This site presents a real-time, quarterly series on total factor productivity (TFP) for the U.S. business sector, adjusted for variations in factor utilization – labor effort and capital’s workweek.

共价有机框架(COF)材料是一类新型的晶态有机多孔材料，由活性有机单体通过共价键构建而成。COF材料因其具有结晶度高、结构及孔径可调、稳定性好等优点而在吸附、分离、传感、催化、电池和储能等多个领域受到了越来越多的关注。依据不同结构的含醛基及 ...