从无人驾驶汽车奔赴世博会看未来汽车

将意大利无人驾驶汽车奔赴世博作为引子,分析和研究了无人驾驶汽车的重要意义、发展状况、原理和技术以及所面临的复杂问题,展望了无人驾驶汽车的未来。     

无人驾驶汽车目前存在的问题以及迅速普及的建议

随着汽车科技的发展以及人工智能技术在新时代的普及,无人驾驶的研究就成为整个汽车产业的最新发展方向,这一技术的突破意味着在交通上能够给人们带来更多的便利。尽管无人驾驶的前景诱人,但是使交通秩序和管理模式带来了新的问题。基于这种情况,通过对无人驾驶汽车的研究和考察,发现在各方面存在的问题并提出一些建议,希望为今后无人驾驶汽车更安全更便捷的发展提供帮助。     

无人驾驶汽车安全性分析

本文将传统汽车与无人驾驶汽车的安全性能进行了对比,分析出无人驾驶汽车优势所在;并以无人驾驶汽车具体事故作为实例,从技术方面分析产生事故的原因,提出提高安全性能的措施是进一步优化无人驾驶汽车上传感器的精度和智能化程度。     

无人驾驶与物流发展现状

无人驾驶是汽车行业的关键方向之一,随着云计算、人工智能、现代传感、信息融合、通信以及自动控制等高新技术的不断进步,无人驾驶汽车的发展速度将随之加快,人们对无人驾驶汽车的接受和需求度也在逐渐提升.现阶段,虽然无人驾驶汽车还没大范围推广,但其适用领域逐渐显现.     

无人驾驶汽车市场应用研究

随着汽车智能技术在汽车研发生产上的应用推广不断深入,无人驾驶汽车将成为未来汽车行业的主要产品。本文针对无人驾驶汽车的特有优势,通过市场调研走访分析归纳,进而在潜在用户中进行深入的调查,分析无人驾驶汽车城市市场推广。     

无人驾驶时代临近哪些传统零部件将消失?

<正>没有方向盘、不使用汽油、不安装刹车踏板……这些出现在好莱坞大片中的科幻汽车正快速驶向现实。5月15日,美国谷歌公司表示,从今年夏季开始,该公司生产的自动无人驾驶汽车开始接受道路测试,同时车上将安排驾驶员"坐镇"。据悉,这样的无人驾驶汽车安装了可拆卸的方向盘、油门踏板和刹车踏板,方便驾驶员在必要时操控汽车。早在一年前,谷歌就推出了没有方向盘、油门、刹车踏板和换挡装置,完全通过软件和传感器控制的无人驾驶汽车。自动驾驶、无人驾驶汽车的研发浪潮已经颠覆了传统的汽车     

无人驾驶汽车发展现状及关键技术分析

近年来,无人驾驶汽车作为汽车未来发展的重要方向,备受人们的关注与期待。文章分析了国内外无人驾驶汽车的发展现状,以及各企业无人驾驶技术发展路线的差异。此外,就无人驾驶汽车的关键技术:环境感知技术、定位导航技术、路径规划、运动控制进行了分析,并对现阶段无人驾驶汽车面临的挑战进行浅析。     

基于车载综合监控系统在无人驾驶技术中的应用

在我国经济发展与科技发展过程中,汽车成为了人们生活中不可缺少的工具,并且在近几年发展中汽车行业发生了很大变化,从手动档汽车到自动档汽车直到现在,相关技术人员开始研发无人驾驶汽车,并基于车载综合监控系统技术之上,要对无人驾驶技术进行完善。并且通过地铁将车载综合监控系统在全国范围内进行推广,因为随着社会发展地铁对监控的要求越来越高;并且我国正在将无人驾驶地铁线路还进入了试运营阶段,也因为无人驾驶地铁项目的出现所以就使综合监控有了更高需求。     

浅析无人驾驶汽车发展现状与问题

回顾并介绍了国内外无人驾驶汽车的发展历程与现状,结合目前的技术发展水平对无人驾驶汽车领域面临的问题进行了讨论与分析,对无人驾驶汽车的普及应用和产业化的发展做了总结与展望。     

无人驾驶传感器系统的发展现状及未来展望

无人驾驶技术是目前广受关注的新技术,各大汽车厂商争相研发相关产品。汽车依靠传感器,帮助汽车感知外部环境,并通过测量数据帮助汽车作出正确的判断,进而实现无人驾驶。传感器系统直接影响着无人驾驶汽车的品质,也决定着未来无人驾驶汽车是否能够被消费者接受。本文介绍了无人驾驶传感器系统的主要部件,并分析了其发展现状,预测了未来的发展方向。     

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.