表单系统与工作流引擎集成设计与实现

针对产品设计任务节点的工作流过程中出现的表单设计问题,提出了表单系统与工作流引擎集成的一种设计与实现方案。产品设计过程中,表单系统需要与工作流引擎集成完成任务流转功能。针对系统集成中存在工作流节点控制表单元素权限属性、表单元素和工作流变量之间参数映射等问题,提出了工作流引擎和表单系统元素的权限属性动态配置方法,以及两者参数映射等模型。该方法成功地应用于HTC产品设计项目管理系统中的工作流引擎与表单系统集成过程,结果证明了该方案能够解决实际中存在的问题。     

面向ERP的工作流管理系统应用研究

全球化市场的发展与多企业合作经营的生产方式要求ERP系统具有高度的柔性和敏捷性以适应企业的过程重构及协作方式的变化.本文分析了传统ERP系统在过程集成和企业间集成方面的不足,讨论了工作流管理系统的基本概念和体系结构,提出了动态可重构ERP系统中的工作流引擎的构件,最后阐述了工作流管理系统在ERP系统中的应用.     

虚拟仪器通用测试引擎的设计与实现

本文提出了基于通用测试引擎实现测试系统开发的方法,并将引擎分为功能层(系统无关、硬件无关层)、逻辑层(仪器无关层)、仪器控制层三个层次,并且分析了测试引擎的数据结构及实现方法。     

中小企业PDM系统中WFMS的设计与实现

在分析工作流管理联盟提出的通用工作流系统产品实现模型的基础上,提出了一个符合中小企业特点的工作流参考模型,并给出了基于J2EE的系统结构。使用VML实现了基于浏览器的流程自定义工具,采用XML对工作流程模板进行定义。设计出系统的数据库物理模型,并以此为基础实现了该系统的工作流引擎,最后探讨了在该引擎下系统具体的运作过程。     

基于关系数据库的工作流引擎设计与实现

探讨了一种数据库驱动的工作流引擎的实现方案;分析了中心数据库的作用,并给出了数据库模型图;从流程分配、路由选择、消息发送及监控管理方面详细分析了工作流引擎的实现机制。     

基于半实物仿真技术的综合传动装置电液系统维修训练平台设计

为了使学员更加直接、高效、全面地了解和掌握综合传动装置电液系统,以综合传动装置电液系统的维修训练为研究对象,设计了一个基于半实物仿真技术的维修训练平台。该平台从系统维修保障实际需求出发,在功能需求分析的基础上,进行了总体方案设计,采用三维建模、图像处理、人机交互与通信等技术,使用Unity3D引擎实现了该训练平台的开发。试验表明,该平台操作界面友好、交互真实自然,能够大幅提高电液系统学习训练效率。     

基于构架重用的虚拟操作训练领域仿真系统的研究

对于虚拟操作训练领域仿真系统构架的研究,不仅能统一系统的建模方法,还能实现对软件系统构架和构件最大程度的重用。针对虚拟操作训练领域,本文提出了其仿真系统的可重用构架,以及基于该构架的系统建模方法和仿真引擎的设计方法,以方便用户快速产生基于构架的不同类型特定虚拟操作训练领域应用系统的仿真方法。     

规则引擎技术在制造执行系统中的应用研究

对制造执行系统和规则引擎特点进行分析后,针对传统制造执行系统的不足,设计实现了一个基于规则引擎的制造执行系统,以增强系统的柔性和实用性.最后,详细阐述了在该系统中执行一条用户定制规则的内部实现机制.     

凸轮轴数控磨削云平台的研究与设计

针对整合磨削加工领域资源的问题,借鉴云计算与云制造的思想,提出并开发了整合与利用磨削软硬两大类资源的磨削云平台。提出了磨削云平台体系架构,设计了其软件结构,研究了其关键技术。利用人工智能技术,设计了磨削云平台应用需求模型及其工作流程与关键算法。开发了SaaS服务系统、PaaS服务系统、IaaS-to-PaaS分布式异构数据库同步复制系统、IaaS服务系统、用户注册登录管理系统5个软件子系统所组成的磨削云平台,使得企业在资源利用上更为优化便捷。将该磨削云平台应用于实际生产,有效提高了生产加工效率,降低了生产成本。     

贵阳轨道交通1号线BAS组网方案的分析

介绍了利用单环以太网组网方案的环境与设备监控系统(BAS)在贵阳轨道交通1号线的应用,分析此种BAS系统结构、设备组成、组网方案与综合监控系统(ISCS)接口处理方案等系统相关特性;并且通过对不同组网方案的特性比较,对后续地铁BAS的设计具有一定的参考价值。     

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.