An optimal online algorithm for the parallel-batch scheduling with job processing time compatibilities

We consider the online (over time) scheduling on a single unbounded parallel-batch machine with job processing time compatibilities to minimize makespan. In the problem, a constant \(\alpha >0\) is given in advance. Each job \(J_{j}\) has a normal processing time \(p_j\). Two jobs \(J_i\) and \(J_j\) are compatible if \(\max \{p_i, p_j\} \le (1+\alpha )\cdot \min \{p_i, p_j\}\). In the problem, mutually compatible jobs can form a batch being processed on the machine. The processing time of a batch is equal to the maximum normal processing time of the jobs in this batch. For this problem, we provide an optimal online algorithm with a competitive ratio of \(1+\beta _\alpha \), where \(\beta _\alpha \) is the positive root of the equation \((1+\alpha )x^{2}+\alpha x=1+\alpha \).     

SOR视角下组织学习对组织创新绩效的影响

Ｒ2 是最近十几年迅速发展的一个研究课题,其研究取向从纯粹的计量经济学符号演变为股价同步性特征变量,并与公司特质信息含量联系起来,赋予了全新的内涵． 学者们通过跨学科的交叉与融合,从法与金融理论、委托代理理论、信息不对称理论、公司治理理论等视角对Ｒ2 背后的生成机制、作用渠道和影响后果展开富有成效的研究． 本文首先梳理从资产定价模型到 Ｒ2 ,再从 Ｒ2 到股价同步性中间的学理关系和因果顺承,接着回顾了关于 Ｒ2 形成机理与经济后果的相关讨论,然后对Ｒ2 的学术争论进行总结和评述,最后就Ｒ2 的溯源问题、以及文化与政治潜在影响对未来 Ｒ2 研究提出展望．     

基于格兰杰因果关系检验的ISM改进与应用

文章提出了一种基于格兰杰因果关系检验的解释结构模型(ISM)改进方法,该方法能依据客观统计数据识别影响因素的两两关系,进而改善了原有模型中采用专家评价法确定邻接矩阵的主观性困境.通过对物流与经济协同发展水平的影响因素分析,实证检验了解释结构模型改进方法的可行性.     

Joint modeling of longitudinal and survival data with the Cox model and two-phase sampling

A common objective of cohort studies and clinical trials is to assess time-varying longitudinal continuous biomarkers as correlates of the instantaneous hazard of a study endpoint. We consider the setting where the biomarkers are measured in a designed sub-sample (i.e., case-cohort or two-phase sampling design), as is normative for prevention trials. We address this problem via joint models, with underlying biomarker trajectories characterized by a random effects model and their relationship with instantaneous risk characterized by a Cox model. For estimation and inference we extend the conditional score method of Tsiatis and Davidian (Biometrika 88(2):447–458, 2001) to accommodate the two-phase biomarker sampling design using augmented inverse probability weighting with nonparametric kernel regression. We present theoretical properties of the proposed estimators and finite-sample properties derived through simulations, and illustrate the methods with application to the AIDS Clinical Trials Group 175 antiretroviral therapy trial. We discuss how the methods are useful for evaluating a Prentice surrogate endpoint, mediation, and for generating hypotheses about biological mechanisms of treatment efficacy.     

我国统一基本养老保险制度建立时点研究

众所周知,与城乡二元的社会经济结构相对应,几十年来,我国的城市和乡村实行的是两套相对独立、待遇迥异的"二元"养老保障体系[1].随着社会主义市场经济的发展、城市化率的提高、城乡融合的推进,二元的城乡养老保障体系与社会发展要求不相适应的矛盾日益显现,因此,如何统筹城乡养老保障,最终建立城乡统一的社会养老保障体系的问题,引起了政府、学者和社会各界的高度关注.     

论科学发展观的根本属性

科学发展观的基本定义应该是:指导人类社会发展进步的世界观和方法论.其根本属性在于其实践指导性,在于其正确的哲学理论对实践的指导意义.落实科学发展观与构建和谐社会不能平列或并列.     

论译者的主体性——以Crowley的《道德经》英译本为例

本文试从译者的主体性角度,通过对中国先秦老子《道德经》的AleisterCrowley英译本的讨论。     

宋明史学之比较

从修史机构、史学家和史学成就等方面对宋明两朝史学进行比较,论证中国封建史学宋盛明衰。     

非英语专业本科生英语学习动机实证研究及启示

以问卷的形式对赣南师范学院150名非英语专业本科生的英语学习动机进行全面的调查分析。在分析各种调查数据的基础上,找出问题所在,探讨如何进一步提高大学英语的教学水平。     

公共政策的公平之度:权利平等与特殊保护

与平等不同,公平不是一把单一的尺度,而是对各种平等尺度的权衡。公平所要平衡的最为核心的关系,是权利平等与特殊保护之间的关系。这两种对立要求在经济、社会、政治和文化领域中以各种不同方式表现出来。中国公共政策的公平理念,经历了一个否定之否定的嬗变过程。把握二者关系的公平之度,要遵循边际贡献原则、针对性原则、适度性原则和合作性原则。