ERP实施方法论研究

在对ERP实施研究现状分析及实施方法论比较的基础上,运用系统方法论,特别是霍尔模型方法论、WSR方法论,对ERP实施方法论进行了明确的内涵界定,并建立了ERP实施方法论的逻辑步骤模型,以及三维框架模型,最后论述了ERP实施方法论的详细过程,并通过实际案例验证了ERP实施方法论的有效性和可用性。     

基于抉择矩阵的ERP流程中岗位权限分析方法的研究

目前,国内外企业实施ERP项目过程中,对ERP系统涉及到流程中对应的岗位及权限设置大多是由实施顾问根据其实施经验来配置,具有一定主观随意性,这影响了ERP岗位及权限设置的合理性,从而也在一定程度上影响了ERP项目的成功实施。本文针对这一现象提出了一种基于抉择矩阵的分析方法来研究ERP项目流程中岗位和权限设置方法,并结合实例进行说明,最终能给后续企业实施ERP项目提供一种较为科学、合理并具有可操作性的实施方法论。     

ERP实施要素及内涵

提高ERP实施成功率是企业信息化的重要课题。通过研究ERP系统三要素和ERP环境三要素，得出ERP实施体系三维立体交叉结构模型，并提出ERP实施体系的内涵。对于成功实施ERP有应用参考价值。     

中小企业ERP项目实施案例分析

成长型中小企业ERP系统建设日益获得重视。对一个中小纺织企业ERP项目实施案例进行分析与总结。说明项目实施方法论,讨论项目的需求分析、业务流程优化与蓝图设计,对项目的效益进行总结。     

ERP实施商模糊综合评价方法研究

为了避免ERP项目的实施风险，全面、客观地评价ERP实施商，提出了一种通用的模糊综合评价方法。具体阐述了模糊评价模型的建立过程，首先建立了ERP实施商的评价指标体系，并根据模糊一致关系原理，给出了确定指标权重的方法。重点研究了不同类型指标隶属度的确定及隶属函数的构造，建立了模糊综合评价矩阵。最后分别用分值法和序偶法对评价对象进行综合排序。     

ERP实施要素及内涵

提高ERP实施成功率是企业信息化的重要课题。通过研究ERP系统三要素和ERP环境三要素,得出ERP实施体系三维立体交叉结构模型,并提出ERP实施体系的内涵。对于成功实施ERP有应用参考价值。     

面向企业的广义ERP实施及过程改进方法研究

以软件系统建设为中心的狭义ERP实施方法，容易使企业忽视ERP蕴含的供应链的核心思想及对管理变革的强烈要求，最终导致实施目标的彻底落空。为此，提出面向企业的广义ERP实施概念，体现了企业ERP实施从概念认知到经营模式、工作方式以及管理体制全面转变的完整特征。构建了以业务应用及支持、管理及技术支持、过程支持和项目执行为支撑的组织模型，以及以战略、业务运作、管理基础和技术基础支撑为层次架构的过程模型。最后讨论了基于评价的广义ERP实施过程改进的体系及方法。     

ERP的团队协同式实施模式研究

低的ERP实施成功率，致使管理人员对ERP的实施模式更为关注，本文提出了一种团队协同式实施模式，并详述了团队协同式实施模式的组成结构和工作机制。     

基于过程建模的ERP自动配置方法

目前一般企业的ERP系统往往缺乏灵活性,与不断变化的应用需求相脱节,使得企业在实施ERP过程中存在较大风险和困难。本文在对几种ERP配置方法分析比较的基础上,提出了基于过程建模的ERP自动配置方法,研究了ERP系统的可配置性,定义了企业模型向ERP系统可配置模型的映射,并建立了这种方法的数学模型。在此基础上,开发了一个建模工具并建立了ERP系统的集成平台,以较小的代价实施和维护ERP系统,解决了企业因机构或业务流程的变更所造成的ERP系统不适用的问题。本文所提出的方法已在江西洪都航空工业集团公司得到成功的应用,取得了很好的效果。     

煤炭企业ERP中作业BOM的模型及实现

BOM的设计与实现是煤炭企业ERP成功实施的关键。本文详细论述了作业BOM是煤炭企业ERP的必然选择,分析了煤炭企业作业BOM的特点,并分别设计了煤炭企业ERP中作业BOM的结构模型和数量模型及其实现。     

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...     

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。     

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.     

Fractional order nonsingular terminal sliding mode control for flexible spacecraft attitude tracking

This paper investigates a fractional terminal sliding mode control for flexible spacecraft attitude tracking in the presence of inertia uncertainties and extern...     

奥氏体不锈钢表面双辉等离子渗锆的动力学

利用双辉等离子渗金属技术在0Cr18Ni9Ti奥氏体不锈钢表面制备了一层均匀、致密、呈良好冶金结合的渗锆合金层,并对1 060℃下的渗锆动力学进行了研究。结果表明:随着距锆合金层表面距离的增加,锆元素的含量呈梯度递减,扩散系数逐渐减小,而扩散激活能逐步增大;在1 060℃采用双辉等离子技术渗锆时,渗锆合金层表层的空位密度为2.945×(1012~1013)cm-2,与相同温度下采用常规渗金属工艺相比,提高了1~2个数量级。     

气化炉三维扫描测量与数据处理

以德士古气化炉耐火砖的内壁蚀损检测设备为基础,对采集到的点云数据做了进一步处理.通过对数据的筛选和剔除,实现了数据点的平滑降噪细化和精简.然后利用点云对整、网格划分和分色显示等方法,最终完成了内壁腐蚀情况的三维建模.重点讨论了点云数据的预处理及后处理的方法,并根据内壁耐火砖的腐蚀阈值,提出了一种气化炉内壁腐蚀区域的识别与分割方法.对耐火砖的腐蚀分析、气化炉的生产与维修提供了可靠依据,并在工程应用中获得了一致认可.