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Synthetic Aperture Radar (SAR) satellite systems are very efficient in oil spill monitoring due to their capability to operate under all weather conditions. Systems such as the Envisat and RADARSAT have been used independently in many studies to detect oil spill. This paper presents an automatic feature based image registration and fusion algorithm for oil spill monitoring using SAR images. A range...
this paper proposes a fault tolerant control (FTC) for permanent magnet synchronous motors (PMSM) using field-oriented control (FOC) and direct torque control (DTC) strategy. In order to ensure continuity of operation and without losing PMSM performance in fault, the proposed FTC allows transition from FOC to DTC. The FOC of PMSM drive needed a mechanical sensor to measure rotor position but with...
Many studies have been conducted in different countries in order to develop assistance and monitoring systems to the person. These systems are designed to provide support in three main areas: health monitoring, security and comfort. Health systems are those that monitor the status of the person (e.g. weight, heart rate, activity) via physiological sensors, movement sensors, etc. Security systems provide...
With the growth of digital Arabic documents specially in information retrieval (IR) and natural language processing (NLP) applications, identification of irregular plurals which are commonly called broken plurals (BP) in modern standard Arabic becomes very urgent issue. Broken plurals are formed by imposing interdigitating patterns on stems, and singular words cannot be recovered by standard affix...
I-vector space feature has been recently proved to be very efficient in speaker recognition field. In this paper, we assess using the i-vector approach for emotional speaker recognition in order to boost the performance which is deteriorated by emotions. The key idea of the i-vector algorithm is to represent each speaker by a fixed length and low dimensional feature vector. The concatenation of these...
Owing to the rising need for power electronics for sustaining the high quality of electrical energy and the considerable cost of such a technology, we present in this paper a solution dealing with these problems. We propose to create a combination between SVC (Static VAR Compensator) and TCSC (Thyristor Controlled Series Compensator) to reach the performances of UPFC (Unified Power Flow Controller)...
This paper deals with the problem of diagnosis of linear system defects. The problem of fault detection under disturbances for multi-input and multi-output (MIMO) system. Fault detection can be investigated by generating residuals. These residuals can be generated using different methods. In this paper we will used one of the finest methods for generating residuals is luenberger observer (LO). Fault...
This paper presents a control scheme and transient model for a voltage source DC-to-DC converter acting as the DC link interface for photovoltaic array. The control scheme provides for Maximum Power Point Tracking (MPPT) technique on the Photovoltaic array while maintaining a constant DC link voltage that can be tied to an energy storage system and/or a voltage source converter DC-to-AC converter...
This paper presents a review of two Maximum Power Point Tracking (MPPT) methods used in order to extracting maximum possible power from the wind energy conversion systems based on doubly fed induction generator. These two methods are namely tip speed ratio (TSR) control and hill-climb search (HCS) control. The control of the doubly-fed induction generator is based on direct power control for wind...
Literature review is an essential phase in any research work. However, it is tricky and time consuming. A web application that provides most cited authors and publications related to a research field would be of a significant support to researchers when conducting their review work. The aim of this paper is to propose an approach that combines data accessible via the available academic search engine...
In this paper, new stability conditions for discrete time Lur'e systems are proposed. Stability tests are achieved using aggregation techniques concept based on the use of vector norms and arrow form systems representation. Explicit stability conditions formulation based on the system instantaneous characteristic polynomial and the state space matrix norm are synthesized. Furthermore, it is shown...
Internet of Things is an evolution from computer networks to a network of interconnected objects such as books, cars, sensors, etc… In recent years, interest in the applications of Wireless Body Area Networks (BANs), have grown significantly and this opens up an important number of challenges such as mobility management. Locator/Id Split Protocol (LISP) deals with the traditional IP problems like...
Through this article, we will focus on the most common problem in the internal model control for multivariable systems with multiple time delays, that is the reversal of the corrector. This problem seems to be quite annoying when we face a non-square system. Our ultimate work developed through this paper, will be concentrated on a specific work structures to overcome the mean difference between the...
In this paper, we present a synthesis of the fractional order Proportional Integral controller (PIλ) using Characteristic Ratio Assignment (CRA) method. This controller guaranties some step response performances such as setting time, rise time and overshoot. Simulation results show the efficiency of the proposed controller.
In the conventional Direct Torque Control (DTC) the stator flux and the electromagnetic torque have high ripples due to the switching frequency variations. To fix it, the Space Vector Modulation (SVM) is used in this paper. This paper aims firstly to develop a novel DTC-SVM structure based Sliding Mode (SM) controllers to overcome the DTC-SVM based PI controllers limitations, such as the sensitivity...
Electro-hydraulic actuators have been widely applied in industry with position or pressure control. Nevertheless, the conventional linear control technology is not able to satisfy the requirement of improving the control precision due to the nonlinearities of hydraulic systems. This paper presents two control strategies based on intelligent-PI in order to track a position of electro- hydraulic system...
In the construction of the semantic web, scientists use to annotate the existing web to improve the precision in handling documents for applications. The rapid growing of the web make impossible doing this manually. Many annotation techniques are used to resolve the first and easiest problem of information search which is finding documents containing the searched data. In this work we proposed a deep...
This paper considers a scheme of distributed coded cooperation for three different Protocols where the antennas are shared between source and relay so that an array for virtual transmission is created to facilitate transmission towards the destination. Since the relaying employed by relay uses amplify-and-forward (AF). The source is assumed to be equipped with two encoders, where the first one output...
In this paper two configurations of photovoltaic energy conversion using the NPC three levels inverter for stand-alone application are proposed and their performances compared. The first cascade uses separate PV sources and the second configuration use only one PV generator. Without a DC/DC converter used in these two studied cases, and in order to get a stable output voltage, authors propose a proportional...
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