Driving Behavior Recognition by Multimodal Data

, Ph.D. Dissertation Sharif University of Technology Khosravi, Ehsan (Author) ; Hemmatyar, Ali Mohammad Afshin (Supervisor) ; Jafari Siavoshani, Mehdi (Supervisor) ; Moshiri, Behzad (Co-Supervisor)

Abstract

Examining and improving driving behavior leads to a reduction in road accidents. Driver behavior is generally divided into two categories: aggressive and safe. Driving culture can be enhanced by identifying aggressive behavior and informing drivers directly. This information is used to assign safe drivers to the missions of transport fleet management companies and organizations. Also, this information is used by insurance companies or traffic police to apply discounts or fines. In any case, the detection and notification of aggressive behaviors would reduce accidents and improve the lives and mental safety of passengers and drivers. The detection of driving events is an introduction to the...

Online Dose Monitoring in Proton Therapy using Positron Emission Tomography

, M.Sc. Thesis Sharif University of Technology Moshiri, Shirin (Author) ; Hosseini, Abolfazl (Supervisor)

Abstract

Proton therapy is an advanced method of cancer treatment that has the ability to provide better protons than other radiation therapy methods. Even though the charged particles have superior characteristics and their biological properties are more than the deviations in treatment design. In order to check the uncertainties in hadron therapy and reduce the side risks, there is a need for methods to monitor the range during radiation therapy. Considering that the charged particles are in the tissue, the monitoring method should be able to collect the secondary particles produced during the interaction of the primary beam with the tissue. Currently, positron emission tomography (PET) is the only...

Simulation of multi-component multi-phase fluid flow in two-dimensional anisotropic heterogeneous porous media using high-order control volume distributed methods

, Article Computers and Mathematics with Applications ; Volume 78, Issue 10 , 2019 , Pages 3303-3328 ; 08981221 (ISSN) Moshiri, M ; Taghizadeh Manzari, M ; Sharif University of Technology

Elsevier Ltd 2019

Abstract

In this paper, flow of multi-component two-phase fluids in highly heterogeneous anisotropic two-dimensional porous media is studied using computational methods suitable for unstructured triangular and/or quadrilateral grids. The physical model accounts for miscibility and compressibility of fluids while gravity and capillary effects are neglected. The governing equations consist of a pressure equation together with a system of mass conservation equations. For solving pressure equation, a new method called Control Volume Distributed Finite Element Method (CVDFEM) is introduced which uses Control Volume Distributed (CVD) vertex-centered grids. It is shown that the proposed method is able to...

A comparative study of explicit high-resolution schemes for compositional simulations

, Article International Journal of Numerical Methods for Heat and Fluid Flow ; Volume 29, Issue 1 , 2019 , Pages 94-131 ; 09615539 (ISSN) Moshiri, M ; Taghizadeh Manzari, M ; Sharif University of Technology

Emerald Group Publishing Ltd 2019

Abstract

Purpose: This paper aims to numerically study the compositional flow of two- and three-phase fluids in one-dimensional porous media and to make a comparison between several upwind and central numerical schemes. Design/methodology/approach: Implicit pressure explicit composition (IMPEC) procedure is used for discretization of governing equations. The pressure equation is solved implicitly, whereas the mass conservation equations are solved explicitly using different upwind (UPW) and central (CEN) numerical schemes. These include classical upwind (UPW-CLS), flux-based decomposition upwind (UPW-FLX), variable-based decomposition upwind (UPW-VAR), Roe’s upwind (UPW-ROE), local Lax–Friedrichs...

Design and Manufacturing a Wearable Measuring System for Trunk Movements

, M.Sc. Thesis Sharif University of Technology Mokhlespour Esfahani, Mohammad Iman (Author) ; Parnianpour, Mohamad (Supervisor) ; Narimani, Roya (Supervisor) ; Moshiri, Behzad (Co-Advisor) ; Hoviattalab, Maryam (Co-Advisor)

Abstract

Measurement of human movement during work, sport as daily activities has important effects for rehabilitation and biomechanics experts.
Recently, several researches are concentrated on this technology significantly because of new progress in sensors and fusion sensors. In the near future, wearable and ambulatory devices will be used considerably in biomedical applications. In this study, we reviewed some methods about wearable measuring system then introduced and designed innovative wearable clothing for this purpose. Some specifications and advantages of our system in comparison with relevant researches are; using textile sensors that are manufactured through nano electro active polymer...

