Social-Aware Cooperation Among Mobile Terminals for Wireless Downlink Transmission

This paper investigates the social-aware cooperation(SAC) among mobile terminals(MTs), motivated by the fact that modern smart devices have much improved context awareness. Aware of the social ties, the cooperative network contains two layers of property: social and physical. In order to observe how the social awareness benefit the cooperation performance, we first formulate the social ties between MTs into parameters that can describe the cooperative behaviors by taking the mobility feature into account, defined as the conviction-approval-suspicion(CAS) model. Limited by the processing capability, partner selection is of great practical significance. To this end, the social-aware partner selection strategy is analyzed, and a significant superiority is observed compared to social-unaware selection. By analyzing the cooperative throughput, an explicit relationship between the degrees-of-freedom gain and the social-physical property is finally derived. Simulation results validate the theoretical analysis.

胫骨骨髓炎骨缺损骨搬移软组织并发症的处理

[目的]介绍胫骨骨髓炎骨缺损骨搬移软组织并发症的处理的手术技术和初步临床结果。[方法]2017年1月—2022年12月笔者采用骨搬移治疗54例胫骨慢性骨髓炎骨缺损。对会合端周围皮肤感染或坏死,分别采用局部清创植皮或皮瓣移植修复,或清创并皮肤牵张器牵张。对会合端软组织嵌顿采用局部软组织松解。会合端软组织嵌顿合并骨不愈合,行会合端清理植骨,更换锁定板外固定。晚期再次软组织缺损并骨外露,给予局部清创皮肤牵张。[结果]54例患者骨搬运长度3~14cm,外固定指数为1.2~2.5个月/cm。30例患者会合端顺利愈合,无软组织并发症,其余24例出现会合端周围软组织相关并发症,占44.4%。经上述方法给予相应处理后,局部软组织并发症均有效解决。[结论]胫骨骨髓炎骨缺损应用Ilizarov骨搬移早期软组织再次感染、单纯软组织嵌顿、软组织嵌顿伴对合端骨不愈合、晚期再次软组织缺损并骨外露等并发症发生率较高。虽然最终均可通过后期的治疗解决相关并发症,但是明显延长治疗过程,增加患者负担,应引起骨科医生的高度重视。