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飞溅是激光深熔焊接中最严重的缺陷之一。本文通过熔池原位光学观察和板材质量亏损计算,研究了高功率光纤激光深熔焊接过程中的飞......
本文报道了由双光子激发PTP(p-terphenyl)染料蒸气产生了340~385nm的受激带辐射以及检测三光子电离信号的研究结果。文中对有关的过......
不同介质的激光器组合以后具有更多优点,称为混合型激光系统。文章介绍作者研制的三种混合型激光系统:气-固、固体-准分子和低-高......
A few months earlier, Muji, the Japanese life-style brand that sells household goods and clothing, opened an 11,000 square-f......
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......
An experimental investigation was conducted to identify the characteristics of crack growth in high performance concrete......

