Semiparametric regression of clustered current status data

This paper discusses regression analysis of clustered current status data under semiparametric additive hazards models. In particular, we consider the situation when cluster sizes can be informative about correlated failure times from the same cluster. To address the problem, we present estimating equation-based estimation procedures and establish asymptotic properties of the resulting estimates. Finite sample performance of the proposed method is assessed through an extensive simulation study, which indicates the procedure works well. The method is applied to a motivating data set from a lung tumorigenicity study.     

工业取用水监测奇异数据挖掘与重构方法

提高工业取用水监测数据质量是目前国家水资源监控能力建设的重要内容,而奇异值问题已成为影响监测数据质量的关键短板。本文在解析现阶段工业取用水监测数据奇异值主要类型基础上,以国家水资源管理系统数据库中工业取用水监测数据为样本,利用小波变换模极大值模型提取工业取用水监测数据时频变化特征,并利用傅里叶函数对其残差序列进行修正,进而运用相对误差控制方法挖掘监测数据奇异值。在此基础上,采用混沌粒子群优化的最小二乘支持向量机模型重构填补奇异值数据。研究结果表明：小波变换模极大值模型能够较好地提取工业取用水监测数据序列的时频变化特征,但是同时容易导致监测数据的信息损失,利用傅里叶函数对小波变换进行残差修正则可进一步提升取用水监测数据序列的特征提取效果;以小波变换模极大值特征序列为基础,通过相对误差控制可实现对监测数据奇异值的高效挖掘;对于挖掘出的奇异值重构填补问题,可选取混沌粒子群优化的最小二乘支持向量机模型,其重构精度要优于多项式曲线拟合等传统统计学方法和普通最小二乘支持向量机模型。上述工业取用水监测数据奇异值挖掘重构策略为现阶段国家水资源监控能力建设的推进提供了重要技术方法支持。     

Impact of mindful self-care and perceived stress on the health related quality of life among young-adult students in West Virginia

ABSTRACT

There are substantial gaps in research on Health Related Quality of Life (HRQoL) in students aged 18 and above in West Virginia. The purpose of this study is to explore the associations between mindful self-care, perceived stress, and the HRQoL in this population. We conducted a cross-sectional study between March and April 2017. We included participants who were students, aged 18 years and above, living in West Virginia and were able to answer online questions in English. Data was obtained from an online survey using a structured questionnaire, including the SF12v2®, mindful self-care scale- SHORT, and Perceived Stress Scale (PSS)-10. We applied linear regressions to determine the predictors of HRQoL (physical health and mental health) using SF12v2®. 194 participants met the inclusion criteria of the study. Mindful self-care was negatively associated with perceived stress. Better mindful self-care mediated the relationship between perceived stress and psychological well-being, controlling for gender, age, race, marital status, education level, annual household income, and chronic disease status. Perceived stress and mindful self-care were not related to the physical well-being. Better mindful self-care may safeguard against perceived stress among students aged 18 years and above. Our findings in this study recommend more mindfulness-based interventions targeted to this subpopulation to improve psychological well-being.     

Data‐Driven Supply Chain Orientation and Financial Performance: The Moderating Effect of Innovation‐Focused Complementary Assets

Drawing on the complementary assets framework, this study explores the moderating effect of innovation‐focused complementary assets (CA‐I) on the relationship between a data‐driven supply chain orientation (DDSCO) and firm financial performance. To test the moderating effect, survey data gathered from 329 manufacturing firms in China were analysed using a moderated regression analysis. The results indicate that DDSCO has a significant positive effect on financial performance, and that capabilities for product and process innovation function as complementary assets moderating the DDSCO–performance relationship. The findings suggest that innovation‐focused complementary assets are performance differentiators when paired with a DDSCO and explain why some firms obtain financial benefits from the development of a DDSCO while others do not. Specifically, competitive advantage from a DDSCO may not be realized unless CA‐I and potentially other complementary assets are harnessed, thus providing useful practical guidance to managers. Hence, the study provides empirical support for the complementary assets framework.     

中西人文教育和科学教育的历史嬗变及启示

中西传统教育思想对人文教育和科学教育的重视程度是不同的,其形成的原因也是多方面的.文章拟从中西对人、自然和社会关系的不同认识方面,分析比较两种教育思想观念的历史成因及其偏失,以期促进科学教育和人文教育的融合,对人的全面发展有所裨益.     

析体育生活对大学生社会化发展的影响

文章分析了处于青春期的大学生在社会化过程中的个体心理和社会心理的需要以及社会对大学生发展的要求,指出大学生的社会化发展是个体内在需要和社会环境影响辩证统一发展的结果.体育生活是大学生社会化发展所需的重要的社会环境和主要内容,对大学生的社会化发展有着非常重要的意义.     

试论公司契约理论在我国新《公司法》中的体现

公司是由当事人之间的契约组成的,在对公司进行法律规范的时候,应当让契约自由精神贯穿始终。我国2005年新修订的《公司法》蕴涵了公司契约理论,这一理论在我国《公司法》中得以体现具有重要意义。     

文化形象与城市发展——关于塑造重庆历史文化名城形象的思考

近年来 ,随着知识经济的到来 ,经济、文化一体化的发展趋势更加凸现。重庆是一座著名的历史文化名城 ,如何发掘、保护、开发、利用丰富的文化资源 ,塑造良好的城市文化形象 ,使之在提高重庆综合竞争中发挥重要作用的问题 ,似应引起社会各界更加广泛的重视。为此 ,从问题的提出、悠久的发展历史与深厚的文化内涵、塑造“历史文化名城”形象的思考与对策等三个方面进行了论述     

延安时期毛泽东对鲁迅形象的建构

鲁迅逝世后,毛泽东在延安多次公开评价鲁迅,成功地塑造了延安的鲁迅形象,并使之在新民主主义革命意识形态的建构中发挥了重要作用,成为延安知识分子乃至中国革命文化的重要精神符号。     

论社会主义市场经济条件下的按生产要素分配原则

建立社会主义市场经济体制的重要举措之一就是分配制度的改革。党的十五大提出的将按劳分配与按生产要素分配结合起来 ,坚持按劳分配为主体 ,多种分配方式并存的制度 ,这是对马克思主义分配理论的具体运用和创造性发展。社会主义按要素分配的内涵与资本主义按要素分配的内涵有着本质的区别。它与社会主义按劳分配的原则有着密切关系 ,是对社会主义市场经济条件下分配形式的补充