Jianzhu Gangjiegou Jinzhan, 2019 当火灾中钢框架柱不均匀受火时,会在截面和高度方向产生温度梯度。现行规范给出了火灾中钢构件升温的计算公式,但这些公式均是基于温度沿构件高度和截面均匀分布的假设。采用有限元方法研究了火灾中两相邻面受火钢柱的截面温度场,火灾场景采用ISO834标准升温曲线,钢柱采用非膨胀型防火涂料保护。对于所研究的两相邻面受火钢柱,沿截面宽度和高度方向均存在温度梯度。基于参数分析结果,对欧洲规范EN 1993-1-2中钢构件升温计算公式进行了修正,来计算两相邻面受火钢柱截面各部分的升温曲线。
夏金环, 王培军, 周吉学
doaj
The Intersexual Differences of Sexual Dimorphism,Feeding Habits and Locomotor Performance at Different Temperatures of Southern Grass Lizard(Takydromus sexlineatus) in Zhaoqing,China [PDF]
, 2014 通过测量头、尾、体和胃检,研究肇庆南草蜥TAkydrOMuS SEXlInEATuS个体发育过程中两性异形和食性差异。南草蜥成体个体两性大小无显著差异,雄性头部显著大于雌性,两性头部大小异形可能是受到性选择压力的结果。雌雄个体食物生态位重叠度较高,两性生态位差异微弱,食性差异与两性头部异形无明显相关性。通过设计13种不同的环境温度,研究体温变化对南草蜥两性个体运动能力表现的影响。结果显示环境温度通过影响体温而影响南草蜥的运动表现,两性个体疾跑速均具有在低体温范围内随体温升高而加快 ...
刘文华 +4 more
core
Impact Characteristics of Dual-Objective Control Strategy on Temperature Control in Direct-Cooling System and Energy Flow in Electric Vehicles [PDF]
The thermal management system of electric vehicles has become a key research focus for enhancing cabin comfort and battery performance. To address the different temperature response characteristics of cabin and power battery, this study proposes a direct
CAO Yong +10 more
core
Gaoya dianqi, 2017 针对开关柜中真空断路器梅花触头处温升问题,基于记忆合金材料的温度形变功能,在梅花触头上安装记忆合金压片,提高梅花触头的工作性能。测量不同温度时梅花触头处的接触电阻,利用多物理场耦合分析软件COMSOL Multiphysics对开关柜的温度场进行仿真分析,并进行了试验验证。仿真结果与试验结果表明:断路器梅花触头处使用记忆合金压片其温升明显低于使用普通压片时的温升,说明记忆合金压片有助于降低梅花触头温升,提高开关柜运行的安全可靠性。
黄勐哲, 陈丽安
doaj
Gaoya dianqi, 2007 以一种高电压真空断路器模型为研究对象,对影响真空断路器温升的散热表面对流换热系数、动静触头接触点半径、接触点位置以及导电杆的半径4种因素进行了仿真研究。研究结果表明,在考虑散热表面辐射和不考虑辐射两种情况下,动、静触头接触处的温度差别在5%以内,而考虑散热表面的辐射后,接线端子的温度下降了14%。真空断路器温升随着动静触头接触点半径的增大迅速降低而与接触点位置无关,但当接触点半径增大至2 mm以后,温升降低趋势已不明显。真空断路器温升随着导电杆半径的增大而降低,其中触头接触处温度降低的趋势最为显著 ...
余小玲 +4 more
doaj
[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]
Se PuLi YJ.
europepmc +1 more source
[Bifunctional biomaterials: An innovative strategy for synergistic bone tumor therapy and bone regeneration]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiFeng W, Chang B, Wang C, Fan B.
europepmc +1 more source
[A Case Report of Successful Control of Refractory Tumor Fever in Lung Adenocarcinoma with Interleukin-6 Antibody Tocilizumab]. [PDF]
Zhongguo Fei Ai Za ZhiLi Y, Li C, Li B.
europepmc +1 more source
[Assessment on data processing methods for nontarget identification of per- and polyfluoroalkyl substances using liquid chromatography-high-resolution mass spectrometry]. [PDF]
Se PuZhang BX +5 more
europepmc +1 more source
[Diabetic Charcot neuroarthropathy initially misdiagnosed as rheumatoid arthritis and gout: A case report]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanGu J, Li X, Zhao J, Mu R.
europepmc +1 more source