梦》的专著和文章更是汗牛充栋。本文运用结构主义方法来解读《红楼梦》，发现木石前盟与金玉良缘间的矛盾即玉石对立冲突是《红楼梦》全书的最核心结构。而这种玉石冲突又是按时间顺序展开，通过四季循环将《红楼梦》的哲理提升到二律背反的人类悲剧命运的高度，进而对《红楼梦》的主题说、作者说得出自己的结论。     

从转喻与隐喻看新时期小说的发展

从转喻与隐喻的叙事形态角度考察新时期小说的发展 ,将其分为四个时期进行分析 ,并得出结论 ,小说应在转喻与隐喻的适度融合中兼顾写实与象征 ,以诗意内涵提升小说的艺术价值     

古代夯具述论

土木结构是我国古代建筑的主要形式,夯具则是重要的建筑工具,它的改良和发展与生产力水平的提高紧密相关。从考古材料看,夯具主要有石质、木质和铁质三种类型,其形制的演变和功能的改善,不仅反映了人类改造自然能力的提高,也是社会进步的一个重要标志。     

齐瓦当艺术论

齐瓦当是指带有齐国文化色彩的瓦当，包括春秋战国时期的齐国、汉代的齐国及周边受齐文化影响的地区所发现的瓦当，其基本范围在今山东省境内。齐国瓦当纹饰具有鲜明的地方特色，无论是题材内容的选择，还是整幅画面的布局以及形象的塑造，都具有不同于别国的艺术特色。齐瓦当以其特有的内容、新颖的构图和独特的艺术风格，成为齐文化的一个重要组成部分，其所附着的丰富的文化信息，对于我们研究古代文明甚至远古文明的发展变化，提供了不可多得的实物资料。