http://www.rotor-studio.net/blog/openrotor-lali-barriere-geometria-para-el-modelado-3d/

Title: Output tracking in nonminimum phase systems via sliding modes

Speaker: Prof. Yuri B. Shtessel, Dept. of Electrical and Computer Engineering, The University of Alabama in Huntsville, Huntsville, USA

Schedule: June 2nd, 2016, 15:00, IOC Seminar (ETSEIB building – 11th floor)

Abstract: The problem of causal output tracking and observation in non-minimum phase nonlinear systems is studied and addressed using sliding mode control techniques. The extended method of Stable System Center (ESSC) that is used for addressing the output tracking in nonminimum phase causal systems is presented. ESSC is used in two-fold manner: i) to generate bounded reference profile for unstable internal states; ii) to estimate states of unstable internal dynamics. Two applications of the proposed technique are considered for illustration purposes: output voltage tracking in a nonminimum phase DC/DC electric power converter and output tracking in SISO systems with time-delayed output feedback. A variety of traditional and higher-order sliding mode (HOSM) control and observation methods is employed in the majority of algorithms. Most of the theoretical results are covered by numerical simulations.

Speaker: Víctor Diego, Departament de Matemàtiques, UPC

Title: Distance mean-regular graphs

Abstract:

We introduce the concept of distance mean-regular graph, which can be seen as a generalization of both vertex-transitive and distance-regular graphs. Let G be a graph with vertex set V, diameter D, adjacency matrix A, and adjacency algebra A. Then, G is distance mean-regular when, for a given u in V, the averages of the intersection numbers p_{ij}^h(u,v)=|G_i(u)\G_j(v)| (number of vertices at distance i from u and distance j from v) computed over all vertices v at a given distance h in {0,1,ldots,D} from u, do not depend on u. In this work we study some properties and characterizations of these graphs. For instance, it is shown that a distance mean-regular graph is always distance degree-regular, and we give a condition for the converse to be also true. Some algebraic and spectral properties of distance mean-regular graphs are also investigated. We show that, for distance mean regular-graphs, the role of the distance matrices of distance-regular graphs is played for the so-called distance mean-regular matrices. These matrices are computed from a sequence of orthogonal polynomials evaluated at the adjacency matrix of G and, hence, they generate a subalgebra of A. Some other algebras associated to distance mean-regular graphs are also characterized.

We want to remind you the upcoming Advanced Course on Methods of Constructive Approximation and Harmonic Analysis which will be held at the Centre de Recerca Matemàtica, Bellaterra,

from May 30 to June 3, 2016.
This event is part of the IRP Constructive Approximation and Harmonic Analysis. 

 Senior registration fee: 90 €
 Junior registration fee: 60 €
 Deadline for registration fee: May 7, 2016

 We want to emphasize that March 15 is the deadline for grant application with the Clay Mathematics Institute http://www.crm.cat/en/Activities/Curs_2015-2016/Pages/CMI-Grants-Constructive-approximation.aspx . These advanced courses are devoted to different topics in connection with High-dimensional approximation, Harmonic Analysis, and closed areas, such as PDE’s. The courses will focus on the problems which have attracted a lot of attention in the recent years. You can find more information in:
 http://www.crm.cat/en/Activities/Curs_2015-2016/Pages/Constructive-Approximation.aspx  
 We hope that this information is of your interest and we hope to see you soon in Barcelona,  
 Vladimir Temlyakov, University of South Carolina
 Sergey Tikhonov, Centre de Recerca Matemàtica-ICREA
 (Scientific Comittee)

https://hangar.org/en/news/presentacio-final-del-projecte-de-recerca-divan-paz-multiparameter-space-representation-as-a-perceptual-exploration-interface/

Speaker: Jack Koolen, University of Science and Technology of China

Title: Recent progress on 2-walk-regular graphs

Abstract:

In this talk I will present some recent progress on 2-walk-regular graphs.

This is based on joint work with Zhi Qiao, Jongyook Park and Shao-Fei Du.

The Geometric Graphs week (formerly Pseudo Triangulations week) brings together a group of about 20 researchers to work in cooperation on open problems brought by the organizers and the participants.
This year it is organized by the DCCG UPC Research Group.
http://www-ma2.upc.edu/dccg/courses-seminars-conferences-and-workshops/geometric-graphs-week/

Seminari de Geometria Algebraica UPC-UB, Link
Ana Cristina López Martín (Universidad de Salamanca)
Equivalencias derivadas y fibras de Kodaira, Link

Més informació a Link

Activities are regularly announced at Link