A variational formula combining mixed finite element method with discontinuous finite element method is derived for solving the two-group neutron diffusion equation in 2D.是什么意思_A variational formula combining mixed finite element method with discontinuous finite element method is derived for solving the two-group neutron diffusion equation in 2D.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句