This paper presents the design of a circular sector microstrip antenna and arrays that could be u... more This paper presents the design of a circular sector microstrip antenna and arrays that could be used in many bands: X or C band. Based on the designed patch antenna, many phased arrays will be simulated using HFSS. The impact of distance between element, number of element and phase will be checked. Obtained results are analyzed.
This document surveys the IP-based vehicular networks, which are considered a key component of In... more This document surveys the IP-based vehicular networks, which are considered a key component of Intelligent Transportation Systems (ITS). The main topics of vehicular networking are vehicle-tovehicle (V2V), vehicle-to-infrastructure (V2I), and infrastructureto-vehicle (I2V) networking. This document deals with some critical aspects in vehicular networking, such as IP address autoconfiguration, vehicular network architecture, routing, mobility management, and security. This document also surveys standard activities for vehicular networks. Finally, this document summarizes and analyzes the previous research activities that use IPv4 or IPv6 for vehicular networking.
The problem of identifying nonlinear systems is proposed in the presence of hard nonlinearity. Th... more The problem of identifying nonlinear systems is proposed in the presence of hard nonlinearity. The nonlinear systems considered in this paper is structured by Hammerstein systems. The identification is studied in presence of possibly infinite-order linear dynamics and static nonlinearity. Hammerstein models consist of a series connection including a nonlinear element and a linear subsystem. The Identification problem is addressed in the presence of hard nonlinearity. Key-Words: Nonlinear systems, Hammerstein model, Hard nonlinearity, identification problem, frequency approach.
In Morocco, public service announcement is a complex field in which various linguistic practices ... more In Morocco, public service announcement is a complex field in which various linguistic practices and semiotic representations collide. Hence, the aim of the present work is to demystify the misalignment between language and visuals in the public service announcement in a video on the protection of the environment, namely towards forests. This study adopts a discourse and a visual analysis to clarify the extent to which the interpretation of the announcement leas to misunderstanding and causes a lot of ambiguity. The study also shows that the trees and forests are linguistically reported as feminine constructs while the visuals portrayed them as masculine constructs. This article has a lot of implications for public institutions, advertising companies, and future researchers whose efforts are required to reconsider the pendulum between the linguistic and the visual in public announcements so as to effectively raise people’s awareness towards environmental issues.
International Journal of Aeronautical Science & Aerospace Research, 2016
Recently Sarsri et al., [10] used the Component Mode Synthesis method coupled with the perturbati... more Recently Sarsri et al., [10] used the Component Mode Synthesis method coupled with the perturbation method to calculate the stochastic modes of large FE models with uncertain parameters for the linear problems. In another work, Sarsri et al., [9] developed an approach coupling Component Mode Synthesis reduction method and developing uncertainty by a polynomial chaos
International Journal of Chemistry and Materials Research, 2015
The research inorganic solar cell has been developed especially in the last decade and has attrac... more The research inorganic solar cell has been developed especially in the last decade and has attracted scientific and economic interest triggered by a rapid increase in power conversion efficiencies. In this work, computational study on the geometries and electronic properties of structures composed of phthalocyanine and zinc phthalocyanine which are substituted by different group PcR and PcZn-R. We presented a theoretical study by using DFT method at B3LYP level with 6-31G (d) basis set. The theoretical knowledge of the HOMO and LUMO energy levels of the components is basic in studying organic solar cells, so, the HOMO, LUMO, Gap energy and the photovoltaic properties of the studied compounds have been calculated. These properties suggest these materials as a good candidate for organic solar cells.
Estimation of model parameters (3-D frequencies), based on the high resolution spectral analysis ... more Estimation of model parameters (3-D frequencies), based on the high resolution spectral analysis methods known by their performances and their precision such as 3-D ESPRIT, remains a problem which is essential in the modeling of the signals by a sum of 3-D complexes exponential (3-D SCE model) embedded in an additive gaussian noise. Indeed, good results are obtained when the noise is white and by using the Second Order Statistics (autocorrelations), but if it becomes colored, the results are degraded which forces us to remedy this problem, to think about the Higher Order Statistics (cumulants). To verify the efficiency of estimators of 3D frequency, we calculate the asymptotic Cramer-Rao Bound (CRB). Key-Words: Spectral Analysis, High Resolution, 3-D ESPRIT, Second Order Statistics, Higher Order Statistics, Fourth Order Cumulant, Cramer-Rao Bound.
Geometric and harmonic means of two convex functionals have been recently constructed. The aim of... more Geometric and harmonic means of two convex functionals have been recently constructed. The aim of this work is to study the stability of these operations. The development of this theory is very useful in many contexts. The obtained results generalize the case of symmetric positive operators which have been studied in the literature.
