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    Exergoenvironmental and exergoeconomic modelling and assessment in the complex energy systems

    , Article Iranian Journal of Chemistry and Chemical Engineering ; Volume 41, Issue 3 , 2022 , Pages 989-1002 ; 10219986 (ISSN) Norouzi, N ; Choubanpisheh, S ; Talebi, S ; Khajehpour, H ; Sharif University of Technology
    Iranian Institute of Research and Development in Chemical Industries  2022
    Abstract
    Traditionally energy systems were analyzed technically, but current environmental issues and considerations have put new constraints on the planning and managing of energy systems. Such an exergoeconomic and exergoenvironmental analysis were born. This analysis is aimed to describe the necessity and application of a new concept in environmental liability accounting based on physical quantities to overcome the weaknesses of the developed allocation methods and the internalization of external environmental damages. The proposed method is modified in environmental analysis to consider the effect of non-energy flows on a macro-surface energy system. As a case study, this method is tuned for a... 

    IF band width optimization of envelope detection system in presence of phase noise

    , Article IET International Radar Conference 2009, Guilin, 20 April 2009 through 22 April 2009 ; Issue 551 CP , 2009 ; 9781849190107 (ISBN) Tavan, M ; Mirzaei, S ; Norouzi, Y ; Sharif University of Technology
    2009
    Abstract
    In many radar and EW applications, after some processing, the envelope of the received pulse is calculated and is used for target detection. Most of the time only the effect of thermal noise is considered in such detectors, but in most of the practical applications, before envelope detection, the signal should be down converted from radio frequency (RF) to an intermediate frequency (IF). In this case, the phase noise of the local oscillator will affect the signal, too. Surprisingly, in contrast to thermal noise, the effect of phase noise on the envelope of signal becomes more considerable whenever the IF bandwidth is decreased. So there exists an optimum IF bandwidth for the receiver. In... 

    Approximating the distribution of flaws in magnetic materials using the generalized inverse

    , Article 2011 IEEE International Conference on Imaging Systems and Techniques, IST 2011 - Proceedings, 17 May 2011 through 18 May 2011, Batu Ferringhi ; May , 2011 , Pages 137-141 ; 9781612848969 (ISBN) Ravanbod, H ; Abdollahi Jahdi, S ; Norouzi, E ; Sharif University of Technology
    2011
    Abstract
    Non-destructive identification of voids in ferromagnetic materials is of great importance for industrial applications. Magnetic flux leakage technique is used here to examine the defected structure. To this end, an inverse problem should be solved in order to infer the location and depth of internal flaws from the measured leaked magnetic signals. Currently generalized inverse method and singular value decomposition are used for solving such inverse problem. Considering the cracks separation has significant effect on the absolute value of magnetic flux leakage signals, we study different distributions of cracks. In this paper, the magnetic dipole model is proposed to reconstruct the extent... 

    Angle of arrival-based target localisation with low Earth orbit satellite observer

    , Article IET Radar, Sonar and Navigation ; Volume 10, Issue 7 , 2016 , Pages 1186-1190 ; 17518784 (ISSN) Norouzi, Y ; Kashani, E. S ; Ajorloo, A ; Sharif University of Technology
    Institution of Engineering and Technology  2016
    Abstract
    In triangulation (or angle of arrival) target localisation method, the surface of the Earth is approximated by a flat plate. This approximation, while acceptable for low-altitude observers (such as unmanned aerial vehicles), is not a correct model for high-altitude observers (such as low Earth orbit - LEO satellites). In this study, the authors have discussed triangulation method using a LEO satellite observer over a spherical surface and have shown that, using spherical trigonometry and singular value decomposition (SVD), a straight forward solution can be found for target localisation problem. Also, error bound is discussed and analysed using both SVD as well as simulation. © The... 

    Electrochemical potential noise analysis of Cu-BTA system using wavelet transformation

    , Article Journal of Electroanalytical Chemistry ; Volume 633, Issue 1 , 2009 , Pages 240-245 ; 15726657 (ISSN) Attarchi, M ; Roshan, M. S ; Norouzi, S ; Sadrnezhaad, S. K ; Jafari, A ; Sharif University of Technology
    Elsevier  2009
    Abstract
    Electrochemical potential noise analysis was used to investigate corrosion behavior of copper electrodes in presence of 0.001, 0.005, 0.01 and 0.02 M benzotriazole (BTA) inhibitor. Energy distribution of the potential noise was obtained from wavelet transformation using the 4th order Daubechies pattern. Two lowest frequencies were added-up and fitted to the impulse response of the first order circuit to achieve the time-constant vs. concentration (T-C) diagram. T-C diagram can be used either as a conventional diagram of inhibition efficiency or a tool for evaluation of the surface film dielectric constant. The assumptions made in this treatment were confirmed by EIS method. © 2009 Elsevier... 

