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    Simulation and Implementation of Active Energy Management Algorithm on Residential Photovoltaic System with Storage

    , M.Sc. Thesis Sharif University of Technology Ghafouri Varzaneh, Saeed (Author) ; Abbaspour, Ali (Supervisor)
    Abstract
    In majority of the (standalone or grid-connected) PV Systems, predefined rule-based algorithms are utilized in order to manage and control the flow of power. The function of these algorithms is to send the generated energy from solar panels either to load for consumption, or to battery for storage, or to the grid for sale. Their performance is based on predefined instructions and regardless of load change and consumption patterns. Therefore the total efficiency of these systems depend greately upon individual user’s load type and consumption pattern. In current research, an optimum and dynamic energy management algorithm is proposed using dynamic programming (DP) method, in order to increase... 

    A comprehensive architecture platform for smarter universities

    , Article 2023 28th International Computer Conference, Computer Society of Iran, CSICC 2023 ; 2023 ; 979-835033819-5 (ISBN) Saberi Varzaneh, A ; Merikhi, B ; Saberi Varzaneh, M ; Alam Varzaneh Isfahani, M. H ; Habibi Kalahroodi, H ; Fatemipour Sharabiany, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2023
    Abstract
    One of the most crucial infrastructure requirements of integrated systems is designing and providing a comprehensive architecture for implementation, support and improvement of their smart services or platforms. And without exception, smart University would also require a responsive architecture for the integration and consolidation of its current and future systems and services. Providing higher level of academic services, integration and consolidation support, and cost accounting (including 'cloud storage', 'computing', 'network communication and bandwidth' and energy consumption) can be placed as pivotal issues among smart university services. In this article, a basic definition of a... 

    Correction to: Oseledets Splitting and Invariant Manifolds on Fields of Banach Spaces (Journal of Dynamics and Differential Equations, (2021), 10.1007/s10884-021-09969-1)

    , Article Journal of Dynamics and Differential Equations ; 2021 ; 10407294 (ISSN) Ghani Varzaneh, M ; Riedel, S ; Sharif University of Technology
    Springer  2021
    Abstract
    The original version of this article unfortunately contained a typo in co-author name. The author name is “Mazyar Ghani Varzaneh” instead it was published incorrectly as “M. Mazyar Ghani Varzaneh”. © 2021, Springer Science+Business Media, LLC, part of Springer Nature  

    Oseledets splitting and invariant manifolds on fields of banach spaces

    , Article Journal of Dynamics and Differential Equations ; Volume 35, Issue 1 , 2023 , Pages 103-133 ; 10407294 (ISSN) Ghani Varzaneh, M ; Riedel, S ; Sharif University of Technology
    Springer  2023
    Abstract
    We prove a semi-invertible Oseledets theorem for cocycles acting on measurable fields of Banach spaces, i.e. we only assume invertibility of the base, not of the operator. As an application, we prove an invariant manifold theorem for nonlinear cocycles acting on measurable fields of Banach spaces. © 2021, The Author(s)  

    Correction to: Oseledets splitting and invariant manifolds on fields of banach spaces (journal of dynamics and differential equations, (2023), 35, 1, (103-133), 10.1007/s10884-021-09969-1)

    , Article Journal of Dynamics and Differential Equations ; Volume 35, Issue 1 , 2023 , Pages 983- ; 10407294 (ISSN) Ghani Varzaneh, M ; Riedel, S ; Sharif University of Technology
    Springer  2023
    Abstract
    A correction to this paper has been published: https://doi.org/10.1007/s10884-021-09990-4 © 2021, Springer Science+Business Media, LLC, part of Springer Nature  

    Oseledets splitting and invariant manifolds on fields of banach spaces

    , Article Journal of Dynamics and Differential Equations ; 2021 ; 10407294 (ISSN) Ghani Varzaneh, M. M ; Riedel, S ; Sharif University of Technology
    Springer  2021
    Abstract
    We prove a semi-invertible Oseledets theorem for cocycles acting on measurable fields of Banach spaces, i.e. we only assume invertibility of the base, not of the operator. As an application, we prove an invariant manifold theorem for nonlinear cocycles acting on measurable fields of Banach spaces. © 2021, The Author(s)  

