Now showing items 1-20 of 151

• #### A canonical reduced form for singular time invariant linear systems ﻿

(2009-09)
Conference report
Open Access
We consider quadruples of matrices (E; A;B;C), representing singular linear time invariant systems in the form Ex_ (t) = Ax + Bu y = Cx ¾ (1) with E;A 2 Mp£n(C), B 2 Mp£m(C) and C 2 Mq£n(C) under proportional and ...
• #### A construction of small regular bipartite graphs of girth 8 ﻿

(2009-01)
Article
Open Access
Let q be a prime a power and k an integer such that 3 ≤ k ≤ q. In this paper we present a method using Latin squares to construct adjacency matrices of k-regular bipartite graphs of girth 8 on $2(kq^{2}-q)$ vertices. Some ...
• #### A design procedure for overlapped guaranteed cost controllers ﻿

(Elsevier, 2008)
Conference lecture
Open Access
In this paper a quadratic guaranteed cost control problem for a class of linear continuous-time state-delay systems with norm-bounded uncertainties is considered. We will suppose that the systems are composed by two ...
• #### A differential approach for bounding the index of graphs under perturbations ﻿

(2011-03)
Research report
Open Access
• #### A general approach for computing residues of partial-fraction expansion of transfer matrices ﻿

(2013-07)
Article
Open Access
This paper deals with the description of a general method for calculating the residues of a linear system. Considering, physical models, it is well-assumed that the system described only presents simple eigenvalues, or at ...
• #### A novel iterative linear matrix inequality design procedure for passive inter-substructure vibration control ﻿

(Multidisciplinary Digital Publishing Institute, 2020-08-24)
Article
Open Access
In vibration control of compound structures, inter-substructure damper (ISSD) systems exploit the out-of-phase response of different substructures to dissipate the kinetic vibrational energy by means of inter-substructure ...
• #### A solution to the tennis ball problem ﻿

(2005)
Article
Open Access
We present a complete solution to the so-called tennis ball problem, which is equivalent to counting the number of lattice paths in the plane that use North and East steps and lie between certain boundaries. The solution ...
• #### A Stein matrix equation related to transfer matrix of linear dynamic systems over commutative rings ﻿

(Editorial de la Universitat Politècnica de València (UPV), 2010)
Conference report
Open Access
Este trabajo está inmerso en el campo de la Teoría de Control sobre un anillo conmutativo R con elemento unidad. Dado un sistema dinámico lineal invariante en el tiempo representado por x+(t) = Ax(t) + Bu(t) sobre R, ...
• #### A study of QR decomposition and Kalman filter implementations ﻿

(Universitat Politècnica de Catalunya, 2014-09)
Master thesis (pre-Bologna period)
Open Access
Covenantee:   Kungliga Tekniska högskolan
[ANGLÈS] With the rapid development of new technologies during the last decades, the demand of complex algorithms to work in real-time applications has increased considerably. To achieve the real time expectations and to ...
• #### A variational solution of the time-dependent Schrodinger equation by a restricted superposition of frozen Gaussian wavepackets ﻿

(2005-05)
Article
Restricted access - publisher's policy
We present a variational solution of the time-dependent Schrodinger equation formed from a restricted superposition of frozen Gaussian wavepackets. The trial function is comprised of a set of frozen Gaussian wavepackets ...
• #### A Volume Visualization Algorithm using a coherent Extended Weight Matrix ﻿

(1995-01)
Article
Restricted access - publisher's policy
Direct cell-to-cell volume visualization algorithms, also called projective rendering methods, present the advantage of allowing semi-transparencies and, additionally, as they project all the samples, they avoid the ...
• #### Accelerated direct solution of the MoM linear system using block compression and nested factorization ﻿

(IEEE, 2011)
Conference report
Restricted access - publisher's policy
A comparison is presented between different algorithms for direct (non-iterative) accelerated solution of the Method of Moments. The alternatives are common block LU factorization and Compressed Block Decomposition (CBD), ...
• #### Adjacency matrices of polarity graphs and of other C4-free graphs of large size ﻿

(2010)
Article
Restricted access - publisher's policy
In this paper we give a method for obtaining the adjacency matrix of a simple polarity graph $G_q$ from a projective plane PG(2,q), where q is a prime power. Denote by ex(n;C₄) the maximum number of edges of a graph on n ...
• #### Ajuste temporal de matrices OD basado en una aproximación del gradiente ﻿

(Universitat Politècnica de Catalunya, 2013-02)
Master thesis
Open Access
Modelar la demanda del transporte en función de una matriz Origen-Destino (OD) es un aspecto clave en casi todos los modelos de transporte. Cuando realizamos una planificación estratégica del transporte hacemos uso de ...
• #### Alternative tests for functional and pointwise output-controllability of linear time-invariant systems ﻿

(2013)
Article
Open Access
This paper deals with the description of a new method for calculating the functional output-controllability. It is computed by means of the rank of a certain constant matrix which can be associated to the system. Moreover, ...
• #### An iterative linear matrix inequality controller-design strategy for H-infinity structural vibration control ﻿

(CRC Press/Balkema, 2019)
Conference report
Open Access
In this paper, we present a novel Iterative Linear Inequality (ILMI) strategy for controller design that makes it possible to compute suboptimal H-infinity static output-feedback (SOF) controllers with high-performance ...
• #### An LMI approach to H_ synchronization of second-order neutral master-slave systems ﻿

(American Automatic Control Council, 2009-06-10)
Conference report
Open Access
The H_ synchronization problem of the master and slave structure of a second-order neutral master-slave systems with time-varying delays is presented in this paper. Delaydependent sufficient conditions for the design of a ...
• #### Aplicaciones de la Teoría de Matrices en Matemática Discreta ﻿

(1999-07)
Working paper
Open Access
Se describen algunas aplicaciones de la teoría de matrices a diversos temas pertenecientes al ámbito de la matem\'atica discreta.
• #### Approaching dual quaternions from matrix algebra ﻿

(2014)
Article
Open Access
Dual quaternions give a neat and succinct way to encapsulate both translations and rotations into a unified representation that can easily be concatenated and interpolated. Unfortunately, the combination of quaternions and ...
• #### Brunovsky local form of a holomorphic family of pair of matrices ﻿

(Elsevier, 1997)
Article
Restricted access - publisher's policy
Following Arnold’s techniques, we obtain a local canonical form of a holomorphic family of pairs of matrices ( A( A), B(h)) ac t e d on by the state feedback group. We obtain an explicit formula to compute the dimension ...