When the match between the unemployed and the vacant positions is efficient, the economic system described by a four-dimensional differential equation system has a stable two-dimensionalmanifold.
当失业工人和空闲职位的匹配是有效时,表示经济系统的四维动力系统存在一个稳定的二维流形。
2
The other is about the calculation and experiment of the two-dimensional unsteady turbulent flow in an exhaust manifold.