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It is absolutely imperative for development of material science to adjust upconversion luminescence (UCL) properties of highly doped upconversion nanoparticles (UCNPs) with special optical properties and prominent application prospects. In this work, featuring NaHoF4@NaYbF4 (Ho@Yb) structures, sub‐30 nm core–multishell UCNPs are synthesized with a small NaHoF4 core and varied Gd3+/Yb3+ coexisting...
We applied test automation in the style of Behavior-Driven Development (BDD), an agile software development technique. In applying BDD, the problem is that a large amount of similar configurations of network switches have to be written in the BDD test specification files. To solve this problem, parameterization of configurations is considered effective. However, Gherkin, the BDD test specification...
A new system based on solar photovoltaic/thermal-ground source heat pump (PV/T-GSHP) was proposed to solve the problems of energy shortage and high energy-consuming buildings in China. The operation performance of the PV/T-GSHP system in a demonstration project in Dalian of China was studied and energy saving performance was analyzed. The results show that this PV/T-GSHP system can reduce the temperature...
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