基于业务流程再造缩短发动机新品研发时间的研究

加速新产品研发,缩短新品研发周期,节约研发成本已成为世界各国制造企业争夺市场的战略手段。针对新品研发管理,通过对企业现有新品发动机研发流程进行分析,应用ASME分析法和ESIA整合法对其进行优化改进,从而达到缩短研发时间的效果。     

新型复合材料研发流程管理系统设计研究

研发生产新型复合材料,并对研发流程进行集成化管理,可以大大提高材料的研发速度,缩短研发周期,节省研发成本,从而提高复合材料生产企业的竞争力。系统运用强大的工作流技术来规范和管理新型复合材料的研发流程,大大提高了企业的工作效率。根据整个系统的实施特色,分析了系统的功能结构模块,并研究了每个模块具体的工作流程,设计了典型的ASP.NET三层架构,通过在上海某材料企业研发流程管理的成功应用,证明了该系统的可行性。     

机电物资成本管理探讨

随着经济社会的发展,我国各行各业发展的自动化、机械化势头迅猛,许多行业对于机电设备的依赖程度很高。机电费用支出约占企业生产总成本的40%,因此对机电物资成本的管理控制是企业成本管理的重点与难点。企业对机电物资成本的良好管理能够促进自身发展,使得其在激烈的市场竞争中占据优势地位。本文从机电物资成本管理的概述出发,分析了机电物资成本管理的相关策略及具体措施,有利于企业机电物资成本管理的顺利开展,实现企业的良好稳健发展。     

云制造环境下产品研发项目进度管理技术改进研究

针对云制造环境下复杂新产品开发项目的特点,提出了将过程管理技术应用于项目进度管理,即基于过程结构化分析和优化来控制项目的进度和成本,此技术将变传统的职能型项目进度管理为面向过程的进度管理,系统化地统一研发过程的合理设计技术和实用的、良好而成熟的项目管理方法,为云制造环境下复杂新产品研发项目提供一项更有效的进度管理技术。     

产品研发中基于ProA的知识管理

产品研发过程质量、资源、成本、进度全局集成管理和综合优化是制造企业提高竞争力的重要途径。为了实现产品研发过程四要素集成优化,基于活动及其实现过程(ProA)信息集成建模方法,分析了产品研发中ProA的知识需求,探讨了产品研发中ProA的知识以及ProA的知识获取机理,论述了基于ProA的知识管理过程,使产品知识管理过程与产品研发过程集成,促进知识的传递、共享和再利用,有效地服务于产品研发过程中的具体活动,为产品研发全过程的决策和推理奠定基础。     

制造企业协同物流管理系统的研发

结合现代物流管理技术,研发了制造企业协同物流管理系统,详述了系统模型、结构与功能等。系统应用于中国水电建设集团夹江水工机械有限公司,降低了物流成本,提升了物流效率与企业竞争力。     

改进铁路工程建设项目物资设备成本管理建议

本文主要研究铁路工程建设项目物资设备的成本管理,在简要概述物资设备成本管理特征及意义下,对图铁路工程项目的物资管理、设备管理进行详细探讨,分析其在项目投资管理、企业经济效益中的作用,并提出几点行之有效的优化策略,旨在将铁路企业成本降到最低,从而促进铁路工程建设的良好发展。     

利用精益思想来降低制造型企业的成本

改革开放30多年来,我国的制造型企业发生了翻天覆地的变化,我国也逐步成为世界工厂.然而,与发达国家相比,我国的制造企业在现代成本管理方面仍然存在着不小的差距,这直接导致了我国的自主产品缺乏市场竞争力.对我国制造型企业在现代成本管理方面存在的缺陷进行了分析,并利用丰田公司的精益思想,在企业研发、采购、生产、人力资源管理等环节提出降低我国制造型企业成本的有效途径.     

加强企业标准化工作 促企业稳定快速发展

标准化工作涉及企业科研开发、生产、技术、经营、管理等一系列综合性基础工作，做好企业标准化工作对加速新产品创新研发、提升产品等级、提高产品质量、降低生产成本、强化企业科学现代化管理、开拓市场，以及改善企业经济运行质量都具有十分重要的作用。它对促进企业科技进步，提高产品质量，增加企业经济效益起着积极的促进作用。     

装备制造企业研发绩效管理研究

通过结合装备制造企业研发绩效管理的特点,分析总结出装备制造企业研发绩效管理的现状及存在的问题,并提出装备制造企业研发绩效管理的对策建议。     

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.