Results 91 to 100 of about 476 (150)
Microwave drying kinetic characteristics of yellow phosphorus-like materials [PDF]
Yellow phosphorus is an important industrial raw material used in pharmaceuticals, food, pesticides, the military, and the chemical industry, significantly impacting the economy.
hang LI, jiayu HE, lei XU, yongfen SUN
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Progress in phase field research of dead lithium in lithium batteries [PDF]
In recent years, the increase in people’s demand for energy has led to the development of secondary batteries. Because of its high theoretical capacity and low electrochemical potential, lithium metal has gradually become the preferred negative electrode
Huiyi CHEN, Huiyu LIU, Jing LIU, Shu LI
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Nonlinear guided wave evaluation method for detecting incipient performance degradation in polyethylene plate/shell structure [PDF]
ObjectiveQuantitative characterization of the extent of incipient damage in polyethylene plate/shell structures is crucial for ensuring the safe operation and preventive maintenance of oil and gas facilities.
Gang LIU +6 more
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Microscopic fracture characterization and permeability evolutionary patterns of granites under cyclic thermal shock [PDF]
ObjectiveThis study aims to reveal the microscopic damage characteristics and permeability evolutionary patterns of high-temperature granite reservoirs fractured under cyclic thermal shock produced by low-temperature fluids like drilling fluids and ...
Chengcheng REN +5 more
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基于三维电磁-热-流耦合方法的换流变阀侧干式套管插接结构过热性故障研究
Dianci bileiqi, 2019 换流变压器阀侧干式套管采用表带触指作为导体的连接和载流结构,随着输送功率的提高,套管载流量不断提升,插接结构的接触电阻发热将影响套管的可靠运行。针对±500kV换流变阀侧干式套管,通过三维有限元分析耦合电磁、热、流等多物理场,考虑热传导、热对流和热辐射的影响,计算分析了插接结构发热情况下套管的温度场分布以及接触电阻不同程度劣化对套管热场分布的影响。结果表明:接触电阻劣化会引起插接结构局部过热,最终导致环氧芯体与导电管界面温度上升,影响套管安全稳定运行。同时 ...
张晋寅 +6 more
doaj
2019年第一届电力装备绝缘与放电计算学国际研讨会第二轮会议通知
Gaoya dianqi, 2019 尊敬的各位专家学者:能源结构转型和可再生能源大规模开发利用促使电网系统开始进行新一轮的重大变革,特别是以多端柔性直流输配电技术为代表的新技术的快速发展,不断催生出大量新型的电力装备。同时,由于电力装备的工作场景复杂,往往涉及绝缘与放电中的多物理场耦合过程,还涉及到电磁场、放电等离子体等复杂现象与材料的相互作用,导致目前电力装备的研发与设计周期较长,研发成本较高。能否获得更为准确的计算方法,以缩短电力装备的设计研发周期、降低研发成本 ...
doaj
Gaoya dianqi磁开关具有高重频、长寿命和高平均功率等优点，能够实现脉冲前沿的压缩，已广泛应用于脉冲功率系统。目前磁开关的设计是采用伏秒积分方程确定磁芯结构体积以及绕组的匝数，设计时的精度不高。通过测量铁基纳米晶磁芯的脉冲磁化特性，据此使用多物理场仿真软件Comsol建立了考虑磁芯饱和过程的磁开关场路耦合模型，通过100 kV级的高压脉冲压缩实验，验证了仿真模型的准确性与有效性。利用磁开关仿真模型分析了磁芯的饱和时间以及杂散参数对磁开关输出波形的影响，完成了磁芯饱和时间以及减小磁开关杂散参数的优化设计 ...
江进波 +5 more
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[Advances in Nanozyme-Aptamer Systems for the Detection of Foodborne Pathogens]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanLiang H, Jia S, Zhan Z, Cai Y, Niu X.
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Gaoya dianqi为了研究带电污秽颗粒对绝缘子表面积污、电场分布的影响及空气域电晕放电现象，以FXBW-35/70绝缘子为研究对象，采用多物理场耦合有限元软件Comsol Multiphysics搭建了AC-DC、湍流、带电颗粒相互作用及颗粒运动的耦合风洞模型，进行了带电颗粒对绝缘子表面积污、电场和空气域电晕放电分布研究。结果表明：风速越大，迎风区积污速度快于其他区面；粒径增大时，迎风面积污严重，背风区积污很小，侧风区基本无变化；染污中迎风区伞裙表面的电位和电场畸变最为严重，背风区次之，染污后伞裙表面电位、电场有所缓和 ...
李成学, 吕邦欢
doaj
[Research progress on flexible wearable sensors for health monitoring]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiChen X, Xu G.
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