Generalized Linear Factor Score Regression: A Comparison of Four Methods

Factor score regression has recently received growing interest as an alternative for structural equation modeling. However, many applications are left without guidance because of the focus on normally distributed outcomes in the literature. We perform a simulation study to examine how a selection of factor scoring methods compare when estimating regression coefficients in generalized linear factor score regression. The current study evaluates the regression method and the correlation-preserving method as well as two sum score methods in ordinary, logistic, and Poisson factor score regression. Our results show that scoring method performance can differ notably across the considered regression models. In addition, the results indicate that the choice of scoring method can substantially influence research conclusions. The regression method generally performs the best in terms of coefficient and standard error bias, accuracy, and empirical Type I error rates. Moreover, the regression method and the correlation-preserving method mostly outperform the sum score methods.     

高校图书馆劳务派遣用工现状与对策研究

劳务派遣用工是我国一种重要的补充用工形式,并在我国高校图书馆中普遍采用。本文概括了高校图书馆劳务派遣用工的基本状况,分析了这一用工形式所发挥的积极作用及存在的问题,并提出了解决这些问题、化解相关风险的方法,主要包括：杜绝违反劳动合同法规现象、减少辅助性工作岗位、压缩劳务派遣用工规模、提高劳务派遣人员工作技能、激发劳务派遣人员的工作积极性等。     

基于心理契约的高校后勤人员管理研究

文章从高校后勤管理现状入手,提出心理契约为高校后勤的和谐发展提供了全新的视角。心理契约是后勤员工与学校及学校后勤管理部门之间非正式的、隐含的、未公开说明的心理约定,它可以有效激发后勤员工的工作积极性,提高后勤的管理水平,是规章制度的重要补充。高校后勤管理人员要建立公平的竞争机制,引导后勤员工做好科学的职业生涯规划,加强与员工之间的沟通交流,激励员工积极实现自我价值,逐步构建管理者与后勤员工的心理契约。     

我国老年人身体活动及其影响因素的历时变化——基于CHARLS2011年和2018年数据的分析

基于中国健康与养老追踪调查(CHARLS)2011年和2018年的数据,利用logistic回归、平均偏效应模型以及交互模型,分析我国老年人身体活动及影响因素的历时变化。结果表明:我国老年人身体活动达标率从2011年的16.91%提升至2018年的48.65%,且同时呈现出同增长性与差异增大性;年龄、婚姻特征的影响程度增加,户籍、地域特征的影响程度减小;老年群体身体活动情况存在着明显的年龄、性别、教育以及户籍的分化。并以此提出建议:一要重视老年人身体活动不足的问题,提供有利于促进老年人身体活动的支持性环境,二要针对不同老年人群体,制定差异化的身体活动促进策略,三要根据区域地域差异化特征,进一步重视和引导城区中东部老年人的身体活动。     

牧民对草原生态补偿政策评价及其影响因素研究——以内蒙古四子王旗为例

研究牧民对草原生态补偿政策评价及影响因素可以促进政策的顺利实施与改进。在草原生态补偿政策实施一年之后,选取了内蒙古中部典型草原四子王旗,通过入户问卷调查、个人深度访谈等方法研究了牧民对该政策的评价,并利用统计分析方法对人口统计因素、生产条件以及政策等影响因素进行了分析。研究表明,大多数牧民对该政策总体评价为一般和满意,不满意的牧民比例为31%,不同年龄、性别、受教育程度以及民族满意度水平都有所差异;88%的牧民认为政府草原生态补偿发放及时,但有71%的人认为补偿标准低。通过多元有序Logistic回归分析,影响牧民总体满意度的显著因素主要有民族、补贴金额、草料支出、对补偿标准以及对发放是否及时的主观评价。因此,草原生态补偿政策需要适当调整标准,结合扶贫和社会保障政策,并进行经营体制改革和产业升级,才更有利于达到政策目标。     

