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脑磁逆问题的求解是脑磁研究中的一个关键问题,其中对多电流偶极子源参数的推断一般采用非线性全局优化方法,但收敛速率较慢。为提高计算速率,该文采用结合局域优化的遗传算法,既克服了局域优化的局部极小问题,又可以加快收敛速率,基于真实头模型的仿真计算表明该方法是有效的。 相似文献
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Invariant theory and exact solutions of the time-dependent supersymmetric two-level multiphoton Jaynes-Cummings model 下载免费PDF全文
On the basis of the fact that the two-level multiphoton Jaynes-Cummings (TLMJC) model possesses a supersymmetric structure, an invariant is constructed in terms of the supersymmetric generators by working in the sub-Hilbert-space corresponding to a particular eigenvalue of the conserved supersymmetric generators (the time-independent invariant). In this paper, we investigate the invariant-related unitary transformation approach to exact solutions of the time-dependent TLMJC model. 相似文献
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