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...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

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.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

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.     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.