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高稳定度红外平面黑体辐射源的研制
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作者 冯国进 吴志峰 郑春弟 《计量学报》 CSCD 北大核心 2023年第8期1176-1181,共6页
为了满足现场复杂环境红外辐射测量设备定标的要求,研制了2套便携式高稳定度、有效辐射面为400 mm×400 mm的红外热辐射源。其中1套采用基于密闭流体控温的原理,主要工作在比环境温度低10℃的相对低温工作区,用于作为环境辐射的参... 为了满足现场复杂环境红外辐射测量设备定标的要求,研制了2套便携式高稳定度、有效辐射面为400 mm×400 mm的红外热辐射源。其中1套采用基于密闭流体控温的原理,主要工作在比环境温度低10℃的相对低温工作区,用于作为环境辐射的参考低温点;另1套采用大面积半导体制冷器(TEC)控温的原理,主要工作在比环境温度高10℃的相对高温工作区。2套红外辐射源的表面发射率均高于0.97,控温稳定性可达0.01℃/h,红外辐射源面温度面均匀性优于0.2℃。 展开更多
关键词 计量学 红外辐射源 流体控温 半导体制冷器控温 高稳定度
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Two equilibria of the Antarctic Circumpolar Current and its associated Meridional Overturning Circulation 被引量:3
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作者 CHAO JiPing LI YaoKun 《Science China Earth Sciences》 SCIE EI CAS 2012年第2期315-322,共8页
The Antarctic Circumpolar Current (ACC) and its associated Meridional Overturning Circulation (MOC) is investigated through a nonlinear inertia theory model, which consists of two layers--an upper Ekman layer driven m... The Antarctic Circumpolar Current (ACC) and its associated Meridional Overturning Circulation (MOC) is investigated through a nonlinear inertia theory model, which consists of two layers--an upper Ekman layer driven mainly by sea surface wind stress and a lower thermocline controlled by ideal fluid nonlinear equations which can be solved by identifying the form of the arbitrary functions. The results show that the thermocline has a two-equilibrium solution though given the same Ekman layer condition. Compared to the first equilibrium, the second one has a heavier intensity and deeper circulation, which seems more consistent with the existing data. 展开更多
关键词 Antarctic Circumpolar Current Meridional Overturning Circulation inertia theory two equilibria
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