For the Love of Art? Episodic Volunteering at Cultural Events

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Although episodic volunteering is a popular form of volunteering and has received increasing attention from researchers,...     

Conditional screening for ultra-high dimensional covariates with survival outcomes

Identifying important biomarkers that are predictive for cancer patients’ prognosis is key in gaining better insights into the biological influences on the disease and has become a critical component of precision medicine. The emergence of large-scale biomedical survival studies, which typically involve excessive number of biomarkers, has brought high demand in designing efficient screening tools for selecting predictive biomarkers. The vast amount of biomarkers defies any existing variable selection methods via regularization. The recently developed variable screening methods, though powerful in many practical setting, fail to incorporate prior information on the importance of each biomarker and are less powerful in detecting marginally weak while jointly important signals. We propose a new conditional screening method for survival outcome data by computing the marginal contribution of each biomarker given priorily known biological information. This is based on the premise that some biomarkers are known to be associated with disease outcomes a priori. Our method possesses sure screening properties and a vanishing false selection rate. The utility of the proposal is further confirmed with extensive simulation studies and analysis of a diffuse large B-cell lymphoma dataset. We are pleased to dedicate this work to Jack Kalbfleisch, who has made instrumental contributions to the development of modern methods of analyzing survival data.     

马克思恩格斯早期对马克思主义伦理思想归宿的探析--1844年1月至8月

文章通过对1844年1月至8月马克思恩格斯著作的分析,认为他们在对人的本质进行论述的基础上,通过对异化劳动的阐述,共同寻找到了马克思主义伦理思想的归宿——共产主义。     

互联网环境下的理论发展与创新——2014“中国·实践·管理”论坛观点综述

2014“中国·实践·管理”论坛以“互联网思维与企业管理创新”为主题,通过主题报告、分论坛以及企业家论坛,深入探讨了新时期下中国企业管理实践中的科学问题及中国本土化理论的创新与发展.论坛再次强调了“直面中国管理实践”的紧迫性,探索了构建中国本土化理论的方式方法,分享了互联网情境下的企业转型和创新问题.通过学术界与企业界的深入交流,推动了实践导向的管理研究.     

影响我国银行业效率因素的实证研究

运用DEA模型测算了商业银行技术效率、纯技术效率和规模效率,并进行了多元回归分析,得出影响我国银行业效率(1993年～1998年)的主要因素银行资产质量、人力资本、经营管理能力、产权结构、市场竞争程度等。     

应用视角的IT与业务融合规律研究

企业层面的工业化与信息化融合主要体现为IT与业务的融合。本文以185家企业的实地调查为基础,从企业IT应用视角探讨IT与业务的融合规律。结果表明,企业IT与业务融合一方面呈现出从基础层面转向业务层面,再转向战略层面的融合路径;另一方面呈现出从不平衡到逐步平衡的收敛趋势。同时,本文通过对企业在不同IT应用等级中面临的主要障碍和应用重点的变化趋势分析,进一步深化IT与业务融合规律的研究。最后,基于研究结果对企业IT与业务融合提出相应的管理建议。     

基于DSP的液压变量泵数据采集系统设计

液压泵瞬态特性的测量控制直接关系到液压传动系统的控制性能，基于DSP芯片嵌入式系统能够满足对液压泵工作特性参量的实时采集和信号处理的需求。论文分析设计了基于DSP芯片的液压泵（压力、扭矩、转速）的采集硬件模块和外围电路，编制系统各功能模块的测试软件。经实际运行，证明该系统能够对液压试验台的各个参数进行准确的采集。