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Disturbance Dynamics and Its Effects on Carbon in Human-Impacted Mountain Forests in Northwestern Yunnan, China. [PDF]
Ecol EvolIdentifying and quantifying natural and anthropogenic disturbances at fine spatial scales is critical to assess the role of forests in climate change mitigation. Using tree rings, fire scars, satellite imagery, official records, and interviews, we reconstructed historical disturbances and identified fires, logging events, landslides, and icy ...
Cheng Z, Aakala T, Ji C, Larjavaara M.
europepmc +2 more sources
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耐火极限的确定与计算难度大。为简化结构构件在高温承载极限状态时约束钢构件的防火设计，采用有限元数值模拟方法开展了大量参数分析，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。基于经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 ...
朱劭骏 +6 more
doaj
Epidemics and Medical Responses in the Song Dynasty - Exclusion of Shamanistic Treatment and Propagation of Codified Medicine Treatment. [PDF]
Uisahak, 2022 Kim H.
europepmc +1 more source
Gaoya dianqi水喷雾系统是变压器火灾抑制的重要手段。文中针对配备水喷雾系统的变压器室，利用FDS软件对喷雾作用下的变压器室火灾发展进行了数值模拟研究，获得火灾发展过程中的变压器室温度变化和碳烟生成及分布规律。结果表明：对于无喷雾作用的情况，处于燃烧区域的观测点1的最高温度可以达到966℃，之后逐渐下降，最终在500℃附近波动。燃烧产生的碳烟产生后首先聚集于变压器室顶部，然后向四周扩散，最终逐渐弥漫整个变压器室。喷雾的作用主要体现在降低火灾进程中同一时间的热释放速率及温度，但对室内的烟羽流运动影响不大 ...
苏文 +4 more
doaj
[Injury mortality among Chinese aged 5 to 24 years from 1990 to 2019]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2022 Liu YF +5 more
europepmc +1 more source
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 ...
朱劭骏 +6 more
doaj
[Advances in early repair and reconstruction of severe limb injuries]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiXu Y.
europepmc +1 more source
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 ...
朱劭骏 +6 more
doaj
[Electroacupuncture improves post-traumatic stress disorder in rats by alleviating hippocampal mitochondrial injury <i>via</i> regulating Bcl-2/Bax/caspase-3 signaling]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoMa D, Cheng J, Zhang H, Liu G, Song K.
europepmc +1 more source
Software for prioritizing conservation actions based on probabilistic information. [PDF]
Conserv Biol, 2021 Watts M +4 more
europepmc +1 more source