Hybrid evolutionary computational technique is developed to jointly estimate the amplitude, frequency, range, and 2D direction of arrival (elevation and azimuth angles) of near-field sources impinging on centrosymmetric cross array. Specifically, genetic algorithm is used as a global optimizer, whereas pattern search and interior point algorithms are employed as rapid local search optimizers. F...

In this paper, we propose a method for extracting an object region from an image. First, we investigate the properties of the Intelligent Scissors (IS) method, which has been proposed as a method for extracting contours. As a result, we verify that the IS method’s route search according to total cost requires multiple seed points to extract a complex contour. Next, we show that this problem can...

Online optimization has emerged as powerful tool in large scale optimization. In this paper, we introduce efficient online optimization algorithms based on the alternating direction method (ADM), which can solve online convex optimization under linear constraints where the objective could be nonsmooth. We introduce new proof techniques for ADM in the batch setting, which yields a O(1/T ) conver...

This article focused on the stress analysis of an edge crack in a thin hallow rotating functionally graded material (FGM) disk. The disk is assumed to be isotropic with exponentially varying elastic modulus in the radial direction. A comprehensive study is carried out for various combinations of the crack length and orientation with the different gradation of materials. The effect of non-unifor...

We prove a Beale-Kato-Majda criterion for the loss of regularity for solutions of the incompressible Euler equations in Hs(R3), for s > 5 2 . Instead of double exponential estimates of Beale-Kato-Majda type, we obtain a single exponential bound on ‖u(t)‖Hs involving the dimensionless parameter introduced by P. Constantin in [2]. In particular, we derive lower bounds on the blowup rate of such s...

1 Anscombe’s term for such knowledge in Intention is “practical knowledge”. However, I have avoided that term as I wish to defend the idea that agents have a distinctive non-observational knowledge of their actions without being committed to her claims about the existence of a kind of knowledge with a reverse direction of fit from ordinary knowledge. 2 The idea originates in English speaking ph...

We consider the following combinatorial search problem: we are given some excellent elements of [n] and we should find at least one, asking questions of the following type: ”Is there an excellent element in A ⊂ [n]?”. G.O.H. Katona [6] proved sharp results for the number of questions needed to ask in the adaptive, non-adaptive and two-round versions of this problem. We verify a conjecture of Ka...