基于联邦模式的云制造集成体系架构

云制造平台可以为集团企业和中小企业提供在线服务,然而异构性及不相容性限制了跨平台的云制造资源与能力的共享和协作.为了解决这一问题,提出了基于联邦模式的云制造联邦集成架构及云制造联邦执行支撑环境,为多个异构云制造平台集成提供了一种有效的集成方案,既可实现云制造平台之间的制造资源与能力的共享与协同,也保持了原云制造平台的自治性,任何云制造平台的加入和退出都不影响其他云制造平台的运行.     

面向服务链构建的云制造资源集成共享技术研究

为实现时序约束关联任务驱动的云制造环境下面向服务链构建的制造资源集成共享,研究并提出一种能促进云制造环境下制造资源快速共享、广域集成和分散服务特点的服务过程模型,对基于语义本体的云制造任务与资源建模、基于Web服务资源框架的云制造资源的平台服务化封装方案、云制造任务分解与时序约束关联原子任务链构建技术,以及云制造资源服务链构建技术等关键问题进行了研究,有效解决了云制造环境下异构资源描述、虚拟化、检索匹配与服务组合问题,最后通过仿真算例对提出的云制造服务模式及技术方案进行了验证。     

基于SOA的数控加工厂云制造平台架构

为了满足数控加工厂灵活开发设计新业务的需求,快速响应业务环境的变化,简化服务的交付,实现数据中心的动态基础架构,提出了基于So A理念以及支撑技术构建面向服务的数控加工厂云制造平台架构,从数控加工厂的So A架构和制造云两方面对该云制造平台架构进行了描述,探讨了平台涉及到的核心关键技术,如数控机床智能保障系统、工艺优化系统、现场应用管理系统。为数控加工厂服务型云制造提供技术支撑。     

联邦式协同多Agent快速设计框架研究

在研究模块化快速设计特点的基础上,提出用联邦式协同多Agent对复杂产品进行快速设计。在全局Agent联邦协调下各Agent联邦协同设计,实现从“用户—功能—功能元—元模块—模块—产品”的映射,完成快速设计的全过程。阐述了主要Agent联邦的功能、协作、通信和工作机制,构建了基于联邦式协同多Agent和工作组的快速设计框架。     

云制造环境下跨企业协同生产调度算法

为解决云制造环境下的跨企业协同生产调度问题,提出一种适用于云制造环境下生产资源调度的混合集合规划方法。该方法基于切削算法框架,综合考虑多种约束,提出一种有效的求解策略,实现了一种面向订单且适用于跨企业、多约束、多品种、小批量的有限能力调度算法,为供应链中供需企业提供了一份拖期小、费用低、跨度短的协同生产计划。利用多组制造企业真实数据对模型进行测试,结果表明,该模型可在合理时间内有效求解实际应用规模的跨企业协同生产调度问题。     

云制造PaaS平台中协同过程构建与定制方法

云制造服务体系为实现产业专业化分工和社会化协作,存在大量合作伙伴之间的协同过程。协同过程普遍呈现出参与者多、协同链长、灵活多变等特征,对过程建模、定制、构建与执行等协同技术提出了诸多挑战。为此提出云制造PaaS平台架构和基于云制造PaaS平台的协同过程构建与定制方法,并给出定制的验证算法。基于该平台,平台运营商首先定义元协同主体及特征,制造服务独立软件开发商在将制造服务交付到平台上的同时定义协同主体及特征,制造企业可以租赁平台上的制造服务,并定制特定协同主体和特征。通过实例分析证明,基于该平台和方法,可以支持云制造服务的开发者和企业方便地构建各种协同应用,应对云制造服务体系中的大规模业务协同需求。     

基于模型、数据、知识的设计与制造协同框架

针对工业产品在研发制造过程中对于过程协同、数据协同、知识协同的设计与制造协同需求,构建了基于模型、数据、知识的设计与制造协同框架,给出设计与制造协同应用的顶层设计新思路。梳理了设计与制造协同过程中的模型、数据及知识资源,明确设计与制造协同的资源基础;搭建了基于系统互联平台、大数据云平台、知识协同平台、协同服务平台的网络化协同支撑平台的架构,构成企业的设计与制造协同网;设计了基于设计与制造全生命周期的协同协议,并构建了模型、数据、知识协同集成模型,给出基于模型、数据、知识的设计与制造协同应用;在某汽车变速器企业进行了应用验证,取得了良好成效,证明了框架的可行性。     

大型装备企业服务型制造协同平台研究

服务型制造是大型装备企业转型的趋势,为了更好的支持这种转型,实现异构、异域环境下的业务协同,促进企业形成差异化竞争优势,本文研究了以大型装备企业为核心的服务型制造协同平台。探讨了大型装备企业服务型制造运行模式,基于SOA理念以及支撑技术构建了面向服务的、松散的服务型制造协同平台架构,研究了平台涉及到的关键技术,如资源服务化封装技术、制造服务分类、服务匹配和组合技术。结合实例对平台进行了开发,这为大型装备企业服务型制造实施提供技术支撑。     

基于物联网的制造平台

针对制造业信息化对智能化、服务化和精益化的需求,提出基于物联网的制造平台框架。基于云服务的产品协同设计系统包括基于云服务的协同设计虚拟环境、基于PLM的设计过程数字化和设计支持智能化;基于物联网的数字化制造平台采用物联网技术和设备监控技术采集数据,依托制造资源和制造能力云,对工厂内的制造资源、生产过程、物料和质量等进行集中管控。     

基于资源管理联邦的复杂产品协同开发平台

通过分析当前复杂产品协同开发中面临的问题和高层体系结构在工业协同仿真中的应用,提出了基于资源管理联邦的复杂产品协同开发平台体系结构,资源管理联邦与对等的应用联邦间构成了层次联邦结构,在高层体系结构的范畴内,实现了资源的统一管理,以及软件资源共享联邦、协同设计联邦和协同仿真联邦的动态生成。平台在结构标准上与高层体系结构保持高度一致,支持多联邦任务运行。平台的应用范围扩充到Internet环境下,实现了基于Web应用的能力。重点讨论了资源管理联邦和基于Web的运行支撑环境这两项关键技术的设计思想与实现方法,并通过实例进行了说明。     

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.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.