A improved cone-shaped model is given in order to improve the old cone-shaped model.
A improved cone-shaped model is given in order to improve the old cone-shaped model.
摘要提出了一种融入方向关系矩阵模型思想的改进型锥形模型。
A improved cone-shaped model is given in order to improve the old cone-shaped model.
摘要提出了一种融入方向关系矩阵模型思想的改进型锥形模型。