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The Riesz spectral (RS) systems represent a large class of parabolic and hyperbolic partial differential equations (PDE) in infinite-dimensional systems. In this work, a fault detection and isolation (FDI) methodology for real diagonalizable RS systems is investigated by using a geometric approach. This paper is mainly concerned with the equivalency of different types of invariant subspaces defined...
An efficient methodology for the tuning of proportional-integral controllers' gains for the generator-side converter of a wind turbine driven permanent magnet synchronous generator using a self-adaptive global best harmony search algorithm is proposed. Performance of the generator with the optimized controller parameters obtained using the proposed algorithm is compared with the parameters obtained...
Milenage algorithm applies the block cipher Rijnadael (AES) with 128 bit key and 128 bit block size. This algorithm is used in the 3GPP authentication and key generation functions (f1, f1∗, f2, f3, f4, f5 and f5∗) for mobile communication systems (GSM/UMTS/LTE). In this paper a modification of Milenage algorithm is proposed through a dynamic change of S-box in AES depending on secret key. To get a...
Validation of hybrid systems is complex due to interactions of both continuous and discrete dynamics. Simulation is the most widely used form of system validation using a combination of random and constrained-random tests. Directed tests are promising since orders-of-magnitude less number of directed tests can achieve the same coverage goal compared to random tests. While directed test generation...
This paper proposes an efficient chaotic differential harmony search (CDHS) algorithm to solve the dynamic economic and emission dispatch (DEED) problem with security constraints. The main objective of DEED problem is to determine the optimal power generation schedule for the online generating units over a time horizon at the same time satisfying the environmental and security constraints along with...
Many real-life optimization problems are dynamic in time, demanding optimization algorithms to perform search for the best solutions in a time-varying problem space. Among population-based Evolutionary Algorithms (EAs), Differential Evolution (DE) is a simple but highly effective method that has been successfully applied to a wide variety of problems. We propose a technique to solve dynamic optimization...
In the emerging power systems setting, the realization of the demand flexibility potential needs to be coupled with its integration in electricity markets. Decentralization of market mechanisms constitutes a major challenge towards the achievement of such integration. In this paper, a decentralized day-ahead pool market mechanism is proposed, based on Lagrangian Relaxation (LR) principles. Issues...
In recent years, there has been a growing interest in real world application of heuristic methods. Memetic Algorithm (MA) is one of such effective heuristics. In this paper, we represent an efficient MA for determining optimal proportional-integral-derivative (PID) controller parameters of an AVR system. This MA is developed by combining a competitive variant of Deferential Evolution (DE) and a Local...
This paper solves the problem of minimizing triple bit error miscorrection for single-error-correcting, double-error-detecting codes (SEC-DED codes) which are used to protect all kinds of memory against errors. A lower bound for triple bit error miscorrection for the widely used class of odd-weight column codes is derived and actual codes which are very close to that theoretical bound are presented...
A new simple algorithm for the decomposition of the state space of a dynamical system into the minimal number of cyclic subspaces is proposed. This algorithm allows to perform the transformation to the Jordan form using the same fast techniques already known for systems with a cyclic dynamical matrix. The proposed algorithm does not introduce any assumption on the considered system and gives also,...
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