Sharif Digital Repository

Increasing the speed of marine transportation services for specific mission and rapidly movement of persons or product always have been considered major issue in maritime industry. In recent years different technology have been used by high speed vessels manufacturer for increasing the safety of crew and passengers at sea. Catamaran is one of the most important high speed craft in marine transportation industry. High speed catamaran nonlinear behavior in high velocity is causing longitudinal instability and large motions. Active control surfaces like hydrofoil and interceptor can be used for reducing high speed catamaran motions in waves. This control surfaces react an adequate action... 

Many technologies should be applied for transportation or consumption of natural gas. There are many different ways for transporting natural gas from origin of production to the location of consumption which the simplest way is transportation via pipelines but for transportation of natural gas for long distances, we can not use this method in this way we should apply other technologies such as converting the natural gas to the liquid state. For using this method, first we should liquefy the natural gas up to -162 degree of centigrade at the atmospheric pressure and then transport it with large cargo ships. By using this method, the transportation costs are decreased in compared with the... 

Persian Gulf with 21 Iranian islands and various ports from Makran’s coast in the south east of the country to Khorramshahr port in the southwest with significant potential for promotion of tourism industry and transportation of marine passengers between the coastal provinces of the country and the neighboring countries of the southern border of the Persian Gulf. The shipping of the sea includes different types of floats with different passenger capacities and strokes that the floating right selection is appropriate to the type of trip and the number of passengers which including the various costs.In summary, what we are looking for in this research are:
1.Select location or locations as... 

With the expansion of global trade and economy and, in parallel, with the development of maritime transport, noise pollution caused by the sounds emitted by ships, vessels, submarines and offshore turbines threatens the environment of marine life. In addition, with the development of maritime weaponry, the need to cover the submarines with materials that reduce the reflection of sonar waves and absorbs them to provide acoustic stealth is felt more. Considering the focus of the most of the researches on the second topic and its practical importance, the present research is also in the same direction. The main goal of this project is to study the acoustic behavior of a polymer-based porous...