将子结构法和双倒易边界元法联合应用于预测具有三维复杂流存在时管道和消声器的四极参数与传递损失，阐述其基本原理与数值过程。
A substructure method and a dual reciprocity boundary element method (DRBEM) are applied to calculate four-pole parameters and transmission loss of ducts and silencers with complex flow.
为提高灵敏度和线性，该加速度计采用静电力反馈闭环控制方式，检测与处理电路采用高精度双极线性电路工艺进行了工艺流片。
To improve sensitivity and linearity, feedback loop was adopted with electrostatic in detection and managing circuit, which is fabricated with high precision bipolar linear circuit technology.
此时，存在明显的双极电场，而双极扩散流基本上是离子扩散的量级。
The ambipolar electric field is important and the ambipolar diffusion flux is of the same order of the ion diffusion level.
此时，存在明显的双极电场，而双极扩散流基本上是离子扩散的量级。
The ambipolar electric field is important and the ambipolar diffusion flux is of the same order of the ion diffusion level.
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