摩托车Ⅲ阶段噪声标准研讨会在西安召开

3月24日,国家摩托车质量监督检验中心在西安主持召开了《摩托车和轻便摩托车行驶噪声限值及测量方法（中国Ⅲ阶段）》研讨会。来自国家环保部、国家摩托车质量监督检验中心（天津）、国家机动车质量监督检验中心（上海）及五羊本田（广州）摩托车有限公司、江门市大长江摩托车有限公司的专家和代表参加此次研讨会。     

The measure and decision of technical risk in the development of naval vessels

The risks in development of navy vessels were explored, The resources of technical risk in the design and development of vessels were mentioned, It was pointed that technical risk dominated the other risk components. Based on the writers＇ understanding and experience from risk analysis and risk ,nanagement to the development of a navy vessel, four measure indexes of technical risk were presented. The decision criteria and the rules corresponding to the indexes were estahlished by the statistic information,     

Study of the helicopter blade running elevation measurement system

Helicopter blade running elevation measurement is an important measure target in helicopter blade dynamic balance experimentation. The elevation influences the helicopter＇ s security and other performance capabilities. In testing, however, it has been difficult to measure the elevation when the rotor reaches high speeds. To get a simple, fast and highly accurate measurement system, photo electricity technology was applied to measuring the blade running elevation. Discussed is the measurement principle of blade running elevation, tire design of the measurement system and analysis of the measurement precision.     

摩托车自动变速离合器性能参数的测量方法与精度分析

以摩托车自动变速离合器的主动轴力矩,从动轴力矩,主动轴转速,从动轴转速,带轮转速等性能参数的实际测试过程为基础,讨论了这些参数的具体测量方法和测量精度问题。     

中欧轻型汽车多工况行驶车外噪声测量方法差异分析

概述了推荐性国家标准《轻型汽车多工况行驶车外噪声测量方法》(报批稿)与联合国欧洲经济委员会UN Regulation No.51噪声法规附录7附加噪声排放规定(最新草案)的技术背景,分析了在适用范围、术语定义、测量仪器设施、环境条件、车辆准备、测量边界条件、测量挡位、车辆操作、测量结果处理等方面存在的主要差异及存在这些...     

三角高程法测量在富民桥中的应用与精度分析

结合沈阳市富民桥的工程实践,介绍三角高程测量的几种方法及其精度分析.     

关于实施国家第二阶段机动车排放标准的公告

为贯彻《中华人民共和国大气污染防治法》，严格控制机动车污染排放，实施《车用压燃式发动机排气污染物排放限值及测量方法》(GB17691-2001)和《车用点燃式发动机及装用点燃式发动机汽车排气污染物排放限值及测量方法》(GB14762-2002)第二阶段排放限值，现公告如下：