line spectrum

1. A method for extracting the low frequency line spectrum of helicopter acoustic signals is presented based on the one and half spectrum estimation.
   提出一种基于（一又二分之一）维谱估计的直升机声信号低频线谱特征提取方法。
2. Implementation and Optimization of the Line Spectrum Frequency Quantization Based on DSP
   AMR-WB编码中线谱频率量化的DSP优化与实现
3. Effectively Detecting Line Spectrum of Ship-Radiated Noise Using DT-CWT Statistical Model
   基于DT-CWT统计模型的舰船噪声信号中线谱信号检测研究
4. The study of a line spectrum enhancement method based on orthogonal wavelet transform
   基于正交小波分解的线谱增强算法研究
5. Waveform simulation of low frequency line spectrum on propeller cavitation noise Specification for marine metallic propeller
   舰船螺旋桨空化噪声低频线谱波形仿真GB/T12916-1991船用金属螺旋桨技术条件
6. Research of the Denoising the line spectrum signal of the Ship-Radiated Noise Based on the Wavelet Inter-scale Dependency No matter it was in T 1 or T 2, the signal of sacks was identical with cerebrospinal fluid in same layer.
   基于信号小波系数层间关系的线谱信号去噪研究t1和T2加权像与同一层面脑脊液信号相同。
7. Research on Technique of Passive Sonar Target Recognition Based on Line Spectrum Feature Extraction
   基于线谱特征提取的被动声纳目标识技术研究
8. The purpose of the research is to investigate the line spectrum nonstationarity of radiated noise produced by moving vessels, and to use the features to improve sonar detection performance and to realize the ranging function.
   研究运动舰船辐射噪声线谱的非平稳性的规律并利用其来提高声呐的检测性能和实现目标测距测深功能是本研究的目的。
9. Nonstationarity analysis of line spectrum and range estimation by spectrum interference
   线谱非平稳性分析和利用干涉谱测距
10. This paper introduces two methods for radiated noise line spectrum extraction based on discrete wavelet transform and for radiated noise modulation spectrum extraction based on multiresolution approximations arithmetic.
    文中主要介绍了基于离散子波变换提取辐射噪声线谱的方法、基于多分辨分解算法提取辐射噪声调制谱的方法；
11. First this paper introduces the principle of ACELP, then the relation between linear prediction ( LP) coefficient and line spectrum pair ( LSP) is provided.
    首先本文介绍了ACELP编码的基本原理，然后给出了线性预测（LP）系数与线谱对（LSP）之间的转化关系。
12. Non-coherence scattering caused by random move of sound source with line spectrum and random ocean sound channels
    线谱声源随机运动和随机海洋信道引起的非相干散射
13. A semi-fragile speech watermarking algorithm based on speech model is researched, which is realized by quantization of line spectrum pair ( LSP) parameters.
    在语音产生模型的基础上研究了一种基于该模型的半脆弱性数字水印算法，通过对语音信号的线谱对（LSP）参数嵌入水印信息来实现。
14. Ship radiated-noise recognition(ⅱ)- stability and uniqueness of line spectrum
    舰船噪声识别（Ⅱ）&线谱稳定性和唯一性
15. A detection method Of DEMON signal line spectrum
    一种DEMON信号线谱识别方法
16. On the basis of above research, math model of line spectrum for radiated noise is established by the periodical signal. Line spectrum frequency of different rotational speed underwater vehicles can be predicted by applying the model.
    在此基础上，以周期信号为模型建立了航行体辐射噪声线谱数学模型，并应用该模型对不同转速航行体辐射噪声线谱频率进行了预测。
17. Extraction of shaft frequency based on the DEMON line spectrum
    基于DEMON线谱的轴频提取方法研究
18. The auto identification and separation of line spectrum of sonar signal
    声纳信号中线谱的自动识别与分离
19. Hybrid Quantization Line Spectrum Pair Vocoder For various emission bands the coefficient b has different values.
    混合量化线谱对声码器对于不同的谱线，系数b是不同的。
20. The application research of adaptive line spectrum enhancer on active sonar
    自适应线谱增强器在主动声纳中的应用研究
21. The line spectrum nonstationarity comes from 3 aspects: instability of sound source, propagation path and relative movements of sound source and receiver.
    线谱的非平稳性有3个方面来源，线谱声源的不稳定、传输途径和目标与接收点的相对运动。
22. It is shown that propeller cavitation noise is composed of continual spectrum and separable line spectrum.
    结果表明，螺旋桨空泡噪声由连续谱和离散线谱组成。
23. 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。
24. It indicates there are two kinds of characteristics containing the information of range and speed, the Doppler line spectrum and the interference pattern.
    文章指出了其中有二组特征蕴藏的目标距离和速度信息，线谱和干涉条纹。
25. Using the method of harmonic reconstruction based on non-parameter bispectrum estimation, the line spectrum components of ship-radiated noise can be reconstructed precisely.
    因此，本文利用了一种基于非参数法双谱分析的谐波信号精确重构方法对舰船辐射噪声的线谱分量进行了重构；
26. Line Spectrum Pair is another form with LPC, belong to the frequency parameter.
    线谱对是线性预测参数的另一种表示形式，同样属于频域参数，可以用来估计基本的语音特性。
27. Effects of amplitude fluctuations of signal and background noise on line spectrum detector performance
    信号和背景噪声的幅度起伏对线谱检测器性能的影响
28. The noise spectrum induced by single aperture perforation plate has the approximate line spectrum ingredient.
    单一孔的穿孔板产生的噪声谱具有大致线状谱成份，较容易产生哨声。
29. Optical filters are spectrum instruments which are used to intercept the spectrum band with a certain width from the continuous spectrum or extract some radiation lines from line spectrum.
    光学滤光片是从连续的光谱中提取一定宽度的光谱带或在离散的线状光谱中提取某些辐射的光学元件。
30. The relative intensity of the line spectrum in the total spectrum is expressed quantificationally by defining an intensity ratio of the line spectrum to the continuous spectrum.
    通过定义线谱与连续谱的光强比，定量地表征了线谱在总光谱中的相对强度，并给出了驱动声压对于OH自由基3条谱线光强比的影响。

noun

1. a spectrum in which energy is concentrated at particular wavelengths