    The most optimal barrier height of InGaN light-emitting diodes

    , Article Applied Physics A: Materials Science and Processing ; Volume 127, Issue 2 , 2021 ; 09478396 (ISSN) Alam Varzaneh Isfahani, M. H ; Faez, R ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2021
    Abstract
    In this paper, a novel structure is presented in order to decrease the polarization charges of quantum wells. The main purpose of this design is to make electron and hole wavefunctions closer to each other and to increase overlap integral following an increase of radiative recombination rates and internal quantum efficiency. Furthermore, carriers will be increased and become more balanced and identical which leads to an increase in efficiency of light-emitting diodes. The improvement of radiative recombination rates is studied in new structures. Energy bands diagram, carriers density, current density–voltage, and power density–current density are used to demonstrate the superior performance... 

    The most optimal barrier height of InGaN light-emitting diodes

    , Article Applied Physics A: Materials Science and Processing ; Volume 127, Issue 2 , 2021 ; 09478396 (ISSN) Alam Varzaneh Isfahani, M. H ; Faez, R ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2021
    Abstract
    In this paper, a novel structure is presented in order to decrease the polarization charges of quantum wells. The main purpose of this design is to make electron and hole wavefunctions closer to each other and to increase overlap integral following an increase of radiative recombination rates and internal quantum efficiency. Furthermore, carriers will be increased and become more balanced and identical which leads to an increase in efficiency of light-emitting diodes. The improvement of radiative recombination rates is studied in new structures. Energy bands diagram, carriers density, current density–voltage, and power density–current density are used to demonstrate the superior performance... 

    A dynamical theory for singular stochastic delay differential equations i: linear equations and a multiplicative ergodic theorem on fields of banach spaces

    , Article SIAM Journal on Applied Dynamical Systems ; Volume 21, Issue 1 , 2022 , Pages 542-587 ; 15360040 (ISSN) Ghani Varzaneh, M ; Riedel, S ; Scheutzow, M ; Sharif University of Technology
    Society for Industrial and Applied Mathematics Publications  2022
    Abstract
    We investigate singular stochastic delay differential equations (SDDEs) in view of their long-time behavior. Using Lyons's rough path theory, we show that SDDEs can be solved pathwise and induce a continuous stochastic flow on the space of (Gubinelli's) controlled paths. In the language of random dynamical systems, this result shows that SDDEs induce a continuous cocycle on random fibers, or, more precisely, on a measurable field of Banach spaces. We furthermore prove a multiplicative ergodic theorem (MET) on measurable fields of Banach spaces that applies under significantly weaker structural and measurability assumptions than preceding METs. Applying it to linear SDDEs shows that the... 

    An Introduction to Langlands Program

    , M.Sc. Thesis Sharif University of Technology Hatami Varzaneh, Omid (Author) ; Pournaki, Mohammadreza (Supervisor)
    Abstract
    The Weil group WF is assigne to every local field F. Langlands Correspondence is a bijetion between semisimple two-dimensional Deligne representations of Weil Group WF and irreducible representations of GL2(F) which fixes assigned L-functions and local constants. In this thesis we have classified an important class of irreducible representations of GL(2) over local fields called Principal Series. We also tried to give a taste of Langlands Correspondence to the reader. First we explain preliminaries and introduce locally profinite groups and their smooth representations. Then we classify representations of GL2(F) when F is finite. Then we study GL2(F) when F is a local field. Finally we... 

