The condition of compatibility on the interfaces between each subdomain is satisfied weakly by introducing a Lagrange multiplier technique. In the computational domain, the finite element meshes can be non coincident at the interfaces.

• 子域交界面上的约束条件是通过引入一Lagrange乘子而得到弱满足的 ,在有限元离散子域的交界处网格可以是非匹配的。