IEC Scheme for Certification to Standards relating to Equipment for use in Explosive Atmospheres (IECEx Scheme) - Guidance for making applications for and use of IECEx Conformity Mark
发布日期:2008-07-28 实施日期:2008-07-28
Optical amplifiers - Test methods - Part 4-2: Gain transient parameters - Broadband source method
适用范围:IEC 61290-4-2:2011 applies to optical amplifiers (OAs) and optically amplified elementary sub-systems. More specifically, it applies to OAs using active fibres (optical fibre amplifiers, OFAs) containi...
发布日期:2011-07-13 实施日期:2011-07-13
实施日期:2011-04-30
Methods of measurement for power gain of low noise travelling wave tubes ...
实施日期:1973-07-01
Indicators for monitoring and assessment of socio-economic impacts of the natural forest protection program
适用范围:本标准规定了中国天然林资源保护工程社会经济效益监测与评价的对象、形式、监测与评价的核心指标及其权重和评价方法。本标准适用于中国天然林资源保护工程的社会经济效益监测与评价。
发布日期:2008-09-03 实施日期:2008-12-01
Empfangsantennen fuer Satelliten-Rundfunkuebertragung im 11/12-GHz-Bereich. Elektrische Messungen Receiving Antennas for Satellite Broadcast Transmissions in the 11/12 GHz Band-Part 1:Electrical Measur...
适用范围:Antennas, Communication equipment, Receivers, Satellite links, Radiocommunication, Frequencies, Television antennas, Frequency measurement, Electrical measurement, Electromagnetic radiation, Electrical...
实施日期:1999-06-15
Elektroakustische Geraete. Verfahren zur Festlegung und Messung der Kennwerte von Regelverstaerkern (Kompressoren und Begrenzer) Sound System Equipment Part 8:Methods for Specifying and Measuring the C...
适用范围:Devices for limiting and/or compressing properties are included, but expanders, clipping devices, and gain control using an external source are not included. To be read in conjunction with BS 5428:Part...
实施日期:1988-01-01
Regulation for economic benefit analysis calculation and evaluation of existing flood control projects
实施日期:1998-05-01
Benefit calculation to determine the mining and processing of low-grade ore of copper mine
适用范围:本标准规定了铜矿山低品位矿石采选效益计算方法,低品位矿石采选经济临界品位的计算方法以及铜多金属矿伴生可利用组分的折算方法。 本标准适用于露天、地下、露天及地下联合采选的铜矿山企业低品位矿石采选效益计算。
发布日期:2013-11-27 实施日期:2014-08-01
Economic evaluating methods for petroleum enterprise s energy-saving technical innovation project
适用范围:本标准规定了节能技措项目经济评价方法的原则、步骤、指标及其计算方法。本标准适用于石油企业节能技措项目经济效益的评价。其他企业节能技措项目可参照执行。
发布日期:2009-12-01 实施日期:2010-05-01
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