Sharif Digital Repository

The Security of oil and gas supply and climate change are the most important challenges facing human today. Transportation sector is an important energy consumer sector. The share of transport sector in greenhouse gas emission, which steams from usage of hydro carbons, is considerable. Energy consumption and emission of pollutants in transport sector depend on the efficiency and technical features of transport technologies. Therefore, diffusion of new technologies in to transport sector has significant impact on energy usage and emission of pollutants in energy system. The aim of this project is to evaluate main features of life cycle of transportation technologies. Therefore, we developed a... 

Logistics performance is one of important factors in economic growth of a country. Many firms in all over the world outsourcing their logistics activities to third party logistics companies (3PL) in order to gain higher performance and reduce time and cost of logistics services. Important role of 3PL companies and lack of them in Iran’s logistics industry were the main drives of this of this thesis. In this thesis after introduction and literature review, the main question of thesis will be defined this is about advantages of using 3PLs in Iran logistics industry and structure of them. To find the answer, based on information and statistical reports from world bank, Iran logistics... 

In this project railway industry is introduced as an optimal alternative for transportation in this country. To select the best choice, four railway technologies that have commercial capacity are presented and the most appropriate one is selected with respect to several criteria, including fuel consumption. The purpose of this thesis is to present the best technology in order to improve Iranian railway transportation by considering the shortage of fossil resources as well as pollution.In this project,the copmparison of alternatives and assessment criteria for best technology selection is done by Analytical Hierarchy Process (AHP) and the questionaries are filled out by industry and... 

This thesis represents a comprehensive view of electric vehicles from the macroeconomic policy in the energy sector perspective. In fact, in this thesis all the efficient factors in the presence of electric vehicles in the transport sector have been completely proceed. Environmental, economic, social and political factors, power grids and infrastructure are considered as the impressive factors. In order to check all factors comprehensively, Systems thinking based on dynamic system method is used. The causal relationships between all the variables which are involved in the presence of electric vehicles and related models to this thesis are simulated in VENSIM software. To investigate this... 

The transportation sector is the largest oil consumer sector in the world. Iran is no exception to this, and the transportation sector, especially road transport, has a large share of oil and energy consumption in Iran. Diesel supply security in The road transport system has been implemented but it has not been properly managed for gasoline, as the country has been an importer of gasoline for many years and large cities suffering the pollution caused by light duty vehicles. Analyze the transportion of light duty vehicle by the game theory method can detect the barriers to reducing fuel consumption. For this purpose, the main Actors affecting the transport of light duty vehicles - people,... 

In this thesis, we investigate some transport and many body properties of the 2DEG at the interface of LaAlO3=SrTiO3. First, following Boltzmann approach,we calculate conductivity and mobility of the system. We find that the mobility varies inversely with the cubic power of the carrier density ( / n3 2D) in good agreement with the experimental results. Taking in to account the variations of the dielectric constant of SrTiO3 with carrier density together with the variable impurity density are remarkably important in order to explain the abrupt decrease of the mobility with increasing the density in this system. We find that although the multiband nature of the system and interband... 

Quadrotors are one of the most popular unmanned aerial vehicle (UAVs) that has been subject of extensive research in recent years. One of the most important applications of these aerial vehicles is transporting a cable-suspended payload from one point to another. The major challenge in modeling of this system is dynamic coupling which exist between all components of the system i.e. payload, cable and quadrotor. The purpose of this research is mathematical modeling and dynamic analysis of the system in presence of this dynamic coupling and considering the effects of cable's flexibility. In this regard, it is assumed that the payload has variable mass. In this thesis, in the first step, by... 

Gasoline is the major fuel used in transportation sector, even though it's environmental associated concerns and energy security problems receive, and continue to receive, much debate. On the other hand, growth in Iran's population and economy might cause an increase in the amount of cars in the market, consequently, in the transportation sector. The proposed phenomenon will bring a degree of rising in consumption of gasoline together with air pollution, especially in the big cities. Energy policy has acknowledged to be significant step in developing long-term plans across the globe. In this regard, developing policy-based methods and models are of a great importance toward forecasting the... 

The oil refining industry, as the first oil supply chain, is of great importance. By examining the issue of the Iranian Oil Refining Industry, using the game theory, one can find an accurate analysis of the barriers to the development of this industry. For this purpose, the main factors affecting the oil refining industry, the government and the refinery's owner, are modeled and their benefits are considered. By examining the relationship between these actors and their actions, the following strategies are proposed to improve the administration and regulate the Iranian oil refining industry:
1- Refining feed prices, according to the quality of crude oil (sulfur content and API... 

Regarding to emergence of the globalization concepts in manufacturing, technology and information technology has come to aid of the organizations to expand communication across the globe, in order that companies can overcome many of their deficiencies in this way. To achieve this goal, Cloud Manufacturing (CMfg) system have been investigated, while today the CMfg is a new manufacturing paradigm and is one of the dominant concepts in manufacturing industries. Regarding to the nature of the cloud, the resources used to meet the customer demands are not necessarily concentrated in a specific geographic location, or the demand of a customer may not be satisfied with a distinct service, as a... 

One of the most important successes of factories is to pay attention to the production program. Production of lip program products in the dairy industry is possible in some ways, but only if production conditions and other factors are successful in planning to help progress. The dairy industry, as a fast-moving consumer goods with lower profit margins and less durability than other products, and the possibility of return and reverse logistics, needs a well-codified, practical and correct planning to be done with the least performance of the logistics process. In this way, the individual flexibility of the production process is also considered, so that production with cost and labor and... 

From the past seven decades till today, many researchers have tried to convey research to further bring the optimization results of routing problems closer to real-world problems by adding more and more assumptions and constraints to the basic vehicle routing problem, such as vehicle capacity limitations or time-related constraints. Moreover, we know that in real-life many parameters are under uncertainty. Therefore, considering uncertainty in some of the data and parameters is a way to approach the goal of bringing the theoretical results, closer to real-life transportation and routing problems. In this research, we have studied the vehicle routing problem considering mobile and stochastic...