    Heavy oil thermal conversion and refinement to the green petroleum: A petrochemical refinement plant using the sustainable formic acid for the process

    , Article Biointerface Research in Applied Chemistry ; Volume 10, Issue 5 , 2020 , Pages 6088-6100 Norouzi, N ; Talebi, S ; Fabi, M ; Khajehpour, H ; Sharif University of Technology
    AMG Transcend Association  2020
    Abstract
    In this study, heat oil conversion experiments using steam and formic acid as a hydrogen carrier be carried out in a batch reactor at T = 380 degrees of Celsius and P = 165 bar. Material balance and product distribution were calculated after the process. Properties of crude oil before and after thermal conversion, including viscosity, API gravity, SARA measurement, and elemental analysis, were analyzed. It has been presented that the use of formic acid as a hydrogen carrier solvent reduces the formation of coke and gaseous products and enhances the performance of liquid products. Also, the viscosity of the refined oil decreased by 23.2% due to the addition of formic acid compared to the... 

    Exergy and exergoeconomic analysis of hydrogen and power cogeneration using an HTR plant

    , Article Nuclear Engineering and Technology ; Volume 53, Issue 8 , 2021 , Pages 2753-2760 ; 17385733 (ISSN) Norouzi, N ; Talebi, S ; Fani, M ; Khajehpour, H ; Sharif University of Technology
    Korean Nuclear Society  2021
    Abstract
    This paper proposes using sodium-cooled fast reactor technologies for use in hydrogen vapor methane (SMR) modification. Using three independent energy rings in the Russian BN-600 fast reactor, steam is generated in one of the steam-generating cycles with a pressure of 13.1 MPa and a temperature of 505 °C. The reactor's second energy cycles can increase the gas-steam mixture's temperature to the required amount for efficient correction. The 620 ton/hr 540 °C steam generated in this cycle is sufficient to supply a high-temperature synthesis current source (700 °C), which raises the steam-gas mixture's temperature in the reactor. The proposed technology provides a high rate of hydrogen... 

    Performance evaluation of k out of n detector

    , Article 14th European Signal Processing Conference, EUSIPCO 2006, Florence, 4 September 2006 through 8 September 2006 ; 2006 ; 22195491 (ISSN) Norouzi, Y ; Greco, M. S ; Nayebi, M. M ; Sharif University of Technology
    2006
    Abstract
    In this paper the problem of k out of n detection, between sequence of M random bits is addressed. The main application of the result is in a radar system, when we want to detect a target (with unknown time of arrival (TOA)), using binary integration. Another application is in ESM systems, when the system wants to detect the existence of a swept jammer or a gated noise jammer. But as any other mathematical problem, it may have some other applications. In this paper some simple equations for P fa and P d calculation of a detector which detects the existence of sequence of n ones between M random bits, is derived. These equations are then used to find the optimal detector structure in some... 

    Evolving data stream clustering based on constant false clustering probability

    , Article Information Sciences ; Volume 614 , 2022 , Pages 1-18 ; 00200255 (ISSN) Kashani, E. S ; Bagheri Shouraki, S ; Norouzi, Y ; Sharif University of Technology
    Elsevier Inc  2022
    Abstract
    Today's world needs new methods to deal with and analyze the ever-increasingly generated data streams. Two of the most challenging aspects of data streams are (i) concept drift, i.e. evolution of data stream over time, which requires the ability to make timely decisions against the high speed of receiving new data; (ii) limited memory storage and the impracticality of using memory due to the large amount of data. Clustering is one of the common methods to process data streams. In this paper, we propose a novel, fully-online, density-based method for clustering evolving data streams. In recent years, a number of methods have been proposed, which also have the ability to cluster data streams.... 

    Advances in skin regeneration: application of electrospun scaffolds

    , Article Advanced Healthcare Materials ; Volume 4, Issue 8 , 2015 , Pages 1114-1133 ; 21922640 (ISSN) Norouzi, M ; Boroujeni, S. M ; Omidvarkordshouli, N ; Soleimani, M ; Sharif University of Technology
    Wiley-VCH Verlag  2015
    Abstract
    The paucity of cellular and molecular signals essential for normal wound healing makes severe dermatological ulcers stubborn to heal. The novel strategies of skin regenerative treatments are focused on the development of biologically responsive scaffolds accompanied by cells and multiple biomolecules resembling structural and biochemical cues of the natural extracellular matrix (ECM). Electrospun nanofibrous scaffolds provide similar architecture to the ECM leading to enhancement of cell adhesion, proliferation, migration and neo tissue formation. This Review surveys the application of biocompatible natural, synthetic and composite polymers to fabricate electrospun scaffolds as skin... 

