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强化固溶对7055铝合金力学性能和断裂行为的影响 被引量:58
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作者 陈康华 刘红卫 刘允中 《中南工业大学学报》 CSCD 北大核心 2000年第6期528-531,共4页
残余可溶结晶相颗粒是制约高强度铝合金力学性能的重要因素 .作者通过改变固溶热处理条件并结合金相组织观察和断口分析研究了强化固溶对提高 70 5 5铝合金力学性能的作用 .结果表明 :采取逐步升温固溶处理可使最终固溶温度超过多相共... 残余可溶结晶相颗粒是制约高强度铝合金力学性能的重要因素 .作者通过改变固溶热处理条件并结合金相组织观察和断口分析研究了强化固溶对提高 70 5 5铝合金力学性能的作用 .结果表明 :采取逐步升温固溶处理可使最终固溶温度超过多相共晶温度而不产生过烧组织 ,提高残余可溶结晶相的固溶程度和合金力学性能 .强化固溶的 70 5 5合金的屈服强度和抗拉强度分别达 715MPa和 75 0MPa,且延伸率约为 10 % ;微量元素Zr比Cr更有利于提高 70 5 5合金的力学性能 ,且在强化固溶条件下 ,提高效果更加明显 .通过断口分析显示 ,合金的断裂属晶内韧窝断裂与沿晶断裂的混合断裂 ;强化固溶后 ,残余结晶相引起的晶内韧窝断裂减少 。 展开更多
关键词 热处理 强化固溶 显微组织 结晶相 断裂性能 7055铝合金 超高强度铝合金
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Identifying latent workforce capacities for extreme heat resilience:An artificial intelligence assisted approach
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作者 Jieshu Wang Patricia Solís 《Energy and AI》 2025年第3期886-906,共21页
Extreme heat events,intensified by climate change,pose critical challenges to public health,infrastructure,and workforce resilience.Despite the urgency of these challenges,there is no systematic framework to identify ... Extreme heat events,intensified by climate change,pose critical challenges to public health,infrastructure,and workforce resilience.Despite the urgency of these challenges,there is no systematic framework to identify workforce adaptive capacities that can help build regional heat resilience.This study introduces a novel large language model assisted approach,using task-level data from the O^(*)NET dataset,to identify workforce capacities that enhance heat resilience.By defining heat-solution tasks as activities mitigating heat impacts,protecting public health,or improving infrastructure,we classify heat-solution occupations and dual-impact occupations,which are both vulnerable to heat and critical to heat resilience.A case study of the state of Arizona in the United States analyzed 16,398 tasks across 663 occupations,identifying 110 heat-solution occupations(about 14%of Arizona’workforce)and 31 dual-impact occupations.The study reveals how energy-relevant occupations,such as HVAC technicians,solar installers,and retrofit specialists,contribute to climate adaptation,linking occupa-tional roles to the clean energy transition and resilient infrastructure.By leveraging large language models,our method provides a scalable,AI-powered tool to analyze workforce data and identify capacities necessary for energy efficiency and hazard resilience.The findings not only demonstrate the potential of large language models in workforce analysis but also contributed to shaping Arizona’s first Extreme Heat Preparedness Plan.This study offers a scalable method to uncover latent capacities and informs policies on workforce development,safety regulations,and climate-resilient infrastructure,serving as a model for other regions facing similar challenges. 展开更多
关键词 Extreme heat Workforce Heat resilience Occupations heat-solution occupations Climate adaptation Labor markets SUSTAINABILITY
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