نتایج جستجو برای: system engineering
تعداد نتایج: 2413827 فیلتر نتایج به سال:
Purpose: Thesauri as important tools in storage and retrieval information systems have a significant role in the optimization of database search. So the publishing of thesauri needs to use standards as much as possible. I examined and compared two important thesauruses on the basis of ANSI/NISO z39.19 2005. Methodology: This study is an analytical and applied survey. The study population was t...
Objective Adult stem cells which are derived from different tissues, with their unique abilities to self-renew and differentiate into various phenotypes have the potential for cell therapy and tissue engineering. Human adipose tissue is an appropriate source of mesenchymal stem cells with wide differentiation potential for tissue engineering research. In this study isolated stem cells from hum...
Over the past decades, progression in genetic element manipulation, and consequently, the treatment of diseases has been remarkable. It is worth noting that these genetic manipulations perform at different levels, including DNA and RNA. The earlier genomic editing techniques, including MN, ZFN , TALEN , performing their functions by creating double-stranded breaks (DSBs), and after breakage, th...
Reducing the time for engineering changes can greatly shorten a product’s life cycle and improve the productivity of enterprises. This work proposes an approach to engineering change propagation between CAD and product data management (PDM) systems. A system for modeling and triggering changes of models of engineering data, geometries, and features, using STEP AP 214 and AP224, is developed. A ...
Algebraic integral equations is a special category of Volterra integral equations system, that has many applications in physics and engineering. The principal aim of this paper is to serve the numerical solution of an integral algebraic equation by using the Taylor expansion method. In this method, using the Taylor expansion of the unknown function, the algebraic integral equation system becom...
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
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