有限维管束 Closed bundle ; [植] closed vascular bundle ; definite vascular bundle
有限射束源 finite beam source
有限棒束 finite rod bundle
有限管束 finite tube bundle
有限的结束点 The finite end points
有限差分光束传播法 FDBPM
用有限差分光束传播法 Finite Difference Beam Propagation Method
有限尺寸铅笔束 FSPB
有限差分光束传输法 Finite difference beam propagation method
有限差分波束传输法 FD-BPM
资源束虽然有用，但作用有限。
有限差分束传播法则能够准确地模拟波导的性能。
The finite difference beam propagation method(FD-BPM) can simulate the performance of the waveguide accurately.
在众多的波导模拟工具中变分有效折射率法和有限差分束传播法都是实用性非常强的。
Variational-Effective index method and Finite difference beam propagation method(FD-BPM) are both practicable waveguide simulation tools.
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