A double focusing, non spatial dispersion magnet design has been suggested to substitute the achromatic principle for improving the beam characteristics on target of the medical accelerator.
本文提出以双聚焦、无空间色散的设计原则，来代替常用的全消色差设计原则，使医用电子直线加速器的偏转磁铁能够具有更好的特性。
Then the article discusses forward modeling based on acoustic wave higher difference, then analyzes numerical dispersion including time and spatial dispersion and presents its stability conditions.
接着，简要介绍了基于声波高阶差分的多次波正演模拟方法，分析了这种方法的数值频散问题，包括时间和空间频散，同时给出了它的稳定性条件。
A numerical model for investigating the localization of surface exciton polaritons in the presence of random roughness and spatial dispersion was established.
在存在着随机粗糙和空间色散时，利用了一个数字模型研究表面激子极化激元的定域化。
A numerical model for investigating the localization of surface exciton polaritons in the presence of random roughness and spatial dispersion was established.
在存在着随机粗糙和空间色散时，利用了一个数字模型研究表面激子极化激元的定域化。
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