A review on strong convergence of weighted sums of random elements based on Wasserstein metrics

In a previous paper the authors proposed a simple method to extend results about almost sure convergence for weighted sums of real random variables to the case of Banach-valued random elements. The method arises from the extension of Skorohod's Representation Theorem for weakly convergent sequences due to Blackwell and Dubins, applied to the general framework of weakly equivalent tight sequences of probability measures. This provides a scheme which permits us to handle separately a problem that behaves like the Glivenko-Cantelli Theorem and a question on uniform integrability which generally is reduced to the real valued version of the general problem to be solved.

In this paper we prove that Wasserstein's metrics can play the same role as Skorohod's Representation Theorem in the preceding scheme. We also show that our method can be applied to obtain results with respect to various summability methods (Abel, Euler, …) even in the case in which the ‘weights’ are linear operators.     

关于Ismail-May算子线性组合的同时逼近

本文推广了的结果,主要研究了一类Ismail-May算子线性组合的同时逼近问题,在一致通近意义下,给出了逼近的正定理、逆定理及非最优逼近阶的特征刻划.     

电信运营商营销控制模式的应用研究

根据营销业绩目标的可量化程度和营销活动过程的透明度,将我国电信运营商的营销控制模式分为结果控制模式、过程控制模式、自我控制模式和他人控制模式,并结合企业实际情况对各个控制模式的具体内容和适用条件进行了详细说明,旨在改善我国电信运营商的营销管理工作,提高营销绩效。     

论社交网络服务经营者的法律风险防范

现实的人际关系网被移植到互联网世界中后,人际关系网的内容和活动方式都有了新的变化,但同时也产生了新的法律风险,如服务合同法律风险、广告经营法律风险、网络游戏法律风险、注册用户个人信息保护法律风险及著作权侵权的法律风险等等。社交网络服务经营者应该对运营中的各项法律风险有所意识并加以有效防范,社交网络服务才能健康发展。     

基于VIKOR和诱导广义直觉梯形模糊Choquet积分算子的多属性群决策方法

针对属性值为直觉梯形模糊数,决策者间和属性间存在相互关联的多属性群决策问题,引入模糊测度和Choquet积分的概念,在直觉梯形模糊数的运算法则基础上构建了诱导型广义直觉梯形模糊choquet积分平均(IG-ITFCA)算子和诱导型广义直觉梯形模糊choquet积分几何(IG-ITFCG)算子,探讨上述算子的若干性质及一些特例,进而提出了基于诱导型广义直觉梯形模糊Choquet积分算子和多准则妥协优化解(VIKOR)的直觉梯形模糊多属性群决策方法。实例分析验证该方法的有效性和合理性。     

基于Newsboy及多个竞争网商的订货模型建构

以需求受价格和广告投入影响的Newsboy问题为研究对象,结合网络环境,建立了不确定环境下多个竞争网商进行最优定价、广告投入和订货量的联合确定模型,指出该模型存在唯一的纳什均衡解。最后给出案例进行数值解法演示,以模型建构和应用来优化网商订货策略,帮助网商订货、定价、广告和库存管理决策。     

运营商与SP合作关系的系统动力学仿真研究

运营商与服务提供商（SP）的竞合关系一直是各方关注的重点问题,以移动增值业务产业链为研究对象,对SP和运营商的业务收入影响因素进行分析的同时,使用系统动力学进行仿真分析。通过对各影响因素调整,找到最优的合作模式,以实现整个产业链利润最大化。     

关于反垄断民事责任的若干思考

反垄断民事责任的承担涉及到主体、行为、方式等方面的问题。理论上说反垄断民事责任的承担主体应为实施了垄断行为的任何＂人＂,但在实际承担责任时并非如此,许多主体特别是具体实施了垄断行为的企业内部人员、行业协会、滥用行政权力的行政机构及其法律、法规授权的具有管理公共事务职能的组织等通常不能作为独立的民事责任主体。由于垄断协议以及经营者集中等行为具有不同性质,其民事责任的承担也会有所差别。反垄断民事责任的承担在一定情形下需要考虑反垄断机构的前期行为,责任的具体认定也有别于一般民事责任。民事责任承担的方式主要是停止或消除垄断行为以及赔偿损失。     

Job stress,burnout and substance use among urban transit operators: The potential mediating role of coping behaviour

Abstract

Urban transit operators, compared to other occupational groups, have higher rates of mortality and morbidity. A major risk factor is the highly stressful objective environment. This study used structural equation modelling to test a model hypothesizing that transit operators’ coping behaviours in responding to daily job hassles mediate the associations of work stress with burnout and substance use. The study sample consisted of 1231 transit operators who participated in the San Francisco MUNI Health and Safety Study. The results showed a direct and strong association between transit operators’ daily job stress and symptoms of occupational burnout even when a series of controls and coping behaviours were considered. In addition, use of “disengage-deny” and escapist strategies to cope with job stress was positively associated with burnout; the job stress–burnout association was partially mediated through such coping practices. Daily job stress was related to substance use only indirectly and mediated through burnout and use of “disengage-deny” and escapist coping strategies. “Disengage-deny” coping strategies might help reduce substance use whereas escapist coping strategies might increase such use. Overall, our findings suggest that coping behaviour may be an important correlate of transit operators’ ill health. Interventions enabling healthy coping behaviours may help reduce health risks for this occupational group.