基于Web Service和工作流技术的CAPP系统研究

针对目前CAPP系统存在的难以解决的集成化与可重构问题,提出一种基于Web Service技术和工作流技术的CAPP系统解决方案,成功实现了工艺设计流程的自动化、系统重组与系统集成。详细阐述了Web Service和工作流技术相结合的CAPP系统三层分布式体系结构、功能结构以及基于知识规则的工艺智能化生成的推理机制。重点介绍了Web Service技术在CAPP系统集成中的应用与实现机制,以及工作流技术在工艺设计流程管理中的应用。     

计算机支持协同工作的CAPP系统的研究

针对要提高CAPP系统的协同化和实用化水平,论述了基于CSCW的CAPP系统的实现方法;采用WebService技术对CAPP的结构进行了设计,同时采用XML对CAPP系统核心部分——工艺规程的数据进行了详细描述。最后,给出了基于CSCW的CAPP系统的体系结构,简述了该系统的工作流程。     

基于Web Service的温室远程监控系统设计

根据温室特点和Web Service技术原理,提出了基于Web Service技术的3层温室远程控制系统架构.采用.Net开发Web Service组件,利用JSP直接调用Web Service控制接口,开发了对温室进行远程手动控制的Web页面.结合J2EE开发Web服务器程序和基于Web模式的客户端程序,实现了温室的远程登录、参数查询和动态曲线显示等功能.温室远程监控系统已在实验温室和校园网内得到应用,结果表明其各项功能运行正常,系统稳定可靠.     

基于Web的组件化CAPP应用系统的开发

在分析Web环境下CAPP应用的功能需求的基础上,建立了组件化可重构的CAPP系统框架.对CAPP的通用服务进行分解,建立基于Web服务的CAPP网络服务,然后利用软总线技术对通用服务及其它扩展服务进行动态装配,提供不同服务功能模块的即插即用,以实现动态可调整性及扩展性.还讨论了基于XML技术的工艺资源数据存储与集成,分析了产品资源、零件信息资源等的数据格式.最后,以某企业CAPP系统为实例阐述了可重构CAPP框架及其在企业中的应用.     

Web Service技术在污水处理远程监控系统中的应用

为了解决污水处理远程监控系统结构复杂、开发周期长的问题,文中提出了一种基于Web Service技术的设计开发方法。首先,对污水处理监控系统的功能和数据需求进行分析,设计了Web Service接口软件架构;其次,制订了Web Service接口和接口规范,为系统的功能扩展提供了标准;最后,对设计的Web Service接口进行发布,并将其应用于污水处理远程监控系统中。结果表明:基于Web Service技术的污水处理远程监控系统提高了软件开发效率,增强了软件的复用性,方便系统功能扩展。     

基于Web的CAPP技术及其发展的探讨

通过对国内外CAPP发展状况的分析,阐述了目前基于Web的CAPP系统研究与开发的现状,提出WebCAPP技术实施过程中有待解决的一些问题,在此基础上进一步探讨基于Web的CAPP技术的发展趋势,以期望对将来的Web-CAPP发展作出贡献,从而对基于Web的CAPP系统有一个全面的、系统的认识和了解。     

Web Service技术在MAS中的作用的若干思考

基于Web Service技术的松散耦合、平台无关、语言无关等特点,对在MAS中应用Web Service技术所能带来的优点进行了分析和思考,提出了一种多层次封装的MAS系统组织结构和相应的Agent成员结构,探讨了Web Service技术在MAS的协作、通信方面的作用,指明了发挥两者优点的方法.     

基于Web的零件工艺信息提取技术的研究

因特网为解决企业在分布式设计和制造环境下的信息交流和共享问题提供了强有力的支持,提出了在Internet环境下,应用Web技术和ActiveX控件技术实现CAD／CAPP信息集成的思想,对基于Web实现零件工艺信息提取所涉及的关键技术和相应的实现方法进行了研究,在此基础上建立了基于Web实现CAD／CAPP信息集成的体系结构,最后,介绍了该项技术在所开发的基于Web的SR－CAPP原型系统中的应用。     

基于Web的工具型CAPP系统的研究

在基于Web的CAPP原型系统CAPP .NET前期研究[1 ] 的基础上对CAPP .NET具体实施方式和功能结构规划两部分进行了深入探讨。首先提出了推广应用CAPP .NET的理论模式和服务方式。在此基础上提出建立工具包 (toolkit)形式的CAPP .NET功能内核 ,通过分析企业对CAPP系统功能的需求 ,定义了工具包中广义的工具模块内容 ,并给出层次划分 ,然后给出了工具模块的实现方式和组合应用模式。最后给出了基于Web的工具型CAPP系统的实施示例和展望。     

基于Web的工艺设计中心

因特网作为信息传递与共享的主要载体，为解决企业在分布式设计和制造环境下的信息交流问题提供了强有力的支持。对实施基于Web的CAPP技术服务中心所涉及的关键支撑技术，功能模块和体系结构进行了研究，在此基础上建立了基于Web的CAPP技术服务中心－SR－CAPP原型系统。最后通过实例对原型系统进行了实用性测试，证明系统运行可靠方便。     

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.