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    Stochastic Reconfiguration and Optimal Coordination of V2G Plug-in Electric Vehicles Considering Correlated Wind Power Generation

    , Article IEEE Transactions on Sustainable Energy ; Volume 6, Issue 3 , 2015 , Pages 822-830 ; 19493029 (ISSN) Kavousi Fard, A ; Niknam, T ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2015
    Abstract
    This paper investigates the optimal operation of distribution feeder reconfiguration (DFR) strategy in the smart grids with high penetration of plug-in electric vehicles (PEVs) and correlated wind power generation. The increased utilization of PEVs in the system with stochastic volatile behavior along with the high penetration of renewable power sources such as wind turbines (WTs) can create new challenges in the system that will affect the DFR strategy greatly. In order to reach the most efficiency from the PEVs, the idea of vehicle-to-grid (V2G) is employed in this paper to make a bidirectional power flow (either charging/discharging or idle mode) strategy when providing the main charging... 

    A novel stochastic framework based on cloud theory and θ-modified bat algorithm to solve the distribution feeder reconfiguration

    , Article IEEE Transactions on Smart Grid ; Volume 7, Issue 2 , 2016 , Pages 740-750 ; 19493053 (ISSN) Kavousi Fard, A ; Niknam, T ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2016
    Abstract
    Distribution feeder reconfiguration (DFR) is a precious operation strategy that can improve the system from different aspects including total cost, reliability, and power quality. Nevertheless, the high complexity of the new smart grids has resulted in much uncertainty in the DFR problem that necessities the use of a sufficient stochastic framework to deal with them. In this way, this paper proposes a new stochastic framework based on cloud theory to account the uncertainties associated with multiobjective DFR problem from the reliability point of view. Cloud theory is constructed based on fuzzy theory and probability idea. In comparison with the Monte Carlo simulation method, cloud models... 

    A network model for vehicular Ad hoc networks: an introduction to obligatory attachment rule

    , Article IEEE Transactions on Network Science and Engineering ; Volume 3, Issue 2 , 2016 , Pages 82-94 ; 23274697 (ISSN) Ghafourian Ghahramani, S. A. A ; Hemmatyar, A. M. A ; Kavousi, K ; Sharif University of Technology
    2016
    Abstract
    In the past few years, the study of complex networks has attracted the attention of researchers. Many real networks, ranging from technological networks such as the Internet to biological networks, have been considered as special types of complex networks. Through application of the network science, important structural properties of such networks have been analyzed and the mechanisms that form such characteristics have been introduced. In this paper, we address the structural characteristics of a technological network called Vehicular Ad hoc Networks (VANETs). Recent studies reveal that the communication graph of VANETs has some interesting characteristics including: the Gaussian degree... 

    Determination of Landing Gear Loading in Landing Process Using Multi-body Dynamics Softwares

    , M.Sc. Thesis Sharif University of Technology Kavousi, Ahmad (Author) ; Haddadpour, Hassan (Supervisor)
    Abstract
    In this project, the landing process is simulated by using of multi-body dynamics commercial software. Various factors, including landing situations, aircraft structures and climate are used in this simulation. The purpose of this project is to determine the forces exerted on the aircraft landing gears in landing process in various landing conditions. For this purpose, the ADAMS multi-body dynamics software is used. At first, different scenarios based on FAR-25, including level landing, tail-down landing, crab landing are simulated. Results of dynamic simulation software with landing load factor obtained from the analytical solution are compared. Then for the level landing, different... 

    Optimization of Hybrid Anaerobic/Aerobic Bioreactor for Phosphate Removal

    , M.Sc. Thesis Sharif University of Technology Kavousi, Rezvan (Author) ; Borghei, Mehdi (Supervisor)
    Abstract
    Discharging treated or raw waste water in to surface water may cause lots of serious problems, including growth of algae, as a result of the presence of nutrients in waste water.algae decrease the concentration of dissolve oxygen in water.phosphorus removal from waste water is of absolute necessity. according to the standards set by the environmental organization, discharge the untreated waster water in to the surface water is not allowed. on the other hand, given manager facilities of deprived area,effort is channeled to reach the desired result through designing the simplest treatment systems. anaerobic-aerobic systems have remarkably been used for many years in the treatment of urban and... 

