Based on Hertz contact theory,a method to determine the parameters of Kelvin impact model for seismic pounding analysis of bridges is proposed.The impact stiffn
Field observations demonstrate that calc-sinters occurred in the lakes of Badain Jaran Desert. 87Sr/86Sr ratios, 14C, δ13C and mineral compositions of calc-sin
An antiship missile with supersonic speed at minimum altitude is an effective weapon to break through a defense line. The former Soviet Union was a leader in th
Designing regional pattern is challenging for ecosystem restoration both in theory and in practice. The present study proposed a new approach to design regional