一种高性能的分布式工作流系统实现框架

针对现有工作流系统的缺点和企业的实际需求，提出了一种基于COM 技术的分布式工作流系统实现框架。通过多层结构的方式，实现了工作流系统中应用、逻辑与数据的分离。分析了系统在可靠性、可扩展性与实用性等方面的性能，并给出了相应的实现策略。实际应用初步证明了基于该框架实现的工作流系统适合于企业业务过程管理。     

基于工作流与XML的敏捷供应链管理系统集成框架研究

供应链系统敏捷化的关键是实现其商务系统的重构和业务过程的重组,以及企业交互过程的标准化。针对这些问题,本文提出了一个基于工作流和XML的敏捷供应链管理系统集成框架,它利用工作流作为企业内部商业过程建模、商业过程处理与监控的工具,以XML作为企业之间互操作信息的编码语言,以Internet,Web,Agent等作为企业信息交互的基础设施,从而满足供应链管理的要求。同时介绍了企业之间交互的形式与内容,以及正在制定的Internet上企业交易规范。最后通过采购实例详细描述了在该系统模式下企业之间的交互过程。     

基于Ontology和工作流的主动式应用服务系统

针对企业人员如何提高利用应用服务的效率问题,提出了基于Ontology和工作流的主动式应用服务系统框架.首先利用Ontology实现对目前无语义Web服务的集成,同时提出了服务组件的概念.然后结合工作流技术,建立了基于业务过程的应用服务需求元模型,实现了服务的主动推送.最后给出了一个应用实例.     

面向敏捷供应链的柔性企业资源计划研究

企业资源计划系统刚性太强，是其实施成功率较低的一个重要原因。为提高该系统的柔性，支持业务系统随企业业务变动而适应性演进，提出了一个基于集成化建模技术与Web Services技术的、以工作流管理系统为核心的柔性企业资源计划框架，以开放性、集成性、适应性和面向整个供应链为系统目标。该框架基于模型驱动的思想，将具备一致性的企业模型映射为不同层次的Web Services规范，对应到信息系统的数据层、业务基础件和业务过程等不同应用层次。基于Web Services规范流程描述语言的工作流系统和统一描述、发现和集成协议注册仓是实现整个系统整合和柔性演进的核心。     

产品数据管理与企业资源计划系统间更改信息的集成与控制

提出了一种产品数据管理与企业资源计划系统间通用的更改信息描述方案与集成方法,以及基于工作流技术的更改信息控制策略。将产品数据管理与企业资源计划系统间集成的更改信息归纳为对象、层次结构和文档三类基本形式,形成了通用的更改信息表达方案。基于中性数据环境,实现了更改增值信息的共享与集成。将更改过程的相关信息划分为变更对象、更新对象和辅助对象,并利用工作流技术完成了过程间的推送、跟踪与信息发布,实现了对更改过程的控制,保持了更改产生的新版信息与原版信息之间的关联升级与关联继承性。通过实际的产品数据管理与企业资源计划系统中的实施与应用,实现了更改信息集成和控制方案,为产品数据管理与企业资源计划系统间更改信息集成与控制的研究应用提供了一条有效的解决方案。     

基于Ontology和工作流的主动式应用服务系统

针对企业人员如何提高利用应用服务的效率问题,提出了基于Ontology和工作流的主动式应用服务系统框架.首先利用Ontology实现对目前无语义Web服务的集成,同时提出了服务组件的概念.然后结合工作流技术,建立了基于业务过程的应用服务需求元模型,实现了服务的主动推送.最后给出了一个应用实例.     

基于过程控制的设计更改控制系统研究

针对航空制造企业的特点,利用工作流技术,提出了一种基于过程控制的设计更改控制系统的体系结构,采用面向对象的Rational统一过程方法对业务过程进行分解和离散化,从中抽取基于业务角色的、粒度合适的过程元模型,将其开发成符合工作流管理联盟接口规范的软件组件,并以此构建相应的工作流模型。用该体系结构所开发的飞机制造设计更改控制系统,实现了信息集成、过程集成、过程控制、过程分析和系统柔性。     

虚拟企业供应链工作流模型的研究与实现

采用扩展的Petri网作建模工具,将活动分到每个角色,基于角色建立虚拟企业中电子商务的工作流模型。该模型在概念层上比较容易表示各伙伴企业的实现业务目标过程中的动态行为;在物理实现时比较基于分布对象体系结构实现对象的即插即用。系统建立在CORBA Web/Intranet平台上,原型系统可以按图形化的模型跨平台互操作、触发相应的处理单元PAS、共享信息、执行企业的活动,浏览器可动态地显示业务执行的过程。整个企业的经营管理活动按一定的规则和次序有控地进行。     

协同开发环境中项目管理与工作流管理的集成

通过对分布式协同产品开发过程管理的需求分析，结合分布式项目管理系统和工作流管理技术，提出了一种适用于协同产品开发环境的层次化过程管理模式。给出了项目管理系统与工作流管理系统的集成框架，通过共享数据库的方式和对任务模型及其结构的设计研究，实现了分布式项目管理系统与工作流管理系统的信息集成和功能集成，为实现异构、自治、分布的协同产品开发环境中的过程管理提供了有力支持。     

项目管理与执行集成技术研究

项目管理与工作流技术对业务过程提供有力支持，它们各有特点，具有很强的互补性。针对企业的实际需求，提出了企业工作流空间的概念，并以此为基础，定义了基于双层工作流空间的项目管理与执行集成过程模型的概念，这两个空间通过关联关系保持协同一致。进一步深入研究了过程规划与过程调整的方法，提供了相应的算法，以此实现了过程模型的动态演化，从而达到适应业务过程实际需要的目的。     

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.     

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。     

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....     

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.