    Comparison models evaluating countermeasures at Highway-Railway Grade Crossings

    , Article ICTIS 2013: Improving Multimodal Transportation Systems - Information, Safety, and Integration - Proceedings of the 2nd International Conference on Transportation Information and Safety ; 2013 , Pages 1934-1945 ; 9780784413036 (ISBN) Ghafouri, R ; Bagheri, M ; Sharif University of Technology
    2013
    Abstract
    This paper reviews the literature concerning the effectiveness of countermeasures at Highway-Railway Grade Crossings (HRGC). HRGC are considered as the hotspots in railway transportation systems. So far, there has been significant discussion about different types of countermeasure to mitigate the risk of accidents at HRGC. Different approaches have been developed about the effectiveness of the countermeasures including the Before-After and Cross-Sectional. This paper compares all different studies to evaluate the effectiveness of countermeasure in reduction of accident frequency and severity  

    Topics in Measurability and Integrability in Constructive Analysis

    , Ph.D. Dissertation Sharif University of Technology Ghafouri, Zahra (Author) ; Ardeshir, Mohammad (Supervisor)
    Abstract
    In this thesis, we investigate constructive measure theory in two schools of constructivism; intuitionistic mathematics and Bishop’s constructive mathematics.In this regard, first, we examine some classical propositions on measurability in both schools. Then we give a comparison between measurability in the two schools  

    An Efficient Network for Real-Time Semantic Segmentation

    , M.Sc. Thesis Sharif University of Technology Ghafouri, Masoud (Author) ; Kasaei, Shohreh (Supervisor)
    Abstract
    In real-time semantic segmentation, images are divided into predefined semantic regions at a speed exceeding 30 frames per second, and each point of the image is labeled with a category. The output of this fundamental task is to produce a representation that is comprehensible to computers for further processing in applications such as autonomous vehicles, robotics, and augmented reality. This task pursues two conflicting goals: improving the accuracy of segmentation and increasing its speed. Previous research has enhanced segmentation speed using lightweight and multi-branch structures and improved accuracy using attention mechanisms. Depth map alongside color image can lead to better... 

    Approximation Algorithms for Clustering Points in the Data Stream Model

    , M.Sc. Thesis Sharif University of Technology Hatami Varzaneh, Behnam (Author) ; Zarrabi Zadeh, Hamid (Supervisor)
    Abstract
    The k-center problem—covering a set of points using k congruent balls with minimum radius—is a well-known clustering model in computer science with a wide range of applications. The k-center is a well known NP-Hard problem. In this thesis, we focus on the k-center problem with outliers in high dimensional data streams. Due to increase in data size, we focus on the data stream model of the problem. Moreover, in real-world applications, where input points are noisy, it is very important to consider outliers. In this thesis, we study 1-center and 2-center with outliers in high dimensional data streams in Euclidean space. We provide a 1:7-approximation streaming algorithm for 1-center with z... 

    Dynamical Properties of Rough Delay Equations

    , Ph.D. Dissertation Sharif University of Technology Ghani Varzaneh, Mazyar (Author) ; Zohuri Zangeneh, Bijan (Supervisor)
    Abstract
    In this monograph, we investigate the long-time behavior of stochastic delay equations. Our approach is random dynamical systems, and we solve our equation in the rough path point of view. Namely, we deal with the singular case, i.e., when the delay terms also are appearing in the diffusion part. Although we can solve the equation using the classical tools of stochastic analysis, the main obstacle is the lack of flow property. More precisely, the solution does not depend continuously on the initial value. To solve this problem, we define this property differently. We will show how we can generate a flow property on fields of Banach spaces using rough path theory. As a consequence, we prove... 

    Time-Cost efficient scheduling algorithms for executing workflow in infrastructure as a service clouds

    , Article Wireless Personal Communications ; Volume 103, Issue 3 , 2018 , Pages 2035-2070 ; 09296212 (ISSN) Ghafouri, R ; Movaghar, A ; Mohsenzadeh, M ; Sharif University of Technology
    Springer New York LLC  2018
    Abstract
    Cloud Computing enables delivery of IT resources over the Internet and follows the pay-as-you-go billing model. The cloud infrastructures can be used as an appropriate environment for executing of workflow applications. To execute workflow applications in this environment, it is necessary to develop the workflow scheduling algorithms that consider different QoS parameters such as execution time and cost. Therefore, in this paper we focus on two criteria: total completion time (makespan) and execution cost of workflow, and propose two heuristic algorithms: MTDC (Minimum Time and Decreased Cost) which aims to create a schedule that minimizes the makespan and decreases execution cost, and CTDC... 

