轻质合金在汽车轻量化中的应用

为了降低空气污染,节省能源消耗,汽车轻量化已成为一种发展趋势.轻质合金的应用是实现汽车轻量化的有效途径,分别分析了铝合金、镁合金、钛合金3种轻质合金的特点与性能优势,阐述了轻质合金的发展与应用现状,总结了轻质合金在汽车轻量化应用中的现存问题,最后提出了我国汽车工业轻质合金的发展建议.     

铝、镁合金铸造在汽车领域的应用及发展（上）

面对汽车工业对轻合金材料的巨大需求和竞争压力，我国铝、镁合金铸造业同时面临着新的发展机遇和严峻挑战，铝、镁合金铸造行业的发展需要从技术、资源角度进行全面的整合，以适应21世纪产业发展的需求。本文重点介绍铝、镁合金铸造在汽车领域的应用及发展。     

镁合金在汽车工业的应用研究

中国的镁资源极其丰富,与其他金属材料相比具有显著的特性,被广泛应用于许多行业和领域,镁合金全部产量中有60%用在了汽车工业,并且呈现出增长趋势。本文从镁的特性入手,分析了其应用于汽车工业的主要优势所在,通过阐述镁合金在汽车工业的应用情况,总结出未来一个时期内,我国镁合金产业将会处于一个新的变革时代,镁产业将会实现规模化、智能化、绿色化制造。     

铝、镁合金在东风商用车发动机中的应用分析

现阶段铝、镁合金由于自身较强的性能,在汽车工业生产中有着重要应用,尤其是铝、镁合金质地较轻并且自身强度较强,在汽车零部件轻量化使用阶段具有较大的优势。本文主要介绍了铝、镁合金材料在汽车工业生产中的应用,结合东风商用汽车,简要分析了该合金在汽车发动机中的应用。通过对于常见发动机故障的分析,重视铝、镁合金在汽车工业生产中的应用。     

数字技术在工业电气自动化中的应用与创新

随着经济的发展,科学技术水平的不断提升,数字技术已经逐步应用到工业电气自动化中,尤其是在汽车制造业中,数字技术的应用更加普及。一直以来汽车工业是我国经济发展的重要组成部分之一,其发展速度非常迅猛,对进一步提高我国综合国力具有非常重要的意义,为了能够提高汽车工业电气自动化水平,有必要深入研究数字技术在工业技术中的应用。本文系统地阐述了数字技术在汽车工业产业中的应用,旨在优化和创新电气自动化水平,推动汽车工业的可持续发展。     

高温镁合金的研究进展及其在汽车工业中的应用

综述了国内外高温镁合金的研究进展及其在汽车工业中的应用。重点讨论了高温镁合金的抗高温蠕变机理，最后对高温镁合金的研究开发提出了一些建议。     

工业机器人在汽车焊装领域中的应用浅析

基于我国工业机器人技术的不断发展,工业机器人在汽车焊装领域的应用越来越普及。通过运用工业机器人不仅有效提高了汽车焊装工艺效率,而且还提高了焊装生产质量,降低了故障率。工业机器人对汽车焊装的自动化控制主要是通过PLC实现,因此本文以工业机器人在企业焊装领域中应用的优势作为切入点,设计汽车焊装工业机器人,分析工业机器人在汽车焊装领域的具体应用。     

汽车轻量化与制造工艺

汽车轻量化是当前汽车工业发展方向,阐述轻量化工艺在我国现代轿车轻量化中的应用,介绍内高压成型技术、管件液压成型技术、轻量化连接技术等先进轻量化工艺,讨论轻量化工艺技术可行性,提出了我国现代轿车轻量化工艺技术发展方向.     

浅谈机械自动化技术在汽车制造中的应用实践研究

随着我国经济事业的不断发展,我国的产业集群程度不断加强,相关产业的机械化应用水平持续提高。在汽车制造行业,机械自动化技术的应用水平与范围不断增强。文章主要聚焦于我国的机械自动化技术在汽车制造中的应用现实,分析机械自动化技术在汽车制造中的应用现实可能性,探究机械自动化技术在汽车制造中的应用现状与优势,并探究其未来的应用发展方向,希望能够促进我国汽车行业的发展,提升其自动化水平。     

电子诊断在汽车维修技术中的应用研究

科学技术快速发展给我国的汽车行业发展带来了新的机遇,汽车中的现代化设备的整合运用越来越多,不可避免地带来了更多的汽车故障问题,对汽车维修技术提出了更高的要求。电子诊断技术作为目前我国的现代汽车维修中必不可少的技术手段,本文对电子诊断技术的发展背景进行了探讨,结合电子诊断在汽车维修技术中的应用优势,分析了电子诊断在汽车维修技术中的具体应用。     

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.