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BS ISO 21459-2006 空间数据和信息传输系统.接近1的空间链接协议.编码和同步传输内层

上一篇: BS ISO 22644-2006 航天数据和信息传送系统.轨道数据文电
下一篇: BS ISO 20683-1-2006 飞行器地面设备.带前起落架的无牵引杆牵引车辆(TLTV)的设计、试验和维修.干线飞行器

标准名称：	粗铅化学分析方法 银量的测定 火焰原子吸收光谱法
英文名称：	Methods for chemical analysis of crude lead-Determination of silver content-Flame atomic absorption spectrometric method
中标分类：	冶金 >> 金属化学分析方法 >> 重金属极其合金分析方法
ICS分类：	冶金 >> 有色金属 >> 铅、锌、锡及其合金
替代情况：	替代YS/T 248.9-1994
发布部门：	中华人民共和国国家发展和改革委员会
发布日期：	2007-04-13
实施日期：	2007-10-01
首发日期：
作废日期：
提出单位：	全国有色金属标准化技术委员会
归口单位：	全国有色金属标委会
起草单位：	株洲冶炼集团有限责任公司
起草人：	焦萍、杨红生
出版社：	中国标准出版社
出版日期：	2007-10-01
页数：	平装16开 页数：6, 字数：7千字

本部分规定了粗铅中银量的测定方法。本标准适用于粗铅中银量的测定。

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Product Code:SAE J1490
Title:Measurement and Presentation of Truck Ride Vibrations (STABILIZED May 2011)
Issuing Committee:Truck And Bus Total Vehicle Steering Committee
Scope:There are two ways to assess the characteristics of ride vibrations of a vehicle during its operation. Subjective evaluation and objective measurement. Subjective assessments of the ride vibrations experienced by drivers during ride evaluations are generally performed by a panel of drivers and/or passengers who are instructed to operate or ride a group of vehicles in a predetermined manner in order to subjectively assess the levels and characteristics of ride vibrations. Figures 6A through 6C show examples of subjective evaluation forms presently in use. The disadvantages of the subjective method include need for careful experimental design, need for statistically unbiased samples, complexity of human perceptions of vibrations, and difficulty in comparing qualitative data of vehicles evaluated at different times and/or by different groups of people. Often ride characterization is not an easy task using only qualitative or descriptive terms. Therefore, it is necessary and desirable to develop objective techniques to enable ride engineers and others to measure ride vibrations during ride assessment in a quantitative manner.This recommendation details a uniform method for the measurement of ride vibrations of all Class 7 and 8 commercial vehicles, including both combination vehicles and straight trucks. Vibrations are to be measured utilizing cab and seat-pad mounted accelerometers in vertical (z axis) and fore/aft (x axis) directions. The measurement in lateral direction (y axis) is optional as these vibrations from a ride assessment standpoint are seldom significant in commercial vehicles. Several currently utilized methods of displaying, analyzing, and combining the measured accelerations are presented.This recommendation does not make any statements concerning how well any of the objective ride measures will correlate to subjective evaluations of ride, nor does it deal with any limits or establish any desirable values for acceptable ride.It is recognized that objective ride evaluation methods have some disadvantages due to the complexities of these measures, sophistication of instrumentation and analysis techniques, etc. Therefore, it is recommended that technically trained personnel conduct the objective tests and analyze the data.

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