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GB/T 38902-2020 English PDF

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US$259.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 38902-2020: Determination of hollow fiber membrane cross-section dimensions - Image analysis method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 38902-2020	259	Add to Cart	3 days	Determination of hollow fiber membrane cross-section dimensions - Image analysis method	Valid

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Basic data

Standard ID: GB/T 38902-2020 (GB/T38902-2020)
Description (Translated English): Determination of hollow fiber membrane cross-section dimensions - Image analysis method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G85
Classification of International Standard: 71.040.01
Word Count Estimation: 14,198
Date of Issue: 2020-06-02
Date of Implementation: 2021-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 38902-2020: Determination of hollow fiber membrane cross-section dimensions - Image analysis method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of hollow fiber membrane cross-section dimensions - Image analysis method ICS 71.040.01 G85 National Standards of People's Republic of China Determination of the cross-sectional structure dimensions of hollow fiber membrane filaments Image analysis 2020-06-02 release 2021-04-01 Implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed and managed by the National Separation Membrane Standardization Technical Committee (SAC/TC382). This standard was drafted by. Tianjin Institute of Seawater Desalination and Comprehensive Utilization of the Ministry of Natural Resources, Sanda Membrane Technology (Xiamen) Co., Ltd., Beijing Jun Yi Technology Co., Ltd., Shandong Jinhui Membrane Technology Co., Ltd., Shandong Zhaojin Motian Co., Ltd., Guangzhou Chinese Academy of Sciences Advanced Technology Research Institute, Hangzhou Easy Membrane Environmental Protection Technology Co., Ltd., Zhejiang Changxing Qiushi Membrane Technology Co., Ltd., Hainan Lisheng Water Purification Technology Industrial Co., Ltd. Company, Tianjin Momentum Technology Co., Ltd., Zhejiang Jinmum Environment Technology Co., Ltd., Tianjin Momentum Technology Co., Ltd. The main drafters of this standard. Wang Xuliang, Pan Xianhui, Li Zongyu, Zhang Yanping, Chen Huiying, Zhang Mo, Song Yuzhi, Wang Leyi, Chen Shunquan, Wang Yanfeng, Zhang Xingxing, Chen Chen, Hu Xiaoyu, Wang Xi, Zhang Bingtao, Sun Wenting, Xu Yinong, Xi Xuejie, Liu Yang. Determination of the cross-sectional structure dimensions of hollow fiber membrane filaments Image analysis

1 Scope

This standard specifies the method for measuring and calculating the diameter and wall thickness of hollow fiber membrane filaments using image analysis. This standard applies to the determination of the cross-sectional structural dimensions of hollow fiber membrane filaments. Note. The "diameter" referred to in this standard includes the outer and inner diameters of the membrane wire, and the equivalent circular area diameter for non-circular cross-sections.

2 Normative references

The following documents are essential for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document. GB/T 21649.1-2008 Granularity analysis image analysis method Part 1.Static image analysis method

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Hollow fiber membrane holowfibermembrane Fibrous, hollow membrane with self-supporting effect. Note. For reverse osmosis membranes, the skin is on the outer surface; for ultrafiltration membranes and microfiltration membranes, the skin is on the inner surface, outer surface, or inner and outer surfaces. [GB/T 20103-2006, definition 2.1.28] 3.2 Pixel The independent unit in the digitized image is a uniform area divided by horizontal and vertical directions. [GB/T 21649.1-2008, definition 3.1.11] 3.3 Grayscale image Each pixel has an image with different gray levels. [GB/T 21649.1-2008, definition 3.1.8] 3.4 Binary Binary A digital image is composed of a series of pixels with a value of 0 or 1, and these values are usually displayed as two areas of light and dark on the visual screen, or It is represented by two different colors of pseudo-color images. [GB/T 21649.1-2008, definition 3.1.3] 3.5 Threshold segmentation thresholdsegmentation By setting different feature thresholds, the image pixels are divided into several categories. Note. Includes grayscale or color features directly from the original image, as well as features derived from the original grayscale or color value transformation. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 38902-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 38902-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 38902-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 38902-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.