The score distribution of 920 questions in the postgraduate entrance examination of Southeast University is as follows:

1, and the basic concepts and classification of signals and systems account for 5 points.

2. Time domain analysis of continuous-time system accounts for 5 points.

3. Laplace analysis of continuous-time signals shows that the system function of continuous-time system accounts for 25 points.

4. The Z-transform analysis method of discrete-time system shows that the system function of discrete-time system accounts for 15.

5, discrete time series Fourier transform and Fourier series accounted for 30 points.