The two basic modes of mathematical model-behavior mode and state variable mode, along with the isomorphic and homomorphic relation between models and real system are described.

系统数学模型的基本模式：行为模式和状态变量模式以及在状态变量模式下的同构与同态系统；

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Based on wavelet domain Hidden Markov model, a novel speckle suppression method for medical ultrasound images is presented which combines Bayesian estimation and homomorphic filtering.

在此基于小波域隐马尔可夫树模型，将贝叶斯估计和同态滤波思想有机结合，提出一种新的医学超声图像去噪方法。

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By means of the feedback linearization procedure of differential geometry, an equivalent, fully controllable and linear model was derived via a homomorphic transformation for the AMT clutch system.

进一步应用基于微分几何的反馈线性化方法，将原非线性系统等价为完全可控型线性化模型。

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