Rigidity and Wide Scope

, M.Sc. Thesis Sharif University of Technology Ghalbi, Faraz (Author) ; Mousavian, Nasrollah (Supervisor)

Abstract

In this dissertation, we are considering the following question: can the Rigidity Thesis (RT) be reduced to the Wide Scope Thesis (WT). According to the RT, proper names of natural language are rigid designators and most of the definite descriptions of natural language are not rigid designators. Thus, the Descriptive Theory of Proper Names (DTPN), according to which the semantic content of a proper name is a (set of) definite description(s), is false. According to WT, the semantic content of a sentence containing a proper name is given by a (set of) definite description(s) with wide scope (over intensional operators, modal operators included). Such a semantic content can explain the...

Avicenna on the primary propositions

, Article History and Philosophy of Logic ; Volume 39, Issue 3 , 2018 , Pages 201-231 ; 01445340 (ISSN) Mousavian, S. N ; Ardeshir, M ; Sharif University of Technology

Taylor and Francis Ltd 2018

Abstract

Avicenna introduces the primary propositions (or the primaries, for short) as the most fundamental principles of knowledge. (In this paper, we are not primarily concerned with the primary/first intelligibles as concepts/conceptions.) However, as far as we are aware, Avicenna’s primaries have not yet been independently studied. Nor do Avicenna scholars agree on how to characterize them in the language of contemporary philosophy. It is well-known that the primaries are indemonstrable; nonetheless, it is not clear what the genealogy of the primaries is (§2), how, epistemologically speaking, they can be distinguished from other principles (§3), what their phenomenology is (§4), what the cause of...

Empty Names

, M.Sc. Thesis Sharif University of Technology Bagheri Esfe, Mohamad (Author) ; Mousavian, Nasrollah (Supervisor)

Abstract

The direct reference theory about proper names considers the references of proper names as their contents. This view is persuasive for many philosophers. However, it encounter with some difficulties. Some of these difficulties are related to nonrefering names, called empty names sometimes. If natural language contains such names, the direct refernce theory shall propose some solutions to solve mistakes raised by them. In this project, in chapter one, I will assess the direct reference theory. In chapter two, I will argue that at least some names from natural language are empty. And finally, in chapter three and four, I will put forward some ways to take out of difficulties raised by empty...

Design and Implementation of a Solar Charger with Maxim Power Point Tracking Ability

, M.Sc. Thesis Sharif University of Technology Mousavian, Hossein (Author) ; Zolghadri, Mohammad Reza (Supervisor)

Abstract

In regard to the benefits of solar energy such as endlessness and pureness, design and implementation of a convertor for absorbing energy from solar cells is of interest. Thus, a suitable convertor with acceptable efficiency is designed to charge the batteries. In order to increase the efficiency and to decrease the electromagnetic interference, a novel method is proposed for soft switching. Due to the nonlinear behavior of solar cells and also variations of their input energy with respect to the change of solar emission and temperature, two controllers - one for maximum power point tracking from solar cells and the other to appropriately charge the 48-volt batteries - are designed....

Noninvasive fetal ECG extraction using doubly constrained block-term decomposition

, Article Mathematical Biosciences and Engineering ; Volume 17, Issue 1 , 2020 , Pages 144-159 Mousavian, I ; Shamsollahi, M. B ; Fatemizadeh, E ; Sharif University of Technology

American Institute of Mathematical Sciences 2020

Abstract

Fetal electrocardiogram (fECG) monitoring is a beneficial method for assessing fetal health and diagnosing the fetal cardiac condition during pregnancy. In this study, an algorithm is proposed to extract fECG from maternal abdominal signals based on doubly constrained block-term (DoCoBT) tensor decomposition. This tensor decomposition method is constrained by quasi-periodicity constraints of fetal and maternal ECG signals. Tensor decompositions are more powerful tools than matrix decomposition, due to employing more information for source separation. Tensorizing abdominal signals and using periodicity constraints of fetal and maternal ECG, appropriately separates subspaces of the mother, the...

Evaluation of natural circulation phenomena in WWER-1000 geometry

, Article 2nd International Congress on Advances in Nuclear Power Plants, ICAPP 2003, Cordoba, 4 May 2003 through 7 May 2003 ; 2003 Mousavian, S. K ; D'Auria, F ; Salehi, M ; Sharif University of Technology

American Nuclear Society 2003

Abstract

Using of natural circulation concepts in nuclear and non-nuclear industry is very important. One of important methods in new designs of "innovative" fission reactor technologies is natural circulation scene. Natural circulation is based on buoyancy force; density differences between hot and cold legs including core and steam generators, and height of hot and cold zones. In this paper we studied natural circulation phenomena in two different heights of hot and cold zones by using of RELAP5 system code. Natural circulation Flow Map (NCFM) made for both cases and compared with experimental data. We have considered main components and systems of WWER-1000 plant in our model, such as pressure...

