The mechanism of the produce of target noise, its transmission characteristics in air and several main factors that influence the sound transmission are analyzed.
分析了低空目标声源的产生机理、目标辐射噪声在大气中的传播特性以及影响其传播的几个主要因素。
The system of passive ranging SONAR makes use of the target noise received by the equipment which converts energy from one form to another to estimate the target distance.
被动测距声纳系统是利用换能器基阵接收的目标辐射（噪声）信号来估计目标距离。
The US did begin to engage, but only to make more noise in the negotiations, dampening hopes for a US emissions reduction target.
美国确实开始参与行动了，但是他们只不过在谈判中引起更大的喧哗，因而降低了人们对美国提出减排目标的希望。
The results indicate this method can effectively extract texture feature of gray image target, and has robust to noise and change of target shape.
结果表明，这种特征提取方法能有效地提取灰度图像目标纹理特征，并且对噪音和形状的变化具有强鲁棒性。
Choose the target and the noise that will be removed in two Windows, then extract target with dual-direction scan in each window.
在二值边缘图像中应用双窗口分别选定目标和要去除的噪声，在各窗口中采用双向扫描提取目标特征。
In the thesis, the video echo of the airborne PD radar was simulated. The simulated echoes include the signals of the target, the ground clutter and the noise.
本文研究的雷达视频回波信号模拟与仿真是针对机载下视脉冲多普勒雷达，包括目标信号、地杂波信号和噪声信号的模拟与仿真。
The static crosstalk noise peak and noise width are used to identify crosstalk target.
通过静态串扰噪声的峰值以及噪声宽度信息来识别串扰目标。
Recognition algorithms for small moving target in strong noise based on single feature has a high false alarm. Sometimes the features of target and noise are very alike.
利用单个特征识别强噪声中的弱小运动目标，常因所提取的目标特征与噪声特征易混淆而导致高的虚警率。
TV target tracing system has following features: real-time, image indistinctness on the ground of dynamic tracing and external environmental distortion, high noise background intensity and so on.
电视目标跟踪系统实时性强，由于是动态跟踪和外界环境干扰，所以导致图像不清晰、背景噪声较强。
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.
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。
This is caused by the complexity of underwater target radiated noise and the variety condition of the sea.
这是由于水下目标辐射信号和海洋环境的复杂性、多变性造成的。
Achieving online auto monitoring is our ultimate target of noise monitoring.
我国噪声监测的最终目标是实现在线自动监测。
The infrared image includes several aspects: great-area continuous background, small infrared target, noise and so on.
红外图像中包含了大面积连续的背景、红外小目标以及噪声等几个部分。
Select the camera target, and assign the Noise Position controller to it, instead of the Path Constraint.
选择摄像机目标点，指定噪波控制器给它，替代原先的路径约束。
It has the functions of synchronization pulling off jamming, smart noise jamming and false target jamming, it also can jam Pulse Doppler radar effectively.
它可以实现同步拖引干扰、灵巧噪声干扰和假目标干扰的功能，能够有效的干扰脉冲多普勒雷达。
Proper structure design of the infrasonic monitoring arrays is an effective means to restrain the environment noise and enhance the target infrasonic signal.
次声监测台阵结构的合理设计是抑制环境噪声及增强目标次声信号的一种有效手段。
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.
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。
The clutter is predicted exactly and subtracted from the input signal by RLS adaptive filter, leaving components of the target signal in the residual noise.
通过RLS自适应滤波器，背景杂波分量被准确地预测并从输入信号中去除，从而只剩下目标信号与残留噪声。
Finally, the true target can be accurately detected by removing noise interference based on continuity of moving target in the image sequence.
最后，根据目标像素在序列图像中运动的连续性排除噪声干扰，从而准确地检测出真实目标。
The simulation results show that the proposed method succeeds in detecting low speed target with low false alarm probability in low signal to noise ratio environment.
仿真实验表明，该检测方法能在低信噪比环境中，以低虚警率对低速目标进行有效检测。
Make use of the laser-generated cavitation noise to generate false target based on this property, which is simulation of the cavitation noise generated by submarine propeller.
针对这一特征，考虑利用激光光源在远处水下产生空化噪声作为假目标，用来模拟潜艇螺旋桨产生的空化噪声。
Studies the measurement of low frequency radiation noise from an underwater target by a vector hydrophone, discusses the method of measurement and presents the test results in the sea.
研究利用矢量水听器测量水下目标低频辐射噪声的问题，并给出了测量方法和海上试验结果。
The background is a detected object as the target, and it can't served as a source of noise.
背景与目标一样是作为检测对象考虑的，而不应作为噪声源考虑。
This paper presents a tracking algorithm for maneuvering target when the measurement noise is glint noise.
给出了一种量测噪声为闪烁噪声情况下的模型集交互机动目标跟踪算法。
The target detection reduces the noise, enhances the image's contrast, and extrudes the target from background through making sure of tracking region and dividing target.
其目标检测通过确定跟踪区域、分割目标等步骤先减少噪声影响，使图像对比度增强，把目标从背景中突显出来。
According to the imaging difference of target, background clutter and noise, a moving small target detection method based on spacial high-pass filtering and N-frame track accumulating is presented.
根据目标、背景干扰和噪声在红外序列图像中的差异，提出了一种基于空间高通滤波和时间域上N帧轨迹积累的运动小目标检测方法。
This paper also studies the statistics characteristic of signal, clutter and noise after the system disposal, and generates target data and detecting background noise using the simulated system.
研究了信号及杂波、噪声在信号处理之后的统计特性，并通过仿真系统产生了目标回波数据及检测背景噪声。
Different means are used for different kinds of noise respectively. The edges of target and background are enhanced and the elimination of Gauss noise and pulse noise are reduced.
该算法对红外图像处理过程中不同类型的噪声采用不同的方法滤波，有效地滤除了高斯噪声和脉冲噪声，同时增强了目标和背景中的边缘成分。
The detect ability of space object visible camera is related to the target signals collection capabilities, camera background noise and focal plane array assembly noise.
空间目标可见光相机的探测能力主要与相机自身收集目标信号的能力、相机本身的背景噪声以及探测器组件的噪声水平有关。
The detect ability of space object visible camera is related to the target signals collection capabilities, camera background noise and focal plane array assembly noise.
空间目标可见光相机的探测能力主要与相机自身收集目标信号的能力、相机本身的背景噪声以及探测器组件的噪声水平有关。
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