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    Design and Operational Analysis of Superconducting Qubits

    , M.Sc. Thesis Sharif University of Technology Haji Hosseini Roknabadi, Saeed (Author) ; Fardmanesh, Mahdi (Supervisor)
    Abstract
    Quantum bits, also known as Qubits are the smallest building blocks of quantum computers, their correct operation has a great impact on quantum computing fidelity. For this purpose, Qubits need to have the necessary properties. Many properties have been defined for Josephson junction-based Qubits in order to implement better qubits. In this master thesis, the main characteristics of superconducting quantum bits including resonant frequency, anharmonicity factor, output readability signal, and quantum decoherence time including relaxation time and dephasing time have been calculated for cooper pair box topology in different operational regimes from cooper pair box regime to quantronium and... 

    Automation of Vision Measurement Machine to Develop Parts Profile Dimensional Measurement Algorithm based on Machine Vision and Image Processing Technique Algorithms

    , M.Sc. Thesis Sharif University of Technology Hosseini, Arian (Author) ; Khodaygan, Saeed (Supervisor)
    Abstract
    Automated dimensional inspection is commonly expensive because of the requirement for high-precision measurement devices. To perform a precision measurement, the technician must be highly skilled and fully understands the operation of the equipment. Moreover, automation of the mentioned process to reduce dimensional measurement time is a complicated task due to restrictions of precise equipment such as CMM. With the expansion of the use of cameras in the industry, the measurement method with the help of machine vision systems is one of the cost-effective methods that can be achieved with the development of a suitable image processing algorithm to achieve acceptable accuracy compared to... 

    Production of extracellular protease and determination of optimise condition by bacillus licheniformis BBRC 100053

    , Article Chemical Engineering Transactions ; Volume 21 , 2010 , Pages 1447-1452 ; 19749791 (ISSN) ; 9788895608051 (ISBN) Ghobadinejad, Z ; Yaghmaei, S ; Haji Hosseini, R ; Sharif University of Technology
    2010
    Abstract
    The production of protease by Bacillus licheniformis BBRC 100053 was studied. The most appropriate medium for the growth and protease production is composed of: lactose 1 %, yeast extract 0.5 %, peptone 0.5 %, KH 2PO4 0.1%, MgSO4.7H2O 0.02 %. Enzyme production corresponded with growth and reached a maximums level (589 U/ml) during the stationary phase at 35 °C, pH equivalent to 10 and with 150 rpm after 73 hours. Protease activity was highest at pH 8 and 45 °C. The best carbon sources are respectively lactose and maltose and the best nitrogen source is peptone The protease was highly active and stable from pH 7.0 to 11.0 with an optimum at pH 7-8.Thermo stability of the enzyme was considered... 

    Production of extracellular protease and determination of optimal condition by bacillus licheniformis BBRC 100053

    , Article International Journal of Engineering, Transactions B: Applications ; Volume 22, Issue 3 , 2009 , Pages 221-228 ; 1728-144X (ISSN) Ghobadi Nejad, Z ; Yaghmaei, S ; Haji Hosseini, R ; Sharif University of Technology
    Materials and Energy Research Center  2009
    Abstract
    The production of protease by Bacillus licheniformis BBRC 100053 was studied. The most appropriate medium for the growth and protease production is composed of: lactose 1%, yeast extract 0.5%, peptone 0.5%, KH2PO 4 0.1%, MgSO4.7H2O 0.02%. Enzyme production corresponded with growth and reached a maximums level (589 U/ml) during the stationary phase at 35°C, pH equivalent to 10 and with 150 rpm after 73 hours. Protease activity was highest at pH 8 and 45°C. The best carbon sources are respectively lactose and maltose and the best nitrogen source is peptone. The protease was highly active and stable from pH 7.0 to 11.0 with an optimum at pH 7-8.... 

    A Methology for Implementing ITIL V3 based on PMBOK

    , M.Sc. Thesis Sharif University of Technology Haji Hosseini, Hamid Reza (Author) ; Shadrokh, Shahram (Supervisor)
    Abstract
    PMBOK is a standard that is the subset of Project Management Knowledge and includes all areas. ITIL is a framework that allows IT organizations using best practices in IT Service Management. Both of them includes some process that during implementation and execution should act based on them. The goal of developing a methodology for implementing ITIL V3 based on PMBOK is executing a comparison mapping for connecting these two difference fields. IT managers know about ITIL implementation, but most of project managers are not familiar about it. If we guess that implementing ITIL V3 is a project, a project manager can do it based on PMBOK. With mapping these two fields, project managers are able... 

