Limit theorems for reflected Ornstein–Uhlenbeck processes

This paper studies one‐dimensional Ornstein–Uhlenbeck (OU) processes, with the distinguishing feature that they are reflected on a single boundary (put at level 0) or two boundaries (put at levels 0 and d > 0). In the literature, they are referred to as reflected OU (ROU) and doubly reflected OU (DROU), respectively. For both cases, we explicitly determine the decay rates of the (transient) probability to reach a given extreme level. The methodology relies on sample‐path large deviations, so that we also identify the associated most likely paths. For DROU, we also consider the ‘idleness process’ L_t and the ‘loss process’ U_t, which are the minimal non‐decreasing processes, which make the OU process remain ≥ 0 and ≤ d, respectively. We derive central limit theorems (CLTs) for U_t and L_t, using techniques from stochastic integration and the martingale CLT.     

无边界职业生涯时代不同代际员工组织承诺的影响因素

基于无边界职业生涯的理论视角,采用问卷调查法,考察了影响新生代员工和传统代员工组织承诺的关键性因素,并通过优势分析确定其相对权重.结果表明:(1)在无边界职业生涯时代,企业员工具有较高的无边界心智模式和适度的组织流动性偏好,新生代员工的无边界心智模式显著高于传统代员工,但组织流动性偏好在不同代际之间的差异不显著.(2)组织流动性偏好显著地负向预测组织承诺,无边界心智模式对组织承诺的预测作用均不显著,组织发展性支持和感知的职业机会显著地正向预测组织承诺.(3)组织承诺影响因素的相对重要性存在代际差异,组织中的职业机会是影响新生代员工组织承诺的最重要因素,组织的发展性支持是影响传统代员工组织承诺的最重要因素.     

我国新能源汽车产业破坏性创新的政策支持研究

提高新能源汽车产业创新水平、将新能源汽车产业置于国民经济战略性新兴产业的地位予以支持已成为世界大国博弈的重要命题.文章将破坏性创新理论用于指导我国的新能源汽车产业政策,在公共科技政策分析的基本政策工具框架下,采用内容分析法分析了2009年至今我国新能源汽车产业创新的政策支持体系;对特斯拉汽车成功进行破坏性创新的案例及对我国的启示作了实证研究,进而提出我国新能源汽车产业破坏性创新的政策建议.     

中国的实际经济周期与税收政策效应

本文构建了财政税收的实际经济周期(RBC)模型,实证研究了中国宏观经济波动的周期特征及税收政策的经济效应。研究发现:(1)引入财政收支冲击的RBC模型能够解释70%以上中国经济波动的特征事实,政府支出冲击加剧中国实体经济波动,而税收冲击对经济波动的影响不显著。(2)降低劳动收入和资本收入的税率都能促进经济增长和带动资本和劳动的供给增加,降低劳动收入税率有利于促进居民消费增长,降低资本收入税率则起到抑制作用,调整劳动收入税率的政策效果更强。(3)资本收入税率与社会福利呈正相关和非对称性,劳动收入税率与社会福利呈负相关和非对称性,技术冲击和财政冲击的共同作用使得结构性税收调整政策的福利效应具有非对称性,两种税率的同向变动对社会福利具有放大作用,两者的反向变动对社会福利具有削弱作用。     

营养知识对合理膳食的必要性

人们每天都需要摄入食物,只有不断补充与提高人体所需的多种营养素,人的健康成长与生存需要才能得到合理膳食的支持。对于中国这样一个民以食为天的国度,营养知识对于合理膳食就显得更为重要。     

食品中内源性甲醛的产生机理及控制技术

甲醛属于致癌、致畸物质,添加到食品中会对食用此食品的人造成伤害。本文综述内源性甲醛在各类食品中的来源、形成机理、影响因素及其毒性控制技术。以期在食品安全生产过程中,更好地减少和控制各类食品中内源性甲醛的含量。     

How group efficacy mediates the relationship between group affect and identification

This study examines the mediating role of group efficacy on the relationship between group affect and group identification by integrating the collective cognition process. Using a sample of forty-seven work groups in Study 1, the results show that group efficacy fully mediates the relationship between positive and negative group affect and group identification. Study 2 applies a two-wave panel design to verify the impact of group efficacy on group identification. The results of Study 2 indicate that group efficacy relates positively to the development of group identification. The implications for theory and practice are discussed.     

Managerial Commitment to Sustainable Supply Chain Management Projects

Most companies are under pressure to improve the environmental sustainability of their supply chains. However, there is considerable variance in companies' ability to successfully deploy environmental management projects. One important factor, according to articles in the academic and business press, is the ability of champions of sustainable supply chain management (SCM) projects within organizations to gain the commitment of colleagues (e.g., other managers from a variety of functions) to help these projects succeed. Therefore, this paper examines variables that affect a project champion's ability to gain this commitment from colleagues. In particular, building on existing research, this research employs a video‐based experimental design to examine the effect of the influence approach that the project champion employs, the values of the person the champion is trying to influence, and the organizational climate. The results suggest that organizational climate and certain individual values directly affect commitment. There are also interactions between values and influence tactics. The research adds to the field's growing knowledge on the antecedents of sustainable SCM within companies while providing valuable guidance for environmental champions and for top managers.     

高大平房仓储粮减损增效探索

高大平房仓储粮第一年秋、冬低温季节利用小功率风机进行下行式机械通风降低基础粮温;储存稳定期在确保储存安全的前提下,进入第2年、第3年秋冬季节则采用自然通风;气温上升季节对仓房实施隔热密闭、仓顶喷淋等一系列控温措施,在低能耗的情况下,可有效控制粮温,且大大减少了因通风产生水分散失而造成的储粮损耗.经过3年的储藏,损耗率低至1.42‰,且稻谷品质达到要求,降低储粮保管费用.     

菱角壳的化学成分和药理活性研究进展

近年来对菱角壳的研究主要分为化学成分和药理活性研究两个方面,其中化学成分方面的研究可以概括为生物碱、酚酸类、萜类和甾体、多糖类、黄酮类5个方面;药理活性方面的研究可以概括为抗癌活性、抗氧化活性、降低α-葡萄糖苷酶活性、保肝护肝活性、抗菌活性5个方面。目前在化学成分方面的研究较弱,从研究结果来看,没食子酸及其衍生物是菱角壳的主要药用成分。最后就菱角壳的开发利用提出了几点建议。