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Based on the physical causes and spectral characteristics of torpedo radiated noise line spectra, this paper researches on feature extraction of torpedo target . 基于鱼雷辐射噪声的物理特性和线谱特征,探讨了一种鱼雷目标特征提取方法。
The feature of radiated noise line spectra of underwater moving-target was extracted by the united spectra estimation method based on the traditional and modern spectra estimation. 基于经典谱与现代谱估计的联合估计法提取水下目标辐射噪声线谱特征,首先分别估计采集数据的功率谱,得到估算功率谱图;
Estimation Method for Radiated Noise Line Spectra of Underwater Moving-Target 水下运动目标噪声线谱的联合估计方法
Noise line spectra 噪声线谱
ship noise line spectrum 舰船噪声线谱
Extracting line spectrum from ship-radiated noise is a key technique for identification of underwater targets in passive sonar system. 线谱是水中目标辐射噪声中重要的特征信息,在被动声呐系统中,线谱提取是水中目标识别的关键技术。
The proposed NTTALE has the ability to handle undersea ambient noise twice, to enhance the UMT radiated line spectrum feature twice, and to track well time-varying signals. 用水下某目标辐射线谱的实测数据，对该增强器的性能进行了仿真研究。
Simulations show by this method we can precisely estimate time delay for narrow band and line spectrum source in low SNR. 通过计算仿真结果证明这种方法对低信噪比下窄带和单频信号具有较高时延估计精度。
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。
Of the gas. Since different gas has different set of lines, we can tell which kind of gas it is by analyzing the line spectrum. 不同的气体会产生不同的线条,就如人类的指纹,只要分析光谱上的吸收线,便可以知道光波曾经通过的气体成分。
By DEMON we can get more and stabler line spectrum information than by LOFAR, which is to make power spectrum analysis of signal directly. Several demodulation methods are introduced and compared. 通过包络解调技术可获得轴频等调制信息,这就是常用的DEMON谱分析方法。
Dynamic modulated envelops were analyzed by dimensional spectrum and modulated line spectrums achieved. 然后，利用小波变换求其功率谱从而得到辐射噪声的调制包络；
A loud noise from the street diverted my attention. 街上一阵喧闹声转移了我的注意力。
The noise awoke her from her revery. 这声音把我她从沉思中惊醒。
one-dimension selected line spectra 一维选择线谱
That noise is driving me frantic. 那种噪音真要把我弄疯了。
The thick walls deadened the noise from the street. 这道厚墙隔绝了街上的噪音。
A noise abatement notice is served on the club. 向俱乐部发停止大声喧哗的通知。
Some sources emit only certain wavelengths and produce an emission spectrum of Bright lines with dark spaces Between. Such line spectra are characteristic of the elements that emit the radiation. 有些光源只发射某些波长,产生的光谱是一些亮线,亮线之间则是黑的。这样的线状光谱是发射这些辐射的元素的特征。
The noise of traffic grows louder and louder. 交通的噪音变得愈来愈大。