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Simulating the push-out test and conducting parametric study using finite element model are conducted using perfobond connectors. The finite element model was verified through comparing with push-out test results. The verified finite element model was then used to conduct parametric study aiming to investigate the effect of several parameters, such as height and thickness of connector, cross sectional area and yield strength of transverse reinforcement, concrete compressive strength and rib holes, on resistance capacity. The results of the parametric study are treated statistically to produce a mathematical model suggested to estimate the resistance capacity of the perfobond connector.

The present paper describes the study of the phytochemical properties and anti-HIV activity of the phenolic isolates of the plateau medicinal plant Daphne acutiloba Rehd. (Thymelaeceae). Two new lignans named daphnenin (1) and daphnetone (2), along with 11 known ones, were isolated, and their structures were elucidated by 1D and 2DNMR spectroscopy aswell as HR‑ESI‑MS. In the anti-HIV activity study, daphnenin (1) and caffeic acid n-octadecyl ester (13) showed definite anti-HIVactivity with EC(50) values of 0.39 and 0.16 μg/mL, respectively.

This study examines the spatial effect of R&D capital and labor market distortions on the green total factor energy efficiency (GTFEE) using a dynamic spatial Durbin model in China from 2000 to 2018. The results show that 1) China's GTFEE exhibits path‐dependent and agglomeration characteristics in terms of time and space, respectively. In both spatial and temporal dimensions, an increase in local GTFEE stimulates future local GTFEE and inhibits future GTFEE growth in neighboring areas. 2) R&D capital market distortion has a continuous inhibiting effect on the local GTFEE in the short and long terms. R&D labor market distortion has a continuous stimulating effect on the local GTFEE, and its effect gradually strengthens. 3) R&D capital market distortion may indirectly weaken the GTFEE by inhibiting green innovation and industrial upgrading. R&D labor market distortion may indirectly improve the regional GTFEE by suppressing the energy rebound effect and improving green innovation. Based on these results, a series of policy recommendations are proposed.