Analysis of natural circulation phenomena in VVER-1000

, Article Nuclear Engineering and Design ; Volume 229, Issue 1 , 2004 , Pages 25-46 ; 00295493 (ISSN) Mousavian, S. K ; D'Auria, F ; Salehi, M. A ; Sharif University of Technology

2004

Abstract

In all light water reactors (LWR), natural circulation is an important passive heat removal mechanism. In the present paper, the natural circulation phenomena are studied with reference to step-wise coolant inventory reduction and a small break loss-of-coolant-accident (SBLOCA) in the cold leg of VVER-1000. The natural circulation flow map (NCFM) approach is considered to evaluate the natural circulation performance of the VVER-1000 NPP also comparing VVER-1000 and PWR systems. Three different elevations between heat source (core) and heat sink (steam generators) zones have been considered in order to characterize the buoyancy force in a VVER-1000. The influence of power and the cold legs...

Modelling and Simulation of Heat Transfer in the Moicrowave Sintering Process of Uranium Dioxide

, M.Sc. Thesis Sharif University of Technology Ahmadi, Mustafa (Author) ; Outokesh, Mohammad (Supervisor) ; Mousavian, Khalil (Supervisor)

Abstract

One of the steps in the production of nuclear fuel pellets used in the core of a nuclear reactor is sintering. Sintering means the consolidation of a pressed powder sample into an integrated solid. This process can be done in different ways, such as traditional sintering, microwave, spark plasma, etc. In the process of fabrication of nuclear fuel pellets, after producing uranium dioxide in powder form and making corrections on the size distribution of powder grains, it would be nolded and then sintered. In this research, the temperature evolution of the green pellets introduced to microwave heating were investigated. In this report, a brief overview of the principles of microwave heating is...

Designing a Vehicle Counting and Classification System

, M.Sc. Thesis Sharif University of Technology Mousavi, Zeinab (Author) ; Gholampour, Iman (Supervisor)

Abstract

In recent years, Intelligent Transportation Systems (ITS) have received special attentions both in research and in commercial areas. Increased infrastructure facilities, like surveillance cameras, has made this concept even more attainable than before. In this respect, the ability to automatically extract information from traffic images, as one of the key inputs of ITSs, is of great importance. With an increased number of surveillance cameras and the need for more accurate information regarding the road users and their interactions, in order to better city traffic management, building and repairing roads, trip time estimation, number of people per roads estimation and etc, using human...

Economic Model Predictive Control with Time Varying Constraints

, M.Sc. Thesis Sharif University of Technology Iman, Sara (Author) ; Haeri, Mohammad (Supervisor)

Abstract

In today's world we are dealing with many devices and processes with the goal of efficiency and performance improvement. In many processes particularly chemical ones, the goal is to control the output according to its constraints in the way that the performance is economically efficient, such as reducing energy consumption and energy loss and increasing efficiency. In order to control a process with economical goals, an economical cost function is used and after determination of optimal values a controller is used to guide the process so can achieve them. Model predictive control (MPC) is very common in this economic control Due to advantages such as considering the problem constraints. In...

Blind Universal Steganalysis in Multiple Actor Paradigms and its Relation to Pixel-Cost

, M.Sc. Thesis Sharif University of Technology Akhondi, Ali (Author) ; Gholampour, Iman (Supervisor)

Abstract

Steganography is method for communicating confidential information through a non-trustworth in way which hides the existence of communication. For improving the security of steganography statistical detectability must decrease as such as possible. Despite the fact, that the quality of the relation between statistical detectability and amount of distortion engendered by embedding is still an open problem, problem of detectability reduces to problem of management of pixel embedding in order to minimization of distortion. As in wet paper coding methods, an optimum (or approximately optimum) algorithm proportioned to Pixel-cost has been offered, the current problem of steganography is to find...

Embedded Camera Design for Machine Vision Traffic Aplication

, M.Sc. Thesis Sharif University of Technology Dowlatzadeh, Shayan (Author) ; Gholampour, Iman (Supervisor)

Abstract

With the advent of technology, small in size sensors, memory, speeding up the processor and lowering the cost, it is possible to build an embedded camera system. The goal of this project is to design and build an embedded camera system so it can execute any set of necessary algorithms as depending on the application. In this project, two models of embedded camera systems have been presented as an integrated system and a system with independent units. To design the integrated embedded system, ZYNQ processor is used and two structures are presented in the form of hardware-software and hardware design. In hardware-software design, image processing operations are done by software and in hardware...

Activity Analysis Based on Mobile Sensors

, M.Sc. Thesis Sharif University of Technology Bagheri, Vahid (Author) ; Gholampour, Iman (Supervisor)

Abstract

Smartphone sensors like accelerometer, gyroscope and magnetometer are very common nowadays. This gives us the opportunity for sensor-based activity recognition. This thesis's goal is to collect data from different smartphone sensors and then extract hand-crafted features and classify them using machine learning algorithms. Metro, bus, taxi, bicycle, running, upstairs, walking and standing are studied activities in this thesis. All above steps are covered in this research, later we want to present an activity recognition model and then test it through a web server, after that, we modify the model by proposing to change learning coefficient to gain better accuracy. Finally, an Android app was...