基于项目法与CAE技术公差实验教学改革

为适应应用型技能型人才培养的需要,运用项目法和CAE技术对公差实验进行教学改革．实验过程中以工作过程为导向,按企业真实生产任务和检测环境来设计教学内容,应用先进的有限元分析软件ABAQUS数值模拟公差配合,获取应力分布规律及接触面压力分布状况,为公差配合设计提供参考依据,综合体现授课的技巧化,不仅开拓了学生综合性思维和整体性思维,而且增强学生的工程意识和学习兴趣．     

区域网络零售商物流配送网络规划研究

针对现代网络销售过程中配送路线规划的实际问题,充分考虑客户收货点的随机性、分布散的特点,将配送区域划分为合理的投递网点,转化为对投递点的路径优化问题,以最小化行驶里程目标,建立了物流配送路径优化模型,提出基于聚类的改进两阶段启发式算法。通过第一阶段的聚类算法,对配送网点进行划分,大幅降低问题规模,将问题转化为小规模的单车线路优化问题;第二阶段对每个分区内的投递网点,采用遗传算法求解。实验结果表明该算法能够整体上大幅降低企业配送成本。     

天津市外商投资企业后向关联影响因素分析

国内外研究表明,FDI对国内企业的技术溢出主要体现在上下游的垂直关联层面而不是水平层面,因此,如何利用FDI的后向关联推动企业创新能力的发展具有重要的理论和现实意义.对天津市外商投资企业进行问卷调查,采用Logistic回归,对影响外资企业与本地供应商建立后向关联的因素进行检验.结果显示主要影响因素有内资企业的产品质量、内资企业的信誉、东道国贸易开放程度、知识产权保护程度、投资来源地和所属行业.     

基于共生网络的废旧电子产品逆向物流运营模式构建

针对废旧电子产品中可利用资源的不同并结合共生网络的思想,构建了基于实体共生网络的废旧电子产品逆向物流运营模式和基于虚拟共生网络的废旧电子产品逆向物流运营模式,分析了其构建思路、运营机理和特点.以期为我国废旧电子产品的回收利用提供理论参考.     

Measuring the effectiveness of offensive match-play in professional soccer

Abstract

The broader measures of offensive effectiveness, such as scoring opportunities and shots at goal, are commonly used as an alternative to goals scored due to the naturally low probability of scoring (about 1%) in soccer match-play. These measures may enable soccer practitioners to objectively see behind single match results, which are often influenced by chance. The purpose of this study was to examine the relationship between broader measures (scoring opportunities and score box possessions) and the ultimate measure (goals scored) of offensive effectiveness. We analysed data from videotapes of 163 of 182 (90%) matches played in the Norwegian men's professional league during the 2004 season. Multiple logistic regression analyses showed very similar results when comparing the effectiveness of different offensive tactics, regardless of which outcome was used. For example, counterattacks were more effective than elaborate attacks in producing goals (odds ratio OR=2.07, 95% confidence interval: 1.40 to 3.05), scoring opportunities (OR=2.30, 95% confidence interval: 1.28 to 4.15), and score box possessions (OR=2.12, 95% confidence interval: 1.39 to 3.25). The receiver-operating characteristic function statistical procedure was used to examine the association between each of the three measures of offensive effectiveness: scoring opportunities, score box possessions, and goals scored. No significant difference was observed between the area under the curve (AUC) for the broader measures (scoring opportunities and score box possessions) and the ultimate measure (goals scored) of offensive effectiveness. The 95% confidence interval of the AUC for both scoring opportunities (0.74–0.84) and score box possessions (0.68–0.76) includes the AUC for goals scored (0.74). Thus, the results are very similar regardless of which outcome measure for offensive effectiveness is used. This indicates that scoring opportunities and score box possessions (shooting opportunities) can be used as a proxy for goals scored when comparing the effectiveness of different playing tactics in soccer. Compared with goals scored, using scoring opportunities or score box possessions requires smaller match samples for meaningful analyses, and may therefore be more feasible alternatives.