Sharif Digital Repository

Traffic accidents, is an inevitable event. There are various reasons for accidents and almost not possible to identify all of them, but a careful study of these phenomena can identify the main causes of this phenomenon. This study estimates Multi-Vehicle severity in terms of different weather. Accidents data the Including 2,949 accidents recorded during 1388 to 1392 in six axes of the East Azerbaijan roads in three levels of accident severity: damage, injury and death. For modeling, sequential Logit model was selected because accidents severity have Sequential nature. This model used the Stata software, version 12, for evaluation and sensitivity analysis. The obtained model consists of... 

Micro Combine Heat and Power (Micro CHP) systems are one of the most important devices for energy saving that produce heat and power with the use of natural gas or other fuels. This research presents technical and economical feasible study of using Micro CHPs in different climatic zones of Iran. In order to economic studies in different climates of Iran, these zones are categorized in to five; Tehran, Rasht, Bandar Abase, Ardebil and Yazd, based on weather condition. Specifications of each zone, such as heating and cooling degree days and other parameters that are required for estimating energy consumption is determined. The calculation of energy consumption has been conducted based upon...