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khoobi-shourkaei--mahdi
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Investigation on Effect of Additives on the Synthesis of Mesoporous Silica Nano Particles for Drug Delivery Applications
, M.Sc. Thesis Sharif University of Technology ; Nemati, Ali (Supervisor) ; Akbari, Hmid (Supervisor) ; Khoobi Shourkaei, Mahdi (Co-Supervisor)
Abstract
In recent years, the use of mesoporous silica nanoparticles as carriers of biological agents has increased. The use of nanometer dimensions in intra-body applications not only hides the particles from the view of macrophages and the body's immune system, but also causes the particles to enter the cells more easily through endocytosis. Template removal method is the most common method in the synthesis of mesoporous silica. In this method, the orderly arrangement of pattern-forming molecules is used to form pores. Until now, various types of organic materials have been used as pattern materials. The main goal is the synthesis of nanoparticles with the largest size of holes and the largest...
Investigation of Drop Phase Mass Transfer Coefficient During Rising Drops in a Pulse Sieved Plate Column in Presence of Nano Particles
, M.Sc. Thesis Sharif University of Technology ; Bastani, Daruoosh (Supervisor) ; Bahmanyar, Hossein (Supervisor)
Abstract
Nanofluids are new engineering materials with great potential for application in process industries. Their enhanced heat-transfer properties are reported in recent literatures. However, with respect to the influence of nanoparticles on mass transfer characteristics, limited number of studies available in the literature, deal primarily with gas-liquid systems. In this work, mass transfer performance and droplet behavior along a pulsed liquid-liquid extraction column, is studied where SiO2 nanoparticles with concentrations of 0.01, 0.05 and 0.1 vol% and different hydrophobicities are applied to the dispersed phase. Using ultrasonication, nanoparticles were dispersed in kerosene as the base...
Impact of penalty-reward mechanism on the performance of electric distribution systems and regulator budget
, Article IET Generation, Transmission and Distribution ; Vol. 4, issue. 7 , 2010 , p. 770-779 ; ISSN: 17518687 ; Fotuhi-Firuzabad, M ; Sharif University of Technology
2010
Abstract
As a part of the ongoing debate about competition in the electricity industry, regulators are increasingly considering performance-based regulation (PBR) as an alternative to improve the service quality. The fundamental principle behind PBR is that good performance should lead to higher profits, and poor performance should result in lower profits. A penalty-reward structure (PRS) in a PBR mechanism can enhance utility performance to align utility interests with customer's interests. During the implementation of PBR, regulators should spend or receive money to reward good performed utilities or penalised poor performed utilities, respectively. A technique is proposed, in this study, to not...
Impact of penalty-reward mechanism on the performance of electric distribution systems and regulator budget
, Article IET Generation, Transmission and Distribution ; Volume 4, Issue 7 , 2010 , Pages 770-779 ; 17518687 (ISSN) ; Fotuhi Firuzabad, M ; Sharif University of Technology
2010
Abstract
As a part of the ongoing debate about competition in the electricity industry, regulators are increasingly considering performance-based regulation (PBR) as an alternative to improve the service quality. The fundamental principle behind PBR is that good performance should lead to higher profits, and poor performance should result in lower profits. A penalty-reward structure (PRS) in a PBR mechanism can enhance utility performance to align utility interests with customer's interests. During the implementation of PBR, regulators should spend or receive money to reward good performed utilities or penalised poor performed utilities, respectively. A technique is proposed, in this study, to not...
Thermal Storage Modeling of One Building with and Without Phase Change Materials
, M.Sc. Thesis Sharif University of Technology ; Farhadi, Fathollah (Supervisor)
Abstract
Phase change materials have been of great interest due to their ability to save and restore energy in low temperature ranges. PCM can save and release energy in a constant temperature which leads to save in energy. These materials have been widely used in solar cells, storage tanks, human body and buildings. Applications of PCMs have been discussed in the last chapter of this thesis. To study the effect of PCM, a room with bricks, chalk, insulator and also PCM is assumed. Abovementioned room in summer and winter of Tehran with south-north and west-east walls has been simulated in COMSOL. Effects of air’s convection in the room and brick’s holes have been investigated in simulation and...
