摘要
应用自回归（ＡＲ）模型方法，对正常肺胸系统与支气管一气管系统进行了建模分析，研究了上述两系统的时变幅频特性，实验结果表明：正常肺胸系统有一个共振峰，其共振峰频率随时间变化，系统可建模为一稳定的６阶线性ＡＲ滤波器，正常支气管一气管系统有２～５个共振峰，其系统可模拟为一稳定的１４阶线性ＡＲ滤波器，ＡＲ建模方法是肺胸系统分析的有效方法。
In this paper , the normal lung-thorax system (LTS)and normal bronchi-trachea system(BTS)are modeled and analysed by using autoregressive(AR)model method. The time-vary-ing magnitude-frequency characteristics of LTS and BTS are observed. The experimental re-sults show that LTS has one formant whose frequency is changing in time. LTS can be mod-eled as a staNe 6th-order linear AR filter, on the other hand, BTS has 2～5 formants andcan be simulated as a stable 14th-order linear AR filter. AR modeling method is an effectivemean of respiratory system analysis.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1995年第1期59-65,共7页
Journal of Xi'an Jiaotong University
关键词
肺胸系统
频率特性
共振峰
自回归模型
lung-thorax system frequency characteristics formant autoregressive model
