It is compatible with equations of rigid multibody systems because of using the concepts, such as path matrix, incidence matrix, instantaneous augmented body.
由于采用通路矩阵、关联矩阵、瞬时增广体等概念，其形式与多刚体系统动力学方程兼容。
In this paper, an algorithm for finding the inverse matrix of tridiagonal matrix by solving systems of linear algebraic equations is proposed.
根据三对角矩阵的特点，给出一种利用解线性方程组的方法求三对角矩阵的逆矩阵的算法。
Then, the learning of the weight matrix can be done by means of solving a group of systems of linear equations. Last, the mathematical base of the outer-product leaming method is pointed out.
将权矩阵的学习过程归结为用梯度下降法求一组矛盾线性方程组的过程；
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