Gaoya dianqi, 2019 电力系统的运行经验表明,大多数输电线路事故是由雷击输电线路或杆塔引起跳闸所致。经由输电线路杆塔接地体流入大地的雷电流可达数十甚至上百千安,此时接地体周围土壤出现非线性火花放电现象。为了提高输电线路耐雷水平,降低雷击故障率,考虑实际工况下土壤非线性火花放电效应进行杆塔接地体参数计算对降低杆塔接地电阻的优化设计至关重要。文中基于电磁场理论,考虑土壤中的火花效应特性,采用有限元数值计算方法建立了仿真模型,实现了高幅值冲击接地电流下接地体入地散流过程的模拟。研究表明,该仿真模型与试验结果偏差小于10 ...
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[<i>Shenqi Xiezhuo</i> Decoction alleviates renal fibrosis in rats by ameliorating oxidative stress and inflammation through the Rap1/MAPK/FoxO3a signaling pathway]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLu X +6 more
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[Shihu Mixture alleviates diabetic cardiomyopathy in rats by Sirt3-mediated upregulation of myocardial mitochondrial mitophagy pathway]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLin X, He Y, Shi H, Liu J, Hu H.
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[Effects of miR-100-5p on proliferation and apoptosis of acute myeloid leukemia cells and the underlying molecular mechanism]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiFan XR, Yang Y, Sun Y, DU CM.
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[Preclinical Development Process and Prospects of Real-time Fluorescence Quantitative Polymerase Chain Reaction Detection Kits]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanWang C, Li S, Zhang S.
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Jianzhu Gangjiegou Jinzhan火灾下轴心受压约束钢构件的力学响应复杂，所产生的温度内力导致其承载失效的确定与计算难度大。为简化基于结构构件高温承载极限状态的约束钢构件抗火设计方法，采用有限元数值模拟方法开展了大规模参数分析，以确定火灾高温下轴心受压约束钢构件的承载与失效规律。基于试验验证的可靠有限元模型，研究了不同长细比、轴向约束刚度比和初始荷载比等参数对轴心受压约束钢构件火灾响应的影响。结果表明，上述参数均将显著影响约束钢构件的火灾响应，且当长细比较大、轴向约束刚度比较小、初始荷载比较大时 ...
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[Role and mechanism of ubiquitin-specific protease 35 in ferroptosis of rheumatoid arthritis-fibroblast like synoviocytes]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanFeng L, Hong L, Chen Y, Cai X.
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Jianzhu Gangjiegou Jinzhan碳纤维拉索以其轻质和超高的抗拉强度，适用于建筑结构的受拉构件，其应用的推广有助于推进建筑行业的节能减排。国内目前尚未出台碳纤维索结构设计方面的规范和标准，高强度、大吨位的碳纤维索在我国房屋建筑中尚无应用先例。为了推进碳纤维索的研究和应用，在美的全球创新园区项目中，局部应用了2 800 MPa级高强度的碳纤维平行筋索，其中7×139拉索的破断荷载达14 991 kN。本文介绍了项目中碳纤维索的力学性能和承载力确定，碳纤维索结构的抗震计算和防连续倒塌计算。结合碳纤维索的高温力学性能和构造措施 ...
李明菲, 邢佳宇
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[Proteomics analysis of the effect and mechanism of ADSCs on full-thickness skin defects in diabetic rats]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiGu Y, Chen YZ, Wang SY, Song HY, Bai N.
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[Untargeted metabolomics reveals differential serum metabolites and metabolic pathways in patients with primary Sjögren syndrome and thrombocytopenia]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanXiang Z, Yang L, Yang J.
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