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Ciudad López Mateos, Mexico

Robles Gonzalez C.M.A.,ESIME IPN | Bucio Ramirez A.G.,UPIITA IPN | Ramirez Tachiquin M.P.,La Salle University at Cuauhtemoc | Sanchez Nava V.D.,La Salle University at Cuauhtemoc
Lecture Notes in Electrical Engineering | Year: 2014

We study the Electrical Impedance Equation within a special class of domains, whose boundaries posses non-smooth points. The forward Dirichlet boundary value problem is solved bias a novel numerical method, based upon the Pseudoanalytic Function Theory, that does not require additional regularization techniques to fulfill the boundary condition at the non-smooth points. © 2014 Springer Science+Business Media Dordrecht.

Moya S.,Mexican Institute of Petroleum | Escobar J.,ESIME IPN
IMA Journal of Mathematical Control and Information | Year: 2015

A typical problem in big cities is traffic congestion. An interesting problem is to study the traffic control at an intersection, which is an important aspect of the urban traffic control system. Commonly, the decision policy depends on the forecasting results on the incoming and outgoing flows at a signalized intersection. There are approaches to study this kind of problem when the roles of the roads are symmetrical at an intersection. However, there are different types of traffic problems where one road has priority on an intersection. In this paper, we present the problem of modelling signalized roads on an intersection as a finite controlled Markov chain game. Here, we try to minimize the queue in each road, at the intersection, taking into account that there is a road, known as a dominating road that can enforce his strategy, on the rest of the symmetric roads. Then, a dominant-symmetric equilibrium problem, a so-called Stackelberg-Nash equilibrium problem, is suggested with the use of a regularized equivalent version of the 'Extraproximal Method' to find a solution. Experimental results illustrate the feasibility of the proposed method. © The authors 2013. Published by Oxford University Press on behalf of the Institute of Mathematics and its Applications. All rights reserved.

Aguilar-Ibanez C.,CIC IPN | Mendoza-Mendoza J.A.,CIC IPN | Suarez-Castanon M.S.,ESCOM IPN | Davila J.,ESIME IPN
International Journal of Control | Year: 2014

This paper presents a smooth control strategy for the regulation problem of an uncertain system, which assures uniform ultimate boundedness of the closed-loop system inside of the zero-state neighbourhood. This neighbourhood can be made arbitrarily small. To this end, a class of nonlinear proportional integral controllers or PI controllers was designed. The behaviour of this controller emulates very close a sliding mode controller. To accomplish this behaviour saturation functions were combined with traditional PI controller. The controller did not need a high-gain controller or a sliding mode controller to accomplish robustness against unmodelled persistent perturbations. The obtained closed-solution has a finite time of convergence in a small vicinity. The corresponding stability convergence analysis was done applying the traditional Lyapunov method. Numerical simulations were carried out to assess the effectiveness of the obtained controller. © 2014 © 2014 Taylor & Francis.

Robledo-Martinez A.,Metropolitan Autonomous University | Hernandez-Avila J.L.,Metropolitan Autonomous University | Espino F.,ESIME IPN
PPPS 2001 - Pulsed Power Plasma Science 2001 | Year: 2015

A vacuum spark develops in the metallic vapor emitted by the electrodes. The plasma thus created experiences contractions that originate plasma points or micropinches. We report here an investigation into the dynamics of these both in the vacuum spark and the exploding wire. A fast, 2 kJ generator was used for the experiments. The diagnostics employed include optical frame and streak photography, time-resolved filtered X-ray detection and pinhole X-ray photography. The results obtained indicate that there is a substantial amount of pinching, some of it producing X-radiation. The energy of the X-rays tend to be rather soft and no characteristic lines were detected, even when swapping electrodes, which are made of dissimilar material. This demonstrates that radiative collapse is not attained at this type of energy and that for this type of experiments it is irrelevant what metallic vapors initiate the vacuum arc. © 2002 IEEE.

Vazquez-Fernandez E.,ESIME IPN | Coello C.A.C.,CINVESTAV
2013 IEEE Congress on Evolutionary Computation, CEC 2013 | Year: 2013

This paper employs an evolutionary algorithm to adjust the weights of the evaluation function of a chess engine. The selection mechanism of this algorithm chooses the virtual players (individuals in the population) that have the highest number of problems properly solved from a database of tactical and positional chess problems. This method has as its main advantage that we only mutate those weights involved in the solution of the current problem. Furthermore, the mutation mechanism is based on a Gaussian distribution whose standard deviation is adapted through the number of problems solved by each virtual player. We show here how, with the use of this method, we were able to increase the rating of our chess engine in 557 Elo points (from 1760 to 2317). © 2013 IEEE.

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