基于Web服务的客户定制型订单全生命周期管理支持系统

针对定制型制造企业对订单全生命周期管理业务流程快速重构的需求,构建了一种基于Web服务的定制型产品订单全生命周期管理支持系统,建立了该系统的体系结构和运行流程。研究了基于Web服务的企业应用组件库、基于Web服务组件库的业务流程配置与重用、基于Web服务流语言的订单全生命周期业务流程描述等关键技术。该系统已成功应用于重庆一客户定制型产品生产企业,取得了良好的应用效果。     

基于Windchill的产品文档全生命周期管理的研究与应用

研究文档全生命周期管理的流程,定制文档全生命周期管理的4个有效管理的阶段,并制定版本管理的规则,在Windchill软件二次开发平台的基础上进行客户化定制,并实现对该企业的产品文档全生命周期的管理,为产品文档全生命周期管理提供切实可行的方法.     

基于制造企业订单分离与合并的研究

定制生产是现代制造企业生产的模式,针对企业订单大小、品种多样化、批组化和相似性,对仃单产品进行合理的分化和组合,论述了订单分离与合并的基本理论知识,基于订单产品特点相似性、工艺相似性、销售库存相似性建立了制造企业订单分离与合并的决策模型,对订单分离点进行具体的分析和评价,从而优化订单分离点,决策优化出分离模型.通过对订单相似性进行定性分析和定量计算,合理、有效的决策出"分离点"和"合并点",实现订单的有效分离与合并,快速而有效地反应客户需要、降低企业运作成本、缩短订单提前期.     

快速响应--中小型制造企业应对订单制造的策略

随着产品生命周期的缩短,企业"零库存"生产模式的推广,订单加工已成为中小型制造企业的一种重要生产方式.在分析我国现有中小型企业面向订单制造现状的基础上,针对现代订单产品的特点,提出了一套基于快速响应的订单产品制造体系,并已部分在企业中实施.     

按订单装配型定制产品配置设计过程研究

大批量定制环境下的按订单装配型(ATO)产品配置设计是一个利用已有标准化、模块化组件快速实现客户定制产品的过程.为了详细研究ATO产品配置设计过程,在给出了ATO产品配置设计基本概念的基础上.讨论了ATO产品配置设计原理,提出了将其设计过程划分为3个阶段和5个域的方法.研究结果表明,通过该方法有利于企业更好地实现ATO产品的定制设计,更快地满足客户的个性化需求.     

制造企业产品全生命周期管理

产品全生命周期管理是将企业的扩展、经营和管理与产品的全生命周期紧密联系在一起的一种企业信息化管理理念。分析制造企业产品全生命周期管理的现状,给出产品全生命周期管理内容和作用,并阐述制造企业产品全生命周期管理的内涵,即以产品为中心,以提升创新能力为目标,以信息技术和应用软件为手段和以企业的知识型资产为重要资源。     

基于时变需求的CODP定位对客户订单满足率影响的仿真分析

从客户订单满足率的角度,对大规模定制生产方式中客户订单分离点(CODP)的定位进行了分析。使用CPN Tools工具建立了大规模定制供应链的CPN模型并进行仿真分析。通过仿真,得出了在时变需求的情况下CODP定位点的选取与制造企业客户订单满足率的关系。     

装配定制型制造企业集群物流模式及其信息化支持平台研究

在对装配定制型企业内部物流特点与现状分析的基础上,针对装配定制型制造企业集群传统物流模式存在的问题,提出一种基于物流中心的装配定制型制造企业集群物流模式,并设计了支持该模式的信息化支持平台,取得一定的效益.     

面向离散型数控车间的无纸化制造技术研究

在分析企业管理现状的基础上,结合企业信息化应用程度,提出了无纸化制造总体思路,建立了数字化管理模式,搭建了车间数字化制造集成平台,从工艺无纸化、生产管理无纸化、生产物流无纸化及三者之间的信息集成交互进行深入研究,实现产品全生命周期制造过程跟踪,最终形成产品全生命周期制造档案,通过数字化工艺设计、数字化业务管理以及集成生产现场应用,促进企业技术创新和管理提升。     

MTO环境下订单跟踪系统研究

客户定制化和代工生产企业,按照客户订单组织生产。为控制订单交货期、生产进度和产品质量,需要对订单进行系统跟踪。本文首先对订单跟踪所需的订单、制造过程、组织模型进行研究。然后在订单跟踪功能和内容研究的基础上,提出了面向离散制造、适合MTO(Make-to-Order,面向订单制造)环境下的订单跟踪系统框架,并对系统实现关键技术进行说明。最后,应用案例验证了模型、系统框架的有效性。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.