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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。
- 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。
- 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。
- 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。
- 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。
- 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;
- The vented front discs are large for the size of the car, and the rear drums have wide linings. 那前面通风的制动盘对这辆小汽车而言是相对大的,而且后面的鼓刹有宽的衬里。
- 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;
- one-dimension selected line spectra 一维选择线谱
- The flood cut a wide swath in this area. 洪水席卷了这一地区,满目一片疮痍。
- 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 paper has a wide readership. 该报拥有广泛的读者。
- We sell a wide range of ales and stouts. 我们出售种类繁多的浓啤酒和黑啤酒。
- There's a wide spectrum of opinions on this problem. 对这个问题的说法众说纷纭,莫衷一是。
- There are wide assortments of gifts to choose from. 那儿有各式各样的礼品可供选择。
- The Asiatic plains are very wide. 亚洲的平原非常广阔。
- A detection method Of DEMON signal line spectrum 一种DEMON信号线谱识别方法