    Conceptual modeling of cardiovascular sounds

    , Article 2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005, Shanghai, 1 September 2005 through 4 September 2005 ; Volume 7 VOLS , 2005 , Pages 2308-2311 ; 05891019 (ISSN); 0780387406 (ISBN); 9780780387409 (ISBN) Pouladian, M ; Tehrani Fard, A. A ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2005
    Abstract
    In this paper, it is shown that the main source of mechanical energy of cardiovascular (CV) system i.e., rhythmic heart contraction is transformed to the oscillations of the CV walls and blood flow, and finally CV acoustical waves. These waves propagate through both blood flow (hemodynamical pathways) and tissues (viscoelastical pathways) toward the skin. Nonetheless, the CV walls could be assumed as the source of acoustical waves, since they act as the interface between blood flows and other tissues including skin. After obtaining the approximate accelerations of CV walls from pressure-flow (PF) models, we also needed to model the viscoelastical pathways until the skin. Some improvements on... 

    An algorithm for constructing all supercharacter theories of a finite group

    , Article Ars Mathematica Contemporanea ; Volume 18, Issue 1 , 2020 , Pages 149-162 Ashrafi, A. R ; Ghanbari Maman, L ; Kavousi, K ; Koorepazan Moftakhar, F ; Sharif University of Technology
    Society of Mathematicians, Physicists and Astronomers of Slovenia  2020
    Abstract
    In 2008, Diaconis and Isaacs introduced the notion of a supercharacter theory of a finite group in which supercharacters replace with irreducible characters and superclasses by conjugacy classes. In this paper, we introduce an algorithm for constructing supercharacter theories of a finite group by which all supercharacter theories of groups containing up to 14 conjugacy classes are calculated. © 2020 Society of Mathematicians, Physicists and Astronomers of Slovenia. All rights reserved  

    Automated Plant Species Identification Using Leaf Shape-Based Classification Techniques: A Case Study on Iranian Maples

    , Article Iranian Journal of Science and Technology - Transactions of Electrical Engineering ; Volume 45, Issue 3 , 2021 , Pages 1051-1061 ; 22286179 (ISSN) Mohtashamian, M ; Karimian, M ; Moola, F ; Kavousi, K ; Masoudi Nejad, A ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2021
    Abstract
    Foliar characteristics, especially the overall leaf shape, are useful features for the taxonomic identification of plants. Computer-aided plant species identification systems make it possible to investigate a large number of leaves in a short period of time. In this study, a fully automatic system was developed to accurately classify eight species of maples (Acer L.) in Iran using the leaf shape characteristics of harvested leaves. Maples show a broad range of leaf morphology, and the provided dataset is a diverse collection of simple leaves which can be a good representative of woody plant leaves with any overall shape and margin pattern. The applied method consisted of preprocessing,... 

    Ionic liquid based on α-amino acid anion and N7,N9-dimethylguaninium cation ([dMG][AA]): Theoretical study on the structure and electronic properties

    , Article Journal of Physical Chemistry A ; Volume 116, Issue 22 , April , 2012 , Pages 5436-5444 ; 10895639 (ISSN) Shakourian Fard, M ; Fattahi, A ; Bayat, A ; Sharif University of Technology
    2012
    Abstract
    The interactions between five amino acid based anions ([AA] - (AA = Gly, Phe, His, Try, and Tyr)) and N7,N9-dimethylguaninium cation ([dMG] +) have been investigated by the hybrid density functional theory method B3LYP together with the basis set 6-311++G(d,p). The calculated interaction energy was found to decrease in magnitude with increasing side-chain length in the amino acid anion. The interaction between the [dMG] + cation and [AA] - anion in the most stable configurations of ion pairs is a hydrogen bonding interaction. These hydrogen bonds (H bonds) were analyzed by the quantum theory of atoms in molecules (QTAIM) and natural bond orbital (NBO) analysis. Finally, several correlations... 

    Uniform cooling of a flat surface by an optimized array of turbulent impinging air jets

    , Article Heat Transfer Engineering ; Volume 40, Issue 20 , 2019 , Pages 1750-1761 ; 01457632 (ISSN) Sedighi, E ; Mazloom, A ; Hakkaki Fard, A ; Sharif University of Technology
    Taylor and Francis Ltd  2019
    Abstract
    The aim of this study is to investigate the uniform cooling of a hot isothermal heated target surface, using four turbulent impinging air jets. Eight parameters including the width of jets, the space between the inner jets, the space between inner and outer jets, the distance of jets from the plate, the impingement angle of jets, and the overall volumetric flow rate of the cooling air per unit depth of the nozzle are considered as design variables. The normalized standard deviation of the local Nusselt number from the desired Nusselt number is considered as the objective function. An optimization algorithm based on pattern search method is utilized to obtain the optimum array of the jets.... 

