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    The Role of Symmetry in Quantifying Information

    , M.Sc. Thesis Sharif University of Technology Jabbari, Ghazal (Author) ; Shafie, Afshin (Supervisor)
    Abstract
    In this thesis we want to discuss about a new approach about information. Using this approach, Scott Muller builds his formalism on two basic concepts: distinguishablity and symmetry. His claim is that there is an inverse relation between symmetry and information. It means that if we have a symmetric system we need less information (Than an asymmetric system) to describe it. Here, we are going to explore the role and significance of symmetry in probabilistic distributions of the double-slit experiment, and we want to show if there is a predetermined relation between symmetry and information or not.
     

    Determine the Thickness of Boundary Layer in Free Convection on the Vertical Plate With Uniform Heat Flux

    , M.Sc. Thesis Sharif University of Technology ainali, Omid (Author) ; Shafie, Behshad (Supervisor)
    Abstract
    Experiments were performed to explore the free convective hat transfer characteristics of water based nanofluids. Experiments of natural convection over a vertical flat plate with constant heat flux in water-based nanofluids with Ag and TiO2 nanoparticles were performed. Velocity boundary layer measured using PIV method. Also convective heat transfer coefficient obtained using three thermometers behind the wall. Various test cases with different heat fluxes on the wall are considered. Two volumetric concentrations of Ag nanofluid, 1% and 2%, and TiO2 nanofluid, 1% and 2%, were tested in the present study. It was shown that, with increasing nanofluid concentration, velocity boundary layer... 

    Finite-Control-Set Model Predictive Control for Doubly Fed Induction Generator of a Floating Offshore Wind Turbine

    , M.Sc. Thesis Sharif University of Technology Shafie, Hossein (Author) ; Sadati, Naser (Supervisor)
    Abstract
    The purpose of this project is designing a controller for a floating offshore wind turbine to exctract maximum power from wind energy in the first operating region of wind turbine. The NREL 5 MW OC3-Hywind floating wind turbine with BARGE platform will be used for this project. By using Turbsim software, proper wind profile for the first operating region of wind turbine will be produced. This profile will be excecuted for the FAST software that is simulates the mechanical part of wind turbine. By implementing the doubly fed induction generator in Simulink enviroment and designing the controller for doubly fed induction generator, the desired torque for maximizing the exctraction power of... 

    Design and Analysis of Engine Lubrication System for SP1 Engine

    , M.Sc. Thesis Sharif University of Technology Mohamadlou, Mohamad (Author) ; Shafie, Mohamad Behshad (Supervisor)
    Abstract
    Oil pump is a prominent part which has been described as a vehicle heart. Any malfunction or improper design may lead to engine failure. beside engine, proper design of oil route and lubrication system of vehicle, are main factor in engine design, which provide higher efficiency with lower pressure drop. lubrication system should be able to provide required pressure and flow of oil in vast range of engine rotation speed. also minimum energy waste in higher rpm is a key factor which happens due to reverse flow from output to input of pump in the relief valve. The aim of this thesis focus on design of oil pump and lubrication system of 4 cylinder 16 valve of 1600 cc inline engine. which is... 

    Determining Informative Content based on Customer Needs Using Deep Learning on Customer Reviews

    , M.Sc. Thesis Sharif University of Technology Shafie, Amir Hossein (Author) ; Najmi, Manoochehr (Supervisor)
    Abstract
    Right from the start, customer need has been the center of focus for every firm. It’s hard to find a single firm which is not focused and customer centric. Firms are spending millions of dollars every year to make customer surveys and interviews to find out customer needs, new product development and brand perceptions. After the invention of the internet and the rise of home computers people started to act differently. Most of the purchases went online and customer reviews flooded over the internet. They freely express their mind on websites which is a rich resource for market researchers and marketing firms. UGC is rich enough to analyze customer’s thoughts and needs. The volume of UGC has... 

