基于互补分裂谐振环的零阶谐振微带带通滤波器的设计

文章介绍了以互补分裂谐振环和一系列沟道组成的LHM为单元的零阶谐振系统（ZOR）,并给出了此系统共振频率和导纳斜率参数的确定方法。描述了由带有J－变案频器的ZOR组成的带通滤波器的设计方法。     

Proposal for an Inundation Hazard Index of Road Links for Safer Routing Services in Car Navigation Systems

Inundation of roads by heavy rainfall has attracted more attention than traffic accidents, traffic congestion, and construction because it simultaneously causes travel delays and threatens driver safety. For these reasons, in this paper, we propose an inundation hazard index (IHI) of road links, which shows the possibility of inundation of road links caused by rainfall. To generate the index, we have used two key data sources, namely the digital elevation model (DEM) and past rainfall records of when inundation has occurred. IHI is derived by statistically analyzing the relationships between the normalized relative height of the road links calculated from DEM within the watershed and past rainfall records. After analyzing the practical applicability of the proposed index with a commercial car navigation system through a set of tests, we confirmed that the proposed IHI could be implemented to choose safer routes, with reduced chances of encountering roads having inundation risks.s     

轿车铝合金油泵壳体液态挤压工艺

采用液态挤压代替压力铸造及热模锻生产轿车铝合金油泵壳体,不仅克服了压铸件内部容易形成气孔和氧化夹杂的缺陷,而且减少了热模锻的投资及提高了材料利用率。本文介绍了铝合金油泵壳体液态挤压的模具结构及设计参数、技术经济分析。     

ZrO_2基氧传感器在汽车尾气净化中的应用

重点介绍了以ＺｒＯ２ 为代表的陶瓷基固体电解质氧传感器在汽车尾气净化中的工作原理及作用,指出了我国目前的发展现状及存在的问题。     

Car buyers and fuel economy?

This research is designed to help researchers and policy makers ground their work in the reality of how US consumers are thinking and behaving with respect to automotive fuel economy. Our data are from semi-structured interviews with 57 households across nine lifestyle “sectors.” We found no household that analyzed their fuel costs in a systematic way in their automobile or gasoline purchases. Almost none of these households track gasoline costs over time or consider them explicitly in household budgets. These households may know the cost of their last tank of gasoline and the unit price of gasoline on that day, but this accurate information is rapidly forgotten and replaced by typical information. One effect of this lack of knowledge and information is that when consumers buy a vehicle, they do not have the basic building blocks of knowledge assumed by the model of economically rational decision-making, and they make large errors estimating gasoline costs and savings over time.     

Economic Indicators

Currency exchanges rates – updated monthly. Economic indicators of industrial production. Countries included: France, Germany, Italy, the United Kingdom, the United States, Canada, Japan (Total G-7), Eurozone and Total EU-28 (Total OECD). Updated monthly. Economic indicators of car registration in the United States, Canada, France, Germany, Italy, Poland, Spain, Turkey, the United Kingdom, Japan, Republic of Korea and Other OECD (Total OECD-30). Updated monthly. Monthly averages of crude steel production in thousand metric tons for the United States, Canada, Brazil, Mexico, Austria, Belgium, Czech Republic, France, Germany, Italy, Netherlands, Poland, Spain, Sweden, Turkey, the United Kingdom, Russia, Ukraine, South Africa, Iran, China, India, Japan, Republic of Korea, Taiwan and Australia.     

青藏发电车柴电装置燃油系统设计

青藏高原环境的恶劣,使得青藏发电车上柴油发电装置的燃油系统设计面临一系列问题。本文针对设计过程中所面临的各项高原环境特有的问题,逐步展开对燃油系统部件的设计,并在设计中合理有效的解决了这些问题。     

安森美半导体专为车载网络优化的解决方案

本文介绍了安森美半导体用于车载网络的创新解决方案,包括CAN收发器NCV7341,LIN收发器NCV7321,以及系统级芯片NCV7420/25 LIN-SBC等。     

翻车机液压系统的应用特性

Ｃ型转子式翻车机和侧倾式翻车机均采用了液压压车装置,该文在介绍其结构组成的前提下,论述各液压系统的组成,工作原理及其特性。     

工艺强化后传动系齿轮疲劳寿命增长潜力的研究

为了探索工艺强化后齿轮疲劳寿命的增长潜力,采用轿车齿轮实物物理试验的方法,比较系统地研究某轿车齿轮在低幅载荷作用下结构疲劳寿命的改变,证实低幅应力区内存在一个强化载荷区。用强化载荷区内的不同载荷对齿轮进行预锻炼,齿轮的疲劳寿命会有不同程度的提高,最高可使疲劳寿命提高一倍。在试验结果的基础上,通过数值插值,进一步反映出强化后齿轮疲劳寿命的变化趋势,为摸索利用磨合工序提高齿轮的疲劳寿命提供技术依据。