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银含量对快速热冲击下Sn−xAg−0.5Cu焊点显微组织和力学性能的影响
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作者 彭晨 王善林 +6 位作者 吴鸣 尹立孟 陈玉华 叶科江 陈维政 张体明 谢吉林 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第6期1922-1935,共14页
使用高频感应加热设备研究Ag含量对快速热冲击下Sn−xAg−0.5Cu焊点的显微组织和剪切强度的影响。结果表明,Ag含量的增加使焊点表面更致密光滑,减少焊点内部长条状Cu6Sn5金属间化合物(IMC)的产生,从而提高焊点的抗氧化性。Ag能够加快焊点... 使用高频感应加热设备研究Ag含量对快速热冲击下Sn−xAg−0.5Cu焊点的显微组织和剪切强度的影响。结果表明,Ag含量的增加使焊点表面更致密光滑,减少焊点内部长条状Cu6Sn5金属间化合物(IMC)的产生,从而提高焊点的抗氧化性。Ag能够加快焊点界面IMC层的生长速度,Cu6Sn5层的生长速度由体扩散和晶界扩散共同决定,Cu3Sn层的生长速度由体扩散和界面反应共同决定。在快速热冲击环境下,焊点的断裂模式从韧性断裂转变为脆性断裂,而高Ag含量使得焊点的断裂模式转变时间更短,降低焊点的抗热疲劳性能。 展开更多
关键词 Ag含量 快速热冲击 Sn−Ag−Cu 焊点 生长动力学 断裂模式
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Interference Analysis of Co-Located Container Workloads:A Perspective from Hardware Performance Counters
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作者 Wen-Yan Chen ke-jiang ye +2 位作者 Cheng-Zhi Lu Dong-Dai Zhou Cheng-Zhong Xu 《Journal of Computer Science & Technology》 SCIE EI CSCD 2020年第2期412-417,共6页
Workload characterization is critical for resource management and scheduling.Recently,with the fast development of container technique,more and more cloud service providers like Google and Alibaba adopt containers to ... Workload characterization is critical for resource management and scheduling.Recently,with the fast development of container technique,more and more cloud service providers like Google and Alibaba adopt containers to provide cloud services,due to the low overheads.However,the characteristics of co-located diverse services(e.g.,interactive on-line services,off-line computing services)running in containers are still not clear.In this paper,we present a comprehensive analysis of the characteristics of co-located workloads running in containers on the same server from the perspective of hardware events.Our study quantifies and reveals the system behavior from the micro-architecture level when workloads are running in different co-location patterns.Through the analysis of typical hardware events,we provide recommended/unrecommended co-location workload patterns which provide valuable deployment suggestions for datacenter administrators. 展开更多
关键词 WORKLOAD characterization CONTAINER CO-LOCATION pattern HARDWARE performance COUNTER
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