GB/T 12849-1991 钟,表用扭曲向列型液晶显示器件 空白详细规范(可供认证用)

上一篇: GB/T 12840-1996 盒式磁带录音机运带机构 可靠性要求和试验方法
下一篇: GB/T 12841-2000 盒式磁带录音机运带机构通用规范

Product Code:SAE J1750
Title:Describing and Evaluating the Truck Driver's Viewing Environment
Issuing Committee:Truck And Bus Human Factors Committee
Scope:This SAE Recommended Practice establishes three alternate methods for describing and evaluating the truck driver'sviewing environment: the Target Evaluation, the Polar Plot and the Horizontal Planar Projection. The Target Evaluationdescribes the field of view volume around a vehicle, allowing for ray projections, or other geometrically accuratesimulations, that demonstrate areas visible or non-visible to the driver. The Target Evaluation method may also beconducted manually, with appropriate physical layouts, in lieu of CAD methods. The Polar Plot presents the entireavailable field of view in an angular format, onto which items of interest may be plotted, whereas the Horizontal PlanarProjection presents the field of view at a given elevation chosen for evaluation.These methods are based on the Three Dimensional Reference System described in SAE J182a. This document relatesto the driver's exterior visibility environment and was developed for the heavy truck industry (Class B vehicles, class 6, 7,8 vehicles) although the projection principles presented in this document can be applied to any class of motor vehicles.This document is intended to complement SAE J1050a and provides a visual format that can describe the driver's entireviewing environment. This environment can then be analyzed to determine what the driver is capable of seeing. It shouldbe noted that one of the most important factors affecting the driver's field of view and the ability to make validvehicle/design comparisons is the location of the driver's eyepoint. SAE J941 defines the Eyellipse which forms the basisfor eyepoints chosen as the origin for Polar Plots and Horizontal Planar Projections. The Target Evaluation, HorizontalPlanar Projection and Polar Plot create monocular evaluations. Projections/plots of multiple eyepoints must be overlaid tocreate binocular or ambinocular evaluations.Analytical methods for creating Target Evaluations, Polar Plots and Horizontal Planar Projections for direct and indirectvision (planar and spherical convex mirrors) are presented. Note that it is possible to create plots and projections forother mirror surfaces and vision devices if the equations for determining reflection points are provided.

标准名称：	无公害食品 海水蟹
中标分类：	农业、林业 >> 水产、渔业 >> 海水养殖与产品
ICS分类：	食品技术 >> 肉、肉制品和其他动物类食品 >> 鱼和水产品
替代情况：	替代NY 5162-2002
发布部门：	中华人民共和国农业部
发布日期：	2008-05-16
实施日期：	2008-07-01
首发日期：
作废日期：
主管部门：	中华人民共和国农业部市场与经济信息司
提出单位：	中华人民共和国农业部市场与经济信息司
归口单位：	中华人民共和国农业部市场与经济信息司
起草单位：	农业部农产品质量安全中心、国家水产品质量监督检验中心
起草人：	王联珠、丁保华、廖超子、刘天红、翟毓秀、陈思
出版社：	农业出版社
出版日期：	2008-07-01
页数：	6

本标准规定了无公害食品海水蟹的要求、试验方法、检验规则、标志、包装、运输和贮存。
本标准适用于三疣梭子蟹（Portunus trituberculatus）、锯缘青蟹（Scylla serrate）的活品和鲜品，其他海水蟹可参照执行本标准。

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