    Quantum Aspects of The Origin of Life

    , M.Sc. Thesis Sharif University of Technology Khezr Seddigh Mazinani, Shobeir (Author) ; Shafie, Afshin (Supervisor)
    Abstract
    Many have claimed that quantum mechanics is playing a non-trivial, i.e. further from merely governing atomic and molecular realm, in living. If so, clearly quantum mechanics should have played a key role in the origin of life especially in the transition from chemical evolution to biological (Darwinian) evolution. Long before quantum aspects of living systems came to focus, It was known that all the amino acids are right handed and all the sugars are left handed in living systems. Bio-molecules having the same sense of chirality, i.e. optical activity, are called biohomochirality. Detailed studies on the structure and functioning of biomolecules buttressed the idea that the selection of... 

    Comparative Study of Gasoline and Ethanol Combustion in a SI Engine Combustion Chamber Using Closed Cycle CFD Simulation

    , M.Sc. Thesis Sharif University of Technology Rezaie, Milad (Author) ; Hosseini, Vahid (Supervisor) ; Shafie, Behshad (Supervisor)
    Abstract
    At today’s crowded world, the importance of automobile transportation is obvious for all. The fossil fuel pollution crisis has increased the need for renewable-fueled engines with higher efficiency and lower emissions. Meanwhile, biofuels have received more attention for reasons such as carbon dioxide cycling, Affordability and availability. However, despite these benefits biofuels require crops such as corn or potatoes to produce, which in turn produce other environmental pollution. On the other hand, concerns have been raised as to whether the use of these fuels increases the amount of other pollutants, except for carbon dioxide, or not. Extensive researches in this field by experimental,... 

    Impact of voltage violation penalty cost on distribution system operation considering electric vehicle

    , Article 2023 International Conference on Future Energy Solutions, FES 2023 ; 2023 ; 979-835033230-8 (ISBN) Ebrahimi, M ; Ebrahimi, M ; Laaksonen, H ; Shafie-Khah, M ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2023
    Abstract
    In the future, the widespread adoption of electric vehicle parking lots (EVPLs) may introduce operational challenges like voltage limit violations in distribution networks. However, EVPLs can potentially relieve these voltage limit violations by acting as flexible loads and providing reactive power support. In this paper, the impact of EVPLs on the optimal operation of the distribution network is investigated with a focus on their potential capability for reactive power support in a scenario that the distribution system operator (DSO) is committed to pay a penalty cost to customers if voltage limits are violated. Our results show that flexible charging of Electric Vehicles (EVs) and reactive... 

    Fluorescent Sensor from N-doped Carbon Quantum Dots for Detection of Hg2+ and I- Ions in Environmental Water

    , M.Sc. Thesis Sharif University of Technology Shafie, Saeedeh (Author) ; Samadfam, Mohammad (Supervisor) ; Sadjadi, Sudehsadat (Co-Supervisor)
    Abstract
    In this thesis, nitrogen-doped carbon quantum dots were synthesized from anhydrous trisodium citrate and arginine in water solvent by the hydrothermal method, which was used to develop an on-off-on fluorescence sensor. The hydrothermal method is a suitable method for the synthesis of nitrogen-doped carbon quantum dots due to its affordability, availability, rapidity, and safety. Characterization of nitrogen-doped carbon quantum dots was divided into two parts: in the first part, optical properties were investigated using fluorescence photoluminescence (PL) spectrometer and ultraviolet-visible spectrometer (UV-Vis), and in the second part, Fourier transform infrared spectrometry (FTIR),... 

    Simulation of Blood Flow Subjected to Magnetic Field

    , M.Sc. Thesis Sharif University of Technology Aalizadeh, Farhad (Author) ; Moosavi, Ali (Supervisor) ; Shafie, Mohammad Behshad (Supervisor)
    Abstract
    Considering the fact that there is a blood flow inside the vessels it is possible that blood flow is always associated with fouling and this may decrease the blood flow when a blood vessel is injured, the cells of your blood bond together to form a blood clot. The blood clot helps you stop bleeding. Blood clots are made of a combination of blood cells, platelets (small sticky cells that speed up the clot-making process), and fibrin (protein that forms a thread-like mesh to trap cells). Doctors call this kind of blood clot a “thrombus.” We study the effects of different parameters on the deposition of Nanoparticles on the surface of a bump in the blood vessels by the magnetic field. The... 

