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机器人激光焊接装置改善蒸发器的返修
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作者 ANDREW WOWCZUK richard miller +1 位作者 GERALD BRUCK 余燕 《锅炉技术》 北大核心 1991年第10期18-20,共3页
为了蒸发器管子腐蚀的返修开发了一种使用机器人和CO_2激光的新的焊接方法,与其它溶化焊方法相比,它能适应更宽的温度范围和几何形状,并且在比利时的许多核动力工厂已经成功地得到了证实。早期蒸发器返修主要是剥蚀管子的赌塞,这最终将... 为了蒸发器管子腐蚀的返修开发了一种使用机器人和CO_2激光的新的焊接方法,与其它溶化焊方法相比,它能适应更宽的温度范围和几何形状,并且在比利时的许多核动力工厂已经成功地得到了证实。早期蒸发器返修主要是剥蚀管子的赌塞,这最终将导致降低发电厂的效益或者更换整台蒸发器。套管是在原来的管子内插入一根新的管子,并且在已腐蚀的管子上。 展开更多
关键词 蒸发器 机器人 返修 激光 焊接装置
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Digital Equity and School Leadership in a Post-Digital World
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作者 Katrina Liu Rebecca Tschinkel richard miller 《ECNU Review of Education》 2024年第3期762-783,共22页
Purpose:This study analyzes digital equity realities in U.S.K-12 schools and the role that school leadership plays in digital equity.Design/Approach/Methods:Based on Selwyn's conception of technology as three inte... Purpose:This study analyzes digital equity realities in U.S.K-12 schools and the role that school leadership plays in digital equity.Design/Approach/Methods:Based on Selwyn's conception of technology as three interlocking elements(access,educational practices,and social context),we applied the ideals of equity and social justice to each of the three elements to conceptualize a framework of digital equity,situating school practice in the larger social,cultural,and political context of the United States.Guided by this framework,we conducted a systematic literature review of the current state of digital equity and school leadership in K-12 schools.Findings:The findings demonstrate that U.S.K-12 schools face digital inequity issues,including inequitable access to technology,exclusionary and punitive educational practices using technology,and an unjust social context for technology in schools.These findings indicate that school leadership plays an important role in digital inequity.OriginalityValue:Based on these findings,we present a framework to assist K-12 leaders in enhancing digital equity,including addressing educational inequities and creating an inclusive social context for the school,ensuring equitable accessibility to technology in schools,and supporting teachers in developing meaningful and equitable practices using technology to address the opportunity gaps encountered by marginalized learners. 展开更多
关键词 Critical Race Theory digital equity K-12 schools school leadership technology integration
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预测结直肠癌患者的生存率新的模型有帮助,但不应单独使用
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作者 Juliet Usher-Smith richard miller +1 位作者 Simon Griffin 顾晋(译) 《英国医学杂志中文版》 2018年第7期361-362,共2页
以临床和人口学特点相结合为基础,预估个体假定结局的概率。愈来愈多的风险预测模型有望支持患者和医生做决策。在一篇链接文章(doi:10.1136/bmj.j2497)中,Hippisley.Cox和Coupland应用英国初级保健数据库建立已诊断结直肠癌... 以临床和人口学特点相结合为基础,预估个体假定结局的概率。愈来愈多的风险预测模型有望支持患者和医生做决策。在一篇链接文章(doi:10.1136/bmj.j2497)中,Hippisley.Cox和Coupland应用英国初级保健数据库建立已诊断结直肠癌的男、女性患者其生存预估模型。然后他们在相同数据库中的患者分离群及英格兰公共健康癌症登记库进行验证。 展开更多
关键词 模型 预言 癌症
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