Narrator and Narrative Voice in “Soldier＇s Home”

＂Soldier＇s Home,＂ Hemingway employs a third person narrator which narrates the short story in a seemingly detached and indifferent narrative voice. However,further exploration of the narrator and narrative voice in the story demonstrates that,instead of being thoroughly detached,the narrator constantly penetrates into the protagonist＇s consciousness,merges with character＇s voice,and even betrays Hemingway＇s sympathies with his protagonist. This paper attempts to explore narrator and narrative voice used in this story which contribute a lot to the alienation theme of the story as well as the successful depiction and characterization of a young soldier who finds himself desperate,disillusioned and alienated after returning home from the First World.War.     

信息化养殖下的电子耳标设计

国内信息化牧场用于精准养殖的设备长期由Afikim公司垄断，同时自建数据库互不兼容的问题将会产生数据孤岛，国内牧场的养殖受制于人且成本高昂，在国际上综合竞争力不高。本文针对牧场养殖中的监测设备，设计了包含RFID芯片、计步器和ZigBee通信模块的电子耳标，可用于奶牛身份识别、运动监测及数据上传。其中，RFID芯片的设计基于GJB7377.1协议，计步传感器采用水银开关并采用亿百特E180-ZG120A EFR32作为ZigBee终端设备实现无线通信。综合之下，单个自主设计的可穿戴监测设备的成本远低于采购Afikim设备的成本，并且基于统一标准搭建数据平台，可以有效打破数据孤岛问题，大大降低国内牧场对于国外技术的依赖。     

基于时间相关性的梯度追踪多用户检测算法

为降低大规模机器类型通信基站端多用户检测的复杂度, 结合活跃设备在相邻时隙间的相关性和梯度追踪算法提出了相关性辅助的梯度追踪多用户检测(correlation-assisted gradient pursuit multi-user detection, CAGP-MUD)算法, 不仅避免了矩阵求逆的过程, 还减少了除第一时隙的其他时隙的迭代次数。为了进一步降低多用户检测算法的复杂度, 在CAGP-MUD算法框架内引入决策衰弱的思想, 对梯度最大值进行衰弱, 并以此作为阈值, 每次迭代可挑选出多个活跃设备, 以减少迭代次数, 称为相关性辅助的组梯度追踪多用户检测算法。对提出的两种算法进行了复杂度计算。理论分析和仿真实验表明, 和同类算法相比, 这两种算法的计算消耗降低了60%以上。