阵列幅相误差会显著降低麦克风阵列的声源定位性能,因此对麦克风阵列的幅度和相位进行良好校准至关重要。文章针对近场麦克风阵列,引入三维多重信号分类(Multiple Signal Classification,MUSIC)近场算法,对基于特征结构的阵列幅度和相...阵列幅相误差会显著降低麦克风阵列的声源定位性能,因此对麦克风阵列的幅度和相位进行良好校准至关重要。文章针对近场麦克风阵列,引入三维多重信号分类(Multiple Signal Classification,MUSIC)近场算法,对基于特征结构的阵列幅度和相位校正方法进行改进。改进后的校正方法不再局限于特定阵列的拓扑结构,可以实现近场校正,具有较高的定位估计精度。展开更多
目的探讨治疗痉挛型脑瘫有效中药的用药规律。方法检索中国知网、万方、维普、Pubmed、Web of science、Co-chrane library数据库中药治疗痉挛型脑瘫的文献,采用EXCEL表格分析中医证候,药物的服用方法,药物的频次、四气五味及归经,观察...目的探讨治疗痉挛型脑瘫有效中药的用药规律。方法检索中国知网、万方、维普、Pubmed、Web of science、Co-chrane library数据库中药治疗痉挛型脑瘫的文献,采用EXCEL表格分析中医证候,药物的服用方法,药物的频次、四气五味及归经,观察的指标;SPSS Modeler18.0软件进行组方规律分析、SPSS Statistics 24进行药物的因子分析和聚类分析探讨痉挛型脑瘫的药物运用规律。结果痉挛型脑瘫虚证为肝脾肾、气血虚,实证为肝风、瘀血、气滞;用药频数前4位:伸筋草、当归、牛膝、红花,用药性温,味为甘、辛、苦,归肝、肾、脾经,补虚药、祛风湿药最多。关联分析中透骨草-木瓜、鸡血藤、牛膝组合支持度、置信度最高。核心用药透骨草、牛膝、伸筋草、鸡血藤。提取6个公因子。聚类分析得出当归、赤芍、杜仲、木瓜、川芎、甘草、黄芪;红花、白芍、鸡血藤、伸筋草、透骨草、牛膝、桂枝、丹参、桑枝、艾叶两个方子。中药主要以外用熏蒸为主,主要改善肌张力及运动功能。结论痉挛型脑瘫病机为肝脾肾气血虚兼肝风内动,气滞血瘀;治疗以补益肝肾、健脾胃,益气补血扶助正气,以祛风活血通络祛邪。展开更多
目的:利用网络药理学方法从整体观念探讨中药复方伸膝汤治疗膝关节骨性关节炎(Knee Osteoarthritis,KOA)的作用机制。方法:通过BATMAN-TCM数据库,对伸膝汤所含活性成分进行筛选并预测作用靶点,利用GeneCards、OMIM和CTD数据库检索KOA相...目的:利用网络药理学方法从整体观念探讨中药复方伸膝汤治疗膝关节骨性关节炎(Knee Osteoarthritis,KOA)的作用机制。方法:通过BATMAN-TCM数据库,对伸膝汤所含活性成分进行筛选并预测作用靶点,利用GeneCards、OMIM和CTD数据库检索KOA相关基因,利用韦恩图筛选伸膝汤中活性成分治疗KOA的作用靶点。利用Cytoscape软件构建活性成分-作用靶点网络图。利用String数据库绘制伸膝汤蛋白互作网络,分析计算出最重要的5个蛋白。利用Metascape数据库对靶点进行基因本体(Gene Ontology,GO)及京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)富集分析。结果:伸膝汤所含8味中药共筛选出184种活性成分,涉及1491个靶点基因,其中有710个基因与KOA相关。网络分析结果表明,伸膝汤治疗KOA涉及的生物学过程主要包括毒性反应、细胞外刺激反应、激素水平调节等;涉及的分子功能主要包括辅因子结合、羧酸结合、维生素结合等。其作用机制可能与HIF-1信号通路、PI3K-AKT信号通路、cAMP信号通路、钙离子信号通路、TNF信号通路、碳代谢、凋亡、流体剪切应力与动脉粥样硬化、非酒精性脂肪肝等信号通路有关。结论:本研究初步揭示了伸膝汤多靶点整体调节KOA的作用特点,为进一步开展此方治疗KOA作用机制的研究提供了新的思路和方法。展开更多
Because of its merits,acrylic resin was chosen to improve the mechanical,conductive and hydrophobic properties.Carbon fiber powders (CF),carbon nanotubes (MWCNT),and nano-TiO_(2) were incorporated into the acrylic res...Because of its merits,acrylic resin was chosen to improve the mechanical,conductive and hydrophobic properties.Carbon fiber powders (CF),carbon nanotubes (MWCNT),and nano-TiO_(2) were incorporated into the acrylic resin to prepare the corona-proof conductive composite coatings.The incorporation of CF and MWCNT may improve the conductivity and mechanical strength of the coatings.However,the addition of nano-TiO_(2) may increase the hydrophobicity of the coatings.Thus,the effects