舰船噪声调制包络谱是水下目标识别的重要特征。
The target classifier is an important composition of the underwater target recognition system.
通过对实际舰船噪声目标进行识别，识别效果比较满意。
Finally Use this system to identify real ship noise. The result is acceptable when identifying.
DEMON分析是舰船噪声目标识别的重要分析手段之一。
DEMON analysis is one of the most important means for underwater target recognition.
本文研究海洋环境噪声与舰船噪声的频间相关与群延迟特性。
The characteristics of frequency correlation and group time delay of ambient noise and ship radiated noise in the sea are studied.
随着舰船噪声的降低，对被动声呐的检测性能提出了巨大的挑战。
Along with the decreasing noise radiation of underwater vessels, it appears a big challenge to the passive sonar.
籍助对舰船噪声通过特性信号的时频分析，得到了若干典型舰船的噪声源强度谱纵向分布特性。
The longitudinal distributions of source intensity spectrum of several typical ships is given on the basis of time frequency analysis of the passage signature of ship radiated noises.
利用希尔伯特变换求舰船噪声的包络谱，对舰船噪声的包络信号进行分析，并提取了四个特征量。
With Hilbert transform, the envelop spectrum of the signals radiated from ships was obtained. The ship radiated noise is analyzed and its 4 features are extracted from the envelop spectrum.
为提取舰船噪声听觉特征，应用被动长波模型对舰船噪声进行了分析，得到噪声信号的二维时空分布。
A passive long wave cochlea model is applied to extract audial feature of naval vessel radiation noise.
而处于舰船噪声低频区的线谱具有很高的强度和稳定度，这一事实为估计目标运动要素提供了新的思路。
But the line located in the low frequency of ship noise spectrum has high intensity and stability. This fact provides new idea in estimating target motion parameters.
通过理论推导和样本分析，研究了舰船噪声调制谱谐波族特征蕴含的结构特性和应用于识别的相关问题。
By theoretical derivation and sample analysis, the structure law of ship radiated-noise demodulation -spectrum harmonic clan feature and correlative questions are investigated.
利用目标线谱与自噪声线谱在时间域和空间域上的差异，采用时空联合手段研究舰船噪声中目标线谱的提取方法。
This paper deals with extraction of spectral lines of underwater targets in background noise using a space-time integral method.
对舰船辐射噪声的模拟。
利用真实舰船航行辐射噪声作为目标及干扰，正态分布高斯白噪声作为噪声背景，在基元等间隔线阵上实现了最佳空间滤波器。
The realization of OSF in the case of real target radiated noise in the background of Gaussian white noise for equal spaced line array is illustrated.
为了研究目标舰船辐射噪声对声纳作用距离产生的影响，用蒙特卡洛方法对目标航速进行模拟。
In order to research the affection of ship's radiate noise on sonar detecting range, this paper simulates the ship's velocity by Monte Carlo method.
分析典型舰船辐射噪声的产生机理、特性、构成。
The mechanism of production, property and constitution for ship radiating noise are analysed.
舰船辐射噪声信号的特征提取技术因其在水下装备中具有重要的应用价值，一直是国内外研究的热点和难点。
The technique of feature extraction of ship-radiated noise is of importance to underwater equipment, and it is a hotspot and difficult area in the national and international research.
为了解决舰船结构的振动噪声预报及其控制问题，以能量密度为变量，获得了薄板结构受激励产生弯曲振动时的能量密度控制方程，并得到了控制方程的有限元解。
To better forecast and control the structural vibration and noise of naval vessels and other kind of ships, the energy finite element method was introduced.
海天背景下舰船目标红外图像的目标背景对比度低，噪声大。
Infrared images for warship targets in sky -sea background have some characteristics, such as the low target-to-background contrast, great noise and so on.
本文分析了舰船辐射噪声中节奏的物理根源，指出了常见的节奏类型。
The sources of ship-radiated noise rhythms are analysed, the frequent types of rhythms are classified in this paper.
给出了一种能够模拟具有指定功率谱特征的舰船辐射噪声的方法。
A method of simulating vessel's radiated noise with specified power spectrum is presented.
首先讨论了舰船辐射噪声的产生机理、构成和频率特性，指出螺旋桨噪声的振幅存在周期性调制。
First, the generation mechanism, components and frequency characteristic of radiated noise of naval ships are studied. There exists periodical modulation for the amplitude of propeller noise.
齿轮箱是舰船动力装置的一个重要部件，易出现故障，也是舰船振动与噪声的主要根源之一。
Gearbox is an important part of warship power plant which is easy to lead to faults, it is also one of the important sources of warship vibration and noise.
中频噪声一直是舰船系统有待解决的难题。
The intermediate frequency noise is always a difficult problem of the ship system that is to be solved.
通过水池联调和海上实测验证，表明：模拟器除了能够发射CW、LFM等常用的水声信号外，还能够模拟产生具有特定特征的舰船辐射噪声。
Experiments on the test pool and open sea have proved that this simulator could not only transmit acoustic signals like CW and LFM, but also generate ship radiated noise with specific characteristics.
由此可利用信号双谱，提取舰船辐射噪声信号的非高斯成份。
Therefore, bispectrum is used to extract the non gaussian ingredients from the noise signals of ships.
针对这一情况，本文提出了一种使用四阶累积量对角切片检测舰船辐射噪声的方法。
Contrapose this phenomenon, a new method based on fourth-order cumulants diagonal slice for detecting ship-radiated noise is presented.
研究了基于听觉模型的水声信号特征提取方法，提取了舰船辐射噪声的听觉特征。
The approach of how to extract underwater acoustic signal with auditory model is studied and the auditory features of ship-radiated noise is extracted.
根据舰船水压信号与海浪噪声的特点，用慢跟踪lms算法对波浪噪声进行白化处理。
According to the characteristic difference between ship hydraulic pressure signal and wave noise signal, this paper presents a slow trace LMS algorithm to whiten wave noise signal.
针对舰船组合导航中的有色噪声系统滤波融合问题，本文将现有的能处理白噪声的顺序滤波算法推广到有色噪声系统情形。
For colored noise system filtering fusion of vessel integrated navigation, the paper promote present sequential filtering algorithm from deal with white noise system to colored noise.
探讨舰船螺旋桨空泡噪声指数衰减型随机脉冲序列的理论模型。
The present paper deals with theoretical model of random sequence of exponential attenuate acoustic pulses caused by ship propeller cavitation noise.
应用推荐