7.3 Proposed solution methods for Mixed differential- algebraic equations 1.Coordinates partitioning v:Independent coordinates g= u:coordinates dependent on v u=f(v) 功，=[ Φ] Φ4=V Φ，i=Y Φi+Φ=VΦi+Φ，i=Y In case that is nonsingular i=Φw(V-Φ) i=Φ(y-更)7.3 Proposed solution methods for Mixed differential- algebraic equations        v u q u  q   u  v   qq V  q   q   uu  v v V  u  v   u v   ( ) 1 u V v u v      ( ) 1 u v u v       u  f (v)