OPC UA over TSN (Time Sensitive Network) for vertical and machine to machine communication

, Article 2023 9th International Conference on Control, Instrumentation and Automation, ICCIA 2023 ; 2023 ; 979-835036601-3 (ISBN) Moshiri, A ; Hemmatyar, A. M. A ; Sharif University of Technology

Institute of Electrical and Electronics Engineers Inc 2023

Abstract

This report introduces OPC UA (Open Platform Communication- Unified Architecture) over TSN (Time Sensitive Network), a transformative technology for Industry 4.0. Combining OPC UA's vendor-independent and secure data exchange capabilities with the precision and determinism of TSN, OPC UA TSN is poised to revolutionize industrial communication. It enables horizontal and vertical data exchange in smart factories, offering a robust solution for control-level communication. The report discusses its architectural foundations, key technologies, and practical implementations. By seamlessly integrating with existing industrial systems, OPC UA over TSN is set to meet the evolving requirements of...

Early Detection of DDOS Attacks in SDX (SDN-IXP) Networks

, M.Sc. Thesis Sharif University of Technology Moshiri, Mahdi (Author) ; Jahangir, Amir Hossein (Supervisor)

Abstract

A novel internetworking paradigm, software-defined exchange (SDX), allows multiple independent administrative domains to share computing, storage, and networking resources. Although the term SDX is very recent, the concept has already been used by many distinct disciplines.We argue that the advent of Software Defined Networking (SDN) provides a unique opportunity to effectively detect and contain network security problems such as DDoS attacks. DDoS attacks can easily exhaust the controller's or the switches' computing and communication resources and hence, breakdown the network within a short time. In this thesis we extend these functionalities with an efficient, scalable and light weight...

Simulation of Flow in Anisotropic Heterogeneous Oil Reservoirs Using Compositional Model and Cell-Based Unstructured Grid

, Ph.D. Dissertation Sharif University of Technology Moshiri, Mojtaba (Author) ; Taghizadeh Manzari, Mehrdad (Supervisor)

Abstract

Reservoir simulation is a useful tool for efficient reservoir management and protective exploitation of non-renewable hydrocarbon resources as the main supplier of development programs in the country. Due to the nature of underground hydrocarbon reservoirs, the simulation faces several challenges, both in rock and fluid parts. These challenges should be overcome in order to provide reliable results from simulations. One of the major challenges pertaining to rock, is large discontinuous variations accompanied by anisotropy of rock permeability fields which causes numerous problems when governing equations are solved numerically. A viable numerical procedure shall account for complex reservoir...

Energy Management in Smart Manufacturing Based on AI Methods

, M.Sc. Thesis Sharif University of Technology Moshiri, Abdollah (Author) ; Hemmatyar, Ali Mohammad Afshin (Supervisor)

Abstract

Focusing on developing the EEPS (Energy Electric and Power System) based on the SG (Smart Grid) infrastructure to achieve implementation of EI (Energy Internet) ultimately, in order to analyze and manage the energy/power consumption, requires a robust embedded EMS (Energy Management System) to implement real-time LF (Load Forecasting), prevent the power waste and realize consumption management which eventually leads toward the smart industries/buildings. STLF (Short Term Load Forecasting) is an essential component that an industrial plant requires to manage the power, regarding the load fluctuations during production, and compulsory requirement of cost mitigation. This thesis, in order to...

Simulation of multiphase flows in porous media with gravitational effects using dominant wave method

, Article International Journal of Numerical Methods for Heat and Fluid Flow ; Volume 23, Issue 7 , 2013 , Pages 1204-1224 ; 09615539 (ISSN) Moshiri, M ; Manzari, M. T ; Hannani, S. K ; Rasouli, A ; Sharif University of Technology

2013

Abstract

Purpose - In this paper, the flow of multiphase fluids in a one-dimensional homogeneous porous media involving the gravity effects is numerically studied using the dominant wave method. The paper aims to discuss these issues. Design/methodology/approach - The numerical scheme used for solving the pressure equations, obtained for the black-oil model, is a backward Euler scheme while the hyperbolic mass conservation equations, derived for both black-oil and Buckley-Leverett models, are solved using the dominant wave method. Higher-order schemes are achieved using either variable derivatives along with the minmod limiter or a MUSCL type interface construction scheme using the Fromm's limiter....

