讨论了局部环上的矩阵表为初等阵之积的因子个数问题，并推广了域上的相应结论。
The number of the elementary matrices representing a matrix over a local ring are discussed, the corresponding results from a field to a local ring are extended.
在伽例略变换下，巧妙利用零矢量，给出了任意正交曲线坐标系中质点速度和加速度的矩阵表式方法。
Under Galilean transformations, expressions of Veloeities and accelerations in vertical curve Coordinates are derived by the ingenious use of Zero Vector and means of matrix.
OD矩阵表计算模块允许用户自定义输出各车型矩阵、客车矩阵、货车矩阵、绝对数矩阵、标准车矩阵。
Od matrix calculation module allows users to output every defined motor types matrix, bus matrix, truck matrix, absolute number matrix and standard motor type matrix.
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