    Detecting Successful Releases in Mobile Apps

    , M.Sc. Thesis Sharif University of Technology Haji Hosseini, Mohammad Hadi (Author) ; Heydarnoori, Abbas (Supervisor)
    Abstract
    In the current digital era, the large number of mobile developers and android applications has led to intense competition. Users can easily access many android applications to meet their needs. This abundance of available software makes it difficult for developers to attract and retain users, as they can easily switch from one application to another. This switch can happen if the current application does not meet the user’s needs, has issues, or if a better alternative is available. Therefore, developers must focus on keeping their users satisfied. To ensure user satisfaction, developers need to address user needs effectively. This includes fixing reported issues, adding new features, and... 

    Preparation and Application of Carbon Nanotube-polypyrrole Modified Electrode in Electrochemical Determination of Mesalazine

    , M.Sc. Thesis Sharif University of Technology Hosseini Yazdeli, Pouya (Author) ; Shahrokhian, Saeed (Supervisor)
    Abstract
    In this work, the glassy carbon electrode (GCE) was modified with a thin layer of multi-walled carbon nanotubes (MWCNTs) and consequently, electrochemically deposited poly-pyrrole. The electrochemical behavior of mesalazine was studied on the surface of the modified electrode by applying linear sweep voltammetry (LSV). The electro-polymerization process and the electrochemical response toward mesalazine were investigated in the presence of different aromatic anion dopants including, benzenesulfonic acid (BSA), 1,3-benzenedisulfonic acid (1,3-BDSA), 1,5-naphthalenedisulfonic acid (1,5-NDSA) and new coccine (NC). By using 1,5-NDSA as dopant, a significant increase (∼418 times) was observed in... 

    Risk-based Framework for Optimal Calibration of Building Seismic Design Provisions through Minimization of Lifecycle Cost

    , Ph.D. Dissertation Sharif University of Technology Saeed Hosseini Varzandeh (Author) ; Mahsuli, Mojtaba (Supervisor)
    Abstract
    This dissertation proposes a probabilistic framework for optimal calibration of design provisions based on the minimization of lifecycle cost (LCC) and its uncertainty. Subsequently, this framework is utilized to determine the optimal robust design base shear coefficient of building structures, and propose a methodology for codifying it while preserving the current structure of the base shear equation. In the first part of the proposed methodology, various structures are designed with different seismic base shears. Then, at each site, their LCC comprising the construction costs and seismic losses is calculated. Various types of seismic loss considered in this study include the direct... 

    Introduction of Methods and Instructions for Life Extension and Recovery of Turbocharger Turbine wheel 900

    , M.Sc. Thesis Sharif University of Technology Mohammad Hosseini, Javad (Author) ; Adibnazari, Saeed (Supervisor)
    Abstract
    Turbochargers are industrial devices that widely are used in aviation, marine and automotive industry. Manufacturing cost and technology of their components vary according to their application fields. One of the most important components of these devices is turbine wheel, which needs to be solid, strong and have a high resistance in critical extraordinary conditions. In these days, it can be seen that superalloys are used remarkably in manufacturing of turbine wheels. When this part of turbine is damaged due to some different reasons, turbine wheel must be quit of circle Process according to repair instructions. In these conditions either turbine must be repaired or replaced by a new one;... 

    An optimized graph-based structure for single-cell RNA-seq cell-type classification based on non-linear dimension reduction

    , Article BMC Genomics ; Volume 24, Issue 1 , 2023 ; 14712164 (ISSN) Akbari Roknabadi, S ; Laghaee, S. P ; Koohi, S ; Sharif University of Technology
    BioMed Central Ltd  2023
    Abstract
    Background: It is now possible to analyze cellular heterogeneity at the single-cell level thanks to the rapid developments in single-cell sequencing technologies. The clustering of cells is a fundamental and common step in heterogeneity analysis. Even so, accurate cell clustering remains a challenge due to the high levels of noise, the high dimensions, and the high sparsity of data. Results: Here, we present SCEA, a clustering approach for scRNA-seq data. Using two consecutive units, an encoder based on MLP and a graph attention auto-encoder, to obtain cell embedding and gene embedding, SCEA can simultaneously achieve cell low-dimensional representation and clustering performing various... 