An investigation on the effect of cement and silica fume on properties of self-compacting concrete

, Article Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013 ; September , 2013 Moshiri, F ; Atashnama, A ; Panahi, M ; Gharebaghi, R ; Mahlouji, J ; Sharif University of Technology

Hokkaido University collection of Scholarly Academic Papers, HUSCAP 2013

Abstract

Self-Compacting concrete (SCC) is identified as a high performance concrete with the ability of self compaction, using its own weight without any external vibration. SCC is able to fill congested area and voids, even in highly reinforced concrete members whilst it flows without segregation. The fresh properties of SCC such as workability can be determined using different tests including slump-flow, J ring, V-funnel, U box, L box, GTM and column technique. In this paper the effect of different amount of cementitious material, silica fume and W/C ratios on workability and compressive strength of SCC are investigated. The results indicate that the workability of mixtures is reduced by...

Nerve retraction during inferior alveolar nerve repositioning procedure: A new simple method and review of the literature

, Article Journal of Oral Implantology ; Volume 41 , Dec , 2015 , Pages 391-394 ; 01606972 (ISSN) Hassani, A ; Saadat, S ; Moshiri, R ; Shahmirzad, S ; Hassani, A ; Sharif University of Technology

Allen Press Inc 2015

Abstract

Nerve repositioning surgery is one of the treatments chosen for the patients with edentulous posterior atrophic mandible. Like any other treatments, this therapy has its advantages and disadvantages, indications and contraindications. The most important complication of this procedure is neurosensory disturbance. This problem may occur at different stages of the treatment. One common time when nerve damage happens is when the nerve is located outside the canal and drilling and insertion of the implant are performed. Accordingly, this report describes a simple and feasible method to retract and protect nerves outside the canal during the treatment of nerve transposition. This will reduce the...

Nerve retraction during inferior alveolar nerve repositioning procedure: a new simple method and review of the literature

, Article The Journal of oral implantology ; Volume 41 , 2015 , Pages 391-394 ; 01606972 (ISSN) Hassani, A ; Saadat, S ; Moshiri, R ; Shahmirzad, S ; Hassani, A ; Sharif University of Technology

2015

Abstract

Nerve repositioning surgery is one of the treatments chosen for the patients with edentulous posterior atrophic mandible. Like any other treatments, this therapy has its advantages and disadvantages, indications and contraindications. The most important complication of this procedure is neurosensory disturbance. This problem may occur at different stages of the treatment. One common time when nerve damage happens is when the nerve is located outside the canal and drilling and insertion of the implant are performed. Accordingly, this report describes a simple and feasible method to retract and protect nerves outside the canal during the treatment of nerve transposition. This will reduce the...

Recursive spectral analysis of natural time series based on eigenvector matrix perturbation for online applications

, Article IET Signal Processing ; Volume 5, Issue 6 , 2011 , Pages 515-526 ; 17519675 (ISSN) Mirmomeni, M ; Lucas, C ; Araabi, B. N ; Moshiri, B ; Bidar, M. R ; Sharif University of Technology

2011

Abstract

Singular spectrum analysis (SSA) is a well-studied approach in signal processing. SSA has originally been designed to extract information from short noisy chaotic time series and to enhance the signal-to-noise ratio. SSA is good for offline applications; however, many applications, such as modelling, analysis, and prediction of time-varying and non-stationary time series, demand for online analysis. This study introduces a recursive algorithm called recursive SSA as a modification to regular SSA for dynamic and online applications. The proposed method is based on eigenvector matrix perturbation approach. After recursively calculating the covariance matrix of the trajectory matrix, R-SSA...

Online Multi-step Ahead Prediction of Time-Varying Solar and Geomagnetic Activity Indices via Adaptive Neurofuzzy Modeling and Recursive Spectral Analysis

, Article Solar Physics ; Volume 272, Issue 1 , 2011 , Pages 189-213 ; 00380938 (ISSN) Mirmomeni, M ; Lucas, C ; Araabi, B. N ; Moshiri, B ; Bidar, M. R ; Sharif University of Technology

2011

Abstract

The time-varying Sun as the main source of space weather affects the Earth's magnetosphere by emitting hot magnetized plasma in the form of solar wind into interplanetary space. Solar and geomagnetic activity indices and their chaotic characteristics vary abruptly during solar and geomagnetic storms. This variation depicts the difficulties in modeling and long-term prediction of solar and geomagnetic storms. On the other hand, the combination of neurofuzzy models and spectral analysis has been a subject of interest due to their many practical applications in modeling and predicting complex phenomena. However, these approaches should be trained by algorithms that need to be carried out by an...

