GT/CAD/CAPP/PDM/ERP系统集成研究

研究ETO生产方式下以成组技术为基础的CAD/CAPP/PDM/ERP的集成方法,包括面向CAD/CAPP/PDM/ERP的集成的成组信息编码,基于成组编码的CAD/PDM集成、CAPP/PDM集成和PDM/ERP集成.提出了基于成组技术的CAD/CAPP/PDM/ERP集成框架,研究了贯穿于CAD、CAPP、PDM与ERP系统的统一的成组编码方案和信息编码方案.     

试金集团CAD/CAPP/PDM/ERP系统信息集成的解决方案

CAD/CAPP/PDM/ERP系统是企业信息集成的重要组成部分,是集成的关键技术之一.本文针对企业信息化现状和存在的问题,介绍了CAD/CAPP/PDM/ERP系统的概念,提出了CAD/CAPP/PDM/ERP各子系统信息集成的方法;阐述了CAD/CAPP/PDM/ERP系统的实施步骤,为企业信息化提供一套信息集成的解决方案.     

GT／CAD／CAPP／PDM／EPR系统集成研究

研究ETO生产方式下以成组技术为基础的CAD／CAPP／PDM／ERP的集成方法,包括面向CAD／CAPP／PDM／ERP的集成的成组信息编码,基于成组编码原CAD／PDM集成、CAPP／PDM集成和PDM。ERP集成。提出了基于成组技术的CAD／CAPP／PDM／ERP集成框架,研究了贯穿于CAD、CAPP、PDM与ERP系统的统一的成组编码方案和信息编码方案。     

试金集团CAD/CAPP／PDM／ERP系统信息集成的解决方案

CAD／CAPP／PDM/ERP系统是企业信息集成的重要组成部分,是集成的关键技术之一。本文针对企业信息化现状和存在的问题,介绍了CAD／CAPP／PDM／ERP系统的概念,提出了CAD／CAPP／PDM／ERP各子系统信息集成的方法;阐述了CAD／CAPP／PDM／ERP系统的实施步骤,为企业信息化提供一套信息集成的解决方案。     

PDM与CAD/CAPP/ERP集成应用浅析

PDM与CAD/CAPP/ERP的集成应用是推进企业整体信息化的重要途径。详细介绍了PDM与CAD/CAPP/ERP之间的功能和关系,探讨了集成应用实施总体规划,从集成内容内核心、集成方式等方面分析了PDM与CAD/CAPP/ERP的集成以及在企业应用中的实现,为制造企业实施PDM与CAD/CAPP/ERP的集成提供了有益的借鉴。     

基于STEP和WEB的箱体零件CAD/CAPP/CAM/PDM集成技术研究

叙述的CAD／CAPP／CAM／PDM集成中,CAPP子系统是基于WEB的。CAPP所需的工艺和几何信息是从CAD系统输出的STEP文件中提取的零件形状特征与用UFUC获得的精度等信息匹配合成并存入数据库、NC编程需要的信息来自CAPP输出的零件工艺过程代码文件及从STEP中提取的几何数据。因基本数据存储在数据库中,为与PDM的信息集成提供了基础。     

面向中小型企业的CAD/CAPP/PDM/ERP集成技术的研究

阐述了PDM与CAD／CAPP及PDM与ERP的集成模式;讨论了面向中小型企业的CAD／CAPP/PDM／ERP集成技术,并在面向中小型企业的PDM系统的开发过程中实现了本文提出的方法。     

AutoCAD与数据库间数据交换技术的研究

阐述了AutoCAD与数据库之间进行数据交换的方法和手段,建立了零件总体信息与数据库之间的数据传递关系,可实现CAD与CAPP的数据共享,为CAD与CAPP/PDM/ERP之间的信息集成打下了基础.     

基于PDM的CAPP系统集成技术的研究与实现

提出了一种以PDM为基础的CAPP系统的实现方法 ,探讨了CAPP系统与PDM系统集成以及CAPP系统与CAD系统集成的关键技术 ,并对CAPP自身的权限管理、项目管理和流程管理提出了一种新的结构模式。     

基于PDM的CAPP系统集成技术的研究与实现

提出了一种以PDM为基础的CAPP系统的实现方法,探讨了CAPP系统与PDM系统集成以及CAPP系统与CAD系统集成的关键技术,并对CAPP自身的权限管理、项目管理和流程管理提出了一种新的结构模式。     

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.