基于人眼视觉系统选择平坦块，选择出DCT域中的均匀部分，直接将其直流部分编码输出，不需分形匹配。

Then by selecting out the uniform parts in the DCT domain, the direct current encodes directly without any fractal matching.

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数学模型对SSSC的交流部分和直流部分分别进行分析和数学建模，并通过交、直流侧功率守恒将二者联系在一起。

The AC part and DC part of SSSC were analyzed and modeled separately and combined through power conservation law of both side, so the integrated model of SSSC was made.

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信号子空间中包含目标边界特征，将参数向量中非直流部分投影到信号子空间，得到场景内目标细节信息，然后据此估计场景各点的雷达反射截面（RCS）。

The variable part of the parameter vector is projected onto the signal subspace to identify intrinsic structural features of the scene and estimate the RCS.

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