The stiffness matrix corrected by the method not only satisfies the characteristic equation, but also is the unique symmetric positive semidefinitematrix.
用这个方法修正的刚度矩阵不仅满足特征方程，而且是唯一的对称半正定矩阵。
2
Interior point method for semidefinite programming data collation ac and DC systems unified reactive power optimization algorithm to determine the coefficient matrix.
说明：半定规划内点法数据整理交直流系统统一无功优化算法，系数矩阵的确定。
3
The paper studied the multiobjective semidefinite programming with a semidefinite constraint of a matrix function and a multiobjective function.