Mobile Edge Computing(MEC)is widely used in the new Internet of Things due to its low delay,low power consumption and high system capacity.To further make full use of the computing resource and reduce the power consumption,the scheme of computation offloading,computation processing sequence and power allocation are studied in green MEC system with D2D assisted offloading.To achieve green offloading,total power minimization of the terminal devices is put forward which considers many different application requests.To solve the original NP-hard problem,the Green Offloading and Application Processing Sorting Algorithm(GOAPSA)is proposed based on greedy method and bubble sort method.Simulation results show that the proposed algorithm can reduce the total system power consumption and increase system capacity by adjusting flexibly the processing sequence of applications and transmission power allocation and using D2D-assisted offloading.

本文总结分析了我国水务行业存在高投资、高耗能以及难以治理的关键性问题,讨论了传统的不合理的城市管网改造方式,通过详细介绍"真空高速流"技术在城镇水务领域节能降耗的巨大潜力,以多年的研究成果为依据,论述了"真空流"技术与水务行业各领域相结合的作用和意义,并提出我国水务行业未来节能降耗的发展思路与可持续发展趋向。