摘要
考虑到脑电源的时谐性和头的电容效应,在电准静态近似下,建立了时谐等效电流偶极子模型;给出了其在均匀无限介质中和均匀介质球中的电位表达式;并正向计算了脑电源在非均匀各向同性三层同心介质球壳中的电位分布。最后讨论了时谐性和电容率对电位分布的影响。理论计算结果表明时谐性和电容率对电位分布确实有影响。
A model of EEG source is set up as a time-harmonic equivalent current dipole model which deals with the problem concerning the capacitance effect. The expressions of potential distribution in homogeneous infinite dielectric and homogeneous dielectric sphere on the electroquasistatic condition is given and the potential distribution in a three-layer inhomogeneous isotropic concentric sphere produced by the model is computed. The effects about potential distribution by time-harmonic character and permittivity are discussed. The theoretical calculation shows that potential distribution is effected by time-harmonic character and permittivity.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第1期134-137,共4页
Journal of University of Electronic Science and Technology of China
基金
贵州省自然科学基金(20052005)
关键词
介质球
电准静态
电容率
时谐等效电流偶板子
时谐因子
dielectric sphere
electroquasistatic
permittivity
time-harmonic equivalent current dipole
time-harmonic factor
