Results 11 to 20 of about 650 (234)
Silver nanoparticles decorated ZnO-CuO core-shell nanowire arrays with low water adhesion and high antibacterial activity. [PDF]
Sci Rep, 2023 Nanostructured surfaces based on silver nanoparticles decorated ZnO–CuO core–shell nanowire arrays, which can assure protection against various environmental factors such as water and bacteria were developed by combining dry preparation techniques namely
Costas A +6 more
europepmc +2 more sources
Combinatorial designs with Costas arrays properties
Discrete Mathematics, 1991 Several constructions for 0–1 three-dimensional arrays, in which some of the two-dimensional subarrays have ‘good’ two-dimensional autocorrelation function values, i.e., the vectors connecting two 1's in the matrix are all distinct as vectors, are given.
Etzion, Tuvi
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A Recursive Method for Enumeration of Costas Arrays
CoRR, 2014 In this paper, we propose a recursive method for finding Costas arrays that relies on a particular formation of Costas arrays from similar patterns of smaller size.
Stoica, Petre, Soltanalian, Mojtaba
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Algebraic constructions for costas arrays
Journal of Combinatorial Theory, Series A, 1984 The following is equivalent to a problem posed by \textit{J. P. Costas} [Medium constraints on sonar design and performance. EASCON Convention Record, 68A-68L (1975)], who encountered it in the context of attempting to construct sonar signal patterns. Problem.
Golomb, Solomon W
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A new search method for costas arrays by using difference triangle analysis
, 2017 Costas arrays are used for constructing frequency sets for the frequency shift keying waveforms in low probability of intercept radars. Costas arrays are constructed mostly using the methods based on the finite field theory or they are found by ...
Erkan Afacan
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Stochastic Search for Costas Arrays
2006 40th Annual Conference on Information Sciences and Systems, 2006 We present methods for searching for Costas arrays of arbitrary size starting from a random permutation matrix. The permutation is made ? more Costas? by swapping a small number of elements in the permutation so that number of repeated values within each line of the difference triangle is reduced.
John Healy, Scott Rickard
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ON THE DISJOINTNESS OF ALGEBRAICALLY CONSTRUCTED COSTAS ARRAYS
Journal of Algebra and Its Applications, 2011 Is it possible for a particular Costas array to be generated by two different constructions of the Golomb and Welch families? Experimental data suggests that this does not happen (except for trivially small orders), and a (partial) proof of this fact is
SCOTT RICKARD +2 more
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Distance vectors in Costas arrays
2008 42nd Annual Conference on Information Sciences and Systems, 2008 We investigate the distance vectors contained in individual and in pairs of Costas arrays, and prove some rigorous results in the case of the algebraically constructed ones. Overall, it appears that the set with the property that every Costas array has a distance vector therein, or that every pair of Costas arrays with a common vector have a common ...
Konstantinos Drakakis +2 more
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Interlaced Costas Arrays Do Not Exist [PDF]
Mathematical Problems in Engineering, 2008 We prove that the only Costas arrays that can be constructed by interlacing 2 Costas arrays of smaller orders (either equal or differing by 1) are those of order 2, and that, consequently, no non‐trivial Costas arrays result from this method.
Konstantinos Drakakis +2 more
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Universal Costas Matrices: Towards a General Framework for Costas Array Construction [PDF]
CoRRCostas arrays are a special type of permutation matrices with ideal autocorrelation and low cross-correlation properties, making them valuable for radar, wireless communication, and integrated sensing and communication applications. This paper presents a
Gulec, Fatih, Abolghasemi, Vahid
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