Systematic modeling and model handling for manpower planning systems

The primary purpose of this paper is to show an efficient way of handling models and model data in a decision support system, in which it is usual to consider several variants of a model. The model data primarily consist of model-defining data, but the same approach may be used for the generated results as well. By efficient handling is meant the handling by the computer as well as by the user. For the user it is particularly important that new models can be conveniently defined as variants of existing models. The approach is introduced within the context of a decision support system for manpower planning based on Markov models. In the mean time the same approach has been used for the implementation of other decision support systems and has been found to be more generally applicable.     

基于XML菜谱可定制的Android点菜系统的设计与实现

对Android餐饮点菜系统设计可定制的端菜谱设计,餐厅操作员可以可视化的菜谱设计界面直观拖曳控件生成An-droid端的菜谱布局,可设置相应的组件属性、文字样式以及动作参数等,并保存为XML结构的布局文件。 Android端通过下载解析该布局XML文件生成匹配的Android组件,从而大大缩短平板设备菜谱更新的周期以及降低开发成本。     

Adhesion-Delamination Mechanics of a Prestressed Circular Film Adhered onto a Rigid Substrate

A thin circular film clamped at the periphery is adhered to the planar surface of a rigid cylindrical punch. An external tensile load is applied to the punch, causing the film to delaminate from the substrate and the circular contact edge to contract. The film spontaneously separates from the punch, or pulls off, when the contact radius reduces to a range between 0.1758 and 0.3651 of the film radius, depending on the magnitude of the residual membrane stress. The mechanical delamination process is derived by a thermodynamic energy balance based on a coupled interfacial adhesion and residual membrane stress. The theoretical model has significant implications in nanoforce measurement, microelectromechanical systems (MEMS) comprising active moveable films, and biological cell adhesion.     

EPC干砂造型工艺分析

干砂、加砂方法、砂箱、模型及模型族、振动、负压等因素对消失模铸造都有不同程度的影响，合理地控制这些因素对稳定铸造工艺及提高铸件质量是非常重要的。     

Infrared thermography for inspecting the adhesion integrity of plastic welded joints

This work aim at developing a non-destructive tool for the evaluation of bonded plastic joints. The paper examines infrared thermographic transmission and reflection mode imaging and validates the feasibility of the thermal NDT approach for this application. Results demonstrate good estimation performance for adhesion integrity, uniformity and bond strength using a transmission mode application of infrared thermography. In addition, results from a pulsed infrared thermographic application using a modified dynamic infrared tomography scheme show good performance for estimating adhesion layer thickness mapping and detecting delaminations.     

拉力芯棒在二辊斜轧延伸中的应用

介绍了在二辊斜轧延伸中采用拉力芯棒轧制的新工艺。探讨了拉力芯棒轧制与固定芯棒轧制、浮动芯棒轧制和限动芯棒轧制相比所显示的优越性。实践表明，采用拉力芯棒轧制方式，可以轧制薄壁管，提高产品尺寸精度和内表面质量。     

MPEG-7标准及其Pull和Push应用的对比分析

通信与网络技术的飞速发展使得多媒体信息日益增长,传统的基于关键字的检索方式无法满足人们的需要,MPEG-7标准的推出使这一情况出现了转机.文章介绍了MPEG-7标准的主要内容,并对该标准的Pull和Push两类主要应用进行了对比分析,指出了它们的应用领域以及使用时应注意的问题.     

An evolutionary approach to select a pull system among Kanban, Conwip and Hybrid

This paper describes a methodology for the choice of a pull production-control strategy. The methodology is based on optimization, using an Evolutionary Algorithm and discrete-event simulation, of a generic system that can model Kanban, Conwip, and Hybrid. This approach is illustrated through the examples of production lines with six, eight, and ten stages. The optimization procedure leads to a simplified Hybrid system.     

主动信息服务及其系统设计研究

信息系统是一种人机系统,计算机系统作为服务提供者应该提高其主动服务的自动化程度,即机器的主动工作能力—主动可用性。文章引入主动度、兴趣度等概念评价系统的性能指标,同时介绍了智能化的方法与技术进行主动信息服务系统的设计和实现。     

Arrival first queueing networks with applications in kanban production systems

In this paper, we introduce a new class of queueing networks called arrival first networks. We characterise its transition rates and derive the relationship between arrival rules, linear partial balance equations, and product form stationary distributions. This model is motivated by production systems operating under a kanban protocol. In contrast with the conventional departure first networks, where a transition is initiated by service completion of items at the originating nodes that are subsequently routed to the destination nodes (push system), in an arrival first network a transition is initiated by the destination nodes of the items and subsequently those items are processed at and removed from the originating nodes (pull system). These are similar to the push and pull systems in manufacturing systems.

Our characterisation provides necessary and sufficient conditions for the network to possess linear traffic equations, and sufficient conditions for the network to have a product form stationary distribution. We apply our results to networks operating under a kanban mechanism and characterise the rate at which items are pulled as well as the routing and blocking protocols that give rise to a product form stationary distribution.