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 半对称 [bàn duì chèn添加此单词到默认生词本
hemihedry

  1. 对称振子组成的矩形平面阵作为平面波综合的理论模型,用这一新方法寻求阵列单元的最佳幅相分布,以使所综合出的准平面波质量最好。
    With the rectangular planar array which is made up of half-wavelength dipole elements as the theoretic model of plane wave synthesis, the novel method is used to seek optimization for amplitude and phase distribution of array element so as to make the quality of quasi plane wave synthesized to be the best.
  2. 摘要本文给出了矩阵反问题AX=B具有可对称正定化解与可对称半正定化解的必要充分条件,得到了通解的表达式,同时解决了方程的对称半正定化解对己给矩阵的最佳逼近问题。
    In this paper, the necessary and sufficient conditions for the existence of and the expresssions for the positive definite (semidefinite) symmetrizable solutions of inverse problems AX=B are obtained, and the optimal approximation semidefinite symmetrizable solution to given marices is also derived.
  3. 讨论了主子阵约束下矩阵反问题的对称半正定解存在的充要条件,并在有解的情况下给出了其通解的一般表达式.同时也把所得结论应用到相应的逆特征值问题,并给出了逆特征值问题的极小范数解.
    This paper discussed the necessary and sufficient conditions for the existence of symmetric nonnegative definite solutions of a matrix inverse problem with a submatrix constraint.The expressions of the general solutions under solvable case were obtained.Furthermore,the results were applied to the relative inverse eigenvalue problem,and the minimum norm solution for the inverse eigenvalue problem was presented.



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