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一种基于数据外插改进的ART迭代算法 被引量:5
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作者 李毅 潘晋孝 《CT理论与应用研究(中英文)》 2011年第1期21-27,共7页
本文针对有限角度的投影数据的CT图像重建问题,提出了一种基于数据外插改进的ART算法。该算法的基本思想是运用已知角度的投影数据来补全未知角度的投影数据,再用ART算法进行图像重建。最后用模拟的投影数据进行了重建图像的数值实验。... 本文针对有限角度的投影数据的CT图像重建问题,提出了一种基于数据外插改进的ART算法。该算法的基本思想是运用已知角度的投影数据来补全未知角度的投影数据,再用ART算法进行图像重建。最后用模拟的投影数据进行了重建图像的数值实验。实验结果表明该算法不但提高了重建图像质量,同时也提高了图像迭代的收敛速度。 展开更多
关键词 有限角度 不完全投影数据 图像重建 达代算法
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Predicting Arabidopsis thaliana Gene Function by Transitiving Co-expression in Shortest-path 被引量:1
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作者 史锋莉 黄继风 +1 位作者 Feng-li Ji-feng 《Agricultural Science & Technology》 CAS 2010年第5期1-4,21,共5页
The present paper predicted the function of unknow genes by analyzing the co-expression data of Arabidopsis thaliana from biological pathway based on the shortest-path algorithm. This paper proposed that transitive co... The present paper predicted the function of unknow genes by analyzing the co-expression data of Arabidopsis thaliana from biological pathway based on the shortest-path algorithm. This paper proposed that transitive co-expression among genes can be used as an important attribute to link genes of the same biological pathway. The genes from the same biological pathway with similar functions are strongly correlated in expression. Moreover,the function of unknown genes can be predicted by the known genes where they are strongly correlated in expression lying on the same shortest-path from the biological pathway. Analyzing the Arabidopsis thaliana from the biological pathway,this study showed that this method can reliably reveal function of the unknown Arabidopsis thaliana genes and the approach of predicting gene function by transitiving co-expression in shortest-path is feasible and effective. 展开更多
关键词 Shortest-path Pathway Co-expression Gene function Arabidopsis thaliana
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CONSTRUCTION OF UNITONS VIA PURELY ALGEBRAIC ALGORITHM 被引量:8
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作者 GU CHAOHAO(C.H.GU) HU HESHENG(H.S.HU)(Institute of Mathematics,Fudan University,Shanghai 200433,China) 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1999年第1期1-6,共6页
A purely algebraic algorithm for constructing unitons is presented. It is shown that all unitons can be constructed by using this algorithm.
关键词 Uniton of U(N) Darboux transformation RENORMALIZATION
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