Reliability Assessment under Uncertainty Using Dempster-Shafer and Vague Set Theories

  • سال انتشار: 1386
  • محل انتشار: نخستین کنگره بین المللی مدیریت ریسک
  • کد COI اختصاصی: RMIC01_098
  • زبان مقاله: فارسی
  • تعداد مشاهده: 1847
دانلود فایل این مقاله

نویسندگان

Saeid Pashazadeh

Iran University of Science and Technology Department of Computer Engineering Zip۱۶۸۴۶-۱۳۱۱۴, Narmak, Tehran, IRAN

Najaf Gharachourlou

ACECR East Azarbijan Tabriz Univ, ۲۹ Bahman, Tabriz, IRAN

چکیده

Reliability analysis of a system in design stage requires expert’s estimations and statistical data with various degrees of epistemic uncertainty and doing aggregation in a coherent framework. Dempster-Shafer (DS) theory is potentially valuable tool for combination of evidence obtained from multiple different sources. One approach for fuzzy reliability assessment is using Vague set (VS) theory. DS theory has many similarities with VS theory. Uncertain raw data for component reliability of a system can be combined using different combination methods of DS theory and can be represented in the form of triangular fuzzy vague number. Using the proper methods and equations, the fuzzy reliability of the system can be compute with triangular vague numbers of components reliability. Combining these two theories eliminates the gap between the representation of combined evidences and the way of representing the reliability of components in the VS theory for reliability assessment. Our method eliminates this gap in very convenient form. Because of closed relevance of these two theories we can represent the output of DS combination in the form of vague triangular number in the VS theory. With this method we eliminate the loss of meaningful information in this conversion.

کلیدواژه ها

Dempster-Shafer theory, Vague set theory, Fuzzy system reliability, Uncertainty, Triangular fuzzy number

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.