نتایج جستجو برای: k out of n sub systems
تعداد نتایج: 21408122 فیلتر نتایج به سال:
this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...
در این مقاله مدل جدیدی برای مسئله تخصیص افزونگی با ساختار سری- موازی و زیر سیستمهای k-out-of-n با در نظر گرفتن هزینهای جهت کاهش نرخ خرابی ارائه شده که در آن دو سیاست افزونگی آماده به کار سرد و فعال به عنوان متغیر تصمیم برای هر یک از زیر سیستم ها در نظر گرفته شده است. هدف از حل مدل ارائه شده، تعیین سیاست افزونگی، نوع و تعداد اجزاء مازاد تخصیص یافته و نیزضریب کاهش نرخ خرابی هر زیر سیستم برای حد...
Blind channel estimation for MIMO-OFDM systems was discussed, and a subspace based blind channel estimation algorithm by re-constructing the received signal and its simplified one were proposed. The algorithm changed the channel matrix of the transfer function into a block Toeplitz high matrix exploiting OFDM cyclic prefix, and the channel estimation characteristic equation was obtained with th...
abstract this research has been carried out with the purpose of investigating the conditions and related elements of the employment of the educational sciences graduates of hamedan province universities in 1382-1387 academic years. it has been a descriptive research of a correlation kind, and the population number has been 1180 grduates of payam- e noor universites in asad – abaad, kaboudaraha...
The promoted K-La nanocatalysts supported on ZSM-5 zeolite were prepared via wetness impregnation method and tested for biodiesel production from soybean oil. The effects of different weight percentage of La, loading of K as a promoter and calcination conditions on structure and activity of catalyst were investigated. Results showed that the supported catalyst containing 7wt.% of La was pro...
Design optimization and redundant dependency study of series k — out — of — n : G repairable systems
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