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→高斯噪声迭代系统基于SVD的粗粒化策略进阶版
<math>
<math>
\tilde{\Sigma}=\tilde{U}\tilde{S}\tilde{U}^T
\tilde{\Sigma}=\tilde{U}\tilde{S}\tilde{U}^T
</math>
</math>
</blockquote>
</blockquote>
<blockquote>
<blockquote>
<math>
<math>
\tilde{U}=(\tilde{U}_{1},\tilde{U}_{2}),\tilde{U}_{1}\in\mathcal{R}^{2n\times r_{\epsilon 0}}, \tilde{U}_{2}\in\mathcal{R}^{2n\times (2n-r_{\epsilon 0})}
\tilde{U}=(\tilde{U}_{1},\tilde{U}_{2}),\tilde{U}_{1}\in\mathcal{R}^{2n\times r_{\epsilon}}, \tilde{U}_{2}\in\mathcal{R}^{2n\times (2n-r_{\epsilon})}
</math>
</math>
</blockquote>
</blockquote>