在计算T矩阵的方法中，最流行的方法称之为扩展边界法（EBCM），但是它很大的程度上只适合轴对称和近似球形的粒子。
The most prevalent way to calculating T-matrix is the extended boundary condition method (EBCM), which, however, is largely limited to axisymmetric and near-spherical particles.
本文采用离散偶极子近似理论，研究金、银两种金属的球形和棒状纳米粒子的消光光谱。
In this article, the Discrete Dipole Approximation (DDA) was used to calculate the extinction spectra of the gold and silver nanoparticles with the shape of sphere and cylinder.
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