Competitive balance and the participation–spectatorship gap in Chinese table tennis

Excessive competitive imbalance holds the potential to render teams and, by extension, leagues inviable. The China Table Tennis Super League has languished in its attempt to catch on as a popular spectator sport in spite of the sport’s popularity as recreational activity. One of the primary reasons for the participation–spectatorship gap cited by officials is competitive imbalance. This research estimates a number of within-season balance measures, including the standard deviation of winning, concentration ratio, and Herfindahl–Hirschman Index. The results show that both the men’s and women’s leagues have been relatively balanced over time. Implications regarding competitive balance and other league policy considerations are explored.     

标校机便携式测试系统的设计与实现

分析了“北斗”一号标校系统现状,指出了当前标校系统所面临的问题,提出了解 决问题的方法,设计并实现了标校机便携式测试系统。整个系统软硬件有机结合,具有体积 小、 重量轻、携带操作使用方便的优点,特别适用于现场测试,保障了标校系统设备能正常可靠地 服务于“北斗”一号卫星导航定位系统。     

Modeling of group-specific mortality in China using a modified Lee–Carter model

The paper assesses sex-age-specific mortality rates of the four groups of people in China, the country, cities, towns, and counties, based on the mortality data from the China Population Statistics Yearbooks (1988–2009) using a newly proposed modified Lee–Carter model. The results show that in general, the expected age-specific mortality rates decrease over the years, and the decreasing speed increased in the past decade. During 2000–2008, the expected mortality rates decreased over the years for females of all ages and groups and males in cities, remained with no changes for males ages 13–36 in the country and towns, but increased for males ages 13–43 in counties. Predictions for 2009 are made based on the 2000–2008 data, and comparisons to the observed rates from an annual survey show that they match each other well except for males ages 13–43 in counties, whose mortality rates reached record highs around 2005, and bounced back to the level of 2000 in 2008 and was reduced a little further in 2009, benefiting from the promulgations and enforcements of some safety regulations by the government on construction and mining sites where most labors are from counties. The predicted age-specific mortality rates from the model are compared to the assumed rates in the China Life Insurance Mortality Table (2000–2003) promulgated by the China Insurance Regulatory Commission, and they show a great deal of similarity in terms of changing trends over the ages.     

Survival on the Titanic: Illustrating Wald and Lagrange Multiplier Tests for Proportions and Logits

Abstract: Students are interested in lecture examples and class exercises involving data connected to the maiden voyage and the sinking of the liner Titanic. Information on the passengers and their fate can be used to explore relationships between various tests for differences in survival rates between different groups of passengers. Among the concepts the authors examined are tests for differences of proportions using a normal distribution, a chi-square test for independence, a test for the equality of two logits, and a test for the significance of the coefficient of a binary variable in logit model. The authors examined the relationship between Wald and Lagrange Multiplier test statistics and give two related examples.     

秦皇岛主导产业群的选择及优化——基于投入产出表

城市主导产业是区域经济发展的主要源泉,是区域产业现代化的航标。以2002年秦皇岛市投入产出表为基础,根据主导产业的选择基准,建立反映产业发展综合能力的指标体系,经过筛选、综合评定再到后续分析的过程,最终确定出“十五”期间秦皇岛市的主导产业群,并对主导产业群的优化提出对策。     

σ值和DPMO值转换表的质疑、修正与解读

文章从理论上探讨了σ值和DPMO值之间的转换关系,修正了现有的一些书中σ值和DPMO值转换表中的问题,从实践的角度解读了σ值和DPMO值之间的关系。     

具有中国特色网球竞技人才培养机制的探讨

本文运用文献资料法、专家访谈法和数理统计法,透过李娜成功的现象,分析国内外网球竞技人才培养模式的现状,探讨我国网球职业化进程中"举国体制"的人才培养模式与网球职业化的冲突,探索具有中国特色网球竞技人才培养机制。研究表明:"举国体制"培养模式在培养目标、管理方式和投入机制上与职业化产生冲突;我国网球竞技人才培养呈现以政府、企业、个人为投资主体多元化的发展趋势。     

沙盘模拟在物流管理专业教学实践中的应用研究

针对当前物流管理专业人才培养存在的问题,把物流沙盘引入到实践性教学环节,阐述沙盘模拟在物流管理专业教学中的应用,介绍了教学内容、教学方法,并提出相应的课程考核方法。实践表明,物流沙盘有助于学生加深对物流系统的理解,提高学习兴趣,增强教学效果,为物流管理专业人才培养提供新思路。     

基于互联网开放平台的物流企业经营沙盘赛练模式研究

提出在教育主管部门、院校与开发企业的“政校企”三方合作下,通过互联网技术构建物流企业经营沙盘联网赛练平台,然后从设计思路,实施机制等方面对传统物流企业经营沙盘进行改进和创新。     

探析乒乓球比赛中节奏变化的影响因素

节奏是乒乓球比赛中的灵魂,也是技战术合理实施的集中表现。本文运用文献资料法、录像观察法等方法,通过对运动员在比赛节奏中的技术、战术、心理等因素的深入分析,总结出影响乒乓球比赛节奏变化的主要因素并提出提高节奏控制水平的建议,为进一步提高临场比赛能力提供理论依据。