Underwater Target Identification Based on the Methods of Bearing and Cross-spectrum
基于方位走向法和互谱法的水中目标识别
Target Dimension Recognition Based on Short Time Cross-Spectrum by Using Splitting Beam Array
短时互谱法目标尺度识别技术研究
Identifying multiple targets by a single vector hydrophone based on the cross-spectrum goniometry
单矢量水听器基于互谱测向的多目标分辨
The first and second moment, and the probability density function ( PDF) of cross spectrum estimation are proposed.
给出了互谱估计一、二阶矩和一维概率密度函数。
According to the principle of the two microphone cross spectrum method for determining sound intensity and the collocation of measurement system, the cause of the error in measuring the cross spectrum sound intensity and the main factors influencing the measurement accuracy were discussed.
从双传声器互谱法测量声强的原理及测量系统的配置出发，分析讨论了互谱声强测量中误差产生的原因及其影响声强测量精度的主要因素；
The cross spectrum expression of energy flow is deduced when two linear accelerometers are arrayed to measure energy flow.
推导了利用两点线性加速度传感器测量能量流的互谱表达式。
This article expatiates a cross spectrum directional theory based on split beam and studies a highlight model of a underwater target.
本文阐述了基于波束分裂的互谱法定向理论，给出了水下体目标的亮点模型。
Then it is developed into two channel signal. Due to introducing the cross spectrum, the new algorithm could reject the influence of color noise.
还将算法扩展到双通道的情况中，由于互相关函数的引入，该算法能够较好的抑制色噪声。
The spectrum configurations of A-TIG welding arc are analyzed by bit-by-bit testing the cross-spectrum distribution of arc spectrum during A-TIG welding.
逐点测试了活性化TIG焊（A-TIG）电弧光谱的频域及空间分布，分析了A-TIG电弧光谱的构成。
Then the cross-spectrum density matrix between the motions and waves is obtained and the time history of motions of barge in random seas is simulated.
由此频率响应矩阵求得各运动间的互谱密度矩阵并模拟驳船在随机海浪中的运动时历变化。
Based on the theory of spectrum analysis, the chatter character of machine tool and a series of experiments, analyses the cross spectrum characteristics of various chatter signals during the transient from stable cutting to chattering.
从频谱分析理论和机床颤振的特性出发，在大量试验基础上分析了车削加工系统从平稳切削，经过渡过程到颤振中各种颤振信号之间的互谱特性。
In order to obtain the equivalent sound source center of a propeller rotating noise for noise control, the investigation is concerned with the theory based on a cross-spectrum method and the experiment based on time average and space average.
为了得到用于噪声控制的螺旋桨旋转噪声的等价声源中心，研究涉及到互谱分析法的理论以及时间平均和空间平均的实验技术。这是一种工程方法。
Abstract: Applying the wavenumber frequency transfer function to describe the whole system including the elastic cylindrical shell and the fluid loading, a general expression of the cross spectrum of the interior noise induced by the TBL ( Turbulent Boundary Layer) pressure fluctuations is derived.
用波数-频率谱传递函数描述包括粘弹性圆柱壳和流体负荷在内的整个系统，导出了TBL（湍流边界层）压力起伏激励下管内噪声场互谱函数的一般表示式。
In recent years, the technique that NARMAX theory is first used to identify system and then harmonic probing method to find frequency response functions is applied to some extent in auto-control field. This technique is able to overcome shortcomings of cross spectrum method.
近年来，在自动控制领域用非线性系统的NARMAX模型理论先确定系统，然后再应用谐波探测法求得系统的频率响应函数的方法得到了一定应用，这种方法能够避免交叉谱方法的缺陷。
For model dynamic performance, the Theil inequality method is applied to carry out qualitative analysis in the time domain, or the cross spectrum estimation method is provided to have quantitative analysis in the frequency domain after taking sequence stable processing of the Simulation output and test results.
模型动态性能验证，可在时域采用Theit不等式法进行定性分析，也可对仿真输出和试验结果序列平稳化处理后，采用交叉谱估计的方法在频域内进行定量分析。
