A Combined Sentiment Analysis and Deep Reinforcement Learning Approach in Portfolio Formation

, M.Sc. Thesis Sharif University of Technology Beydaghi, Elham (Author) ; Manzuri, Mohammad Taghi (Supervisor)

Abstract

Forecasting the market trend has been one of the most challenging and hot topics among investors and shareholders. In fact, predicting stock trends leads to better choices for forming a suitable and optimal asset portfolio. To achieve this goal, it is necessary to try to minimize the risk caused by the inevitable fluctuations in the capital market and to maximize the overall investment return during the expected period. Forecasting the stock market can be very complicated due to the influence of stock prices on many factors, such as financial and monetary markets, news and political-economic-social events. In recent years, deep reinforcement learning methods have proven to perform well in...

Identifying and Rating Indicators for Measuring Iranian Entrepreneurship Ecosystem based on OECD Framework’s Domains with ANDE Method

, M.Sc. Thesis Sharif University of Technology Barati, Amir (Author) ; Yavari, Elham (Supervisor) ; Sharif, Hossein (Co-Advisor)

Abstract

“Entrepreneurship ecosystem” is defined as the elements – individuals, organizations or institutions – apart from the individual entrepreneur that are conducive to, or inhibitive of, the choice of a person to become an entrepreneur, or the probabilities of his or her success following launch. Entrepreneurial businesses operate locally or regionally and are therefore subject to local or regional contextual influence. Moreover particularly in larger countries there can exist significant variation in industry structure and economic base across regions, emphasizing the importance of regional focus. Adopting appropriate policies at the regional level need to have a deep and accurate...

A Method for Incremental Learning of Stream Data

, Ph.D. Dissertation Sharif University of Technology Kashani, Elham Sadat (Author) ; Bagheri Shouraki, Saeed (Supervisor)

Abstract

Today, the pace of information generation, fast processing and instant decision-making is increasing. In this regard, one of the main needs in the field of data management and processing is stream data processing. Today's world needs new methods to deal with and analyze these data. 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 for processing data streams, without having basic knowledge...

Winner Strategies in a Simulated Stock Market

, Ph.D. Dissertation Sharif University of Technology Taherizadeh, Ali (Author) ; Zamani, Shiva (Supervisor) ; Yavari, Elham (Supervisor)

Abstract

In this study, we explore the dynamics of the stock market using an agent-based simulation platform. Our approach involves creating a multi-strategy market where each agent considers both fundamental and technical factors when determining their strategy. The agents vary in their approach to these factors and the time interval they use for technical analysis. Our findings indicate that investing heavily in reducing the value–price gap was a successful strategy, even in markets where there were no trading forces to reduce this gap. Furthermore, our results remain consistent across various modifications to the simulation’s structure

Applying Gamification in Corporate Entrepreneurship Culture, Specially Missionary Organizations; Through SafirFilm Case Study

, M.Sc. Thesis Sharif University of Technology Jafarian, Hamid Reza (Author) ; Yavari, Elham (Supervisor) ; Banki, Sara ($item.subfieldsMap.e)

Abstract

Although existing literature on organizational culture and its change process contains meaningful and rich theories but our studies show that there is no perfect and detailed framework on linking organizational culture change and corporate entrepreneurship culture. In addition to that, Gamification –defined as taking the game design elements into non-game contexts– is a fruitful and academically rich research area. Fortunately an idea proposed recently to explain a method for enhancements in organizational culture in general, and in corporate entrepreneurship culture in particularby Yavari and Jafarian based on using game mechanisms. In their paper "A Gamification-Based Method for Corporate...