    Extended-gate field-effect transistor based sensor for detection of hyoscine n-butyl bromide in its pharmaceutical formulation

    , Article Analytical and Bioanalytical Electrochemistry ; Volume 12, Issue 2 , 2020 , Pages 238-249 Sheibani, S ; Mirzaie, S. I ; Fardmanesh, M ; Norouzi, P ; Sharif University of Technology
    Center of Excellence in Electrochemistry, Univ. of Tehran  2020
    Abstract
    A novel recognition method for selective determination of the hyoscine N-Butyl bromide (HBB), an antispasmodic agent for smooth muscles, was devised using extended gate field-effect transistor (EG-FET) as transducing unit. For this purpose a PVC membrane, containing hyoscine n-butyl-tetraphenyl borate ion-pair as recognition component, was coated on Ag/AgCl wire, which was connected to the extended metal gate. In optimal conditions, the linear range for HBB was 10-8-10-5 molL−1 with limit of detection 1.7×10-9 molL-1. The proposed sensor was applied in real sample, it showed fast response with high accuracy, and therefore it could be used as HPLC detector in the pharmaceutical samples in... 

    Minimum control effort trajectory planning and tracking of the CEDRA brachiation robot

    , Article Robotica ; Volume 31, Issue 7 , 2013 , Pages 1119-1129 ; 02635747 (ISSN) Meghdari, A ; Lavasani, S. M. H ; Norouzi, M ; Mousavi, M. S. R ; Sharif University of Technology
    2013
    Abstract
    The control of a brachiation robot has been the primary objective of this study. A brachiating robot is a type of a mobile arm that is capable of moving from branch to branch similar to a long-armed ape. In this paper, to minimize the actuator work, Pontryagin's minimum principle was used to obtain the optimal trajectories for two different problems. The first problem considers brachiation between fixed branches with different distance and height, whereas the second problem deals with the brachiating and catching of a moving target branch. Theoretical results show that the control effort in the proposed method is reduced by 25% in comparison with the target dynamics method which was proposed... 

    Optimal trajectory planning for brachiation robot on ladder with irregular branches

    , Article Proceedings of the ASME Design Engineering Technical Conference, 28 August 2011 through 31 August 2011 ; Volume 6, Issue PARTS A AND B , August , 2011 , Pages 1131-1137 ; 9780791854839 (ISBN) Meghdari, A ; Lavasani, S. M. H ; Mousavi, M. S. R ; Norouzi, M ; Sharif University of Technology
    2011
    Abstract
    This paper deals with control of the brachiation robot. The brachiation is a type of mobile robot that moves from branch to branch like a long-armed ape. Here, as a new innovation, Pontryagin's minimum principle is used to obtain the optimal trajectories for two different problems. The first problem is "Brachiation between fixed branches with different distance and height" and the second is "Brachiating and catching the moving target branch". Theoretical results show that the control effort in the proposed method is reduced by 25% in comparison with the "Target Dynamics" method which was proposed in prior articles for this robot. The obtained optimal trajectory also minimizes the brachiation... 

    Lower extremity kinematic analysis in male athletes with unilateral anterior cruciate reconstruction in a jump-landing task and its association with return to sport criteria

    , Article BMC Musculoskeletal Disorders ; Volume 20, Issue 1 , 2019 ; 14712474 (ISSN) Norouzi, S ; Esfandiarpour, F ; Mehdizadeh, S ; Yousefzadeh, N. K ; Parnianpour, M ; Sharif University of Technology
    BioMed Central Ltd  2019
    Abstract
    Background: Return to sport (RTS) criteria are widely being used to identify anterior cruciate ligament reconstructed (ACLR) athletes ready to return to sportive activity and reduce risk of ACL re-injury. However, studies show a high rate of ACL re-injury in athletes who passed RTS criteria. This indicates that the current RTS criteria might not be sufficient to determine return to sport time in ACLR athletes. Previous studies have reported a close association between altered lower limb kinematics and ACL re-injury. However, it is not clear how lower extremity kinematics differs between ACLR athletes who passed the RTS-criteria and who failed. This study compared lower extremity kinematics... 