of different additives on the mechanical properties,conductivity,hydrophobicity and heat resistance of the conductive film were studied.The experimental results show that the incorporation of carbon fiber powders and multi walled carbon nanotubes can significantly improve both the conductivity and mechanical properties of the conductive coatings,and the addition of nano titanium dioxide can improve the hydrophobicity of the conductive film.展开更多
文摘阵列幅相误差会显著降低麦克风阵列的声源定位性能,因此对麦克风阵列的幅度和相位进行良好校准至关重要。文章针对近场麦克风阵列,引入三维多重信号分类(Multiple Signal Classification,MUSIC)近场算法,对基于特征结构的阵列幅度和相位校正方法进行改进。改进后的校正方法不再局限于特定阵列的拓扑结构,可以实现近场校正,具有较高的定位估计精度。
文摘目的:利用网络药理学方法从整体观念探讨中药复方伸膝汤治疗膝关节骨性关节炎(Knee Osteoarthritis,KOA)的作用机制。方法:通过BATMAN-TCM数据库,对伸膝汤所含活性成分进行筛选并预测作用靶点,利用GeneCards、OMIM和CTD数据库检索KOA相关基因,利用韦恩图筛选伸膝汤中活性成分治疗KOA的作用靶点。利用Cytoscape软件构建活性成分-作用靶点网络图。利用String数据库绘制伸膝汤蛋白互作网络,分析计算出最重要的5个蛋白。利用Metascape数据库对靶点进行基因本体(Gene Ontology,GO)及京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)富集分析。结果:伸膝汤所含8味中药共筛选出184种活性成分,涉及1491个靶点基因,其中有710个基因与KOA相关。网络分析结果表明,伸膝汤治疗KOA涉及的生物学过程主要包括毒性反应、细胞外刺激反应、激素水平调节等;涉及的分子功能主要包括辅因子结合、羧酸结合、维生素结合等。其作用机制可能与HIF-1信号通路、PI3K-AKT信号通路、cAMP信号通路、钙离子信号通路、TNF信号通路、碳代谢、凋亡、流体剪切应力与动脉粥样硬化、非酒精性脂肪肝等信号通路有关。结论:本研究初步揭示了伸膝汤多靶点整体调节KOA的作用特点,为进一步开展此方治疗KOA作用机制的研究提供了新的思路和方法。
基金Funded by the State Grid Shaanxi Electric Power Company (5226KY17001B)the Natural Science Foundation of Hubei Province (2019CFB787)the State Key Laboratory of New Textile Materials and Advanced Processing Technologies (FZ2020012)。
文摘Because of its merits,acrylic resin was chosen to improve the mechanical,conductive and hydrophobic properties.Carbon fiber powders (CF),carbon nanotubes (MWCNT),and nano-TiO_(2) were incorporated into the acrylic resin to prepare the corona-proof conductive composite coatings.The incorporation of CF and MWCNT may improve the conductivity and mechanical strength of the coatings.However,the addition of nano-TiO_(2) may increase the hydrophobicity of the coatings.Thus,the effects of different additives on the mechanical properties,conductivity,hydrophobicity and heat resistance of the conductive film were studied.The experimental results show that the incorporation of carbon fiber powders and multi walled carbon nanotubes can significantly improve both the conductivity and mechanical properties of the conductive coatings,and the addition of nano titanium dioxide can improve the hydrophobicity of the conductive film.