    A budget constrained scheduling algorithm for executing workflow application in infrastructure as a service clouds

    , Article Peer-to-Peer Networking and Applications ; 2018 , Pages 1-28 ; 19366442 (ISSN) Ghafouri, R ; Movaghar, A ; Mohsenzadeh, M ; Sharif University of Technology
    Springer New York LLC  2018
    Abstract
    Cloud computing technology, which is a new model of service provisioning in distributed systems, has been raised as a way to execute workflow applications. To profit from this technology for executing workflow applications, it is necessary to develop workflow scheduling algorithms that consider different QoS parameters such as execution time and cost. Therefore, in this paper, we focus on two criteria: makespan (completion time) and execution cost of workflow application and propose a scheduling algorithm named CB-DT (Constrained Budget-Decreased Time) which aims to create a schedule that decreases the makespan while satisfying the budget constraint of the workflow application. In the... 

    A budget constrained scheduling algorithm for executing workflow application in infrastructure as a service clouds

    , Article Peer-to-Peer Networking and Applications ; Volume 12, Issue 1 , 2019 , Pages 241-268 ; 19366442 (ISSN) Ghafouri, R ; Movaghar, A ; Mohsenzadeh, M ; Sharif University of Technology
    Springer New York LLC  2019
    Abstract
    Cloud computing technology, which is a new model of service provisioning in distributed systems, has been raised as a way to execute workflow applications. To profit from this technology for executing workflow applications, it is necessary to develop workflow scheduling algorithms that consider different QoS parameters such as execution time and cost. Therefore, in this paper, we focus on two criteria: makespan (completion time) and execution cost of workflow application and propose a scheduling algorithm named CB-DT (Constrained Budget-Decreased Time) which aims to create a schedule that decreases the makespan while satisfying the budget constraint of the workflow application. In the... 

    Power system stability improvement using self-tuning fuzzy logic controlled STATCOM

    , Article EUROCON 2007 - The International Conference on Computer as a Tool, Warsaw, 9 September 2007 through 12 September 2007 ; December , 2007 , Pages 1444-1449 ; 142440813X (ISBN); 9781424408139 (ISBN) Ghafouri, A ; Zolghadri, M. R ; Ehsan, M ; Sharif University of Technology
    2007
    Abstract
    This paper presents the application of a fuzzy logic controlled Static Compensator (STATCOM) to improve stability of power system. The nonlinear fuzzy logic controller is used to overcome the problems generated by different uncertainties exist in power systems. Different input variables are used to design the controller. Parameters of the proposed controller are adjusted by means of Neural Network techniques to improve performance of the system. Proposed controller is implemented on a single machine infinite bus system to confirm the performance of the controller through simulation results  

    Vibrational analysis of Ag, Cu and Ni nanobeams using a hybrid continuum-atomistic model

    , Article International Journal of Mechanical Sciences ; Volume 165 , 2020 Ghafouri Pourkermani, A ; Azizi, B ; Nejat Pishkenari, H ; Sharif University of Technology
    Elsevier Ltd  2020
    Abstract
    An important issue in the study of the nanostructures behaviors is the surface effects, which increases with the increase of the surface-to-volume ratio. Continuum theories are capable of modeling structures at micro and larger scales with enough precision and low computational costs. However, these theories are unable to predict the mechanical properties of nanostructures accurately. On the other hand, due to their high precision, atomistic modeling techniques are extensively employed for the study of systems at nanoscale; however, computational costs of these techniques are relatively high. In this research, we aim to study the vibrational behavior of nanobeams made of three FCC metals;...