Results 11 to 20 of about 1,446 (153)
基于控制体—迎风有限元法的变压器绕组二维流体场—温度场耦合计算方法研究
Gaoya dianqi, 2021 针对电力变压器二维流体场和温度场的耦合问题,文中采用了基于控制体有限元法和迎风有限元法的流体场—温度场耦合计算方法。该耦合方法基于三角形网格,使用控制体有限元法计算绕组油流区域的速度场,应用流线迎风有限元法求解整体场域的温度分布。在速度场计算中引入速度提升方法解决了流体场仿真时出口边界出现的回流流动问题,并在温度场计算时提出了适用于线性三角形单元的流线迎风稳定参数取值方法,从而解决了温度场仿真时的数值振荡问题。应用所提方法计算分析了油浸式变压器绕组二维模型的油流及温度分布 ...
刘刚 +5 more
doaj
Devices of Graphene Synthesized by Laser Chemical Vapor Deposition and Research on the Key Technologies [PDF]
, 2015 基于石墨烯优异的电子、机械、热学、光学性能以及广阔的应用前景，自2004年被发现以来迅速成为材料学与物理学领域的研究热门。目前，制备石墨烯的方法有很多，但是如何实现石墨烯的快速生长、生长区域的可控性、微区生长以及非转移生长一直是石墨烯在电子器件上应用必须解决的问题。通过对石墨烯多种制备方法的比较，我们发现激光化学气相沉积法（LaserChemicalVaporDeposition,LCVD）是最有可能实现这一要求的方法，本文也将采用该方法进行石墨烯的制备 ...
陈永庆
core
Heat and mass transfer of Dioscorea opposita Thunb. cv. Tiegun slices during hot⁃air drying process [PDF]
ObjectiveThis study aimed to investigate the mass transfer of Dioscorea opposita Thunb. cv. Tiegun slices, the heat transfer of the drying space and yam slices.
LI Yu +4 more
core +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT High‐power piezoelectric ceramics which have a wide operating temperature range are essential for sensor and actuator applications in extreme conditions. However, their development is fundamentally hindered by the inherent trade‐off among key parameters (TC, d33, Qm).
Rui Yan +10 more
wiley +1 more source
research on improving the efficiency of laser lift-off technique [PDF]
, 2014 本论文主要通过研究激光作用下GaN的温度场分布情况来研究如何提高激光剥离效率。结合一维热传导模型和GaN受热分解过程在理论上分析了激光剥离时GaN的温度场分布情况以及影响激光剥离效率的参数，并利用COMSOL软件建立二维模型分析了激光作用下GaN的温度场分布，以此为指导设计实验，细致地研究了不同条件下的激光剥离情况。所获得的的主要成果如下： （1）通过分析一维热传导模型和GaN分解的热力学过程，发现在激光剥离过程中，衬底温度、激光能量密度、脉冲宽度和脉冲频率对GaN内温度场分布有着重要的影响 ...
林飞
core
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Thermodynamic prediction‐driven phase‐field kinetic simulation, with experimental verification, is utilized to explore the high‐performance cobalt–nickel based (CoNi‐based) superalloys. The roles of aluminum (Al) in microstructural evolution and precipitation kinetics of ordered L12‐γ′ strengthened Co–Ni–xAl superalloys are revealed. The alloy
Kun‐Ning Niu +6 more
wiley +1 more source
Gaoya dianqi, 2023 全封闭组合电器设备作为一种当今现场广为使用的电气设备，常因导体接触不良等故障，导致其温度不断上升，从而引发事故发生。文中对GIS中盆式绝缘子导体热点分布情况进行分析，将荧光光纤温度传感器植入盆式绝缘子内部，直接测量导体温度。并对内置光纤传感系统的电场分布和加入光纤系统后的电场分布进行了分析并通过实验验证，明确使用光纤传感系统的安全性。并通过GIS温升试验对比光纤测温与内置热电偶测温，说明光纤测温的有效性。
马金财, 刘刚, 何龙, 赵洪波
doaj
Simulation of temperature field of graphene substrate fabricated by laser chemical vapor deposition [PDF]
, 2015 为了分析激光化学气相沉积制备石墨烯过程中催化剂基底的静态和动态温度场分布与各个实验参量之间的关系,采用基于AnSyS软件建立有限元分析模型和加载532nM激光热源模型的方法,取得了不同实验参量影响下基底温度场分布和达到反应温度所需时间的数据。结果表明,在基底材料属性、激光功率大小、基底面积尺寸、聚焦光斑直径、反应气体流量的影响下,基底静态温度场的分布与达到反应温度所需时间均不同,可作为制备高质量石墨烯实验的参考依据。采用波长为532nM、功率为3W、聚焦光斑直径为50μM、移动速率为1MM ...
张建寰, 张陈涛, 陈永庆
core
Blast furnace layer lining erosion problem based on inverse the heat conduction model [PDF]
, 2017 A blast furnace lining mathematical model was established based on the inverse heat transfer problem. After determining the boundary conditions of the model, this inverse heat transfer problem is divided into three problems which are the direct problem ...
SU Fu-yong, WEN Zhi
core +1 more source
International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source