GB/T 25119-2010 English Translation of Chinese Standard PDF Download
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Author: https://www.codeofchina.com Publisher: https://www.codeofchina.com ISBN: Category : Architecture Languages : en Pages : 48
Book Description
This Standard specifies the requirements of service, design, manufacture, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for durable and reliable equipment. Additional requirements in other standards or specifications may complement this Standard, if applicable. List of subclauses of this Standard in which agreement between the parties is mentioned is detailed in Appendix B. This Standard applies to all electronic equipment for control, regulation, protection, supply, etc. installed on rail vehicles (including subway and urban rail vehicle).The equipment may be powered by the batteries or generators of vehicles or powered by a low-voltage power supply with or without a direct connection to the contact system (transformer, voltage divider and auxiliary power supply).For the purposes of this Standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards. Note: sensors (current, voltage, speed, etc.) and firing unit printed board for power electronic equipment are covered by this Standard. Complete firing units are covered by GB/T 25122.1. This Standard is not applicable to the power electronic equipment in the main circuits and auxiliary circuits.
Author: https://www.codeofchina.com Publisher: https://www.codeofchina.com ISBN: Category : Architecture Languages : en Pages : 48
Book Description
This Standard specifies the requirements of service, design, manufacture, and testing of electronic equipment, as well as basic hardware and software requirements considered necessary for durable and reliable equipment. Additional requirements in other standards or specifications may complement this Standard, if applicable. List of subclauses of this Standard in which agreement between the parties is mentioned is detailed in Appendix B. This Standard applies to all electronic equipment for control, regulation, protection, supply, etc. installed on rail vehicles (including subway and urban rail vehicle).The equipment may be powered by the batteries or generators of vehicles or powered by a low-voltage power supply with or without a direct connection to the contact system (transformer, voltage divider and auxiliary power supply).For the purposes of this Standard, electronic equipment is defined as equipment mainly composed of semiconductor devices and recognized associated components. These components will mainly be mounted on printed boards. Note: sensors (current, voltage, speed, etc.) and firing unit printed board for power electronic equipment are covered by this Standard. Complete firing units are covered by GB/T 25122.1. This Standard is not applicable to the power electronic equipment in the main circuits and auxiliary circuits.
Author: United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) Publisher: United Nations ISBN: 9210600029 Category : Political Science Languages : en Pages : 512
Book Description
This report assesses the levels and effects of exposure to ionizing radiation. Scientific findings underpin radiation risk evaluation and international protection standards. This report comprises a report with two underpinning scientific annexes. The first annex recapitulates and clarifies the philosophy of science as well as the scientific knowledge for attributing observed health effects in individuals and populations to radiation exposure, and distinguishes between that and inferring risk to individuals and populations from an exposure. The second annex reviews the latest thinking and approaches to quantifying the uncertainties in assessments of risk from radiation exposure, and illustrates these approaches with application to examples that are highly pertinent to radiation protection.
Author: Hans de Kroon Publisher: Springer Science & Business Media ISBN: 9783540001850 Category : Science Languages : en Pages : 424
Book Description
In the course of evolution, a great variety of root systems have learned to overcome the many physical, biochemical and biological problems brought about by soil. This development has made them a fascinating object of scientific study. This volume gives an overview of how roots have adapted to the soil environment and which roles they play in the soil ecosystem. The text describes the form and function of roots, their temporal and spatial distribution, and their turnover rate in various ecosystems. Subsequently, a physiological background is provided for basic functions, such as carbon acquisition, water and solute movement, and for their responses to three major abiotic stresses, i.e. hard soil structure, drought and flooding. The volume concludes with the interactions of roots with other organisms of the complex soil ecosystem, including symbiosis, competition, and the function of roots as a food source.
Author: R. Rigler Publisher: Springer Science & Business Media ISBN: 3642565441 Category : Science Languages : en Pages : 375
Book Description
The topics range from single molecule experiments in quantum optics and solid-state physics to analogous investigations in physical chemistry and biophysics.
Author: K. Srujan Raju Publisher: Springer Nature ISBN: 9811514801 Category : Technology & Engineering Languages : en Pages : 881
Book Description
This book features high-quality papers presented at the International Conference on Computational Intelligence and Informatics (ICCII 2018), which was held on 28–29 December 2018 at the Department of Computer Science and Engineering, JNTUH College of Engineering, Hyderabad, India. The papers focus on topics such as data mining, wireless sensor networks, parallel computing, image processing, network security, MANETS, natural language processing and Internet of things.
Author: Marcel Herbst Publisher: Cambridge Scholars Publishing ISBN: 1527523381 Category : Philosophy Languages : en Pages : 224
Book Description
This anthology assembles notes that address a wider spectrum of concern within the social sciences, as well as higher education and design and planning issues. The essays, articles and book reviews gathered here allow for an easy, and holistic, assessment of publications that cover various themes and were written during the past two decades. In addition, four chapters specifically written for this volume are included, two dealing with academic productivity, and the remaining two addressing aspects of economics and issues of design.
Author: United Nations Publications Publisher: ISBN: 9789210613873 Category : Economic indicators Languages : en Pages : 378
Book Description
The Statistical Yearbook is an annual compilation of a wide range of international economic, social and environmental statistics on over 200 countries and areas, compiled from sources including UN agencies and other international, national and specialized organizations. The 2016 edition contains data available to the Statistics Division as of 31 July 2016 and presents them in 26 tables on topics such as: communication; crime; development assistance; education; energy; environment; finance; gender; international merchandise trade; international tourism; labor force; national accounts; population and migration; price and production indices; and science and technology. Most tables covering the period up to 2016. Accompanying the tables are technical notes providing brief descriptions of major statistical concepts, definitions and classifications.
Author: https://www.codeofchina.com
Author: https://www.codeofchina.com
Author: Dr. Meng Yongye
Author: United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR)
Author: Hans de Kroon
Author: R. Rigler
Author: K. Srujan Raju
Author: Codeofchina
Author: Marcel Herbst
Author: John Coleman Fergusson
Author: United Nations Publications