Results 61 to 70 of about 131,680 (187)

Construction of nested space-filling designs

, 2009
New types of designs called nested space-filling designs have been proposed for conducting multiple computer experiments with different levels of accuracy. In this article, we develop several approaches to constructing such designs.
Ai, Mingyao, Qian, Peter Z. G., Wu, C. F. Jeff   +2 more
core   +1 more source

Combinatorial aspects of covering arrays

Le Matematiche, 2004
Covering arrays generalize orthogonal arrays by requiring that t -tuples be covered, but not requiring that the appearance of t -tuples be balanced.Their uses in screening experiments has found application in software testing, hardware testing, and a ...
Charles J. Colbourn
doaj  

Optimizing Isolation in Interleaved Co-Frequency Orthogonally Polarized Circular Patch Array Antennas Using Conformal Mantle Cloaks and Integrated Decoupling Patches

IEEE Open Journal of Antennas and Propagation
Employing two closely spaced arrays operating at the same frequency with orthogonal polarizations and independent operations present significant potential for miniaturizing telecommunication systems.
Reza Masoumi, Robab Kazemi, Aly E. Fathy
doaj   +1 more source

Joint Estimation of DOA and Frequency of Multiple Sources with Orthogonal Coprime Arrays

Sensors, 2019
A two-stage method is proposed to jointly estimate the direction-of-arrival (DOA) and carrier frequency (CF) of multiple sources, by using two orthogonal coprime arrays (CPAs).
Kai-Chieh Hsu, Jean-Fu Kiang
doaj   +1 more source

Fast DBF for conformal arrays based on 2D Fourier decomposition

The Journal of Engineering, 2019
Digital array radars with conformal arrays are attractive for platforms with limited installation space such as aircraft and unmanned aerial vehicles.
Yuan Yao, Guangxin Wu
doaj   +1 more source

Voltage Error Decreasing of Power Systems by State Estimation Strategy in the Presence of DG Units Using the Improved Taguchi Method and Phasor Measurement Unit [PDF]

Iranian Journal of Electrical and Electronic Engineering
In recent decades, because of the rapid population growth of the world, considerable changes in climate, the reduction of fossil fuel sources to consume the traditional power plants and their high depreciation, and the increase in fuel prices.
Majid Najjarpour, Behrouz Tousi, Shahaboddin Yazdandoust Moghanlou   +2 more
doaj  

Joint 2-D DOA and Noncircularity Phase Estimation Method

Leida xuebao, 2012
Classical joint estimation methods need large calculation quantity and multidimensional search. In order to avoid these shortcoming, a novel joint two-Dimension (2-D) Direction Of Arrival (DOA) and noncircularity phase estimation method based on three ...
Wang Ling, Li Guo-lin, Xie Xin, Qi Shuai
doaj  

Orthogonal Arrays of Index Unity

The Annals of Mathematical Statistics, 1952
In this paper we shall proceed to generalize the notion of a set of orthogonal Latin squares, and we term this extension an orthogonal array of index unity. In Section 2 we secure bounds for the number of constraints which are the counterpart of the familiar theorem which states that the number of mutually orthogonal Latin squares of side $s$ is ...
openaire   +2 more sources

Globally simple Heffter arrays and orthogonal cyclic cycle decompositions

, 2018
In this paper we introduce a particular class of Heffter arrays, called globally simple Heffter arrays, whose existence gives at once orthogonal cyclic cycle decompositions of the complete graph and of the cocktail party graph.
Costa, Simone, Morini, Fiorenza, Pasotti, Anita, Pellegrini, Marco Antonio   +3 more
core  

Improvement of Surface Roughness Quality for Stainless Steel 420 Plate Using Magnetic Abrasive Finishing Method

Al-Khawarizmi Engineering Journal, 2010
An experimental study was carried out to improve the surface roughness quality of the stainless steel 420 using magnetic abrasive finishing method (MAF).
Yahya M. Hamad
doaj