    A numerical study on utilizing horizontal flat-panel ground heat exchangers in ground-coupled heat pumps

    , Article Renewable Energy ; Volume 147 , March , 2020 , Pages 996-1010 Habibi, M ; Amadeh, A ; Hakkaki Fard, A ; Sharif University of Technology
    Elsevier Ltd  2020
    Abstract
    Horizontal ground heat exchangers (GHEs) have a lower cost in comparison to vertical ones; however, they require more land area. For the sake of reducing the required land area for horizontal GHEs, flat-panel GHEs have been recently introduced. In this piece of research, a 3-D numerical model has been developed to predict the thermal performance of flat-panel GHEs. In this study, at first, the thermal performance of a flat-panel GHE has been compared with that of linear horizontal ones. The results demonstrate that the flat-panel GHE has a better thermal performance of about 27% in comparison to an arrangement of linear GHEs with a value of 0.5 m for pipe spacing. In the second part of this... 

    Hydrogen production performance of a photovoltaic thermal system coupled with a proton exchange membrane electrolysis cell

    , Article International Journal of Hydrogen Energy ; 2021 ; 03603199 (ISSN) Salari, A ; Hakkaki Fard, A ; Jalalidil, A ; Sharif University of Technology
    Elsevier Ltd  2021
    Abstract
    As one of the cleanest energies, hydrogen has attracted much attention over the past decade. Hydrogen can be produced using water electrolysis in a Proton Exchange Membrane Electrolysis Cell (PEMEC). In the present study, the performance of the PEMEC, powered by the Photovoltaic-Thermal (PVT) system, is scrutinized. It is considered that the PVT system provides the required electrical power of the PEMEC and preheats the feedwater. A comprehensive numerical model of the coupled PVT-PEMEC system is developed. The model is used to investigate the effect of various operating parameters, including solar radiation intensity, inlet feedwater temperature, and feedwater mass flow rate, on the... 

    Hydrogen production performance of a photovoltaic thermal system coupled with a proton exchange membrane electrolysis cell

    , Article International Journal of Hydrogen Energy ; Volume 47, Issue 7 , 2022 , Pages 4472-4488 ; 03603199 (ISSN) Salari, A ; Hakkaki Fard, A ; Jalalidil, A ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    As one of the cleanest energies, hydrogen has attracted much attention over the past decade. Hydrogen can be produced using water electrolysis in a Proton Exchange Membrane Electrolysis Cell (PEMEC). In the present study, the performance of the PEMEC, powered by the Photovoltaic-Thermal (PVT) system, is scrutinized. It is considered that the PVT system provides the required electrical power of the PEMEC and preheats the feedwater. A comprehensive numerical model of the coupled PVT-PEMEC system is developed. The model is used to investigate the effect of various operating parameters, including solar radiation intensity, inlet feedwater temperature, and feedwater mass flow rate, on the... 

    An integrative Bayesian network approach to highlight key drivers in systemic lupus erythematosus

    , Article Arthritis Research and Therapy ; Volume 22, Issue 1 , June , 2020 Maleknia, S ; Salehi, Z ; Rezaei Tabar, V ; Sharifi Zarchi, A ; Kavousi, K ; Sharif University of Technology
    BioMed Central  2020
    Abstract
    Background: A comprehensive intuition of the systemic lupus erythematosus (SLE), as a complex and multifactorial disease, is a biological challenge. Dealing with this challenge needs employing sophisticated bioinformatics algorithms to discover the unknown aspects. This study aimed to underscore key molecular characteristics of SLE pathogenesis, which may serve as effective targets for therapeutic intervention. Methods: In the present study, the human peripheral blood mononuclear cell (PBMC) microarray datasets (n = 6), generated by three platforms, which included SLE patients (n = 220) and healthy control samples (n = 135) were collected. Across each platform, we integrated the datasets by... 

    Efficient scalable multi-party private set intersection using oblivious PRF

    , Article 17th International Workshop on Security and Trust Management, STM 2021, co-located with the 26th European Symposium on Research in Computer Security, ESORICS 2021, 8 October 2021 through 8 October 2021 ; Volume 13075 LNCS , 2021 , Pages 81-99 ; 03029743 (ISSN); 9783030918583 (ISBN) Kavousi, A ; Mohajeri, J ; Salmasizadeh, M ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2021
    Abstract
    In this paper, we present a concretely efficient protocol for private set intersection (PSI) in the multi-party setting using oblivious pseudorandom function (OPRF). In fact, we generalize the approach used in the work of Chase and Miao [CRYPTO 2020] towards deploying a lightweight multi-point OPRF construction for two-party PSI. Our protocol only includes oblivious transfer (OT) extension and garbled Bloom filter as its main ingredients and avoids computationally expensive operations. From a communication pattern perspective, the protocol consists of two types of interactions. The first type is performed over a star-like communication graph in which one designated party interacts with all... 

