Technical requirements for the selection of rail grades
نویسندگان
چکیده
The most common types of rail defects on modern railway lines occur due to the rolling contact fatigue steel. One methods slow down development these is application new steel grades with increased hardness in curves larger radii and other characteristic track sections. Serbian standard SRPS EN 13674-1:2017 - Railway applications Track Rails Part 1: Vignole rails 46 kg/m above comprises nine perlite from 200 440 HBW. Infrastructure Managers were increasingly applying hardnesses ≥ 350 HBW order extend life cycle track. paper presents UIC recommendations regarding quality based results latest research practical experience.
منابع مشابه
the test for adverse selection in life insurance market: the case of mellat insurance company
انتخاب نامساعد یکی از مشکلات اساسی در صنعت بیمه است. که ابتدا در سال 1960، توسط روتشیلد واستیگلیتز مورد بحث ومطالعه قرار گرفت ازآن موقع تاکنون بسیاری از پژوهشگران مدل های مختلفی را برای تجزیه و تحلیل تقاضا برای صنعت بیمه عمر که تماما ناشی از عدم قطعیت در این صنعت میباشد انجام داده اند .وهدف از آن پیدا کردن شرایطی است که تحت آن شرایط انتخاب یا کنار گذاشتن یک بیمه گزار به نفع و یا زیان شرکت بیمه ...
15 صفحه اولIdentifying the technical requirements for designing health portals
Aim: Considering technical requirements in the design of health portals increases the validity of information. This study identified the technical and content structure required to create these portals. Methods: This was a qualitative study which was conducted in 2020. A combination of comprehensive review and interview was used. The search was performed in Elsevier, EBSCO, Scopus, Web of Scie...
متن کاملstudy of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
the use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
15 صفحه اولfacilitating lexical access for the fluent production of speech
the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis , a one- way anova experimental design was carried out. 24 senior student of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inte...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Tehnika
سال: 2022
ISSN: ['2560-3086', '0040-2176']
DOI: https://doi.org/10.5937/tehnika2202165p