Papers by Keyword: Optimal Theory

Abstract: Opportunistic Networks (ONs) are the newly emerging type of Delay Tolerant Network (DTN) systems that opportunistically exploit unpredicted contacts among nodes to share information. As with all DTN environments ONs experience frequent and large delays, and an end-to-end path may only exist for a brief and unpredictable time. In this paper, we employ optimal theory to propose a novel buffer management strategy named Optimal Buffer Scheduling Policy (OBSP) to optimize the sequence of message forwarding and message discarding. In OBSP, global optimization considering delivery ratio, transmission delay, and overhead is adopted to improve the overall performance of routing algorithms. The simulation results show that the OBSP is much better than the existing ones.

Abstract: Abstract：The power system simulation model is established aimed at the hybrid electric bus. Optimal calculation model with restrictions is deducted at the target of minimizing equivalent fuel consumption. The optimal torque distribution of Chinese typical city cycle is solved with optimal theory. The simulation results reveal that the optimal control strategy can improve fuel economy and power system efficiency significantly.