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标准名称：	MOS场效应晶体管热敏参数快速筛选试验方法
英文名称：	Rapid screening test methods for Thermal sensitive parameter of MOS field effect transistor
中标分类：
发布部门：	中华人民共和国信息产业部
发布日期：	2000-10-20
实施日期：	2000-10-20
首发日期：	1900-01-01
作废日期：	1900-01-01
提出单位：	中华人民共和国信息产业部
归口单位：	中国电子技术标准化研究所
起草单位：	杭州电源技术研究所
起草人：	叶奇放、易本健、赵英等
出版社：	工业电子出版社
出版日期：	2000-10-20
页数：	5页

本规范规定了MOS场效应晶体管热敏参数快速筛选的试验方法。
本规范适用于MOS场效应晶体管（以下简称电阻器）热敏参数快速筛选。

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GB/T 4586-1994 半导体器件 分立器件 第8部分：场效应晶体管

Product Code:SAE J1490
Title:Measurement and Presentation of Truck Ride Vibrations
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.