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.
本文提出利用反演理论对GIS数据进行质量评价，对超定、适定、欠定等问题分别求取相应解，为GIS数据质量的研究提出了新的思路。
In this paper, I put forward inversion theory assessing GIS data quality, gave respondence solution for different problem. This is a new clue to research for GIS data quality.
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."
由于该项研究必须基于一定的计算机基础之上，因此对于本人来说研究必然要受到一定的专业的限制，如有欠为妥当之处，敬请专家批评指正。
Because of the study must be based on a computer basis, therefore, for I must be a professional research restrictions, if properly owed to the Department, if experts criticized me.
现行制度中的有关规定有尚欠合理或不太规范之处，这可能给实务操作带来一定程度的混乱，理应引起我们的高度重视。
Some regulations under current accounting system are lack of reasonable and normal. It's likely to bring confusions in accounting practices to some extent. We should attach importance to these issues.
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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