For a set G and a family of sets F let DF (G) = {F ∈ F : F ∩ G = ∅} and SF (G) = {F ∈ F : F ⊆ G or G ⊆ F}. We say that a family is l-almost intersecting, (≤ l)-almost intersecting, l-almost Sperner, (≤ l)-almost Sperner if |DF (F )| = l, |DF (F )| ≤ l, |SF (F )| = l, |SF (F )| ≤ l (respectively) for all F ∈ F . We consider the problem of finding the largest possible family for each of the above...

This correspondence focuses on the asymptotic performance analysis of general direction-of-arrival (DOA) finding algorithms under the stochastic model assumption in which source and noise signals are possibly non-Gaussian and possibly temporally correlated. We prove, in particular, that all the covariance-based DOA estimators are sensitive to the temporal correlation of the sources when the noi...

KARINA I. MAZZITELLO, CONSTANCIO M. ARIZMENDI∗, ALVARO L. SALAS BRITO† and HILARY G. E. HENTSCHEL‡ CONICET-Facultad de Ingenieŕıa, Universidad Nacional de Mar del Plata, Juan B. Justo 4302, B7608FDQ Mar del Plata, Argentina ∗Facultad de Ingenieŕıa, Universidad Nacional de Mar del Plata, Juan B. Justo 4302, B7608FDQ Mar del Plata, Argentina †Univ Autonoma Metropolitana Azcapotzalco, Lab Sistemas...

The problem of signal direction-of-arrival (DOA) estimation in partly calibrated arrays composed of multiple subarrays with unknown intersubarray parameters and imperfectly known subarray orientations is studied. The recently developed spectral and root versions of the rank reduction estimator (RARE) are applicable to scenarios where no intersubarray calibration is available, but unfortunately,...

This paper revisits a model for elliptic curves over Q introduced by Huff in 1948 to study a diophantine problem. Huff’s model readily extends over fields of odd characteristic. Every elliptic curve over such a field and containing a copy of Z/4Z× Z/2Z is birationally equivalent to a Huff curve over the original field. This paper extends and generalizes Huff’s model. It presents fast explicit f...

The real driving emission (RDE) testing for certification of vehicles is performed in conditions that are well defined legislation. For emissions inventories and research, the influences some extended on an interesting issue. In present work, examples RDE results from two common passenger cars with gasoline diesel propulsion given. varying were “winter/summer”, “mild/aggressive”, “higher altitu...

Abstract The water saving lock layout plays a key role in addressing the navigation hydraulic problems with high dams. However, study of propagation and development nonlinear long waves induced by ship-lock operation basin has received less attention so far. Specially, mechanisms governing formation secondary impact these on impoundments are still not fully understood. In present entire evoluti...

Article history: Available online 31 March 2010

The paper deals with the problem of mobile location in the presence of angular scattering. The proposed approach consists in using the knowledge of the Power Angle Density (PAD) to estimate the azimuth, the sight of the mobile and their respective angular spread.