摘要通过方程系数直接判别实系数一元三次方程根的情况In this paper the real coefficient unary cubic equation roots are judged direetly through the ralation between the equation's coefficients.
5TZIOUVARAS D A,Mc LAREN P,ALEXANDER G,et al.Mathematical modles for current,voltage,and coupling capacitor voltage transformers[J].IEEE Transactions on power Delivery,2000,15(1):62-72.
