A relationship between a family of waiting time distributions and the asymptotic residual waiting time distribution

For a class of renewal process waiting time distributions defined herein, one may describe the distribution of asymptotic residual waiting times. The relationship between the two distributions characterizes the class, which includes the gamma distribution. Possible consequences for hypothesis testing are discussed.     

Charakterisierungen der exponential-und der geometrischen verteilung

A charecterization of the exponential distribution and of the geometrical distribution by means of independence of min (X, Y), max (0, X - Y) is given.     

Limit theorems for single server queues with mixed renewal and poisson inputs

The following queuing system is considered:Two independent recurrent input streams (streams 1 and 2) arrive at a server. It is assumed that stream 1 is of Poisson type. Three priority disciplines are studied in case that these customers have priority:head-of-the-line, preemptive-resume, and preemptive-repeat discipline. Formulas derived for the limiting distribution functions of the actual and the virtual waiting time of low priority customers and of the number of these customers in the system, by using of independences of certain random processes when the time tends to infinity.     

非平衡非均匀业务与ATM交换性能

研究了非平衡与非均匀业务对于输出缓冲型ATM交换系统性能的影响,分析表明输入业务的非平衡性对交换性能无影响,但非均匀性却有着严重的影响,计算机模拟证实了理论分析所得出的结论。     

服务等候中顾客感知的研究述评与展望

在服务传递的过程中,等候通常难以避免且对顾客的整体服务体验有直接的影响。通过对国内外相关文献的梳理,从顾客在等候过程中对时间的感知、对公平的感知、对环境的感知和对沟通的感知等几个研究视角对相关文献进行了总结和评价,分析了相关研究成果对等候环境设计、等候信息发布、等候队列管理的意义和启示。指出＂不同等候阶段的顾客感知差异＂,＂文化因素对等候感知的影响＂,＂基于感知分析的等候流程和等候设施设计＂,＂感知等候质量的内涵和作用机理＂是未来值得关注的研究方向。     

基于多目标规划算法的电梯群控系统

以提高电梯群的运行效率和服务质量为出发点,提出一种基于多目标规划调度算法的电梯群控系统。主要研究内容包括电梯群控系统的特点及要求、电梯群控系统的多目标规划算法建模过程以及电梯群控仿真系统的设计等几个方面。在电梯群控仿真系统当中,同时嵌入最小等待时间算法和多目标规划算法,进行2种算法的仿真比较,从仿真结果得出基于多目标规划调度算法的电梯群控系统具有一定的实际应用价值。     

互联网上言论自由权与版权关系之述评

《电子商务法》规定了电子商务平台针对知识产权侵权的\     

《杜伊诺哀歌》与《等待戈多》中的等待意识

等待意识是20世纪德国诗人里尔克的《杜伊诺哀歌》中的一项重要内容,但一直并未受到足够的重视。在《杜伊诺哀歌》与爱尔兰戏剧家贝克特的《等待戈多》这一关于“等待”的经典文本之间具有可比性,尤其在等待什么?等待是什么?为什么等待这三方面有深入探讨的必要。等待意识活跃于20世纪中前期的大混乱中,这是人类主体意识和使命感异常强烈和自觉的体现。     

Heavy traffic analysis of roving server networks

This article studies the heavy-traffic (HT) behavior of queueing networks with a single roving server. External customers arrive at the queues according to independent renewal processes and after completing service, a customer either leaves the system or is routed to another queue. This type of customer routing in queueing networks arises very naturally in many application areas (in production systems, computer- and communication networks, maintenance, etc.). In these networks, the single most important characteristic of the system performance is oftentimes the path time, i.e., the total time spent in the system by an arbitrary customer traversing a specific path. The current article presents the first HT asymptotic for the path-time distribution in queueing networks with a roving server under general renewal arrivals. In particular, we provide a strong conjecture for the system’s behavior under HT extending the conjecture of Coffman et al.^{[8 Coffman, Jr, E. G.; Puhalskii, A. A.; Reiman, M. I,. Polling systems with zero switchover times: A heavy-traffic averaging principle. Ann. App. Prob. 1995, 5(3), 681–719.[Crossref], [Web of Science ®] [Google Scholar],9 Coffman, Jr., E. G.; Puhalskii, A. A.; Reiman, M. I,. Polling systems in heavy-traffic: A Bessel process limit. Math. Oper. Res. 1998, 23, 257–304.[Crossref], [Web of Science ®] [Google Scholar]]} to the roving server setting of the current article. By combining this result with novel light-traffic asymptotics, we derive an approximation of the mean path time for arbitrary values of the load and renewal arrivals. This approximation is not only highly accurate for a wide range of parameter settings, but is also exact in various limiting cases.     

Waiting: integrating social and psychological perspectives in operations management

Waiting time is an important issue in service operations management because of its impact on customer satisfaction and operations capabilities. This paper examines waiting time from a social and psychological perspective. It provides a conceptual framework which identifies social and psychological factors that affect perceptions of waiting. The conceptual framework enables service managers to rethink operational issues, such as layout design, process choices, and service delivery from customers’ perceptions of waiting. Assimilation–contrast theory suggests that perceived waiting time be linked to expected waiting time and its gap leads to customers’ overall evaluation of service. A customer’s willingness to accept delay is related to the causes for delay as explained by attribution theory. Approaching waiting time from a stress management theory, this paper provides service managers with various stress-reduction mechanisms such as giving customers advance notice of expected waiting time, speeding up pre-process waiting time, and acknowledging customers’ rights to quick service. These practical suggestions can aid service managers in reducing perceived waiting time, enhancing customers’ waiting experience, and improving queue management.