WebApr 12, 2024 · Here, we propose and experimentally realize a photon-recycling incandescent lighting device (PRILD) with a luminous efficacy of 173.6 lumens per watt (efficiency of 25.4%) at a power density of 277 watts per square centimeter, a color rendering index (CRI) of 96, and a LT70-rated lifetime of >60,000 hours. WebFeb 22, 2024 · Written from 1959 to 1966, this is the first officially compiled book of architectural history in China, describing the development of Chinese architecture in a chronological order. As an integral part of architecture, building materials used in each historical time are briefly described. Liu Xujie 刘敍杰,ed. Zhongguo gudai jianzhushi. …
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China National Building Material - Wikipedia
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