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DRL-based intersection traffic efficiency enhancement utilizing 5G-NR-V2I data
사지드,Kale Arati K.,Chang KyungHi 한국통신학회 2023 ICT Express Vol.9 No.6
Recent research on reinforcement learning (RL) based traffic management shows promising results, yet it is a significant issue due to increasing volume of traffic and lack of real time traffic information. Improvements of RL algorithms and vehicle-to-everything (V2X) communications technologies are creating new prospects to achieve better traffic efficiency. This paper proposes a new method, namely Vehicle-to-Infrastructure based Traffic Signal Control (V2I-TSC), to capture realistic traffic state using vehicle-to-infrastructure (V2I) communications under 5G-NR-V2X paradigm. It uses single agent RL framework to optimize a traffic signal control which is trained and evaluated through Simulation of Urban MObility (SUMO) simulator. The experimental results show that our proposed method enhances traffic efficiency at the intersection compared to the general traffic control method.
사지드 알리,장춘만 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.6
The purpose of the present study is to analyze and evaluate the performance of a small Darrieus wind turbine installed at the Urumsil region of Deokjeok-do Island in the west of South Korea 50 km away from Incheon. This place has no government electricity so alternate resources of energy needed to be installed there. For this purpose a small Darrieus wind turbine with the capacity of 1.5 kW was developed and installed at the site. The experimental power output of the wind turbine is less than the designed power at the same values of wind speed. This power loss is mainly due to the highly unsteady nature wind of sudden changes in magnitude of wind speed and wind angle. The results of current study can be used to make a future power generation plan for Deokjeok-do and other nearby small islands.
사지드 알리,장춘만 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.6
In the present study, the wind characteristics were analyzed according to the time averages to evaluate the performance of small wind turbines required for the development of energy independent village. Measuring data of wind speed were recorded between January 2016 and April 2016 every second. Experimental data is averaged out using 5, 10, 15, 20 and 30 minute time steps. Throughout the experimental data analysis, 5 minutes averaged data is used to analyze the performance of the wind turbine, because it produces a minimum turbulence intensity in wind speed. The measuring power of the wind turbine is less than the designed value due to the unsteady nature wind of sudden changes in magnitude of wind speed and wind angle. Detailed wind conditions are also analysed using two variable Weibull probability density functions.