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→高斯噪声迭代系统基于SVD的粗粒化策略进阶版
<blockquote>
<blockquote>
<math>
<math>
\tilde{\tilde{U}}_{1}=\tilde{U}_{11}+\tilde{U}_{12}
\tilde{U}=\begin{pmatrix}
\tilde{U}_{11} \\
\tilde{U}_{12}} \\
\end{pmatrix}, \tilde{U}_{11},\tilde{U}_{11}\in\mathcal{R}^{n\times (2n-r_{\epsilon})}
</math>
</blockquote>
<blockquote>
<math>
\tilde{\tilde{U}}_{1}=\tilde{U}_{11}+\tilde{U}_{12}\in\mathcal{R}^{n\times (2n-r_{\epsilon})}
</math>
</math>
</blockquote>
</blockquote>