Analysis method of circuit - The voltage source series resistance is equivalent to the current source parallel resistance , Thevenin equivalent , Norton equivalence
1. Common circuit equivalent transformation methods ;
2. Writing method of node voltage equation , And can solve the circuit equation ;
3. Writing method of loop current equation ;
4. Superposition theorem , Thevenin's theorem and Norton's theorem , Maximum power transmission conditions .
Find the equivalent power supply model of the following circuits ：