为了参数的模型具备有效性，他们就必须基于或者被证明为是使用精确的项目数据的。

In order for parametric models to have any validity they must be based on or proven using actual project data.

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基于数学模型，只要模型允许，就可以调整Pianoteq的参数，产生的不仅是新的演奏风格，还能创作新的钢琴音色。

Based on mathematical models, Pianoteq allows parameters to be stretched as long as the model permits, resulting not only in new performance styles but also in new piano sounds.

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在分析已有辐射源信号识别模型的基础上，提出了基于信号参数特征提取的辐射源信号识别模型。

After analyzing the existing radar emitter signal recognition models, this paper presents a radar emitter signal recognition model based on signal parameters extraction.

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