نتایج جستجو برای: nicolsons scheme

تعداد نتایج: 222639  

Journal: :The Biochemist 2009

Journal: :Bulletin of the Royal College of Psychiatrists 1979

Journal: :Science 2020

Journal: :Advances in Science, Technology and Engineering Systems Journal 2017

a watermarking scheme for Grayscale image isproposed based on a family of the chaotic maps and discretecosine transform. Jacobian Elliptic mapis employed to encrypt ofwatermarked logo. Piecewise nonlinear chaotic map is also usedto determine the location of DCT coefficients for the watermarkembedding. The purpose of this algorithm is to improve theshortcoming of watermarking such as small key s...

Salahi,

  Semidefinite optimization relaxations are among the widely used approaches to find global optimal or approximate solutions for many nonconvex problems. Here, we consider a specific quadratically constrained quadratic problem with an additional linear constraint. We prove that under certain conditions the semidefinite relaxation approach enables us to find a global optimal solution of the unde...

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