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In this work, an investigation and evaluation of harvested energy by solar air collector equipped with offset strip fin absorber plate is carried out under different climate conditions of Algeria. The so called isopleths maps of harvested solar energy by solar air collector of typical main city each representing a given climate region (Alger, Tlemcen, Chlef, Batna, Ghardaïa, Adrar and Tamanrasset)...
Blind objective metrics to automatically quantify perceived image quality degradation introduced by blur, is highly beneficial for current digital imaging systems. We present, in this paper, a perceptual no reference blur assessment metric developed in the frequency domain. As blurring affects specially edges and fine image details, that represent high frequency components of an image, the main idea...
In this paper we have applied two types of control on two coupled water tanks, where the dynamic model is nonlinear system. The first control is the sliding mode with linear surface, the advantages of this type of control is the discontinuity behavior which can be applied to variable structure systems (VSS) and its good robustness against the injected disturbances, and/or the noise, and finally unaffected...
This article discusses the modeling and control wind energy conversion system WECS, equipped by a double fed asynchronous generator, which use the topology that stator is connected direct to the grid while the rotor is connected to grid through a back-to-back converter. The control strategy is applied to control active and reactive powers of the rotor side converter RSC with linear PI controller....
A general and efficient algorithmic implementation is presented for calculating of self and/or mutual inductances using winding function theory for any type of stator and/or rotor layout slot windings. Then, this algorithm is applied on brushless doubly fed induction machines with standard cage. In fact, several kinds of slot windings are treated to prove the efficiency of this technique. The procedure...
Complex and large scale dimensional systems are usually included in many important industrial problems where it is generally necessary to avoid the use of centralized controllers in the high dimensionality through the use of decentralized controllers. In this paper a new model approach is proposed for the design of an effective overlapping optimal decentralized controller for large scale dynamic system...
In this paper, a control strategy based on fuzzy emulation of LQG controller is proposed. The design procedure aims to contruct fuzzy logic based controllers by emulating higher-order control laws using fuzzy reasoning and clustering techniques. The study is conducted on a nonlinear drum boilerturbine model for which a multivariable LQG fuzzy emulator is designed. Simulations under different operating...
In this work we propose an online 3D trajectory generation based Artificial Potential Field method (APF) for fixed-wing UAVs. The proposed approach uses a simplified dynamic model in order to ensure the feasibility of the generated trajectory by the real UAV. Simulations show the feasibility of the approach in the cases of waypoints navigation in both free environment and obstructed environment.
The present work aims to contributing to the perspective of using lead acid batteries for the storage of energy produced by photovoltaic plants. After a review of different models tackling the performance of lead acid batteries, we opted for the electrochemical approach and based our study on the evolution of the electrolyte specific gravity during charge/discharge cycling tests of a 12 V lead acid...
This paper investigates a new and simple control design for underatuated mechanical system with control diagram flow in tree structure. In such systems, the control input is related to more than one degree of freedom simultaneously. The idea is to include in the control law expression terms that act on theses variables at the same time. The procedure is applied to the stabilization of the popular...
This paper aims mainly to improve the data analysis methods already used to detect introduers in [1]. To do that, we introduce two anomaly intrusion detection methods based on Kernel Fisher Discriminant Analysis (KFDA) and Kernel Principal Component Analysis (KPCA). This approach searches for those vectors in the underlying space that best discriminate among users' profile classes. The discrimination...
The hybrid photovoltaic thermal (PV/T) collectors are devices that simultaneously convert solar energy into electricity and heat. In this paper, an attempt is made to investigate the thermal and electrical performance of a solar photovoltaic thermal (PV/T) air collector. We have examined the effect of adding a cover glass and a metal plate on improving heat transfer and energy performance of a photovoltaic/thermal...
The One Class Auto Associative Neural Network (AANN) has been investigated for solving various problems. Nonetheless, it is sensitive to the presence of outliers in the training set, which is known problem for one-class classifiers. For this, attempts have been done via proposing the use of efficient kernel and ensemble method to reduce the effect of outliers for one class support vector machine classifier...
Todays biometric systems are vulnerable to spoof attacks made by non-real faces. The problem is when a person shows in front of camera a print photo or a picture from cell phone. We study in this paper an anti-spoofing solution for distinguishing between 'live' and 'fake' faces. In our approach we used overlapping block LBP operator to extract features in each region of the image. To reduce the features...
Recently, numerical simulations have been used to study important physical phenomena in microfluidics application. A topic of great interest in this field is that of microdrops manipulation, which is applied to lab-on-a-chip devices for biomedical testing and synthesis. Computational fluid dynamics (CFD) analysis of microdrops flow was performed to simulate the design channel of Yung-Chieh et al....
In this paper, a nonlinear flatness and sliding mode controllers of a Fuel Cell and Supercapacitor (FC/SCs) DC-link voltage are proposed and validated by the simulation results. The nonlinear flatness strategy provides a simple way to achieve a linearizing feedback control law, which allows giving an exponential tracking of the desired energy references of FC and SCs. The ideas behind the proposed...
The bearings are the most important mechanical elements of rotating machinery. They are employed to support and rotate the shafts in rotating machinery. An unexpected defect of the bearing may cause significant economic losses. For that reason, the condition monitoring of these bearings has become a fundamental axis of development and industrial research. The focus of this paper is to combine tow...
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