口服液体控释给药系统是一种新型药物传递系统，因其存在物理不稳定性，所以能上市的品种较少。
Oral liquid drug controlled release system (OLCRS) is a new drug delivery system. But only a few has been come into the market due to the physical instability.
另外在加速器物理实验以及在研究各种束流不稳定性的机器研究过程中，都需要频谱测量和频谱分析。
In addition, it required to measure and analyze the beam spectrum while the experiments of accelerator physics and study on the beam instability are made.
利用频响函数识别复频率模态质量存在着严重的数值计算不稳定性，给物理参数的识别造成困难。
The severe numerical instability in complex frequency modal mass identification from frequency response function makes it difficult to identify physical parameters.
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