基于第三方物流实施的延迟制造

目前针对由第三方物流企业实施的延迟制造研究很少。本文阐述了第三方物流提供的四种延迟制造服务以及该服务给第三方物流客户创造的价值。分析了第三方物流的组织方法——平台方法,也即资源共享方法。同时对第三方物流开展延迟制造业务提出了战略性建议,从而为第三方物流开展延迟制造业务提供了指南。     

TD多通道拉远系统校准方案及算法

在TD(Time Division duplex,时分双工)多通道射频拉远通信系统中,对各通道的时延、相位、幅度分别进行校准是其关键技术。本文先介绍了校准的基本原理,接着阐述了校准的流程,最后分析了相关峰的算法。该算法能校准通道之间的时延、相位和幅度误差,具有较好的性能。     

混沌扩频测控系统码跟踪性能分析

混沌信号的非周期性有助于解决距离测量中的模糊问题,使得它在测控系统中具有巨大应用吸引力。混沌扩频测控系统的码跟踪抖动,除了来源于加性噪声影响之外,还受到数字化混沌序列相关函数旁瓣随机性的影响。根据码跟踪原理与混沌码特性,给出了混沌码相关函数旁瓣随机性影响下码跟踪环路鉴相增益随机性的计算方法,分析了混沌扩频测控系统的码跟踪性能。结果表明,混沌码相关函数随机性的存在,使码鉴相增益产生随机性,它与环路稳态误差的相互作用对跟踪精度产生有限影响。分析结果可以为混沌序列在扩频测控系统中的应用提供支持与参考。     

GNSS信号多门延迟结构的多径抑制性能分析

多径干扰不具备空间相关性,难以通过差分方法消除,是影响全球导航卫星系统定位精度的关键因素之一。从接收机处理的导航信号受前端带宽限制以及近距离多径干扰更需抑制两个角度出发,提出了一种基于多门延迟(MGD)结构的多径干扰抑制方法,推导了带宽受限时MGD结构的多径误差的数学表达式,以加权和非加权多径误差包络面积最小作为目标函数,优化了该结构中早迟门系数,并以典型导航信号SinBOC(10,5)为例来说明该方法的性能。结果表明：对于SinBOC(10,5),该方法多径误差包络面积小于高分辨率相关器(HRC)方法至少15%;当前端带宽较大时,该方法对于较小和中等延迟的多径信号的抑制能力优于HRC方法。     

多变时滞中立型系统稳定性研究

本文研究了一类多时变时滞中立型系统的渐近稳定性问题。基于Lyapunov第二方法,推导出新的时滞依赖稳定性判据。所给得判据可以保证多变时滞中立型系统渐进稳定,结论以线性矩阵不等式(LMI)形式表示,便于应用。仿真结果表明本文稳定性判定准则具有较小的保守性。     

船舶桥楼值班报警系统(BNWAS)中检测系统的实现

桥楼航行值班报警系统主要用来保证船舶在航行时一直在驾驶台值班人员的控制中,保证驾驶台一直有值班人员值班,因此,及时准确地延时并进行报警就显得非常重要。     

The Impact of Brand Relationship and Attributions on Passenger Response to Service Failure

It is important for service companies to develop and maintain consistent and stable consumer loyalty. Although consumer brand relationship and attributions have been applied to various service industries, they have not been investigated in the airline industry where passenger emotions are considered critical. This study addresses the consequences of brand relationship quality, the mediating influence of emotions, and the moderating role of switching costs through structural equation modeling of data collected from passengers who had experienced flight delay. The results suggest that (1) airline relationship with passengers is an important and valuable asset, especially in the case of stability attributions, (2) negative emotions play a partial or full mediator role in the causal relationship between attributions and behavioral intentions, and (3) minimizing negative emotions is more effective than relying on switching costs for behavioral intentions. It can be concluded that the airline industry should try to manage passenger emotions more appropriately since passengers have an emotional attachment to their brands and passengers' negative emotions can be influential to repurchase intentions when service failures occur.     

The role of credit officers in the performance of micro loans

This paper proposes a structural model explicitly considering the role played by credit officers in loan performance. The credit officer's ability is decomposed into the screening and the audit stage. This model is estimated using a rich database from VivaCred – a Brazilian NGO. Results suggest that: (i) there is substantial heterogeneity among credit officers in the sample; (ii) their ability affects more the screening than the audit stage; and (iii) their estimated ability is correlated with their experience at VivaCred but not with their experience before joining the organization. Evidence suggests that a reduction in staff turnover would be beneficial to the institution.     

柔性延迟申领养老金政策视角下个人账户效益分析

文章以柔性退休延迟申领养老金政策为研究对象,从职工个人的缴费积累和养老金待遇领取两个角度对上海市柔性延迟申领养老金政策的个人账户效益进行测算评价.通过对柔性延迟申领养老金五种方案下的缴费、收益测算分析,得出如下结论:劳动者延迟申领养老金有利于个人账户的积累;延迟申领养老金有利于劳动者退休后养老金水平的提高;柔性延迟申领养老金政策通过养老金权益的调整可以起到对劳动者的激励作用.     

Optimal inter-area coordination of train rescheduling decisions

Railway dispatchers reschedule trains in real-time in order to limit the propagation of disturbances and to regulate traffic in their respective dispatching areas by minimizing the deviation from the off-line timetable. However, the decisions taken in one area may influence the quality and even the feasibility of train schedules in the other areas. Regional control centers coordinate the dispatchers’ work for multiple areas in order to regulate traffic at the global level and to avoid situations of global infeasibility. Differently from the dispatcher problem, the coordination activity of regional control centers is still underinvestigated, even if this activity is a key factor for effective traffic management.This paper studies the problem of coordinating several dispatchers with the objective of driving their behavior towards globally optimal solutions. With our model, a coordinator may impose constraints at the border of each dispatching area. Each dispatcher must then schedule trains in its area by producing a locally feasible solution compliant with the border constraints imposed by the coordinator. The problem faced by the coordinator is therefore a bilevel programming problem in which the variables controlled by the coordinator are the border constraints. We demonstrate that the coordinator problem can be solved to optimality with a branch and bound procedure. The coordination algorithm has been tested on a large real railway network in the Netherlands with busy traffic conditions. Our experimental results show that a proven optimal solution is frequently found for various network divisions within computation times compatible with real-time operations.