نتایج جستجو برای: s a multi fractal
تعداد نتایج: 13659343 فیلتر نتایج به سال:
فرض کنیم s تکواره باشد.یک s-عمل راست مجموعه ناتهی aبه همراه یک نگاشت از a×s بهaاست،که در آن تصویر (a,s)به صورت asنمایش داده می شود،به گونه ای که برای هر s,tدر sوaدرa، داشته باشیم (as)t=a(st)وa1=a .به طور مشابه s-عمل چپ تعریف می شود.در این پایان نامه ابتدا تعریف s-عمل تصویری را گسترش می دهیم و s-عمل تصویری ضعیف و (s/i,s/j)- تصویری را معرفی می کنیم .سپس درون بر،هم حاصلضرب و حاصلضرب این عمل ها...
The transmission spectrum of fractal polyadic Cantor superlattice exhibits sharp peaks within forbidden frequency gaps. This property has been exploited by placing such self-similar multi-slab structure in the far field radiation region above a radiating element such as a patch antenna to maximize its directivity at the corresponding transmission peak. A patch antenna having directivity of 30 d...
let g=(v,e) be a graph with vertex set v and edge set e.for two vertices u,v of g ,the closed interval i[u,v] ,consists of u,v and all vertices lying in some u-v geodesic in g.if s is a set of vertices of g then i[s]is the union of all sets i[u,v]for u,v ? s. if i[s]=v(g) , then s is a geodetic set for g.the geodetic number g(g) is the minimum cardinality of geodetic set.the maximum cardinalit...
We study the response of an isolated quantum system governed by Hamiltonian drawn from Gaussian Rosenzweig-Porter random matrix ensemble to a perturbation controlled small parameter. focus on density states, local states and eigenfunction amplitude overlap correlation functions which are calculated exactly using mapping supersymmetric nonlinear sigma model. show that susceptibility fidelity par...
During this decade, the design of small-size wireless communication devices was key topic in the field of communication engineering. The design of miniaturized antenna is an important parameter to reduce the overall size of the wireless communication devices. Many approaches have been proposed to design the miniaturized antennas. Recently, fractal antenna geometry has been employed to design th...
The fractal geometry, issued of a synthesis of works done in Mathematics and in Physics since more of one century, proposed in the 70’s new concepts to understand some complex phenomenon ([Man77]). The notions of fractional dimension and scale invariance have been recognized applicable quickly for the description of many natural objects, of the mountainous to the maritime facades while passing ...
The Ardabil geothermal area is located in the northwest of Iran, which hosts several hot springs. It is situated mostly around the Sabalan Mountain. The Sabalan geothermal area is now under investigation for the geothermal electric power generation. It is characterized by its high thermal gradient and high heat flow. In this study, our aim is to determine the fractal parameter and top and botto...
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