考虑束-离子通道边界上等离子体电子可能发生的扰动，导出了TM模本征方程的理论式。

Considering the disturbance of the plasma electrons at the beam-ion channel boundary, the eigen-equation of TM mode has been derived.

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研究了束传播算法(BPM)中简单透明边界条件(STBC)和完全透明边界条件(CTBC)两种边界处理算法对计算结果精度的影响。

It studied simple transparent boundary condition (STBC) and complete transparent boundary condition (CTBC) used in beam propagation method (BPM) and their effects on calculation accuracy.

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对51例房间隔缺损（ASD）患者术前进行彩色多普勒速度图（CDV）和彩色多普勒速度能量图（CCD）检查，对房水平分流的方向、分流束的边界连续性及彩色充填进行观察对比分析。

To exlore the dignostic validation of CCD on atrium level shunt and compare it with CDV, 51 patients of atrial septal defect( ASD) received CDV and CCD examination before operation.

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