This paper presents the design of a circular sector microstrip antenna and arrays that could be u... more This paper presents the design of a circular sector microstrip antenna and arrays that could be used in many bands: X or C band. Based on the designed patch antenna, many phased arrays will be simulated using HFSS. The impact of distance between element, number of element and phase will be checked. Obtained results are analyzed.
This document surveys the IP-based vehicular networks, which are considered a key component of In... more This document surveys the IP-based vehicular networks, which are considered a key component of Intelligent Transportation Systems (ITS). The main topics of vehicular networking are vehicle-tovehicle (V2V), vehicle-to-infrastructure (V2I), and infrastructureto-vehicle (I2V) networking. This document deals with some critical aspects in vehicular networking, such as IP address autoconfiguration, vehicular network architecture, routing, mobility management, and security. This document also surveys standard activities for vehicular networks. Finally, this document summarizes and analyzes the previous research activities that use IPv4 or IPv6 for vehicular networking.
The problem of identifying nonlinear systems is proposed in the presence of hard nonlinearity. Th... more The problem of identifying nonlinear systems is proposed in the presence of hard nonlinearity. The nonlinear systems considered in this paper is structured by Hammerstein systems. The identification is studied in presence of possibly infinite-order linear dynamics and static nonlinearity. Hammerstein models consist of a series connection including a nonlinear element and a linear subsystem. The Identification problem is addressed in the presence of hard nonlinearity. Key-Words: Nonlinear systems, Hammerstein model, Hard nonlinearity, identification problem, frequency approach.
In Morocco, public service announcement is a complex field in which various linguistic practices ... more In Morocco, public service announcement is a complex field in which various linguistic practices and semiotic representations collide. Hence, the aim of the present work is to demystify the misalignment between language and visuals in the public service announcement in a video on the protection of the environment, namely towards forests. This study adopts a discourse and a visual analysis to clarify the extent to which the interpretation of the announcement leas to misunderstanding and causes a lot of ambiguity. The study also shows that the trees and forests are linguistically reported as feminine constructs while the visuals portrayed them as masculine constructs. This article has a lot of implications for public institutions, advertising companies, and future researchers whose efforts are required to reconsider the pendulum between the linguistic and the visual in public announcements so as to effectively raise people’s awareness towards environmental issues.
International Journal of Aeronautical Science & Aerospace Research, 2016
Recently Sarsri et al., [10] used the Component Mode Synthesis method coupled with the perturbati... more Recently Sarsri et al., [10] used the Component Mode Synthesis method coupled with the perturbation method to calculate the stochastic modes of large FE models with uncertain parameters for the linear problems. In another work, Sarsri et al., [9] developed an approach coupling Component Mode Synthesis reduction method and developing uncertainty by a polynomial chaos
International Journal of Chemistry and Materials Research, 2015
The research inorganic solar cell has been developed especially in the last decade and has attrac... more The research inorganic solar cell has been developed especially in the last decade and has attracted scientific and economic interest triggered by a rapid increase in power conversion efficiencies. In this work, computational study on the geometries and electronic properties of structures composed of phthalocyanine and zinc phthalocyanine which are substituted by different group PcR and PcZn-R. We presented a theoretical study by using DFT method at B3LYP level with 6-31G (d) basis set. The theoretical knowledge of the HOMO and LUMO energy levels of the components is basic in studying organic solar cells, so, the HOMO, LUMO, Gap energy and the photovoltaic properties of the studied compounds have been calculated. These properties suggest these materials as a good candidate for organic solar cells.
Estimation of model parameters (3-D frequencies), based on the high resolution spectral analysis ... more Estimation of model parameters (3-D frequencies), based on the high resolution spectral analysis methods known by their performances and their precision such as 3-D ESPRIT, remains a problem which is essential in the modeling of the signals by a sum of 3-D complexes exponential (3-D SCE model) embedded in an additive gaussian noise. Indeed, good results are obtained when the noise is white and by using the Second Order Statistics (autocorrelations), but if it becomes colored, the results are degraded which forces us to remedy this problem, to think about the Higher Order Statistics (cumulants). To verify the efficiency of estimators of 3D frequency, we calculate the asymptotic Cramer-Rao Bound (CRB). Key-Words: Spectral Analysis, High Resolution, 3-D ESPRIT, Second Order Statistics, Higher Order Statistics, Fourth Order Cumulant, Cramer-Rao Bound.
Geometric and harmonic means of two convex functionals have been recently constructed. The aim of... more Geometric and harmonic means of two convex functionals have been recently constructed. The aim of this work is to study the stability of these operations. The development of this theory is very useful in many contexts. The obtained results generalize the case of symmetric positive operators which have been studied in the literature.
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