京津城际铁路亦庄车站AB类填料路基填筑质量控制

通过京津城际时速350 km客运专线亦庄车站路基工程施工实践,对如何控制AB类填料填筑路基质量,提出了从填料、填筑过程、检测控制三阶段全面质量控制的方法和要点,并介绍了试验段路基冬期施工方法及注意事项,以供同类工程施工参考。     

径向基神经网络的构造理论

通过对径向基神经网络的研究，提出了径向基经网络的构造性理论及其构造算法，在给定函数及其允许误差的条件下，运用本算法能够构造几乎最少隐节点数的径向基神经网络。     

城市地下空间的开发利用与综合管廊建设

1 概述 目前我国城市地下空间建设发展迅速,建设过程中不可避免地会遇到管线改移问题,很多工程因此严重影响工期,另外地下管线的维修及更新换代经常导致地表重复开挖施工,影响交通和环境,最根本的解决措施是修建综合管廊.     

An investigation of the performance of an electronic in-line pump system for diesel engines

WIT Electronic Fuel System Co., Ltd. has developed a new fuel injector, the Electronic In-line Pump （EIP） system, designed to meet China＇s diesel engine emission and fuel economy regulations. It can be used on marine diesel engines and commercial vehicle engines through different EIP systems. A numerical model of the EIP system was built in the AMESim environment for the purpose of creating a design tool for engine application and system optimization. The model was used to predict key injection characteristics under different operating conditions, such as injection pressure, injection rate, and injection duration. To validate these predictions, experimental tests were conducted under the conditions that were modeled. The results were quite encouraging and in agreement with model predictions. Additional experiments were conducted to study the injection characteristics of the EIP system. These results show that injection pressure and injection quantity are insensitive to injection timing variations, this is due to the design of the constant velocity cam profile. Finally, injection quantity and pressure vs. pulse width at different cam speeds are presented, an important injection characteristic for EIP system calibration.     

故障一点通

新款宝来汽滤混装导致汽滤响故障现象:2010年产新款宝来保养后怠速时汽滤部位响。故障排除:升车检查发现汽滤错装。目前新宝来搭载多款发动机,使用的汽油滤清器有三种,而且外观基本一致,不易分清。分别是,备件号:1K0201051C,适用车     

科技改变交通——访厦门金龙联合汽车工业有限公司总经理郭仁祥

《交通世界》：您好，首先祝贺“金龙龙翼杯”驾驶员大赛圆满闭幕，您对此次大赛作何评价？ 郭仁祥：大金龙是客车制造商，这几年在车子的内涵．特别是科技方面，也做了很多研究．有很多成果。”金龙龙翼杯”驾驶员大赛对整个客运业．或者说对整个客车行业有很大帮助。     

27.5kV电气化铁道所用干式变压器的研究

本文介绍了２７．５ｋＶ电气化铁道所用干式变压器的研制过程，论述了所用干式变压器研制中的关键技术问题，以及样机设计、制造中采取的工艺特点，归纳总结了所用干式变压器的性能特点。