Results 91 to 100 of about 275 (124)

全氟己酮对棒—板短空气间隙工频击穿特性的影响

Gaoya dianqi
全氟己酮是一种新型高沸点清洁灭火剂，满足阀厅灭火喷射距离远、介质绝缘性好和无污染的要求。文中研究了雾径约719.0 μm的全氟己酮雾滴和气态全氟己酮对棒—板短空气间隙放电特性的影响。4 cm棒—板间隙下，流量由0.27 L/min上升至1.94 L/min时，全氟己酮雾滴—空气两相体间隙击穿场强由11.85 kV/cm上升至14.35 kV/cm，最高较空气间隙提升1.69倍；当气态全氟己酮体积分数由0.44%增加至10.25%，全氟己酮气体—空气的击穿场强由10.50 kV/cm上升至18.68 kV/
邓捷, 陈宝辉, 陆佳政, 梁平, 吴传平, 朱鸿章, 方针   +6 more
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负弯矩区采用RPBL连接的钢-混凝土组合梁高温下截面塑性铰演化研究

Jianzhu Gangjiegou Jinzhan
为探究高温环境下采用RPBL（Rubber-Ring Perfobond Leiste）连接件的钢-混凝土组合梁在负弯矩区塑性铰的形成机理，本文建立了该类组合梁在火灾条件下的数值模型。通过分析组合梁支座截面应力的演化过程，研究了不同温度条件下负弯矩区的变形特征。此外，重点考察了底部钢梁翼缘宽厚比、腹板高厚比以及混凝土板厚度与截面总高度之比等关键参数对塑性铰形成的影响。研究结果表明：在高温作用下，负弯矩区RPBL连接件组合梁的混凝土板内钢筋及下部钢梁的纵向应力随温度升高而逐渐衰减。此外，底部钢梁翼缘宽厚比、
陈喜芝, 周焕廷, 阮健, 陈建平
doaj  

[Temporal changes of chronic postsurgical pain in mice: the regulatory role of CX3CL1 in the dorsal root ganglion]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhao B, Lü Z, Ji D, Tian S, Wu Y, Li X, Zhou J, Fang J, Liang Y.   +8 more
europepmc   +1 more source

基于组件法的栓焊节点高温力学模型

Jianzhu Gangjiegou Jinzhan
钢框架梁柱连接节点的高温力学性能是影响火灾下钢框架结构抗连续倒塌性能的关键因素之一。基于组件法，将栓焊节点分解为翼缘拉压组件、连接板螺栓孔承压组件、螺栓受剪组件、梁腹板螺栓孔承压组件和螺栓滑移组件等基本组件，并分别对各组件的等效弹簧力学模型开展理论推导，最终建立了栓焊节点高温组件模型。基于已开展的栓焊节点抗火试验，构建了节点整体受力分析杆系模型，并通过对比有限元结果和试验结果，验证了组件模型的有效性和准确性。研究结果表明 ...
李永梅, 丁润民, 刘美景, 范圣刚   +3 more
doaj  

[Recent advances in external cardiac defibrillation techniques]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2020
Li W, Xie J, Peng L, Wei L, Wang S, Li Y.   +5 more
europepmc   +1 more source

Public perceptions of the role of government and nonstate actors in responding to COVID-19. [PDF]

Risk Hazards Crisis Public Policy, 2021
Sledge D, Thomas HF.
europepmc   +1 more source

[A study on post-traumatic stress disorder classification based on multi-atlas multi-kernel graph convolutional network]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Zhou L, Zhu H, Liu Y, Mo X, Yuan J, Luo C, Zhang J.   +6 more
europepmc   +1 more source

[Neonatal transport for disasters]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2019
Group of Pediatric Disaster, Pediatric Society, Chinese Medical Association, Pediatrics Committee, Medical Association of Chinese People′s Liberation Army.   +4 more
europepmc   +1 more source

[Multicenter retrospect analysis of early clinical features and analysis of risk factors on prognosis of elderly patients with severe burns]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Ma QM, Tang WB, Li XJ, Chang F, Yin X, Chen ZH, Wu GH, Xia CD, Li XL, Wang DY, Chu ZG, Zhang Y, Wang L, Wu CL, Tong YL, Cui P, Guo GH, Zhu ZH, Huang SY, Chang L, Liu R, Liu YJ, Wang YS, Liu XB, Shen T, Zhu F.   +25 more
europepmc   +1 more source

[Disaster response plans in the neonatal intensive care unit]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2017
Shi Y.
europepmc   +1 more source