Balanced energy-efficient relay selection scheme in wireless mobile relay networks

In order to resolve the relay selection problem in wireless mobile relay networks （WMRNs）, a novel balanced energy-efficient mobile relay selection scheme is proposed in this paper. Compared with traditional counter-based algorithm, distance and energy consumption are considered from network respect to provide a better network lifetime performance in the proposed scheme. Also, it performs well when nodes move freely at high speed. A random assessment delay （RAD） mechanism is added to avoid collisions and improve transmission efficiency. Simulation results reveal that, the proposed scheme has advantages in prolonging network lifetime, balancing energy compared with existing counter-based scheme. consumption and reducing the total energy consumption

选本批评与清代词史之建构——论谭献《箧中词》的选词学意义

20世纪以来人们接受的清代词史,最初在相当程度上是清代的"选词学"提供的,《箧中词》是其中最具价值的选本之一。作为清代重要的词选本,《箧中词》在推尊词体、勾勒清词流变、选本选源等方面都独具眼光,体现了谭献借助选词批评建构清代词史的用意,以及关于选词批评的若干思考,具有重要的选词学意义。本文侧重于从选词学的新视角,对《箧中词》的选词学思想及它对20世纪清词史建构的意义等进行探讨,以更为深入地认识《箧中词》的词学价值,从而在一定层面上理解选词学在文学史建构中的意义。