王中德(1989)推广了矩阵直积，给出了矩阵第二类直积和第三类直积运算，并将此运算应用于正交变换的构造。
The matrix direct product is generalized and two kinds of direct products are given by Wang Zhongde (1989). These two kinds of direct products are applied to the construction of orthogonal transforms.
以东营凹陷南斜坡王58地区沙四上浊积扇为例，分析了湖平面变化对浊积扇发育的控制作用。
Taking the Upper Sha-4 turbidite fan in Wang-58 block as an example, we explain how lake level fluctuations control the development of turbidite fan.
以东营凹陷南斜坡王58地区沙四上浊积扇为例，分析了湖平面变化对浊积扇发育的控制作用。
Taking the Upper Sha-4 turbidite fan in Wang-58 block as an example, we explain how lake level fluctuations control the development of turbidite fan.
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