抗压强度作为混凝土的一个重要指标,受到多种因素的影响.该文提出了一种使用EDEM软件的数值方法,通过考虑水泥水化程度随时间的变化来预测不同养护龄期的抗压强度.采用Hertze-Mindlin with bonding模型来描述硬化混凝土的本构关系.建立...抗压强度作为混凝土的一个重要指标,受到多种因素的影响.该文提出了一种使用EDEM软件的数值方法,通过考虑水泥水化程度随时间的变化来预测不同养护龄期的抗压强度.采用Hertze-Mindlin with bonding模型来描述硬化混凝土的本构关系.建立了水泥水化度与Hertze-Mindlin with bonding模型接触参数之间的函数关系,接触参数随着水泥水化度的增加而增加,抗压强度随养护时间的增加而提高,水灰比越大抗压强度越低,将不同龄期的C25、C30和C35的模拟抗压强度与试验值进行了比较.抗压强度相对误差均在8%以内,验证了预测模型的有效性,表明该方法可以对不同龄期的混凝土进行数值预测,为准确预测混凝土抗压强度提供了一种可靠的方法.展开更多
Objective:To explore the potential mechanism of action of quercetin in the treatment of diarrhea irritable bowel syndrome(IBS-D).Methods:The potential targets of quercetin were obtained from the TCMSP,SwissTar-getPred...Objective:To explore the potential mechanism of action of quercetin in the treatment of diarrhea irritable bowel syndrome(IBS-D).Methods:The potential targets of quercetin were obtained from the TCMSP,SwissTar-getPrediction,and BATMAN-TCM databases.The targets of IBS-D were obtained by searching the GeneCards database with"diarrhea irritable bowel syndrome"as the keyword,and the targets of quercetin and IBS-D were intersected.The PPI network was constructed by Cytoscape 3.7.1 software.The intersected targets were imported into the DAVID database for GO functional analysis and KEGG pathway enrichment analysis.The binding ability of quercetin to the core targets was observed using molecular docking.Based on this,we established an IBS-D rat model,administered quercetin for intervention,and experimentally validated the network pharmacology prediction results by HE staining and ELISA assay.Results:Network pharmacology analysis showed that TP53,TNF-α,AKT1,VEGF-A,IL-6 factors and MAPK,PI3K-Akt signaling pathway as the core targets and pathways of quercetin for the treatment of IBS-D.The results of animal experiments revealed that quercetin could inhibit the secretion of TP53,TNF-α,AKT1,VEGF-A,IL-1βand IL-6,reduce the inflammatory response and improve IBS-D.Conclusion:Quercetin could protect colon tissue by regulating the expression of TP53,TNF-α,AKT1,VEGF-A,IL-1βand IL-6,thereby treating IBS-D.展开更多
文摘抗压强度作为混凝土的一个重要指标,受到多种因素的影响.该文提出了一种使用EDEM软件的数值方法,通过考虑水泥水化程度随时间的变化来预测不同养护龄期的抗压强度.采用Hertze-Mindlin with bonding模型来描述硬化混凝土的本构关系.建立了水泥水化度与Hertze-Mindlin with bonding模型接触参数之间的函数关系,接触参数随着水泥水化度的增加而增加,抗压强度随养护时间的增加而提高,水灰比越大抗压强度越低,将不同龄期的C25、C30和C35的模拟抗压强度与试验值进行了比较.抗压强度相对误差均在8%以内,验证了预测模型的有效性,表明该方法可以对不同龄期的混凝土进行数值预测,为准确预测混凝土抗压强度提供了一种可靠的方法.
基金National Natural Science Foundation of China(No.82160890)Guangxi Health Appropriate Technology Development and Application Project(No.GZSY23-21)+1 种基金Graduate Education Innovation Project,Guangxi University of Traditional Chinese Medicine(No.YCSW2023383)Research Program of Guangxi University of Traditional Chinese Medicine(No.2019MS016)。
文摘Objective:To explore the potential mechanism of action of quercetin in the treatment of diarrhea irritable bowel syndrome(IBS-D).Methods:The potential targets of quercetin were obtained from the TCMSP,SwissTar-getPrediction,and BATMAN-TCM databases.The targets of IBS-D were obtained by searching the GeneCards database with"diarrhea irritable bowel syndrome"as the keyword,and the targets of quercetin and IBS-D were intersected.The PPI network was constructed by Cytoscape 3.7.1 software.The intersected targets were imported into the DAVID database for GO functional analysis and KEGG pathway enrichment analysis.The binding ability of quercetin to the core targets was observed using molecular docking.Based on this,we established an IBS-D rat model,administered quercetin for intervention,and experimentally validated the network pharmacology prediction results by HE staining and ELISA assay.Results:Network pharmacology analysis showed that TP53,TNF-α,AKT1,VEGF-A,IL-6 factors and MAPK,PI3K-Akt signaling pathway as the core targets and pathways of quercetin for the treatment of IBS-D.The results of animal experiments revealed that quercetin could inhibit the secretion of TP53,TNF-α,AKT1,VEGF-A,IL-1βand IL-6,reduce the inflammatory response and improve IBS-D.Conclusion:Quercetin could protect colon tissue by regulating the expression of TP53,TNF-α,AKT1,VEGF-A,IL-1βand IL-6,thereby treating IBS-D.