【英文标准名称】:Personaleyeprotection.Sunglassesandsunglarefiltersforgeneraluse.
【原文标准名称】:个人眼睛保护.一般用途的太阳镜和太阳强光滤波器
【标准号】:NFS77-114-1997
【标准状态】:作废
【国别】:法国
【发布日期】:1997-03-01
【实施或试行日期】:1997-03-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:眼镜(夹鼻);防护服装;太阳辐射;规范(验收);测量条件;透射率;作标记;折射指数;数学计算;物理性能;黑滤光镜;光学特性;太阳镜;定义;;测量;精密机械;特性;光学;机械性能;护目器
【英文主题词】:
【摘要】:
【中国标准分类号】:C73
【国际标准分类号】:13_340_20
【页数】:31P;A4
【正文语种】:其他
基本信息
| 标准名称： | 空盒气压计 |
| 英文名称： | Aneroid barograph |
| 中标分类： |
综合 >>
基础学科 >>
气象学 |
| ICS分类： |
数学、自然科学 >>
地质学、气象学、水文学
|
| 发布部门： | 中国气象局 |
| 发布日期： | 2004-11-01 |
| 实施日期： | 2005-04-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 归口单位： | 中国气象局 |
| 起草单位： | 中国气象局 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 1900-01-01 |
| 页数： | 16开， 页数：11， 字数：16千字 |
适用范围
本标准规定了空盒气压计的技术要求、试验方法、检验规则及标志、包装、运输、储存等。本标准适用于连续记录大气压力的日记型和周记型空盒气压计。
前言
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目录
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引用标准
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所属分类： 综合 基础学科 气象学 数学 自然科学 地质学 气象学 水文学
Product Code:SAE AIR1989
Title:Helicopter External Noise Estimation
Issuing Committee:A-21 Aircraft Noise Measure Noise Aviation Emission Modeling
Scope:This method estimates noise for both single and tandem main rotor helicopters except for approach where it applies to single rotor designs only. It does not apply to coaxial rotor designs. Due to lack of available data, application of the method has not been evaluated for application to tiltrotor, or other VTOL configurations, when operating in the helicopter mode. Since there are substantial differences between helicopter rotors included in the data base, and tiltrotor rotors, aplication to VTOL configurations other than helicopters is not advised. Application is limited to helicopters powered by turboshaft engines and does not apply to helicopters powered by reciprocating engine, tip jets or other types of power plants. It provides noise information using basic operating and geometric information available in the open literature. To keep the method simple, it generates A-weighted sound levels, and Sound Exposure Levels precluding the necessity for spectral details. The metod prescribes estimates for typical helicopter operations; certain maneuvers may produce noise levels different from those estimated. Estimates are given for the maximum sound levels at 1.2 m (4 ft) height above the ground. For aircraft in forward flight, the estimate is given for an aircraft at an altitude of 152 m (500 ft) on a path directly over the observer. For an aircraft in hover the estimate is given for an aircraft hovering 3.3 m (10 ft) above ground level at a distance of 152 m (500 ft) to the side of the observer. No estimate is provided for Sound Exposure Level in hover since the time duration is indeterminate.