Conservation laws for the Birkhoffian system and the constrained Birkhoffian system of Herglotz type are studied.We propose a new differential variational princ
Lithium-sulfur (Li-S) batteries have received more and more attention because of higher specific capacity and energy density of sulfur than current lithium-ion
The Yb:YAG is an excellent high-average power and ultra-short pulse laser crystal.Transition intensity parameters Aktp and Huang-Rhys factors are fitted to its