By the use of the combinations nature this paper demonstrates an inverse matrix extracting method of integer matrix and gives the formula of reversematrix.
本文利用组合的性质证明了一种整数矩阵求逆矩阵的方法，给出了求逆矩阵的公式，并通过了实例验证。
2
It can be used to measure the luminous intensity, forward voltage, reverse current of each luminous dot in all kinds of LED luminous dot matrix.
能测试各种LED发光矩阵每个发光元的发光强度，正向压降和反向电流。
3
The inverse Jacobi matrix of the 6-sps parallel manipulator is obtained from differential equations of the reverse displacement analysis.