分别采用LSQR和ART算法对欠定方程组进行了层析成像计算。
LSQR and ART algorithms are applied separately to calculate tomography for the underdetermined system of equation.
针对目前欠定盲分离问题中源数未知，采取“两步法”进行分离源信号。
The two-step approach is often used to separate sources in underdetermined blind separation problem.
基于一种两步稀疏表示的方法，利用随机框架讨论欠定盲源分离的恢复能力。
This paper discusses the recoverability of underdetermined blind source separation(BSS), based on a two-stage sparse representation approach.
利用稀疏分量的直线聚类性，提出了欠定盲源分离中估计混合矩阵的一种方法。
A method of the mixing matrix estimation in underdetermined source separation is proposed, which is based on the linear clustering of sparse component.
非负矩阵分解（NMF）要求分解得到的左矩阵为列满秩，这限制了它在欠定盲分离（UBSS）中的应用。
The decomposed left matrix of Non-negative Matrix Factorization (NMF) is required to be full column rank, which limits of its application to Underdetermined Blind Source Separation (UBSS).
采用弯曲射线追踪算法计算走时，分别用最小二乘QR分解算法与代数重建技术就恰定方程组、超定方程组与欠定方程组进行了成像计算。
LSQR and ART algorithms are applied separately to calculate tomography for the determined system of equation, overdetermined system of equation and underdetermined system of equation.
在书信集的倒数第二封信中，汉芙急切的告诉她前去旅行的朋友：“倘若你碰巧经过查令十字街84号，定代我献上一吻，因我欠他良多。”
In the collection's penultimate entry, Helene Hanff urges a tourist friend, "If you happen to pass by 84, Charing Cross Road, kiss it for me. I owe it so much."
在超欠挖严重的情况下，对隧道的稳定性，尤其是软岩隧道会产生一定的影响。
Tunnel stability, especially in soft rock tunnel, will be affected to certain degree for the enormous over-break or under-break of excavation.
分析了线性载波调制信号经欠采样后，满足一定的条件时可以恢复基带信号波形。
The Study on the Corelation of Modulation Coefficient and Bandwidth with Modulation Signal Parameters in Angular Modulation;
分析了线性载波调制信号经欠采样后，满足一定的条件时可以恢复基带信号波形。
The Study on the Corelation of Modulation Coefficient and Bandwidth with Modulation Signal Parameters in Angular Modulation;
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