Results 1 to 10 of about 3,552 (153)
New dimension in vortex electro-magnetic wave transmission with orbital angular momentum [PDF]
, 2022 Purpose:The vortex Electro-Magnetic (EM) wave transmission system with Orbital Angular Momentum (OAM), which is the potential key technology in future mobile communications,is easily confused with the traditional Multiple-Input Multiple-Output (MIMO ...
Chao ZHANG, Yuanhe WANG
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Effect of Pulsed Electric Field Treatment on N-Hydroxyacetylneuraminic Acid Content and Eating Quality of Pork [PDF]
, 2023 This study investigated how to reduce the content of N-hydroxyacetylneuraminic acid (Neu5Gc) in pork. By using Neu5Gc standard solution, porcine submandibular gland mucin (PSM) solution, meat pieces and minced meat as experimental subjects, and high ...
LIU Chuxin, LOU Aihua, WU Yanyang, HE Enqi, ZHENG Wanting, HE Rongxin, SHEN Qingwu
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Dianci bileiqi, 2022 中国铁路接触网腕臂绝缘子冬季面临“雪闪”问题，研究多种积雪条件下，对平、斜安装腕臂绝缘子的电场特性影响，为绝缘子选型及优化提供理论依据。以QBG-25型棒式瓷绝缘子为研究对象，建立有限元电场模型，分析温度、积雪厚度、融雪覆冰厚度及污秽类型对绝缘子电场特性的影响。仿真结果表明：当温度低于0℃时，绝缘子电场强度随温度的降低先增大后减小，在-2℃时电场强度达到峰值；积雪厚度对电场强度影响呈现先增长后减小的变化趋势，各个伞裙电场强度与伞裙表面积雪形态有关，表面积雪程度严重但未完全覆盖时，电场强度畸变最严重 ...
李刚, 李彦哲, 李宝学
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Gaoya dianqi, 2022 输电线路运行时导线表面的电场强度是影响导线覆冰及其电晕放电过程的重要因素，但现有文献的研究对象多为交流输电线路。为适应中国直流输电线路的建设浪潮，文中在电晕笼中采用人工带电模拟覆冰的方法研究了覆冰电场强度对导线雨凇覆冰形态以及电晕损失特性的影响规律。研究表明：覆冰电场强度对导线雨淞覆冰形态具有显著的影响，覆冰时导线表面电场强度越高，形成的雨淞覆冰导线的覆冰重量和冰凌长度越小、冰凌间距越大、覆冰厚度呈先增大后减小的规律。高覆冰电场强度下形成的雨淞覆冰导线的电晕损失更小，此外 ...
张海兵 +4 more
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Gaoya dianqi, 2023 针对GIS隔离开关操作时电子式互感器内部电磁干扰问题，文章首先对电子式互感器进行了结构建模，基于偶极子天线的辐射理论模型对电子式互感内部的三维电磁场分布规律和强度开展分析，最终得到电子式互感器内部不同时刻的电磁场强度及其分布规律：在电磁骚扰产生0.5～2.5μs内电子式互感器内部电场强度较大，在3μs之后电场逐渐减小，在相同频率下，y轴方向电场最强，x轴方向磁场最强。
成林 +6 more
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Gaoya dianqi, 2023 为调控直流稳态与极性反转工况下直流气体绝缘输电线路（HVDC GIL）绝缘子的沿面电场分布，分别设计了稳态梯度（ST-SFGM）绝缘子与极反梯度（PR-SFGM）绝缘子。迭代优化后的SFGM绝缘子涂层电导率恒定，厚度沿r坐标方向减小。电场仿真结果表明，直流稳态工况下均匀绝缘子的最大电场出现在高压三结合点附近，强度为4.25 kV/mm。ST-SFGM绝缘子与PR-SFGM绝缘子的直流电场分布较为均匀，最大电场强度分别下降54.6%与62.1%。极性反转工况下，均匀绝缘子与ST ...
姚航, 杜伯学, 梁虎成, 董佳楠
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Characteristics of electric field strengthening between coal-mineral particles under microwave irradiation [PDF]
Both thermal and non-thermal effects induced by microwave radiation can produce a series of effects on coal and rock, and microwave induced discharge is one of the phenomena of microwave non-thermal effects.
Fuqiang YANG +5 more
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Application of novel processing technology in the preparation of antioxidant peptides [PDF]
, 2023 In this review, the mechanism and characteristics of antioxidant peptides prepared by novel processing technologies such as microwave, ohmic heating, subcritical water, ultrasonic wave, high static pressure and pulsed electric field were summarized.
HUI Ting-ting +5 more
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Electromagnetic environment prediction and safety risk analysis of civil communication leakage coaxial cables in subway tunnels [PDF]
This study aimed to address the limitations of traditional electromagnetic numerical calculation methods in large-scale radio frequency (RF) space fields, accurately predict the electric field intensity of wireless communication signals in subway tunnels,
ZHAO Jiqing, ZHOU Wenying
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Study on the formation mechanism of gelation of konjac glucomannan [PDF]
, 2016 利用直流电，在添加CaCl2、MgCl2、FeCl3、钨酸钠的条件下，分别制备了KGM-Ca、KGM-Mg、KGM-Fe、KGM-T凝胶，对获得凝胶后电处理KGM溶胶电极两侧pH进行了测试,并对KGM-T凝胶进行了FTIR、Raman、SEM、XRD、DSC表征。结果表明，正极附近KGM溶胶为酸性，负极一侧KGM溶胶为碱性。SEM表明KGM在粉末状态下，外表呈现规则的微纤维状，KGM分子间有氢键；KGM溶胶冻干后呈现大小孔洞不均匀的支架结构，直流电处理的KGM溶胶冻干后的扫描电镜没有发生明显的变化 ...
王丽霞
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