    Flexibility pricing of integrated unit of electric spring and EVs parking in microgrids

    , Article Energy ; Volume 239 , 2022 ; 03605442 (ISSN) Norouzi, M ; Aghaei, J ; Pirouzi, S ; Niknam, T ; Fotuhi Firuzabad, M ; Sharif University of Technology
    Elsevier Ltd  2022
    Abstract
    Electric spring (ES) as a breakthrough in power electronics has led to a revolution in demand-side management. This paper presents flexible power management (FPM) of a networked microgrid (MG) in the presence of renewable energy sources (RESs) and flexibility sources (FSs). The FSs include the novel topology of the integrated unit of ES with electric vehicles (EVs) parking (IUEE) and incentive-based demand response program (DRP). The proposed FPM model is formulated as an optimization problem that minimizes the difference between the expected energy cost and the expected profit of FSs' flexibility subject to the AC optimal power flow (AC-OPF), RESs, FSs, and MG flexibility constraints. In... 

    Optimization of the flux distribution in magnetic flux leakage Testing

    , Article Materials Evaluation ; Volume 68, Issue 3 , 2010 , Pages 360-364 ; 00255327 (ISSN) Norouzi, E ; Ravanbod, H ; Sharif University of Technology
    2010
    Abstract
    Many factors cause degeneration of the measured signal in magnetic flux leakage (MFL). One of these factors is non-uniformity of the magnetic flux inside the sample under test. Uniformity of the magnetic flux results in smoother and more predictable signals from various discontinuity types and also a reduction in the eddy current distortions induced because of the movement of the magnetizing yoke. The goal of this research is to find a near-optimal length for the magnetizing yoke. Toward this end, yokes with different lengths are simulated with the finite element method and the quality of the distribution of the flux lines inside the sample is studied. In this way a criterion for... 

    Optimazing Tehran LDV Fleet Regarding Environmental and Economic Restrictions

    , M.Sc. Thesis Sharif University of Technology Norouzi, Saeed (Author) ; Hosseini, Vahid (Supervisor)
    Abstract
    Tehran is the most populated area in Iran and is one of the most densely populated cities in the world where almost 40 percent of all days have been classified as unhealthy for sensitive groups. According to emission inventory of Tehran over than 85 percent of emission are due to different types of vehicles. And light duty vehicles share more than 80 percent all vehicles and are responsible for most of carbon monoxide and nitrogen oxides emitted in Tehran atmosphere. In this study real emission factor of Hybrid Synergy vehicles which just have been introduced to Tehran fleet were tested under real conditions of streets. Data produced in this research have been combined with previous... 

    Joint time difference of arrival/angle of arrival position finding in passive radar

    , Article IET Radar, Sonar and Navigation ; Volume 3, Issue 2 , 2009 , Pages 167-176 ; 17518784 (ISSN) Norouzi, Y ; Derakhshani, M ; Sharif University of Technology
    2009
    Abstract
    Several target position finding methods are proposed in various papers mainly regarding sensor networks. However, the problem of position finding in passive radar systems is somewhat different from the general case of sensor networks. Generally, in a passive radar system, there are few receivers located at short distances when compared with the it distance from the target. In this case, a problem known as geometric dilution of precision (GDP) occurs, which considerably increases the error of many proposed methods. This phenomenon can even make the position finding equations non-solvable. Regarding this fact, we have developed a least mean square error (LMSE) based method, which uses both the... 

    Variance of the Topological Charge as an Order Parameter for the KT Model

    , M.Sc. Thesis Sharif University of Technology Norouzi, Hossein (Author) ; Rouhani, Shahin (Supervisor)
    Abstract
    XY Model due to topological defects (or vortex) has topological phase transition. According Kosterlitz-Thouless (KT) theory, phase transition is from low-temperature bounded vortices to high-temperature free vortices. XY model is appropriate choice for description of superfluidity in 2d thin films of . KT theory predicts universal jump in mass density of 2d superfluid in phase transition point. It is confirmed experimentally by Bishop and Reppy. All critical behavior of XY model is described with 2d coulomb gas, vortices are topological charges of the gas. KT predict variance of topological charge should obey of the “surface law vs perimeter law”, similar to behavior of Wilson loop in ... 

    Simulation of methane gas production process from animal waste in a discontinuous bioreactor

    , Article Biointerface Research in Applied Chemistry ; Volume 11, Issue 6 , 2021 , Pages 13850-13859 ; 20695837 (ISSN) Norouzi, N ; Khajehpour, H ; Sharif University of Technology
    AMG Transcend Association  2021
    Abstract
    Due to the importance of environmental protection and the need to use new energy and alternative to conventional fuels, renewable energy has received much attention. Due to this necessity, a discontinuous bioreactor producing methane gas from animal waste has been modeled and simulated in this research. Monod kinetics was used to express the relationship between the growth rate of microorganisms and substrate concentration. The fourth-order Rong Kuta numerical method solved the substrate consumption and production of microorganisms and methane gas. The effect of the initial concentration of microorganisms on methane production has also been investigated. The initial concentrations of...