摘要：The exit-hole in friction stir spot welded(FSSWed) 2024-T4 aluminum alloy joints was successfully repaired by using a three-phase secondary rectification resistance spot welding machine, which is termed as filling exit-hole based on resistance welding(FEBRW). The filling dynamic behavior of force was recorded by a device monitoring. Optical microscope(OM), electron backscatter diffraction(EBSD), and tensile shear tests and finite element modelling were conducted to investigate the repairing stages and bonding mechanisms of the repaired joints in detail. Results showed that exit-hole was completely filled and repaired experiencing three stages. Metallurgical bonding was achieved between plug and exit-hole wall in two forms, including melting bonding in the middle of the joints and partial diffusion bonding on both the upper and bottom of the joints. The highest tensile shear strength of the repaired joints was 7.43 kN, which was 36.3% higher than that of the as welded joints. Resistance welding paves an efficient way to repair the exit-hole in FSSWed joints.

摘要：目的分析新辅助化疗联合^(192)Ir后装近距离放疗、术后同步放化疗、术后辅助化疗对Ⅰb_(2)-Ⅱa期宫颈癌患者的生存影响。方法按配对设计收集2012年1月至2015年12月我院收治的有/无术前辅助治疗宫颈癌患者86对;分为2组,新辅助治疗治疗组接受新辅助化疗联合^(192)Ir后装近距离放疗后行手术治疗,手术组直接接受手术治疗;再对172例患者按是否行术后同步放化疗及是否行术后辅助化疗分组分析。结果新辅助化治疗组与手术组比较1、3、5年总生存时间,及复发、转移均差异无统计学意义(P>0.05);术后辅助化疗对3年总生存率差异无统计学意义(100%、96.5%,P>0.05);术后接受同步放化疗组3年总生存率大于未接受同步放化疗组(100%、91.8%,P<0.05)。结论新辅助化疗联合^(192)Ir后装近距离放疗、术后辅助化疗对Ⅰb_(2)-Ⅱa期宫颈癌患者的远期生存无影响;术后同步放化疗能提高该期患者远期生存时间。

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