引入了平衡矩阵的奇异值分解（SVD）方法并解释了其力学含义。

The Singular Value Decomposition (SVD) method for the equilibrium matrix is developed and a physical explanation is given.

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利用矩阵的奇异值分解和矩阵分块方法，得到了最小二乘解的一般表达式。

By using the method of matrix singular values decomposition, the general expressions of the least squares solutions are given.

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用矩阵的奇异值分解和广义逆讨论标准线性规划问题解的存在性和唯一性问题。

Apply singular value decomposition and generalize inverse of the matrix to discuss the existence and uniqueness of the solution of the standard linear programming problem.

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