首先，综述了图像域中分形编码的特性，然后导出在离散余弦变换(简称DCT)域中仿射变换的伸缩因子和偏移量的对应公式。
We firstly overview the properties of fractal coding in image domain, then we derive the corresponding formula of scaling factor and offset of affine transform in DCT domain.
该算法将配电网中的功率量测变换为电流量测，实现了雅可比矩阵常数化，支路电流实虚部解耦求解。
Power measurements are all transformed to equivalent current measurements that make the Jacobian matrix constant and calculates current real and imaginary part dividualiy.
从群的角度出发，导出了量子力学中的基本力学量与对称变换群中的生成元的关系式。
This paper derives the relationship between the fundamental mechanical quantity in quantum mechanics and the generation element in symmetry transformation group.
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