1) very low frequency component
极低频成分
2) very low frequency(VLF)
极低频成分(VLF)
3) low polarity component
低极性成分
1.
Analysis of low polarity components from Buddleja purdomii;
甘肃醉鱼草低极性成分分析
4) Low-polarity chemical constituents
低极性化学成分
6) extremely low frequency
极低频
1.
The Sommerfield integral expression has been derived for the electromagnetic field in insulating half-space produced by an extremely low frequency,time-harmonic horizontal electric dipole embedded in the first layer with multi conducting medium layers.
推导出分层导电媒质中顶层极低频时谐电偶极子在绝缘介质半空间中产生的电磁场分布的索末非积分表达式;以海床-海水-空气三层模型为例,水平交流电偶极子位于海水中,采用汉克尔变换及快速傅里叶变换,数值计算了空气半空间中的电磁场分布。
2.
The theory for motion-induced noise generation of the extremely low frequency omni-directional anten-na is studied, and formulae for the submarine towed electrode-pair antenna and H-field antenna are represented in the form of the motion-induced noise voltage power spectrum.
通过对极低频拖曳全向接收天线运动感应噪声产生原理的研究,得出了潜艇电极对拖曳天线和磁场天线的运动感应噪声功率谱的表达式,详细指出了天线灵敏度、电缆特性、地磁场等关键因素在影响运动感应噪声方面所起的作用,探讨了减小运动感应噪声的方法,并与实验测得的噪声电压进行比较证实了上述理论。
3.
To discuss the effects of extremely low frequency(ELF)electromagnetic fields(EMF)on intracellular free Ca~(2+)concentration is meaningful for explaining the mechanisms of biological effects of electromagnetic fields,especially for the non-thermal effects of weak ELF-EMF,in terms of cell signal transduction system.
探讨极低频电磁场对胞内游离钙离子浓度([Ca~(2+)]_i)的影响,对于从细胞信号转导的角度来解释生物电磁效应,尤其是弱极低频电磁场(ELF-EMF)非热效应的机制有着重要的意义。
补充资料：“质子-电子偶极-偶极”质子弛豫增强
“质子-电子偶极-偶极”质子弛豫增强
物理学术语。原子核外层中不成对的电子质量小，但磁动性很强，可使局部磁场波动增强，促使氢质子弛豫加快，从而使T1和T2缩短，这种效应即为PEDDPRE。过渡元素和镧系元素大部分在d和f轨道有多个不成对电子，所以其离子往往具有PEDDPRE，可用来作顺磁性对比剂，如钆(Gd)。Gd在外层有7个不成对电子，具有很强的顺磁性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条