PDM在生产过程中的质量管理

介绍了产品数据管理（PDM）的定义和功能，分析了PDM与质量管理集成的必要性，建立了PDM在生产过程中质量管理子系统的信息模型和功能模型。     

基于过程方法的制造企业质量管理系统模型研究

运用过程方法对制造企业的质量管理系统展开研究,分析、探讨了质量管理过程方法的本质特点与应用原则;将质量体系的过程网络模型与制造企业质量管理业务相结合,基于过程组与过程单元构造了过程集成化的质量管理系统模型;将制造企业的质量管理体系解析、封装为产品实现过程质量管理、综合质量业务管理和质量体系管理三个过程组,对过程组的单元构成及其内外部集成机制进行了分析与描述。该模型为制造企业质量管理系统设计与规划提供了一种新思路。     

基于资源-逻辑动态耦合的生产质量管理系统过程模型

针对现代质量管理业务的过程化与柔性化需求,分析了生产质量管理业务过程,提出了一种可扩展的柔性业务过程管理模型。该模型将生产质量管理过程模型分解为路由逻辑和过程资源,路由逻辑描述质量业务活动按照既定条件和顺序执行的过程规则,过程资源描述过程执行所需要的人、数据、约束等资源信息,通过路由逻辑与过程资源之间的动态耦合实现柔性化的生产质量管理业务应用。最后,介绍了基于该过程模型所构建的具有过程柔性的生产质量管理系统及其工程应用。     

基于Intranet/Extranet/Internet的企业质量管理信息系统

随着供应链、虚拟企业等扩展企业组织模式的出现，基于企业Internet的质量管理信息系统已不能满足现代企业质量管理的需要。因此，传统的面向企业内部的质量管理模式已随着产品开发与制造过程的延伸而拓展，出现了以核心企业为中心、以扩展企业为整体的质量管理模式，企业质量管理信息系统围绕企业内部和外部运行两方面，实现质量管理的信息、功能和过程的集成。扩展企业质量管理模式研究的基础上，针对制造企业，提出了面向扩展企业的、基于Internet/Extranet/Intranet的企业质量管理信息系统，研究了系统模型和功能模型，提出了系统实现的体系结构。     

试析产品生命周期管理环境下的汽车行业全面质量管理问题

随着社会经济的发展，我国汽车行业耍想顺利进入国际市场，就要对企业自身实施全面质量管理，并由此提出了”产品生命周期管理环境下汽车行业全面质量管理方法”这一管理方法。为此，首先要以这种方法的过程要素和它的映射关系作为基础来进行分析，并提出将质量的过程朝着”工作流元模型的映射”这种数字化的方式发展。并且，要给出这个发展过程转变的模式。然后，再以上述方法为基础，提出分层式参考上述过程的管理方法，并给出产品生命周期管理环境下的汽车行业全面质量管理能够得以实现的工具框架的保证。     

面向多级供应商的航天型号产品研制过程质量管理研究

航天型号产品研制过程质量管理涉及多级产品供应商,并贯穿于型号产品的全生命周期。本文针对航天型号产品具有多级供应商的复杂性,描述了航天型号产品研制过程质量管理的概念和质量管理的特点,提出了面向多级供应商的航天型号产品过程质量管理模式,并提出了产品质量信息树（PQIT）、产品全生命周期质量信息模型（PLQIM）和质量异常特征模型（QPSM）的概念,同时结合航天型号产品的研制过程建立了包括产品质量预测方法、过程质量管理方法、质量问题追溯方法和质量分析与决策方法在内的航天型号产品研制过程质量控制方法体系。     

基于质量链管理的质量信息结构模型研究

结合质量链的概念模型和特征,分析质量在形成过程中对质量信息的需求,建立基于质量链管理的质量信息结构模型。该模型能够展现质量的形成过程、信息源和质量形成各阶段的质量信息共享和传递,反映质量形成各阶段质量信息需求的传递性和差异性,为质量链管理提供了信息支持平台。     

产品设计质量数据与管理模型研究

针对产品设计阶段有效管理质量数据的迫切需求,提出了基于质量特性的产品设计质量数据管理模型。依据产品设计过程确立了产品设计质量特性与数据的定义,在分析产品设计质量保证过程和产品质量特性多维性及演化性特点的基础上,给出了产品设计质量数据与产品质量特性的映射关系和视图,分析了产品设计质量数据的结构、特点及管理需求,提出了基于质量特性的满足产品数据管理和流程管理规范的产品设计质量数据管理模型。通过开发现代产品设计质量保证与数据管理平台原型系统和典型机械产品研制过程的质量数据管理应用,验证了该模型的正确性。     

基于品质物料清单的全面质量数字化管理模式的研究

针对全面质量管理缺乏有效实施手段的现状，构建了面向企业运作过程中所有质量活动的品质物料清单体系，分析了该体系的构成、特性、作用和必要性，并采用语义化建模技术和工程化方法，描述了品质物料清单体系各成员间的关系及其数据关系模型，最终以品质物料清单体系作为合理有效的质量数据组织形式，以确保准确的质量数据统计分析，进而实现“以数据说话”的全面质量数字化管理。     

基于PDM实现过程质量管理的持续改进

把卓越质量作为高价值的看法己成为当今市场竞争的新起点,而质量改进过程是其成功的源泉。主要讨论企业过程质量管理的含义和企业过程、项目过程、个人过程之间的关系,随之论述如何实行各过程的持续改进,并建立PDCA循环下质量改进模型,及应用PDM技术保证过程质量管理的执行,搭建面向产品设计阶段过程质量管理的PDM框架模型,指出过程质量管理的改进是一个永不中止的循环过程。     

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.