风机行业备件零库存存储策略及预测模型研究

备件零库存已成为以用户需求为导向、旨在提高用户满意度的服务模式。针对如何进行备件的可靠预测和存储、实现备件最优共享等问题,对风机行业备件零库存的存储策略及预测模型进行了研究。     

浅谈工业企业零库存管理工作思路

通过论述零库存管理的概念及起源,对国内企业的零库存案例进行解析,提出了企业实现零库存的内外部条件,为企业实现零库存提供参考。     

推行"零库存"和"配送制"管理实施"日历作业制"的实践与体会

结合大齿集团自2000年以来，推行“零库存”管理和“配送制”，确保生产按市场拉动实施“日历作么制”的实残，阐述了“零库存”、“配送制”和“日历作业制”的推行给大齿集团生产管理带来巨大变化的过程和体全，并提出今后进一步提升生产(物流)管理水平，确保市场和用户满意的设想。     

快速响应--中小型制造企业应对订单制造的策略

随着产品生命周期的缩短,企业"零库存"生产模式的推广,订单加工已成为中小型制造企业的一种重要生产方式.在分析我国现有中小型企业面向订单制造现状的基础上,针对现代订单产品的特点,提出了一套基于快速响应的订单产品制造体系,并已部分在企业中实施.     

基于专利分析的产品技术成熟度预测技术及其软件开发

基于发明问题解决理论（TRIZ），分析了产品技术成熟度及其预测现状，在综合Altshuller和Mann研究成果基础上，提出了基于专利分析的产品技术成熟度预测技术，对产品技术生命周期进行了细化，讨论了预测算法和步骤。基于产品技术成熟度预测技术开发了专用软件——产品技术成熟度预测系统（TMMS），并应用软件TMMS预测了蝶阀密封技术的成熟度。     

液压气动密封行业的现状与发展趋势

通过对2003年液压气动密封行业280余家重点骨干企业的统计数据进行分析，从经济指标、产品特点、质量管理等不同角度阐述了液气密行业的现行状况，并结合液气密产品主要为主机配套使用的的特点，预测了液压气动密封产品今后的技术发展趋势及市场前景。     

我国农用运输业行业发展趋势浅析

本文回顾了我国农用运输车发展史，对今后市场需求，市场竞争和产品发展进行了预测及分析，并就目前存在的问题进出了几点建议。     

发挥社会协作优势 推进零库存管理

介绍了鞍钢零库存管理的实施与推进过程以及具体做法,并提出了注意事项。     

基于数据挖掘的需求分析研究

客户关系管理软件的兴起，使数据挖掘等技术在市场、客户分析预测方面得到了广泛使用。可以利用企业产品历年的销售数据及调查结果，形成一个关于产品的数据仓库，挖掘出客户需求的规则和模式，并进行模糊推理，指导产品开发，在这个思路下开发出一个基于数据挖掘及模糊推理的需求分析模型。     

耕整机产品特点及使用

介绍耕整机产品特点和结构型式，并对其技术发展进行了预测。简要分析了耕整机工作状态及作业方式。     

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.