    Multiscale Finite Volume Method for Simulation of Compressible Multiphase Flow in Porous Media

    , M.Sc. Thesis Sharif University of Technology Hosseini, Sajad (Author) ; Jamshidi, Saeed (Supervisor) ; Masihi, Mohsen (Supervisor)
    Abstract
    Today, due to a massive increase in accuracy of reservoir characterization models, multiphase flow simulation on real permeability fields faces a serious challenge. Using multiscale methods in reservoir flow simulation of a heterogeneous environment has led to huge speed-up of the simulation. In multiscale methods, instead of replacing a heterogeneous medium by an equivalent homogeneous medium, used in upscaling, the problem is solved on the original resolution. In this thesis, multiscale finite volume method (MSFV) has been used to simulate flow and saturation behavior of a black oil model. Unlike the original multiscale finite volume methods that were unable to solve compressible fluid... 

    Dynamic Modeling of Mud Loss in Iranian Fields Using Novel Multiphysics Methods

    , M.Sc. Thesis Sharif University of Technology Hosseini, Ala (Author) ; Shad, Saeed (Supervisor) ; Zivar, Davood (Co-Supervisor)
    Abstract
    The mud loss and its impact on the formation play a vital role in the productivity of the formation and the near wellbore area. Despite the importance of the use of mud during the drilling process, one cannot overlook the issues that may be caused by losing mud into the formation. In addition to the formation damage caused by mud loss, the cost associated with such phenomenon and drilling operational issues and challenges has motivated the industry to look into different avenues to resolve the mud loss issue or reduce its impact. Evaluating the impact of such a phenomenon on these issues requires accurate modeling. In this study different models have been developed to evaluate the impact of... 

    A Dynamic Model for Cost Reduction in Mega Projects Via Interface Management in Case of Multiple Contractors

    , M.Sc. Thesis Sharif University of Technology Kereshyar, Ali (Author) ; Haji, Alireza (Supervisor) ; Mostafavi, Mostafa (Co-Supervisor) ; Hosseini, Hossein (Co-Supervisor)
    Abstract
    One of the main goals in large projects with multiple contractors is to reduce costs in various processes. The complexity of a large project, which is mainly due to the complexity of activities and the existence of interference between different phases and the lack of transparency of activities, can be added to the multiplicity of contractors and the difficulty of proper interface management.As regards that large projects with a large scope of work, have to use several contractors and this issue has a direct impact on increasing project costs, large project management becomes a major challenge that the application of appropriate knowledge, improving processes and skills and tools can play a... 

    Elastic Properties of Wet Granular Material

    , M.Sc. Thesis Sharif University of Technology Shabannia Roknabadi, Mohammad Reza (Author) ; Rouhani, Shahin (Supervisor)
    Abstract
    To explain the dependence of sliding friction on or between the layers of wet sand, one first needs to have a rather good understanding of the elastic properties of wet granular material. Experimental work that has been done on the subject so far, has shown that these elastic properties have a peculiar dependence on the water volume fraction of the sand system. But till nowno theoretical model has been presented that could illustrate the physical causes of such findings. More specifically, these handful of theoretical models have not been able to explain the complex relationship between the shear modulus of sand and the water volume percentage. In this thesis at first the nature and... 

    Optimal Batch Production for a Single Machine System with Rework

    , M.Sc. Thesis Sharif University of Technology Haji, Babak (Author) ; Haji, Ali Reza (Supervisor)
    Abstract
    This research attempts to develop the optimal solution for an inventory problem consisting of a single machine which produces items some of which may be defective. We assume that no shortages are allowed and all defective items are to be reworked. Setup cost for rework and waiting time of defectives are considered. This research consists of two different parts. In the first part we consider two different policies where in the first policy in each cycle after the regular production the machine is setup for the rework of defectives of the same cycle. In the second policy several cycles constitute a period. All the defectives produced in the period are reworked in the last cycle of that period.... 

