نتایج جستجو برای: spread effects

تعداد نتایج: 1641382  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده برق و کامپیوتر 1392

سیستم های طیف گسترده(spread spectrum) امروزه به طور وسیعی مورد استفاده قرار می گیرند. این سیستم ها ابتدا توسط ارتش آمریکا و در طی جنگ جهانی دوم مورد استفاده قرار گرفت. در سیستم های طیف گسترده دنباله خطی (direct sequence spread spectrum) سیگنال داده در یک دنباله شبه نویز ضرب می شود تا پهنای باند افزایش یابد. در گیرنده نیز سیگنال دریافتی پس از دمدولاسیون در یک دنباله شبه نویز همانند دنباله موجود ...

Economic imbalances and social disparities are a common feature of developmenteconomies, particularly those which have historical antecedents of colonial rule. The study ofregional imbalances is given focus especially to Southeast Asian countries owing to its renewedimportance in the global order. Post independent India had to tackle with several problems at theoutset, regional imbalance and ec...

Journal: :Physica A: Statistical Mechanics and its Applications 2009

Journal: :IEEE Access 2023

Digital chaotic sequence spread spectrum (CSSS) communication systems provide a number of advantages for secure communications due to the apparent bandlimited Gaussian noise-like signal characteristics and non-repeating nature underlying chipping sequence. The Rayleigh magnitude distribution represents challenge, however, transmission through linear high-power amplifiers (HPA), both high peak-t...

Mohsen soltanpour, Nimal Wijayaratna, Zohreh Hajisalimi,

An oil spill model coupled with a hydrodynamic model was developed to simulate the spread of oil slick in real marine conditions considering the effects of tidal currents, wind and wave. The hydrodynamic model is verified using the measurements of tidal elevations and current speeds at the Persian Gulf. Effect of various governing factors on oil slick movement, tidal currents, wind and wave, ar...

Journal: :journal of physical & theoretical chemistry 2010
f. najafi l. saedi f. mollaamin h. aghaie

in this work, we have studied the solvent effects on values of gibbs free energy, enthalpy. entropy and dipolemoment in spread of solvents around anticancer thug of temreolomide that is an alighting agent. for thispurpose, the quantum mechanic calculations bawd on hanrertnick theory at the sto-36/3-2ith levels havebeen done. moreover, we have compared resulted thermodynamic values in gas phase ...

Journal: :Case Studies in Thermal Engineering 2019

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