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GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values

Standard Number:  GB/T 8170-2008
Title:  Rules of rounding off for numerical values & expression and judgement of limiting values
Language:  Simplified Chinese
Publication Date:  2008/7/16
Execute Date:  2009/1/1
Status:  Current
Standard Type:  Management
CCS Classification for Standardscomprehensive>>Basic subjects>>mathematics
Publisher:  Chinese Standards(GB)
Number of Pages:10  

Preface: This standard is in GB/T8170-1987 the numerical revised rules and GB/T1250-1989 numerical representation of the limit and determination methods of integration on the basis of the revised. This standard instead of GB/T8170-1987 and GB/T1250-1989. This standard and GB/T 8170-1987 and GB/T1250-1989, technical content of the major changes include: according to GB/T1.1-2000 "the standardization work guide, part 1: the structure of the standard and write rules" the requirements of the standard format for the modification; - numerical revised and added terms Limit value, modify the definition of revised interval, deleted the term effective digits, 0.5 units with about 0.2 unit trim around; - in chapter 3 numerical about rules in the specified will delete numerical trim around into a significant digits related content, keep specified digital situation; - if necessary, on the top right-hand corner revised numerical instead of numerical values After, plus symbol or -, said house or into its value; - on the determination of value or its computation compared with the limit value of two kinds of methods, increase when standards or relevant documents using a comparative method, once determined, shall not change; Delete the content of the absolute limit value; - take about in use Method comparison, emphasized when test or calculation accuracy allowed, should first will get the revised figures of numerical specified one or a few quote us more, and then according to the procedures as prescribed by the treaty to 3.2 digits. This standard by the China institute of standardization is put forward. This standard by the national standardization technical committee under centralized statistical method application. This standard draft list : China standardization institute, institute of mathematics and systems science, Chinese academy of sciences, guangzhou product quality supervision and inspection, in wuxi city product quality supervision, inspection, fuzhou spring tea industry co., LTD. This standard drafters: led by, Yu Zhenfan, feng shiyong, Deng Sui, hua-ying Chen, fu xing, Ding Wenxing, party China dragon.   
Description:This standard to fix some numerical code, the limit values of representation and determination methods, the language and symbols, and the determination of value or the calculation with the limit value stipulated in the standard comparison method.
this standard applies to the science, technology and production activities in the test and calculated values. When the numerical need to be revised, should be in accordance with the rules of this standard are given.
this standard applies to all kinds of standard or other technical specifications Write and the judgement of the result of the test.  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  508KB
Tile in English:  Rules of rounding off for numerical values & expression and judgement of limiting values

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