Integration of clustering analysis and reward/penalty mechanisms for regulating service reliability in distribution systems
, Article IET Generation, Transmission and Distribution ; Vol. 5, issue. 11 , 2011 , p. 1192-1200 ; ISSN: 17518687 ; Fotuhi-Firuzabad, M ; Billinton, R ; Sharif University of Technology
2011
Abstract
This study proposes an approach for improving service reliability in the distribution network based on establishing competition among electric distribution utilities. The idea behind this approach is to categorise the utilities and compare the performance of utilities located in one cluster with the other members of the same cluster. The reward/penalty mechanism (RPM) as a quality regulating instrument is designed for each cluster and used to penalise the utilities with a performance worse than the benchmark and to reward them for providing a performance better than the benchmark. Based on the RPM, utilities located in one cluster compete to make more profit by serving customers in better...
Integration of clustering analysis and reward/penalty mechanisms for regulating service reliability in distribution systems
, Article IET Generation, Transmission and Distribution ; Volume 5, Issue 11 , 2011 , Pages 1192-1200 ; 17518687 (ISSN) ; Fotuhi Firuzabad, M ; Billinton, R ; Sharif University of Technology
2011
Abstract
This study proposes an approach for improving service reliability in the distribution network based on establishing competition among electric distribution utilities. The idea behind this approach is to categorise the utilities and compare the performance of utilities located in one cluster with the other members of the same cluster. The reward/penalty mechanism (RPM) as a quality regulating instrument is designed for each cluster and used to penalise the utilities with a performance worse than the benchmark and to reward them for providing a performance better than the benchmark. Based on the RPM, utilities located in one cluster compete to make more profit by serving customers in better...
Short-term resilience-oriented enhancement in smart multiple residential energy system using local electrical storage system, demand side management and mobile generators
, Article Journal of Energy Storage ; Volume 52 , 2022 ; 2352152X (ISSN) ; Mohammadnezhad Shourkaei, H ; Fotuhi Firuzabad, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Recently, many investigations have been studied on the effects of the uncommon extreme events like hurricanes in electrical distribution grids. These events leads to damage to distribution grid equipments, and they are cause widespread blackouts. This paper presents short-term resilience enhancement of the residential sections against hurricane at day-ahead. The lines outage in the electrical distribution grid is implemented as stochastic modeling by hurricane. The resilience enhancement is done in the multiple energy systems such as integrated gas, heat and electrical. The three-stage multi-objective functions optimization is proposed for resilience-oriented enhancement. The proposed...
A bi-stage multi-objectives optimization of smart multi energy system with active consumers
, Article Sustainable Production and Consumption ; Volume 31 , 2022 , Pages 707-722 ; 23525509 (ISSN) ; Mohammadnezhad Shourkaei, H ; Fotuhi Firuzabad, M ; Sharif University of Technology
Elsevier B.V
2022
Abstract
The optimal energy consumption and production is one of main aims in the many countries to improve technical, economic and environmental issues by smart energy systems. This paper proposes a bi-stage multi-objectives optimization of the smart multi energy system with optimal coordination of active consumers than electrical and thermal prices in the day-ahead market. The optimization is implemented under uncertainty of demand and price for electrical and thermal energies. In the first stage, original electrical and thermal demand curves are optimized using demand shifting strategy based on energy prices. Then, optimized electrical and thermal demand curves are applied in the second stage for...
Design of Incentive Scheme for Reliability Improvement in Electricity Distribution Networks
, Ph.D. Dissertation Sharif University of Technology ; Fotuhi Firuzabad, Mahmoud (Supervisor)
Abstract
The regulation is necessary for the electric distribution networks as a natural monopoly. Regulators have been applied the Performance Based Regulation (PBR) for the control of price. The common model of PBR is price cap. Price cap creates sufficient incentive for cost efficiency. However, it decreases the service quality in distribution systems. The aim of this thesis is to design a comprehensive model for improvement of service reliability in the presence of PBR. An incentive model is developed using reward-penalty theory and yardstick theory. Reward-penalty theory is a financial approach that rewards the utility with good reliability and penalizes the utility with poor reliability. The...
