后“福岛”时代我国核电项目前期策略的改进研究

文章以模型分析方法为基础,建立了以执照申请、前期设计、设备采购、现场施工准备四条主线为脉络的核电项目前期策略模型。基于对福岛事故前后外部环境条件的变化,反思了福岛事故前普遍采取的工作思路,探讨了新形势下我国核电项目的前期工作策略,明确提出核电可持续发展的基础是依法依规开展各项前期工作。     

基于平均电价的在线电动汽车充电排程定价机制

考虑在一个区域内单个充电站为多辆电动汽车(充电顾客)提供充电服务的排程与定价问题.充电顾客的排程(排序)有三种可选择的机制,即从高到低将待充电顾客按下列准则进行排序:1)顾客充电的总报价;2)顾客充电的单位报价;3)顾客在当前时间点之前已充电量的价值.基于上述充电排程机制,提出了一种基于顾客已充电量的平均电价且不依赖未来充电需求的定价机制,证明了所提出的排程定价机制具有个体理性和激励兼容特性.与已有的按顾客获得的最后一单位待充电价格进行定价的方法相比,研究发现:在第1)或第2)种排程机制下,所提出的定价机制顾客充电最终支付价格的期望相同,但方差减小;在第3)种排程机制下,所提出的定价机制顾客最终支付价格的期望和方差均减小.算例结果展示了所提出定价机制在减小充电顾客最终支付价格不确定性方面的作用与效果.     

Family Roles as Moderators of the Relationship Between Schedule Flexibility and Stress

Employer initiatives that address the spillover of work strain onto family life include flexible work schedules. This study explored the mediating role of negative work–family spillover in the relationship between schedule flexibility and employee stress and the moderating roles of gender, family workload, and single‐parent status. Data were drawn from the 2008 National Study of the Changing Workforce, a nationally representative sample of working adults (N = 2,769). The results indicated that schedule flexibility was associated with less employee stress and that these associations were mediated by perceptions of negative work–family spillover. This study found the moderating relationships of gender, family workload, and single parenting in the relationships between schedule flexibility and negative work–family spillover and stress. Schedule flexibility had stronger relationships in reducing negative work–family spillover and stress among women, single parents, and employees with heavier family workloads. The findings provide empirical support for intervention efforts involving schedule flexibility to reduce workplace stress among employees with family responsibilities.     

The surprising effectiveness of earliest operation due-date sequencing

In make-to order production, schedule reliability is very important but still not sufficiently accomplished in industrial practice by the vast majority of companies. It has been known for long that processing the orders at a workstation in the order of their operation due-dates can compensate for lateness in the arrival at the workstation within certain boundaries. The paper analyses the effectiveness of earliest operation due date (EODD) sequencing by comparing it to an optimistic theoretical boundary. The surprising result is that EODD can nearly fully exploit the theoretical potential. It should therefore be used in practice whenever schedule reliability is important, with only few exceptions. Its effectiveness though is increasing with the workstation’s WIP level and thus is in conflict with the objective to reduce WIP levels and throughput times. A simple forecasting model allows to assess the extent to which lateness can be compensated by EODD sequencing and which schedule compliance can be achieved.     

Increasing Vocal Variability in Children with Autism Using a Lag Schedule of Reinforcement

Variability has been demonstrated to be an operant dimension of behavior (Neuringer, 2002; Page & Neuringer, 1985). Recently, lag schedules have been used to demonstrate operant variability of verbal behavior in persons with a diagnosis of autism (e.g., Lee, McComas, & Jawor, 2002). The current study evaluated the effects of a Lag 1 schedule on the vocal variability of 2 nonverbal children with a diagnosis of autism. Results showed systematic increases in variability during the Lag 1 schedule. Implications of lag schedules for speech and language training are discussed.     

A two phases queueing system with Bernoulli vacation schedule under multiple vacation policy

This paper deals with a single server Poisson arrival queue with two phases of heterogeneous service along with a Bernoulli schedule vacation model, where after two successive phases service the server either goes for a vacation with probability p (0≤p≤1) or may continue to serve the next unit, if any, with probability q(=1−p). Further the concept of multiple vacation policy is also introduced here. We obtained the queue size distributions at a departure epoch and at a random epoch, Laplace Stieltjes Transform of the waiting time distribution and busy period distribution along with some mean performance measures. Finally we discuss some statistical inference related issues.     

班轮运输服务中的时间因素

从航运公司的角度评价与班轮船期表有关的时间因素的协调措施,分析船期不可靠性的原因,并广泛讨论班轮公司用来增强船期可靠性的一系列措施和工具。     

科学合理排课,稳定教学秩序,提高教学质量

科学合理编排课程表,是学校建立稳定教学秩序的基本保证,是一项基本而又重要的教学管理工作。熟悉和掌握全校教学资源及教学计划是科学合理编排课程表的前提。课程表的编排应体现以教师和学生为本,效率优先,注意效益的原则。其基本要点是严格执行教学计划,准确落实教学任务,确立良好的排课顺序,做好课程表初排后的检查和调整。     

基于关键链的项目工期风险断链式控制研究

以关键链为物质载体的风险效应的传递在外界环境的作用下，具有一定的扩增性。本文在关键链的基础上，从风险效应链式形态出发，通过对项目工期风险链式传递机理的分析，识别项目关键链上的关键工期风险结点，针对性的将关键链管理中的项目缓冲分解到关键结点之后，有效抑制其关键结点的传递途径，从而达到断链的效果，减少破坏的扩增性，达到风险控制的目的，从而提高项目管理的效率。     

The analysis of age-specific fertility patterns via logistic models

In this paper, we introduce logistic models to analyse fertility curves. The models are formulated as linear models of the log odds of fertility and are defined in terms of parameters that are interpreted as measures of level, location and shape of the fertility schedule. This parameterization is useful for the evaluation, and interpretation of fertility trends and projections of future period fertility. For a series of years, the proposed models admit a state-space formulation that allows a coherent joint estimation of parameters and forecasting. The main features of the models compared with other alternatives are the functional simplicity, the flexibility, and the interpretability of the parameters. These and other features are analysed in this paper using examples and theoretical results. Data from different countries are analysed, and to validate the logistic approach, we compare the goodness of fit of the new model against well-known alternatives; the analysis gives superior results in most developed countries.