    Optimization of Multi-Layered PCM Arrangement for Battery 18650 Thermal Management

    , M.Sc. Thesis Sharif University of Technology Pakravan, Shayan (Author) ; Aryanpour, Masoud (Supervisor) ; Shafie, Mohammad Behshad (Supervisor)
    Abstract
    Lithium-ion batteries have the ability to store a significant amount of energy and work at high power, which has led to the wide spread of their use in various industries. In high-power applications, battery heat management increases lifespan, safety, and reduces battery power loss. In this study, the heat management of a very common and widely used 18650 battery using multi-layered phase change material has been investigated. The reason for using multiple layers is that each phase change material has its own weaknesses in addition to its advantages. It is expected that with the proper use of several phase change materials in the thermal management system, the materials will reduce the... 

    Impact of solar energy on the integrated operation of electricity-gas grids

    , Article Energy ; Volume 183 , 2019 , Pages 844-853 ; 03605442 (ISSN) Badakhshan, S ; Hajibandeh, N ; Shafie khah, M ; Catalão, J. P. S ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    Photovoltaic energy is one of the clean and efficient energies which has been developing quickly in the last years. As the penetration of solar plants is increasing in the electricity network, new problems have arisen in network operation. This paper models a high penetration factor of solar energy in the electricity network and investigates the impact of solar energy growth on both the generation schedule of different power plants and in the natural gas transmission network. Fuel management of gas power plants is modeled through simulation of the natural gas transmission network. To this end, an increase in the penetration of solar energy in the electricity network inevitably leads to a... 

    Latent Heat Energy Vapor Storage in Phase Change Materials in Solar Stills

    , M.Sc. Thesis Sharif University of Technology Khalilmoghadam, Pooria (Author) ; Rajabi, Abbas (Supervisor) ; Shafie, Mohammad Behshad (Supervisor)
    Abstract
    Providing fresh water, ending fossil fuels, using renewable energy and achieving a clean biological environment in different parts of the world especially in Iran beside having access to many saline water sources, Shows the need for research in the field of solar still desalination. The goal of current study is to increase the performance of the solar still system through the use of an energy storage system and an additional condenser. Adding an additional condenser to a conventional solar still lead to an increase in the rate of evaporation and consequently increase the production of the system. Also, by collecting distilled water from the sidewalls, the amount of water produced... 

    Prioritizing the effectiveness of a comprehensive set of demand response programs on wind power integration

    , Article International Journal of Electrical Power and Energy Systems ; Volume 107 , 2019 , Pages 149-158 ; 01420615 (ISSN) Hajibandeh, N ; Ehsan, M ; Soleymani, S ; Shafie khah, M ; Catalão, J. P. S ; Sharif University of Technology
    Elsevier Ltd  2019
    Abstract
    The environmental targets set by power sectors throughout the world are the main drivers toward increasing the share of variable renewable energy sources (VRESs). Growth of VRESs will lead to a higher demand for operational flexibility due to their stochastic nature. Traditionally, conventional generation units provide the major share of additional required flexibility that may result in a higher depreciation. Motivated by this challenge, this paper investigates the potential of Demand Response (DR) as an emerging alternative in systems with significant amounts of wind power. To this end, a comprehensive set of DR programs including tariff-based, incentive-based and combinational DR programs... 

    The mutual impact of demand response programs and renewable energies: a survey

    , Article Energies ; Volume 10, Issue 9 , 2017 ; 19961073 (ISSN) Hajibandeh, N ; Ehsan, M ; Soleymani, S ; Shafie Khah, M ; Catalão, J. P. S ; Sharif University of Technology
    2017
    Abstract
    Renewable energies as a solution for environmental issues have always been a key research area due to Demand Response Programs (DRPs). However, the intermittent nature of such energies may cause economic and technological challenges for Independent System Operators (ISOs) besides DRPs, since the acceptable effective solution may exceed the requirement of further investigations. Although, previous studies emphasized employing Demand Response and Renewable Energies in power systems, each problem was investigated independently, and there have been few studies which have investigated these problems simultaneously. In these recent studies, authors neither analyzed these problems simultaneously... 

