基于PDM的工作流程管理的研究

工作流程管理是PDM系统中实施业务过程管理与过程控制的一项关键技术。阐述了工作流管理的功能。工作流程管理系统从模型定义到流程监控与管理都采用图形化的操作形式,能够动态定义、修改和管理业务流程,具有较高的可靠性与可塑性,为企业产品设计审批管理的自动化提供了保证,实现了企业产品设计管理流程化、规范化.     

压缩机组配件信息管理系统的设计

为了满足压缩机组配件管理的要求,设计了基于VB+SQL Server的压缩机组配件管理系统,实现了配件管理业务中的入库管理、库存管理、出库管理、报废退库管理和报表等,有效提高了配件管理的效率。     

基于.NET的养老院服务管理系统的设计与实现

养老院服务管理系统采用对中间业务层处理具有强大功能的.NET技术平台,应用了Ajax技术,实现了权限管理、用户管理、费用管理、老人管理、仓库管理和床位管理等功能,满足了养老院日常管理工作的需求。     

物流管理与供应链管理的比较

为了澄清物流管理和供应链管理在概念上的混淆,比较了物流与物流管理、供应链与供应链管理的异同,讨论了物流链和供应链物流的概念,阐述了物流管理与供应链管理之间的区别与联系。并由此得出物流管理与供应链管理在存在基础、管理模式、导向目标以及管理层次和手段等方面的差异,而从范畴与内容上讲物流管理是供应链管理的核心,也是其最重要的子集。     

设计管理系统的实现与仪表设计

设计管理的内容包括文档管理、人力资源管理、流程管理、质量管理、进度管理等。设计管理系统使用数字化手段自动实现了设计管理的任务,使设计工作有序开展,提高了项目的执行速度和质量。     

基于J2EE和UML的企业备件管理业务系统的研究

设备管理是现代企业管理的重要组成部分,备件管理是其中的一项重要内容,但在实际企业管理运作过程中,备件管理往往是其薄弱环节。本文针对企业备件管理现状,建立了基于J2EE和UML的备件管理业务系统,在分析企业备件管理业务流程的基础上,进行了业务流程优化。最后就其在企业中的应用实践进行了总结,并对今后研究的方向进行了展望。     

基于J2EE的实验室信息管理系统的设计与开发

为解决实验室管理普遍存在的数据量大、数据形式复杂、分析效率低等问题,提出了采用J2EE架构设计与开发的实验室信息管理系统（LIMS）。该系统按功能划分为合同管理、样品管理、检验管理、报告管理、客户管理、资源管理、质量管理和文件管理等模块,在Web层使用了JSP技术,通过Servlet控制业务流程,运用JavaBean处理业务数据逻辑,并建立了J2EE4层架构。该系统已在某低压电器实验室投入运行。研究结果表明,该系统在实现信息资源共享方面起到了关键性作用,可以显著提高实验室的工作效率和管理水平。     

支持协作产品开发的过程管理研究

作为先进制造中的重要技术,过程管理正受到越来越多的重视,并在企业中得到了日益广泛地应用。本文基于当前两种主要的过程管理技术:项目管理和工作流管理,分析了它们对产品开发的支持,提出基于两者集成构建支持协作产品开发的过程管理平台。文中通过对两种过程管理技术的研究,给出了支持协作产品开发过程管理的总体框架。并进一步研究了该框架下过程管理的工作模式,以及项目管理和工作流管理间的集成接口。     

电力工程管理中进度管理若干问题的探讨

首先对进度管理在电力工程管理中的重要作用进行了简要阐述,进而分析了进度管理的影响因素,并对进度管理的效果进行了探究,最后提出了实施进度管理的具体措施。     

电能表管理效能管控要点和方法的探讨

电能表全寿命周期管理效能是计量管理的核心,也是营销管理的重点。通过分析电能表全寿命周期管理各环节的管理特性和管理风险,总结了生产管理、信息应用、财务管理等多方面的电能表管理效能管控要点,提出了有效可行的管控方法和建议。     

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.