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26MnB5钢的动态再结晶行为 被引量:6
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作者 郝庆乐 韩静涛 《钢铁研究学报》 CAS CSCD 北大核心 2016年第1期58-63,共6页
利用Gleeble-1500热模拟压缩试验获得了26MnB5钢在880~1 000℃、0.01~10s-1、最大变形55%条件下的真应力-真应变曲线,研究了26MnB5钢在试验条件下的动态再结晶行为。结果表明:26MnB5的真应力-真应变曲线在高温、低应变速率条件下出现... 利用Gleeble-1500热模拟压缩试验获得了26MnB5钢在880~1 000℃、0.01~10s-1、最大变形55%条件下的真应力-真应变曲线,研究了26MnB5钢在试验条件下的动态再结晶行为。结果表明:26MnB5的真应力-真应变曲线在高温、低应变速率条件下出现明显峰值点特征,意味着样品发生了动态再结晶;26MnB5再结晶程度和奥氏体晶粒均匀度随温度的增加或应变速率的降低而提高,而晶粒平均尺寸则表现出先减小后增大的趋势;利用Johnson-Mehl-Avrami(JMA)方程可以建立26MnB5钢动态再结晶动力学模型,模型预测值与实测值基本吻合。 展开更多
关键词 26MnB5 动态再结晶 晶粒尺寸 软化分数
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A survey of malware behavior description and analysis 被引量:5
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作者 Bo YU Ying FANG +2 位作者 Qiang YANG Yong TANG Liu LIU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2018年第5期583-603,共21页
Behavior-based malware analysis is an important technique for automatically analyzing and detecting malware, and it has received considerable attention from both academic and industrial communities. By considering how... Behavior-based malware analysis is an important technique for automatically analyzing and detecting malware, and it has received considerable attention from both academic and industrial communities. By considering how malware behaves, we can tackle the malware obfuscation problem, which cannot be processed by traditional static analysis approaches, and we can also derive the as-built behavior specifications and cover the entire behavior space of the malware samples. Although there have been several works focusing on malware behavior analysis, such research is far from mature, and no overviews have been put forward to date to investigate current developments and challenges. In this paper, we conduct a survey on malware behavior description and analysis considering three aspects: malware behavior description, behavior analysis methods, and visualization techniques. First, existing behavior data types and emerging techniques for malware behavior description are explored, especially the goals, prin- ciples, characteristics, and classifications of behavior analysis techniques proposed in the existing approaches. Second, the in- adequacies and challenges in malware behavior analysis are summarized from different perspectives. Finally, several possible directions are discussed for future research. 展开更多
关键词 Malware behavior Static analysis Dynamic Analysis Behavior data expression Behavior analysis MACHINELEARNING Semantics-based analysis Behavior visualization Malware evolution
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