نتایج جستجو برای: quadratic alpha
تعداد نتایج: 249291 فیلتر نتایج به سال:
در این پایان نامه به مطالعه یک مسئله مربوط به طراحی شبکه های بی سیم با استفاده از آنتن های جهت دار پرداخته می شود. مسئله را به صورت مجموعه p از n نقطه در صفحه، هر یک متناظر با یک فرستنده و گیرنده مجهز به یک آنتن جهت دار با زاویه آلفا و شعاع r مدل می کنیم. نشان داده می شود که اگر $alpha = pi /3$ باشد آن گاه همیشه جهت یابی از آنتن های جهت دار با زاویه $alpha $ امکان پذیر است به طوری که گراف ارتبا...
در این پایان نامه, یک روش تحلیلی عددی برای حل معادله دیفرانسیل جزئی خطی و غیرخطی از مرتبه کسری بفرم $ _{t_{0}}^{c} d_{t}^{alpha}u(x,t)=f(x,t,u(x,t)) $ با شرط اولیه $ u(x,0)=f(x) $ را بررسی می کنیم که در آن _{t_{0}}^{c}d_{t}^{alpha} مشتق از مرتبه کسری از نوع مشتق کاپوتو و $ 0<alphaleq 1 $ می باشد. در این کار, روش تبدیل دیفرانسیل تعمیم یافته (gdtm) ر...
Using gravitational wave observations to search for deviations from general relativity in the strong-gravity regime has become an important research direction. Chern Simons (CS) gravity is one of most frequently studied parity-violating models strong gravity. It known that Kerr black-hole not a solution CS At same time, only rotating available literature dynamical (dCS) slow-rotating case accur...
BACKGROUND There is growing interest in neurofeedback as a treatment for major depressive disorder. Reduction of asymmetry of alpha-activity between left and right prefrontal areas with neurofeedback has been postulated as effective in earlier studies. Unfortunately, methodological shortcomings limit conclusions that can be drawn from these studies. In a pilot-study, we investigated the effecti...
PURPOSE To evaluate the linear quadratic (LQ) model for hypofractionated radiotherapy within the context of predicting radiation pneumonitis (RP) and to investigate the effect if a linear (L) model in the high region (LQL model) is used. METHODS AND MATERIALS The radiation doses used for 128 patients treated with hypofractionated radiotherapy were converted to the equivalent doses given in fr...
Working memory (WM) can be defined as the ability to maintain and process physically absent information for a short period of time. This vital cognitive function has been related to cholinergic neuromodulation and, in independent work, to theta (4-8Hz) and alpha (9-14Hz) band oscillations. However, the relationship between both aspects remains unclear. To fill this apparent gap, we used electro...
We propose the generic no-scale inflation inspired from string theory compactifications. consider K\"ahler potentials with an inflaton field $\ensuremath{\varphi}$, as well one, two, and three moduli. Also, we renormalizable superpotential of $\ensuremath{\varphi}$ in general. study spectral index tensor-to-scalar ratio details, find viable parameter spaces which are consistent Planck BICEP/Kec...
The presence of exotic matter for the existence wormhole geometry has been an unavoidable problem in GR. In recent studies researchers have tried to deal with this issue using modified gravity theories where WH is explained by extra curvature terms and NEC's are not violated signifying standard geometry. present article we trying find solutions traversable wormholes normal throat within framewo...
Divergences, also known as contrast functions, are distance-like quantities defined on manifolds of non-negative or probability measures and they arise in various theoretical and applied problems. Using ideas in optimal transport, we introduce and study a parameterized family of $L^{(\pm \alpha)}$-divergences which includes the Bregman divergence corresponding to the Euclidean quadratic cost, a...
We construct a class of codes of length such that the minimum distance outside of a certain subcode is, up to a constant factor, bounded below by the square root of , a well-known property of quadratic residue codes. The construction, using the group algebra of an Abelian group and a special partition or splitting of the group, yields quadratic residue codes, duadic codes, and their generalizat...
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