| 1. | A new method for feature extraction in ship noise
基于多重分形的舰船噪声特征提取 |
| 2. | Study on target recognition based on simulation model of ship radiated - noise
基于舰船噪声仿真模型的目标识别研究 |
| 3. | Object ' s through signature simulation based on power spectrum density estimation
基于功率谱估计的舰船噪声特征提取及声场通过特性仿真 |
| 4. | A new method of line - spectrum extraction of ship radiated - noise based on part imitate was proposed in this paper
摘要提出了一种基于分段拟合的提取舰船噪声信号功率谱中线谱特征的方法。 |
| 5. | 2 ) the ship - radiated noise is studied by means of hos that includes bi - spectrum and tri - spectrum on the basis of analyzing the properties of the noise . then some features are extracted from bi - spectrum and tri - spectrum
在对舰船辐射噪声深入分析的基础上，利用双谱、三谱对舰船辐射噪声进行了研究，指出了应用高阶统计量的双谱、三谱分析舰船噪声的优越性。 |
| 6. | The results show that the self - adaptive filter can be used to detect line spectrum , the wavelet transform and the fourier transform can be used to detect the ship noise in modulating the anisotropic noise field
结果表明：自适应滤波对于各向异性噪声场中的线谱检测有良好的效果；而小波变换和短时傅里叶变换对各向异性噪声场中的舰船噪声调制信号检测有良好的效果。 |
| 7. | In this paper , many features of ship ' s radiated noise are extracted by the means of techniques in modern signal process , and the theory of information fusion is used for calculating basic belief assignment and identification and classification of targets
本文应用现代信号处理技术的多种手段主要研究了舰船噪声的多种特征信息提取，应用信息融合理论重点研究了可信度分配、目标识别分类的信息融合实现等技术。 |
| 8. | It can be learned by analyzing the ship radiated noise signals using nonlinear methods that the ship radiated noise signals are n ' t rigid fractal signals , but there are positive maximum lyapunov exponents , this indicates that the ship radiated noise signals are nonlinear
通过对舰船辐射噪声进行混沌特征分析，结果表明，舰船噪声不具有严格分形性，但具有正的最大lyapunov指数存在，这说明舰船噪声信号中有非线性成分存在。 |
| 9. | The ship radiated noise is analyzed and its 4 features are extracted from the envelop spectrum . the envelope of ship noise waveform can be demodulated utilizing hilbert transform , and the spectrum components with line rotation frequency of propeller shaft are extracted effectively by bispectrum , 1 ( 1 / 2 ) spectrum and 2 ( 1 / 2 ) spectrum analysis
对于通过希尔伯特变换解出的舰船辐射噪声包络信号进行高阶统计量分析，有效地提取出了舰船噪声的双谱、 11 / 2维谱、 21 / 2维谱等方面的特征。 |