Hybrid of cerium dioxide nanoparticles/reduced graphene oxide as an electrode material for supercapacitor applications

, Article Journal of Physics and Chemistry of Solids ; Volume 159 , 2021 ; 00223697 (ISSN) Salarizadeh, P ; Askari, M. B ; Beydaghi, H ; Rastgoo Deylami, M ; Rozati, S. M ; Sharif University of Technology

Elsevier Ltd 2021

Abstract

In this study, we prepared cerium oxide (CeO2) hybridized with reduced graphene oxide (rGO) nanosheets using the hydrothermal method. CeO2 and CeO2/rGO were evaluated as electrode materials for use in supercapacitor applications. The structure and morphology of the synthesized materials were investigated. Cyclic voltammetry tests determined a high specific capacitance of 581 F g−1 for CeO2/rGO at a scan rate of 10 mV s−1 in 2 M KOH. In addition, the CeO2/rGO electrode retained 91 % of its initial capacitance after 5000 consecutive cycles, thereby indicating its excellent electrochemical stability. The excellent stability of CeO2/rGO was due to a synergistic effect between CeO2 and rGO. CeO2...

Novel proton conducting core-shell PAMPS-PVBS@Fe2TiO5 nanoparticles as a reinforcement for SPEEK based membranes

, Article Scientific reports ; Volume 11, Issue 1 , 2021 , Pages 4926- ; 20452322 (ISSN) Salarizadeh, P ; Javanbakht, M ; Askari, M. B ; Hooshyari, K ; Moradi, M ; Beydaghi, H ; Rastgoo Deylami, M ; Enhessari, M ; Sharif University of Technology

NLM (Medline) 2021

Abstract

In this study, new nanocomposite membranes from sulfonated poly (ether ether ketone) (SPEEK) and proton-conducting Fe2TiO5 nanoparticles are prepared by the solution casting method. Sulfonated core-shell Fe2TiO5 nanoparticles are synthesized by redox polymerization. Therefore, 4-Vinyl benzene sulfonate (VBS) and 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) are grafted on the surface of nanoparticles through radical polymerization. The different amounts of hybrid nanoparticles (PAMPS@Fe2TiO5 and PVBS@Fe2TiO5) are incorporated into the SPEEK matrix. The results show higher proton conductivity for all prepared nanocomposites than that of the SPEEK membrane. Embedding the sulfonated...

Simulation and Evaluation of Dosimetric Parameters of 125I Thermobrachytherapy Source with Ferromagnetic Core

, M.Sc. Thesis Sharif University of Technology Soleymanpoor, Mohammad (Author) ; Hosseini, Abolfazl (Supervisor) ; Sheibani, Shahab (Supervisor) ; Poorbaygi, Hossein (Co-Supervisor) ; Mohagheghpour, Elham (Co-Supervisor)

Abstract

In the method treatment of thermobrachytherapy, the method of this project, simultaneously use of two processes of thermotherapy and brachytherapy is considered, which can be a more effective treatment for the destruction of tumor tissue. In thermotherapy, the temperature of the tissue is artificially raised to a temperature that leads to cell dysfunction resulting in cell death. In brachytherapy, the destruction of defective tissue is done by placing a source in the tissue. In the present project, we supposed to consider both mechanisms simultaneously for treatment at the same time. In this project, radioactive material 125I is used as a source of radiation emission for brachytherapy. In...

Skin diseases modeling using combined tissue engineering and microfluidic technologies

, Article Advanced Healthcare Materials ; Volume 5, Issue 19 , 2016 , Pages 2459-2480 ; 21922640 (ISSN) Mohammadi, M. H ; Heidary Araghi, B ; Beydaghi, V ; Geraili, A ; Moradi, F ; Jafari, P ; Janmaleki, M ; Valente, K. P ; Akbari, M ; Sanati Nezhad, A ; Sharif University of Technology

Wiley-VCH Verlag 2016

Abstract

In recent years, both tissue engineering and microfluidics have significantly contributed in engineering of in vitro skin substitutes to test the penetration of chemicals or to replace damaged skins. Organ-on-chip platforms have been recently inspired by the integration of microfluidics and biomaterials in order to develop physiologically relevant disease models. However, the application of organ-on-chip on the development of skin disease models is still limited and needs to be further developed. The impact of tissue engineering, biomaterials and microfluidic platforms on the development of skin grafts and biomimetic in vitro skin models is reviewed. The integration of tissue engineering and...