نتایج جستجو برای: high- speed train

تعداد نتایج: 2217171  

Journal: :advances in railway engineering,an international journal 2014
mohsen ghazanfari parisa hosseini tehrani

with speed increasing in high-speed trains, due to limitations of other types of brakes, aerodynamic brake has become an important braking method. in this task to make better use of brake’s panel different configurations are examined and the best panel shape which provides the reasonable drag coefficient is introduced. the results of simulations are carried out with the computational fluid dyna...

Journal: :Journal of the Japan Society for Precision Engineering 1992

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1377

‏‎applications such as high definition viedeo reproduction, portable computers, wireless, and multimedia demand, and ever-increasing need for ligh-frequency high-resolution and low-power analog-to-digital converters. flash, two-step flash, and pipeline convertors are fast but consume large amount of power and require large area. to overcome these problems, successive approximation converter blo...

ژورنال: Journal of Railway Research 2018
Sarafrazi, Vahid, Talaee, Mohammad Reza,

Speed is the created air flow as well as slipstream effects as the trains move. These effects can have some level of impact on fuel and energy efficiency  of  the  train,  but  their  other  important  outcome  is  the emergence of turbulent flows at higher speeds which can cause aerodynamic  drag  forces  followed  by  noise  and  vibration.  Thus, slipstream effects have significant importanc...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 2001

The speed profile of the train will be determined according to criteria such as safety, travel convenience, and the type of electric motor used for traction. Due to the passengers and cargo on the train, the electric train load is constantly changing. This will require reassigning the speed controller’s parameters of the electric train. For this purpose, the Gravitational Search optimization Al...

Journal: :Prehospital and Disaster Medicine 2005

Journal: :Atlantis highlights in engineering 2023

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