Development and validation of an optimal GATE model for pencil beam scanning (pbs) proton beam delivery

, Article 2023 30th National and 8th International Iranian Conference on Biomedical Engineering, ICBME 2023 ; 2023 , Pages 471-474 ; 979-835035973-2 (ISBN) Asadi, A ; Varnaseri, S ; Moshiri, S ; Akhavanallaf, A ; Arabi, H ; Zaidi, H ; Sharif University of Technology

Institute of Electrical and Electronics Engineers Inc 2023

Abstract

We conducted a study to explore the potential utility of the GATE Monte Carlo (MC) code as an independent tool for dose calculation. We established a unified framework for dose calculation in pencil beam scanning (PBS) proton therapy (PT). Using GATE, we modeled the SIEMENS IONTRIS active scanned-based PT system. To verify the model, we compared depth dose profiles obtained from the MC simulation with experimental date. Additionally, we utilized the TG-119 clinical test case from AAPM to assess the accuracy of treatment planning and delivery using proton beams. The results of the MC simulation demonstrated strong agreement with measurements, revealing a 2.3% in mean point-To-point, maximum...

A new method for detection of rolling bearing faults based on the Local Curve Roughness approach

, Article Polish Maritime Research ; Volume 18, Issue 2 , July , 2011 , Pages 44-50 ; 12332585 (ISSN) Behzad, M ; Bastami, A ; Sharif University of Technology

2011

Abstract

Detection of rolling bearing faults by vibration analysis is an important part of condition monitoring programs. In this paper a new method for detection of bearing defects based on a new concept of local surface roughness, is proposed. When a defect in the bearing grows then roughness of the defective surface increases and measurement of the roughness can be a good indicator of the bearing defect. In this paper a method of indirectly measuring surface roughness by using vibration signal is introduced. Several attached examples including both numerically simulated signals and actual experimental data show the effectiveness of the new, easy-to-implement method

Numerical and experimental investigation of the vibration of rotors with loose discs

, Article Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science ; Volume 224, Issue 1 , 2010 , Pages 85-94 ; 09544062 (ISSN) Behzad, M ; Asayesh, M ; Sharif University of Technology

2010

Abstract

In this study, the energy method has been used to develop a finite-element code for studying the effects of loose rotating discs on the rotor-bearing systems' response. A mathematical model of the loose disc has resulted in terms similar to unbalance and gyroscopic effects in the equation of motion of the system. Results of this study show that rotor response and beating phenomena are a function of measurement location, loose disc mass and inertia, ratio of rotating speed to the speed of loose disc, and clearance between the loose disc and shaft considering constant speed for loose disc and shaft. The developed finite-element model can numerically give the response of rotors with any number...

Friction-induced backward rub of rotors in non-annular clearances: Experimental observations and numerical analysis

, Article Tribology International ; Volume 152 , 2020 Behzad, M ; Alvandi, M ; Sharif University of Technology

Elsevier Ltd 2020

Abstract

During backward rub in a turbomachine, rotor is compelled by frictional forces into a severe precessional sliding motion inside stationary parts such as seals or journal bearings in opposite direction of rotor's rotation. Backward rub occurs with high frequency and high amplitude of vibration and can deteriorates rubbing surfaces just for few moments. This paper presents and investigates the idea of clearance profile alteration from annular form to non-annular 3-lobed form in order to affect the reverse rub's characteristics. For this purpose, a test setup consisting of a lightly damped rotor-stator system is designed and built in SUT's condition-monitoring laboratory for testing the...

Unbalance-induced rub between rotor and compliant-segmented stator

, Article Journal of Sound and Vibration ; Volume 429 , 2018 , Pages 96-129 ; 0022460X (ISSN) Behzad, M ; Alvandi, M ; Sharif University of Technology

Academic Press 2018

Abstract

Today, turbomachinery designers are trying to attain zero clearances for optimizing performance and efficiency of machine by designing advanced compliant-segmented seals. This trend involves secondary issues such as rotor-to-stator contact interaction which is to be treated with more technical knowledge in rotordynamic design and condition monitoring programs. The aim of this paper is to gain insight into dynamic interaction between a flexible rotor and a set of compliant arc-shaped segments as stator system. Specifically, the unbalanced-induced forward rubbing response is investigated in tight clearance condition during resonance-passing situations. A Jeffcott rotor modeling is used for...