According to the General Stability Criterion, a closed loop system will be stable if and only if all the roots of the characterized equation have negative realparts.
根据总体稳定性判据,闭环系统稳定,当且仅当所有的特征方程的根有负面真正的部分。
3
The imaginary parts of the polarization and correlation contributions are calculated analytically and the realparts of them are obtained by means of dispersion relation.