Returns the dimension whose zero-based position within the cube is specified by a numeric expression.

返回这样的维度，该维度在多维数据集中的以零为基的位置是由数值表达式指定的。

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The matrix approach is used to establish each branch's position and pose transformation relation, and a numeric method to solve the platform's error is presented, which is tested by an instance.

这里采用矩阵法建立了转台各个支路的位姿变换关系，提出了求解转台误差的数值方法，通过实例对该方法进行了验证。

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