信息安全背景下智能汽车CAN总线异常检测技术研究

智能汽车CAN总线异常检测技术能够为智能汽车的安全性提供有力的保障。然而CAN总线老化损坏,使得车机系统出现问题。本研究创新了一种汽车CAN总线检测装置来解决汽车CAN总线的检测问题,能够检测汽车CAN总线的故障,以及检测汽车CAN总线的运行状态。采用实验室实验的方法,对汽车CAN总线检测装置进行了系统的测试。汽车CAN总线检测装置具有较高的精度和可靠性,能够有效检测汽车CAN总线的运行状态,并且具有较高的安全性和可靠性,可以满足汽车CAN总线检测的要求。     

基于CAN总线的直流电源在线监测

CAN总线是一种主要用于各种过程检测和控制的现场总线网络。由于可靠性高．实时性好．成本较低．近年来已经广泛应用于各种工程控制领域．特别是汽车自劫化领域。本文简要介绍了CAN总线的技术特点和工作原理．同时将CAN总线应用于直流电源在线检测，设计了系统结构并介绍了系统的工作过程。     

CAN总线在电梯远程监控系统中的应用

介绍应用了CAN总线的电梯远程监控系统的组成结构及功能,详细描述了基于CAN总线的数据传输模块的工作方式以及过程,同时,还详细的介绍了CAN总线的功能特点及其控制器的功能。     

CAN总线在结晶器振动监控系统中的应用研究

根据CAN总线的技术特点,提出了基于CAN总线的结晶器振动监控系统设计方案,介绍了CAN总线网络结构和MC9S12DG128的CAN控制器结构.在硬件电路设计中,对CAN总线实现原理及设计要点进行了详细介绍,软件部分给出了以控制器为核心的CAN总线节点模块的应用层软件.实验表明:该通信系统性能稳定、可靠、成本低,具有较高的实用价值.     

基于CAN总线的数字式传感器群管理系统

针对传统模拟传感器群系统布线复杂、成本高、干扰大等缺点,提出了一种基于CAN总线的数字式传感器群的集中管理方法以及系统硬件实现,介绍了新型数字式传感器的原理、性能和接口。并对CAN总线的性能和特点进行了详细的介绍。     

CAN总线在智能建筑温湿度自控系统中的应用

本文介绍了CAN总线的性能和特点,提出了一种基于CAN总线的分布式控制系统,详细阐述了系统的硬件组成、软件设计和工作原理。     

基于CAN总线的发动机测控系统的研究

CAN总线通信以其节省线束、系统可靠、便于诊断等特点,正成为发动机电控最重要的发展方向。本文介绍了一种基于CAN总线的柴油发动机测控系统的设计方法,详细给出了系统的硬件总体结构设计、软件设计流程以及CAN总线控制器结构。     

CAN总线技术在高低压配电在线检测系统中的应用

针对高低压配电在线检测系统以前大多采用基于BITBUS或RS485总线构建的监控网络系统所存在的缺点,提出了利用当前在工业控制领域领先的CAN总线技术,完成高低压配电系统的在线检测任务.详细说明了CAN总线通讯方式的优势和原理,介绍了利用CAN总线在线检测技术的主要硬件和软件设计方案及实施方法.     

基于控制器局域网总线技术的工程机械分布式检测系统

介绍了一种基于控制器局域网(CAN)总线的工程机械分布式工况检测系统,重点讨论了基于AT89C52单片机的智能化检测系统智能节点的具体设计.该智能检测节点通过CAN总线与主控计算机相连,构成一种基于CAN总线的分散式高精度工况参数检测系统.完成了工况参数信号测量电路的硬软件设计与通讯模块电路的设计,以及系统的软件开发.该系统的实现方法对其他CAN总线控制模块系统设计,以及其他工程装备分布式检测与控制应用系统的开发都具有一定的参考价值.     

基于CAN总线的车辆单车试风微机控制系统

介绍了一个成功研制的基于CAN总线的分布式控制网络系统.该系统利用遥控器、CAN控制节点、CAN总线、CAN转RS-232通信卡和信息数据库,很好地实现了车辆单车试风微机控制系统中的现场状态检测、遥控和通信功能,并且在SQL Server数据库中实现了数据的长期存储和浏览.     

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...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

Fifth International Summer School on Screw-Theory Based Methods in Robotics

正3-11 September,2014University of Bologna,Bologna,Italy www.summerscrews.org summerscrews2014.ing.unibo.it SUMMER 20SCREWS 14In 2014,our screw-theory school comes to the world's oldest university.In early September,Summer Screws'14 will gather six experts in the application of screw theory in robotics and up to 40 participants at the University of Bologna,Bologna,Italy.The school will teach attendees how to apply existing methods and empower them to develop new ones in their own research.The basic theoretical notions will be introduced in a rigorous manner,emphasizing examples,applications,and exercises.Scholarships are available.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

INDUSTRIAL ENGINEERING AND VISUALISATION-A PRODUCT DEVELOPMENT PERSPECTIVE

Taking the actual project of teaching and researching process for example, the relationship between the industrial engineering and product development is discussed. And use the novel visualization technology to support the industrial engineering and product development. How to use the new computer modeling and simulating technologies to support the product development and industrial engineering, is introduced especially. The support includes both domestic products and industrial systems. The visualization and computer technologies take a very important role in some system or multi-direction modeling, those technologies mentioned above can help the industrial engineers study the effect of design on the whole life circle, including the producing steps. So the engineers can avoid making the wrong decision which may cause bad effects on the whole industrial engineering.     

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...