Incorporating service quality regulation in distribution system maintenance strategy
, Article IEEE Transactions on Power Delivery ; Vol. 26, issue. 4 , 2011 , p. 2495-2504 ; ISSN: 08858977 ; Abiri-Jahromi, A ; Fotuhi-Firuzabad, M ; Sharif University of Technology
2011
Abstract
The concerns of regulatory authority for the cost efficiency and service quality of distribution utilities has led them to implement monetary schemes, such as penalty/reward mechanism (PRM). PRM provides explicit financial incentives for distribution system operators (DSO) to maintain or improve their efficiency and quality of service. Although the effectiveness of the PRM is proven, analytical tools that can handle the complex decision-making process faced by decision makers to respond to PRM are scarce. This paper presents an approach for distribution system maintenance management in the presence of the PRM. The proposed approach tailors the maintenance plans by taking into account the...
Impacts of service quality regulation on distribution automation investment
, Article 2011 10th International Conference on Environment and Electrical Engineering, EEEIC.EU 2011 - Conference Proceedings ; 2011 ; ISBN: 9781420000000 ; Fotuhi-Firuzabad, M ; Mohammadnezhad-Shourkaei, H ; Sharif University of Technology
2011
Abstract
This paper investigates the effects of service quality regulation on investing in distribution automation. Among different regulatory instruments for quality regulation, the Reward-Penalty Scheme (RPS) has been selected to evaluate the effect of monetary incentive on behavior of Electric Distribution Utility (EDU) for service reliability. By implementing different automation strategies, the value of enhancing reliability indices and consequently the value of rewards and penalties are calculated for each strategy. For achieving to more realistic outcome, ten years horizon is considered. Furthermore, in the calculation of reliability indices, the time varying failure rate of components is...
Impacts of service quality regulation on distribution automation investment
, Article 2010 IEEE International Energy Conference and Exhibition, EnergyCon 2010 ; 2010 , p. 373-378 ; ISBN: 9781420000000 ; Fotuhi-Firuzabad, M ; Mohammadnezhad-Shourkaei, H ; Sharif University of Technology
2010
Abstract
This paper investigates the effects of service quality regulation on investing in distribution automation. Among different regulatory instruments for quality regulation, the Reward-Penalty Scheme (RPS) has been selected to evaluate the effect of monetary incentive on behavior of Electric Distribution Utility (EDU) for service reliability. By implementing different automation strategies, the value of enhancing reliability indices and consequently the value of rewards and penalties are calculated for each strategy. For achieving to more realistic outcome, ten years horizon is considered. Furthermore, in the calculation of reliability indices, the time varying failure rate of components is...
Impacts of service quality regulation on distribution automation investment
, Article 2011 10th International Conference on Environment and Electrical Engineering, EEEIC.EU 2011 - Conference Proceedings, 8 May 2011 through 11 May 2011 ; May , 2011 , Page(s): 1 - 4 ; 9781424487820 (ISBN) ; Fotuhi Firuzabad, M ; Mohammadnezhad Shourkaei, H ; Sharif University of Technology
2011
Abstract
This paper investigates the effects of service quality regulation on investing in distribution automation. Among different regulatory instruments for quality regulation, the Reward-Penalty Scheme (RPS) has been selected to evaluate the effect of monetary incentive on behavior of Electric Distribution Utility (EDU) for service reliability. By implementing different automation strategies, the value of enhancing reliability indices and consequently the value of rewards and penalties are calculated for each strategy. For achieving to more realistic outcome, ten years horizon is considered. Furthermore, in the calculation of reliability indices, the time varying failure rate of components is...
Incorporating service quality regulation in distribution system maintenance strategy
, Article IEEE Transactions on Power Delivery ; Volume 26, Issue 4 , Oct , 2011 , Pages 2495-2504 ; 08858977 (ISSN) ; Abiri Jahromi, A ; Fotuhi Firuzabad, M ; Sharif University of Technology
2011
Abstract
The concerns of regulatory authority for the cost efficiency and service quality of distribution utilities has led them to implement monetary schemes, such as penalty/reward mechanism (PRM). PRM provides explicit financial incentives for distribution system operators (DSO) to maintain or improve their efficiency and quality of service. Although the effectiveness of the PRM is proven, analytical tools that can handle the complex decision-making process faced by decision makers to respond to PRM are scarce. This paper presents an approach for distribution system maintenance management in the presence of the PRM. The proposed approach tailors the maintenance plans by taking into account the...
