| 陈向东,高翔,陆佶人.舰船辐射噪声的分段自仿射IFS模型[J].声学技术,1999,(1):22~25 |
| 舰船辐射噪声的分段自仿射IFS模型 |
| Self-affine iterated function system model of ship radiated noise |
| 投稿时间：1998-10-27 修订日期：1998-12-15 |
| DOI： |
| 中文关键词: 非线性 分形 自仿射 目标识别 参数提取 |
| 英文关键词: non-linear fractal self-affine target recognition parameter extraction |
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| 摘要点击次数: 1249 |
| 全文下载次数: 1051 |
| 中文摘要: |
| 本文根据舰船辐射噪声具有连续不可导和非平稳的特性,建立了分段自仿射IFS(Iterated Function System迭代函数系统)模型。提取出IFS参数并计算出IFS分形维数。结果表明;1 在一定的压缩比下,由IFS参数所恢复的信号具有较高的信噪比。2 两类不同目标的IFS分形维数具有较好的离散度。本文为水声目标的分类与识别提供了新的特征参数。 |
| 英文摘要: |
| In this paper, the self-affine iterated function system (IFS) model of ship radiated noise is established according to the continuos, non-derivative and non-stationary characteristics of the temporal signal of ship radiated noise. Based on the model. the IFS fractal dimension is extracted. The experiments show that:1.Under certain compression ratio, the reconstructed signal from IFS parameters has the higher SNR value. 2.The fractal dimension of IFS is defferent referring to the two kinds of ship targets. A new characteristic parameter is provided for the classification and recognition of underwater acoustic targets. |
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