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marine-industries
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A hybrid systems approach to determine effective factors on the growth of marine industries in developing countries
, Article International Journal of Business and Systems Research ; Volume 15, Issue 1 , 2021 , Pages 124-142 ; 1751200X (ISSN) ; Hosseini, S. H ; Aghaei, S. A ; Seif, M. S ; Sharif University of Technology
Inderscience Publishers
2021
Abstract
Marine industries have always been provided power and development for countries both militarily and economically. Due to the lack of essential economic, industrial, and technological infrastructure in developing countries, the development of marine industries has been facing serious obstacles. As a developing country, Iran has been tackling similar barriers. This paper aims at developing a conceptual model, to examine this complex problem, using a systems approach by which subsystems and casual loop diagrams have been created. Afterward, DEMATEL technique has been used, revealing the most effective variables. The research can remarkably help practitioners in appropriate recognition and...
Ship Scrap Yard Feasibility Study
, M.Sc. Thesis Sharif University of Technology ; Safaeie, Mohammad Reza (Supervisor)
Abstract
It seems that ship scraping industries is a part of economic of under developing countries because in this business the amount of investment and cost is little but benefit is high.Also it can be assume as an important part of marine and supplier for steel industries. The owners of ships and oil carriers save their money by scrapping the aged ships and renewing their marine transportation vehicles and the other benefit is reducing the environmental pollution. This business creating a large amount of job opportunity for workers, for environmental view it could be found that by scrapping the ships and producing scrap steel “which is the most important output of these factories” the mineral work...
An open-water efficiency based speed change strategy with propeller lifespan enhancement in all-electric ships
, Article IEEE Access ; Volume 9 , 2021 , Pages 22595-22604 ; 21693536 (ISSN) ; Peyghami, S ; Parniani, M ; Blaabjerg, F ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
In recent years, utilizing the electrical propulsion system in the marine industry has become widely popular. Control of the propeller has been a high-priority design challenge in this industry. One of the essential issues in propeller control is the speed control of the ships. A suitable control strategy for the propeller should be economically-efficient while ensuring stability, reliability, and power quality of the ship's power system. This article proposes an improved propeller control strategy for increasing/decreasing the ship's speed. This scheme consists of two strategies: a maximum acceleration strategy and an efficient operation strategy. The maximum acceleration strategy aims to...