Impacts of service quality regulation on distribution automation investment
, Article 2010 IEEE International Energy Conference and Exhibition, EnergyCon 2010, 18 December 2010 through 22 December 2010 ; December , 2010 , Pages 373-378 ; 9781424493807 (ISBN) ; Fotuhi Firuzabad, M ; Mohammadnezhad Shourkaei, H ; Sharif University of Technology
2010
Abstract
This paper investigates the effects of service quality regulation on investing in distribution automation. Among different regulatory instruments for quality regulation, the Reward-Penalty Scheme (RPS) has been selected to evaluate the effect of monetary incentive on behavior of Electric Distribution Utility (EDU) for service reliability. By implementing different automation strategies, the value of enhancing reliability indices and consequently the value of rewards and penalties are calculated for each strategy. For achieving to more realistic outcome, ten years horizon is considered. Furthermore, in the calculation of reliability indices, the time varying failure rate of components is...
A high-accuracy hybrid method for short-term wind power forecasting
, Article Energy ; Volume 238 , 2022 ; 03605442 (ISSN) ; Ehsan, M ; Soleymani, S ; Mohammadnezhad Shourkaei, H ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
In this article, a high-accuracy hybrid approach for short-term wind power forecasting is proposed using historical data of wind farm and Numerical Weather Prediction (NWP) data. The power forecasting is carried out in three stages: wind direction forecasting, wind speed forecasting, and wind power forecasting. In all three phases, the same hybrid method is used, and the only difference is in the input data set. The main steps of the proposed method are constituted of outlier detection, decomposition of time series using wavelet transform, effective feature selection and prediction of each time series decomposed using Multilayer Perceptron (MLP) neural network. The combination of automatic...
Study of droplet behaviour along a pulsed liquid-liquid extraction column in the presence of nanoparticles
, Article Canadian Journal of Chemical Engineering ; Volume 91, Issue 3 , 2013 , Pages 506-515 ; 00084034 (ISSN) ; Bahmanyar, A ; Molavi, H ; Bastani, D ; Mozdianfard, M. R ; Bahmanyar, H ; Sharif University of Technology
2013
Abstract
In this article, droplet size and its distribution along a pulsed liquid-liquid extraction column, is studied where SiO2 nanoparticles with concentrations of 0.01, 0.05 and 0.1vol.% and different hydrophobicities are applied to the dispersed phase. Using ultrasonication, nanoparticles were dispersed in kerosene as the base fluid. Nanofluids' stability was ensured using a UV-vis spectrophotometer. Some 22,000 droplets were measured by photographic technique and results were compared with systems containing no-nanoparticles (Water-Acetic acid-Kerosene). Addition of nanoparticles changed the droplet shape from ellipsoidal to spherical. Also, there was a marked influence on droplet breakage and...
Label-Free real-time detection of HBsAg using a QCM immunosensor
, Article Clinical Laboratory ; Volume 68, Issue 4 , 2022 , Pages 707-720 ; 14336510 (ISSN) ; Ghavidel, A ; Ahangari Cohan, R ; Hamidi Fard, M ; Khoobi, M ; Aghasadeghi, M ; Norouzian, D ; Sharif University of Technology
Verlag Klinisches Labor GmbH
2022
Abstract
Background: Hepatitis B virus surface antigen (HBsAg) is an important protein in both diagnosis and prevention of hepatitis B infection. In the current study, a piezoelectric immunosensor based on antibody-antigen interaction was designed to detect HBsAg. A quartz crystal microbalance system was employed to detect antibody-antigen interaction. Methods: At first, an oscillator was designed to measure the resonant frequency affected by the reactants using IC 74LVC1GX04. Antibody against HBsAg was immobilized on 10 MHz AT-cut quartz crystal. The surface modifications were monitored by atomic force microscopy (AFM) and contact angle measurements. Different concentrations of antibody were used...
MBBR and MBR Reactor Configuration for Better Performance
, M.Sc. Thesis Sharif University of Technology ; Borgheei, Mahdi (Supervisor)
Abstract
Membrane bioreactors (MBRs) which are commonly understood as the combination of membrane filtration and biological treatment using activated sludge have several advantages, but membrane fouling reduces the membrane efficiency, permeability and lifetime. An alternative is replacing a moving bed biofilm reactor (MBBR) with the activated sludge system which may reduce the effect of membrane fouling. The sludge produced in MBBRs has poor settling characteristics, therefore, their efficiency is limited by the sedimentation tank performance and they require a larger settling surface. The combination of moving bed biofilm reactors and membrane bioreactors can compensate for the drawbacks of both of...