    Experimental and Simulation Study of Barite Settlement Phenomenon under Static and Dynamic Condition

    , M.Sc. Thesis Sharif University of Technology Movahhedi, Hamed (Author) ; Shad, Saeed (Supervisor) ; Hosseini Mokhtari, Zahra (Co-Advisor)
    Abstract
    In petroleum related drilling, Barite particles settling and Barite sag as major problems in drilling wells can potentially impose significant operational issues. In this study, a computational fluid dynamics (CFD) and experimental investigation of Barite settlement in annular space were conducted in both static and dynamic conditions. The Euler-Euler approach was used to model the multiphase flow of solid Barite particles and drilling fluid. In this approach, the momentum lost between phases has been taken into account by means of particle-particle and particle-fluid exchange coefficients. The governing equations were numerically solved using finite volume method by CFD software package... 

    Modeling of Nano-Aerosol Deposition in Human Lung in Successive Respiratory Cycles

    , M.Sc. Thesis Sharif University of Technology Nemati, Hossein (Author) ; Saeedi, Mohammad Saeed (Supervisor) ; Hosseini, Vahid (Co-Advisor)
    Abstract
    Particulates are a group of air pollutants. They can enter the respiratory system by breathing and cause adverse effects on its performance. Also, inhaled drugs, recently have found many applications in the field of drug delivery. Prediction of particle deposition in the lungs during breathing, can provide useful information on the effects of deposited particles on the respiratory system. When a person is exposed to breathable particulates, after a while with completion of a few respiratory cycles, particle deposition rate, reaches a certain amount at the quasi-steady state. A lot of researchers have investigated particle deposition in the lung, but all of them have studied a single... 

    Numerical Modeling of Fluid Flow and Proppant Transport in Hydraulic Fracture Using Extended Finite Element Method

    , Ph.D. Dissertation Sharif University of Technology Hosseini, Navid (Author) ; Khoei, Amir Reza (Supervisor) ; Shad, Saeed (Co-Supervisor)
    Abstract
    Transport phenomena in porous media play important role in many areas of subsurface hydrology, geo-physics, environment, energy and petroleum. The work in the field of numerical modeling of fractured porous media is yet an open area of research. The classic finite element method (FEM) has some limitations in modeling of discontinuities like fracture. FEM mesh should conform with the geometry of the fracture. Presence of fracture imposes discontinuity in pressure field of fluid phases and displacement field of solid phase (rock). To represent the fractures, the extended finite element method (X-FEM) can be used in which the standard finite element approximation of the field variables is... 

    Optimal batch production with rework and non-zero setup cost for rework

    , Article 2009 International Conference on Computers and Industrial Engineering, 6 July 2009 through 9 July 2009 ; 2009 , Pages 857-862 ; 9781424441365 (ISBN) Haji, B ; Haji, R ; Haji, A ; Sharif University of Technology
    2009
    Abstract
    This paper attempts to develop the optimal solution for an inventoryproblem consisting of a single machine which produces items some of which may bedefective. We assume that no shortages are allowed and all defective items areto be reworked. Setup cost for rework and waiting time of defectives areconsidered. We consider two different policies where in the first policy in eachcycle after the regular production the machine is setup for the rework ofdefectives of the same cycle. In the second policy several cycles constitute aperiod. All the defectives produced in the period are reworked in the last cycleof that period. At the end of the rework cycle the whole process starts allover again. One... 

    One-for-one period policy in a two-echelon inventory system with commoncycle and poisson demand rate for retailers

    , Article 2009 International Conference on Computers and Industrial Engineering, CIE 2009 ; 2009 , Pages 831-834 ; 9781424441365 (ISBN) Haji, R ; Tayebi, H ; Haji, B ; Sharif University of Technology
    2009
    Abstract
    This paper deals with a two-echelon inventory system consisting of onesupplier and N retailers. Each retailer faces an independent Poisson demand withthe same rate and applies a new ordering policy called one-for-one- periodordering policy for its inventory control. In this ordering policy the ordersize is equal to one and the time interval between any two consecutive ordersforms a common fixed cycle. Thus, the supplier faces a deterministic demand andadopts a deterministic inventory policy. At each cycle he orders a batch of sizeN to his own supplier. Upon receipt of each batch he sends 1 unit of theproduct to each retailer with a transportation cost. In this paper, for theabove system we...