In this paper. an attempt is made to develop off-line recognition strategies for the isolated. handwritten English characters (A to Z. a to z). The preprocessing of characters comprises bounding of characters for translation invariance and normalization of characters for size invariance. The variability in a character introduced by the rotation and deformation is the main concern of this paper....

This paper proposes a vectorial Z-normalization approach, the VZ-norm, which extends Z-normalisation to the multivariate case. It is applied in the framework of Anchor Model (AM) based speaker verification. It experimentally proves to significantly improve performance of anchor models on NIST and ESTER databases. A comparative study of different strategies for computing the covariance matrix in...

We show that for k ≥ 3, given any matrix in GL(k,Z), there is a hyperbolic fully irreducible automorphism of the free group of rank k whose induced action on Z is the given matrix.

An under-appreciated aspect of the genetic analysis of gene expression is the impact of post-probe level normalization on biological inference. Here we contrast nine different methods for normalization of an Illumina bead-array gene expression profiling dataset consisting of peripheral blood samples from 189 individual participants in the Center for Health Discovery and Well Being study in Atla...

Our premise in this paper is to investigate the available channel capacity of MIMO systems in correlated transmission channels for various antenna arrangements differing in their suitability in order to construct high rank LOS channels. Hence, a measurement campaign with a fast 5×5 MIMO channelsounder was carried out in a typical, medium scale, in room office scenario giving the opportunity to ...

An action of Zk is associated to a higher rank graph Λ satisfying a mild assumption. This generalises the construction of a topological Markov shift arising from a nonnegative integer matrix. We show that the stable Ruelle algebra of Λ is strongly Morita equivalent to C∗(Λ). Hence, if Λ satisfies the aperiodicity condition, the stable Ruelle algebra is simple, stable and purely infinite.

We describe a nonsingular hermitian form of rank 4 over the group ring Z[Z] which is not extended from the integers. Moreover, we show that under certain indefiniteness asumptions, every nonsingular hermitian form on a free Z[Z]module is extended from the integers. As a corollary, there exists a closed oriented 4-dimensional manifold with fundamental group Z which is not the connected sum of S ...

Let Z ⊂ P, r ≥ 4, be a closed subscheme with dim(Z) ≤ r−4. Fix integers c > 0 and gi ≥ 0, i = 1, . . . , c. We prove that the general union of Z and c smooth curves Yi ⊂ P with genus gi and deg(Yi) ≥ r + gr as maximal rank (i.e. the expected postulation) if deg(Y1) + · · ·+ deg(Yc) 0.

Observations of the cosmic evolution different gas phases across time indicate a marked increase in molecular mass density towards $z\sim 2-3$. Such transformation implies an accompanied change global distribution hydrogen column densities ($N_{\rm{H_2}}$). Using observations by PHANGS-ALMA/SDSS and simulations GRIFFIN/IllustrisTNG we explore this H$_2$ function [$f(N_{\rm{H}_2})$]. The (and HI...