    Network-constrained optimal scheduling of multi-carrier residential energy systems: a chance-constrained approach

    , Article IEEE Access ; Volume 9 , 2021 , Pages 86369-86381 ; 21693536 (ISSN) Habibifar, R ; Ranjbar, H ; Shafie Khah, M ; Ehsan, M ; Catalão, J. P. S ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2021
    Abstract
    This paper presents a day-ahead scheduling approach for a multi-carrier residential energy system (MRES) including distributed energy resources (DERs). The main objective of the proposed scheduling approach is the minimization of the total costs of an MRES consisting of both electricity and gas energy carriers. The proposed model considers both electrical and natural gas distribution networks, DER technologies including renewable energy resources, energy storage systems (ESSs), and combined heat and power. The uncertainties pertinent to the demand and generated power of renewable resources are modeled using the chance-constrained approach. The proposed model is applied on the IEEE 33-bus... 

    Analysis of contractions in system graphs: Application to state estimation

    , Article 2021 IEEE International Conference on Autonomous Systems, ICAS 2021, 11 August 2021 through 13 August 2021 ; 2021 ; 9781728172897 (ISBN) Doostmohammadian, M ; Charalambous, T ; Shafie Khah, M ; Rabiee, H. R ; Khan, U. A ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2021
    Abstract
    Observability and estimation are closely tied to the system structure, which can be visualized as a system graph-a graph that captures the inter-dependencies within the state variables. For example, in social system graphs such inter-dependencies represent the social interactions of different individuals. It was recently shown that contractions, a key concept from graph theory, in the system graph are critical to system observability, as (at least) one state measurement in every contraction is necessary for observability. Thus, the size and number of contractions are critical in recovering for loss of observability. In this paper, the correlation between the average-size/number of... 

    Pave the way for sustainable smart homes: A reliable hybrid AC/DC electricity infrastructure

    , Article Electric Power Systems Research ; Volume 210 , 2022 ; 03787796 (ISSN) Ardalan, C ; Vahidinasab, V ; Safdarian, A ; Shafie khah, M ; Catalão, J. P. S ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    The development of emerging smart grid technologies has led to more and more penetration of renewable energy resources and electric energy storage in the residential sectors. Besides, owing to the significant evolution of power electronic devices, there is a rapid growth in penetration of DC loads and generations, such as PV and electric vehicles (EVs), into the buildings and homes as a building block of the future smart cities. This is despite the fact that the electricity infrastructure of the conventional buildings is designed based on AC electricity and as a result, there would be a lot of losses due to the frequent power conversion from AC to DC and vice versa. Besides, according to a... 

    Hybrid stochastic/robust flexible and reliable scheduling of secure networked microgrids with electric springs and electric vehicles

    , Article Applied Energy ; Volume 300 , 2021 ; 03062619 (ISSN) Norouzi, M ; Aghaei, J ; Pirouzi, S ; Niknam, T ; Fotuhi Firuzabad, M ; Shafie khah, M ; Sharif University of Technology
    Elsevier Ltd  2021
    Abstract
    Electric spring (ES) as a novel concept in power electronics has been developed for the purpose of dealing with demand-side management. In this paper, to conquer the challenges imposed by intermittent nature of renewable energy sources (RESs) and other uncertainties for constructing a secure modern microgrid (MG), the hybrid distributed operation of ESs and electric vehicles (EVs) parking lot is suggested. The proposed approach is implemented in the context of a hybrid stochastic/robust optimization (HSRO) problem, where the stochastic programming based on unscented transformation (UT) method models the uncertainties associated with load, energy price, RESs, and availability of MG equipment.... 

    Security-constrained unit commitment with natural gas pipeline transient constraints

    , Article IEEE Transactions on Smart Grid ; Volume 11, Issue 1 , 2020 , Pages 118-128 Badakhshan, S ; Ehsan, M ; Shahidehpour, M ; Hajibandeh, N ; Shafie Khah, M ; Catalao, J. P. S ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2020
    Abstract
    The interdependencies of power systems and natural gas networks have increased due to the additional installations of more environmental-friendly and fast-ramping natural gas power plants. The natural gas transmission network constraints and the use of natural gas for other types of loads can affect the delivery of natural gas to generation units. These interdependencies will affect the power system security and economics in day-ahead and real-time operations. Hence, it is imperative to analyze the impact of natural gas network constraints on the security-constrained unit commitment (SCUC) problem. In particular, it is important to include natural gas and electricity network transients in...