    Theoretical investigation on the structural and electronic properties of complexes formed by thymine and 2'-deoxythymidine with different anions

    , Article Structural Chemistry ; Volume 23, Issue 1 , July , 2012 , Pages 17-28 ; 10400400 (ISSN) Shakourian Fard, M ; Fattahi, A ; Sharif University of Technology
    2012
    Abstract
    Hydrogen bonding interactions between thymine nucleobase and 2'-deoxythymidine nucleoside (dT) with some biological anions such as F - (fluoride), Cl - (chloride), OH - (hydroxide), and NO 3 - (nitrate) have been explored theoretically. In this study, complexes have been studied by density functional theory (B3LYP method and 6-311++G (d,p) basis set). The relevant geometries, energies, and characteristics of hydrogen bonds (H-bonds) have been systematically investigated. There is a correlation between interaction energy and proton affinity for complexes of thymine nucleobase. The nature of all the interactions has been analyzed by means of the natural bonding orbital (NBO) and quantum theory... 

    Influence of cation-heteroatom (Li+, Na+, and K +) interaction on the structural and thermochemical properties of 2′-deoxythymidine nucleoside: Qtaim and NBO analyzes

    , Article Journal of Theoretical and Computational Chemistry ; Volume 12, Issue 2 , December , 2013 ; 02196336 (ISSN) Shakourian Fard, M ; Fattahi, A ; Sharif University of Technology
    2013
    Abstract
    Density functional theory (DFT) method and B3LYP/6-311++G(d,p) basis set were used to determine coordination geometries, binding strength, and metal ion affinity (MIA) for interaction of 2′-deoxythymidine (dT) with alkali metal cations including Li+, Na+, and K+. Calculations demonstrated that the interaction of dT with these cations is tri-coordinated η (O2, O4′, O5′). Among these cations, Li + cation exhibited the most tendency for interaction with dT. Cations via their interaction with dT can affect the N-glycosidic bond length, the values of pseudorotation of the sugar ring, the orientation of base unit with respect to sugar ring and the acidity of O5′H, O3′H, and N3H groups in 2′-dT... 

    Effect of electrical parameters on morphology, chemical composition, and photoactivity of the nano-porous titania layers synthesized by pulse-microarc oxidation

    , Article Electrochimica Acta ; Volume 55, Issue 8 , 2010 , Pages 2760-2766 ; 00134686 (ISSN) Bayati, M. R ; Moshfegh, A. Z ; Golestani Fard, F
    2010
    Abstract
    TiO2 layers were grown via pulse type microarc oxidation process under different applied voltages, frequencies, and duty cycles. Surface chemical composition and phase structure of the synthesized layers were studied utilizing X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). Furthermore, scanning electron microscope (SEM) and atomic force microscope (AFM) were employed to investigate surface morphology and topography of the layers. It was revealed that the layers had a porous structure with both anatase and rutile phases. The anatase relative content in the layers increased with the applied frequency; meanwhile, it decreased with duty cycle at low applied voltages, but... 

    A numerical study of dust deposition effects on photovoltaic modules and photovoltaic-thermal systems

    , Article Renewable Energy ; Volume 135 , 2019 , Pages 437-449 ; 09601481 (ISSN) Salari, A ; Hakkaki Fard, A ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Dust deposition on the surface of solar systems is one of the main parameters that significantly affects the performance of such systems. In this study, the effect of dust deposition density on the performance of photovoltaic modules (PV) and photovoltaic-thermal systems (PVT) is numerically investigated. Accordingly, all layers of a monocrystalline silicon PV module for both systems are simulated. Moreover, the effect of various system parameters on the performance of both clean and dusty PV module and PVT system are studied. The studied parameters included: solar radiation intensity, ambient temperature, coolant inlet temperature, and coolant inlet velocity. The obtained results indicate... 

    Long-term energy and exergy analysis of heat pumps with different types of ground and air heat exchangers

    , Article International Journal of Refrigeration ; Volume 100 , 2019 , Pages 414-433 ; 01407007 (ISSN) Habibi, M ; Hakkaki Fard, A ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Heat pumps as the only end-use cooling/heating technology with a Coefficient of Performance (COP) greater than one, have attracted a great deal of attention over the past decade. In this study, the long-term energy and exergy analysis of four different types of heat pump systems: a common Air Source Heat Pump (ASHP), an ASHP with Ground Air Heat Exchanger (GAHE), a Ground Source Heat Pump (GSHP) with Horizontal Ground Water Heat Exchanger (HGWHE), and a GSHP with Vertical Ground Water Heat Exchanger (VGWHE) is performed. It is considered that all systems are used for space cooling and heating of a residential building. A mathematical model that takes into account the variations of building...