正定对称矩阵 meaning in English

positive definite symmetric matrices

With the method , all integrals can be easily fulfilled on regular sub - domain boundaries , and to impose the essential boundary conditions , a penalty parameter can be used so that a positive definite and symmetric stiffness matrix may be obtained
计算中，积分都在规则形状边界子域上完成，因而容易实现；通过罚因子添加本质边界条件，从而使得到的刚度矩阵是正定对称矩阵。