Design and Development of Indoor Tracking and Navigation IoT Systems

, M.Sc. Thesis Sharif University of Technology Roohi, Shahryar (Author) ; Gholampour, Iman (Supervisor)

Abstract

Current Global Positioning Systems (GPS) are unreliable for indoor positioning, leading to an increased demand for indoor navigation and tracking services. This research utilizes wireless technologies such as Bluetooth and Wi-Fi to provide these services by installing devices in the environment that connect to objects or individuals. To ensure the system's practicality, attention must be given to hardware optimization, cost reduction, and easy installation. The system should be applicable in large indoor environments such as hospitals and buildings, assisting with navigation. Key challenges include positioning accuracy, implementation costs, and energy consumption. This thesis presents...

Investigating How Network Effect, Affect the Success of Platform Complements in the Video Game Industry

, M.Sc. Thesis Sharif University of Technology Jadidzadeh, Elahe (Author) ; Miremadi, Iman (Supervisor)

Abstract

This research examines the impact of indirect network effects in platforms on the likelihood of success for platform complements. The main question addressed by this study is: How does a larger number of complements in a platform ecosystem, through access to diverse resources and knowledge, influence the enhancement of innovation and the likelihood of success for platform complements? While the expansion of indirect networks creates more opportunities for innovation and access to resources on one hand, it may also lead to negative effects such as increased competition among complements and user confusion on the other. The goal of this research is to provide a comprehensive answer to these...

Examining the Effect of Patent Registration on the Attraction of Venture Capital: the Moderating Role of Collaborative Patents In the Field of Artificial Intelligence

, M.Sc. Thesis Sharif University of Technology Khademi, Milad (Author) ; Miremadi, Iman (Supervisor)

Abstract

Artificial intelligence is a field that has made another revolution in the Fourth Industrial Revolution and has become one of the most widely used emerging technologies in the present era. Further investigation of the trends in this field shows that it has shown increasing growth in recent years. Also, in the future, this trend will continue and fundamental changes will occur in societies. For this reason, countries must definitely pay the necessary and sufficient attention to this field in their growth and development path. To achieve this growth path, it is intended to evaluate the status of leading countries in the field of artificial intelligence using two key variables in technological...

The Impact of Digital Technologies on CO2 Emissions: A Comparison between Developed and Developing Countries

, M.Sc. Thesis Sharif University of Technology Mahmoudi, Sanaz (Author) ; Miremadi, Iman (Supervisor)

Abstract

The importance and vitality of focusing on sustainable transition and reducing carbon dioxide emissions are clear to everyone today. However, until recently, the impact of digitization as a major global trend involving the application of digital technologies to change and optimize various elements of business, society, and daily life on the environment and carbon dioxide emissions has been underestimated. Despite the growing amount of research in this field, according to current studies, the connection between digitization and carbon dioxide emissions is not clear. To achieve environmental and sustainable development goals, fossil fuel consumption and greenhouse gas (GHG) emissions must be...

The effect of Information and Communication Technologies Use on Disease Burden in Countries

, M.Sc. Thesis Sharif University of Technology Oraei, Mona (Author) ; Miremadi, Iman (Supervisor)

Abstract

Researchers are continuously investigating the factors influencing the burden of disease. Studying these factors contributes to improving the health status of communities. Although previous studies have addressed the impact of digital technologies on health improvement, the effect of information and communication technology (ICT) usage on the disease burden in countries has not been empirically studied. Therefore, this study examines this impact and considers the level of development of countries as a moderating factor. Results from a panel data set of 1,079 observations across 83 countries over 13 years indicate that the use of information and communication technology reduces the disease...

A novel ZVT/ZCT PWM converter used for solar battery chargers with reduced conduction loss

, Article 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015, 20 September 2015 through 24 September 2015 ; 2015 , Pages 5357-5362 ; 9781467371506 (ISBN) Mousavian, H ; Bakhshai, A ; Jain, P ; Zolghadri, M. R ; Sharif University of Technology

Institute of Electrical and Electronics Engineers Inc 2015

Abstract

In this paper a novel structure of a zero- voltage transition PWM boost converter is proposed. The main switch and diode of the converter are turned on and off under zero voltage transition. In addition the auxiliary switch and both diodes operate in ZCT condition. The auxiliary circuit consists of a transformer, a snubber capacitor and two diodes. Without imposing much current stress, the switching loss reduces significantly. So a higher efficiency converter is achieved. The simple structure and a wide range of operating current are the advantages of the proposed converter, which make it useful for solar battery chargers etc. The operation principles of the proposed converter are explained...

Teraffic Analysis with the Usage of Big Data Anlytics

, M.Sc. Thesis Sharif University of Technology Miry, Reza (Author) ; Gholampour, Iman (Supervisor)

Abstract

Predicting traffic condition is one of the most important topics for traffic engineers and is a vital part of smart city. Extracting traffic behavior and realizing new traffic behaviors plays undeniable parts in big decision making of cities. On the other hand, progress of new technologies and devices for controlling and monitoring traffic caused the volume of traffic related data to grow exponentially. Velocity and variety of these data made normal data mining solution to fail in modeling and performing well. New data era has changed the view of large numbers of science and engineering majors. Traffic engineering also needs big data analytics for process of its own big data. Thus the need...