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一种针对欠定时延混合模型的混合矩阵估计算法 被引量:1
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作者 聂伟 赵耀东 +2 位作者 曹旭源 张圣鹋 白尕太 《信息技术》 2020年第2期89-92,102,共5页
文中主要研究了欠定时延混合模型下盲源分离的混合矩阵估计问题,提出了一种针对复数混合矩阵估计的新算法。文中首先介绍了欠定时延混合模型;其次通过利用不同观测信号在时频点处模值的内在关系来检测单源点并筛选出用于聚类的单源点;... 文中主要研究了欠定时延混合模型下盲源分离的混合矩阵估计问题,提出了一种针对复数混合矩阵估计的新算法。文中首先介绍了欠定时延混合模型;其次通过利用不同观测信号在时频点处模值的内在关系来检测单源点并筛选出用于聚类的单源点;最终采用块聚类的方法估计出混合矩阵。公式推导和仿真分析都证明该算法可以估计出欠定时延混合模型下的混合矩阵。与其它算法相比,该算法具有更好的估计性能。 展开更多
关键词 欠定时延混合模型 盲源分离 单源点 混合矩阵
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Exploring the mechanism of Buxue Yimu Pill on hemorrhagic anemia through molecular docking, network pharmacology and experimental validation 被引量:2
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作者 XIONG Yan cao xu-yuan +6 位作者 LIU Bo-Yu DAI Yong-Qi ZHOU Heng-Jun HE Juan-Juan GONG Yun WU Xue-Wen TANG Huai-Bo 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2021年第12期900-911,共12页
Buxue Yimu Pill(BYP) is a classic gynecological medicine in China, which is composed of Angelica sinensis(Oliv.)Diels, Leonurus japonicus Houtt, Astragalus membranaceus(Fisch.) Bunge, Colla corii asini and Citrus reti... Buxue Yimu Pill(BYP) is a classic gynecological medicine in China, which is composed of Angelica sinensis(Oliv.)Diels, Leonurus japonicus Houtt, Astragalus membranaceus(Fisch.) Bunge, Colla corii asini and Citrus reticulata Blanco. It has been widely used in clinical therapy with the function of enriching Blood, nourishing Qi, and removing blood stasis. The current study was designed to determine the bioactive molecules and therapeutic mechanism of BYP against hemorrhagic anemia. Herein, GC-MS and UPLC/Q-TOF-MS/MS were employed to identify the chemical compounds from BYP. The genecards database(https://www.genecards.org/) was used to obtain the potential target proteins related to hemorrhagic anemia. Autodock/Vina was adopted to evaluate the binding ability of protein receptors and chemical ligands. Gene ontology and KEGG pathway enrichment analysis were conducted using the Cluster Profiler. As a result, a total of 62 candidate molecules were identified and 152 targets related to hemorrhagic anemia were obtained. Furthermore, 34 active molecules and 140 targets were obtained through the virtual screening experiment. The data of molecular-target(M-T), target-pathway(T-P), and molecular-target-pathway(M-T-P) network suggested that 32 active molecules enhanced hematopoiesis and activated the immune system by regulating 57 important targets. Pharmacological experiments showed that BYP significantly increased the counts of RBC, HGB, and HCT, and significantly down-regulated the expression of EPO, IL-6, CSF3,NOS2, VEGFA, PDGFRB, and TGFB1. The results also showed that leonurine, leonuriside B, leosibiricin, ononin, rutin, astragaloside I, riligustilide and levistolide A, were the active molecules closely related to enriching Blood. In conclusion, based on molecular docking, network pharmacology and validation experiment results, the enriching blood effect of BYP on hemorrhagic anemia may be associated with hematopoiesis, anti-inflammation, and immunity enhancement. 展开更多
关键词 Buxue Yimu Pill Hemorrhagic anemia GC-MS UPLC/Q-TOF-MS/MS Molecular docking Network pharmacology Experimental pharmacology
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