子阵列

The paper introduced in detail the development and application of airgun source and made summary of airgun theory and technology mainly from three aspects: developing history of airgun system,theory of airgun and relevant knowledge,and study of airgun array wavelet and developed results of correspondent software.

本文详细介绍了气枪震源的发展与应用，主要从三个方面对气枪震源的理论与技术进行综述：气枪震源系统的发展历程、气枪震源理论及相关知识、气枪阵列子波研究与软件开发成果。

The idea of operation in beam-space and coherent subspace method were introduced into acoustic vector array signal processing.

把声压阵的波束域高分辨算法的思想和相干子空间方法的思想引入到声矢量阵列信号处理，在MichaelZoltowsk提出的矢量阵的数学模型的基础上推导出了声矢量阵波束域宽带聚焦MUSIC算法，并作了计算机仿真研究。

Using covariation concept in array signal processing, the proposed algorithm can obtain clean speech signal subspace by eigendecomposition of the covariation coefficient matrix of speech signal corrupted by impulsive noise.

该算法把阵列信号处理中的协变异应用到语音增强中，对带噪语音信号的协变异系数矩阵进行特征值分解得到纯净语音信号的子空间。

Final, improve of beam-pointing drift with digital delayer at elements or sub-arrays is given.

文章也给出了阵列单元或子阵设置数字延迟器后，扫描波束指向漂移改善的分析结果。

The key problem is to solve the display of four dimensional wavelet transform outputs.

提出光学子波并行处理的实现策略，主要有：阵列器件的组合、空分复用、图象缩放旋转与滤波器多楔多环之间的均衡等，其关键是解决二维输入图象子波变换输出的四维显示问题。

Based on the array signal processing and the eigenstructure decomposition method, the signal subspace and the noise subspace are achieved by reconstructing and decomposing the data matrix collected by the array sensors. By using the orthogonal properties of the two subspaces, the information about the velocities and bearings of spatial moving targets can be exactly obtained.

本文提出一种超分辨的二维谱估计方法，它利用的是阵列处理技术，对天线接收数据进行本征分析，将信号数据张成一个空间并对其进行分解，根据正交原理分割成信号子空间和噪声子空间，构造出噪声本征矢量，利用信号子空间与噪声子空间的正交性，在空间谱上形成极值点，从而达到对方向和速度的二维高分辨率估计。

Nevertheless, in many practical applications such as in low sample support or when the signal statistics are rapidly time-varying, we may not have enough sample to form the sample covariance matrix.

然而，常规的子空间估计方法由于涉及到阵列协方差矩阵的估计及其特征值分解，从而需要较高的计算复杂度。

In the case where the sample covariance matrix is given, we perform the spatially smoothed Lanczos algorithm to fast compute the basis vectors for the signal subspace and the noise subspace.

如果阵列协方差矩阵是已知的，我们采用空间平滑的Lanczos算法快速估计信号子空间和噪声子空间。

For the case where the sample covariance matrix is unknown or the sample support is not sufficient to form the sample covariance matrix, we carry out the spatially smoothed CSA-MSWF to quickly find the signal subspace and the noise subspace.

如果阵列协方差矩阵是未知的，我们采用空间平滑的CSA-MSWF快速计算信号子空间和噪声子空间的基矢量。

They modeled continuous space and time as a four-dimensional array of points--the lattice--and confined the quarks to the points and the gluons to the links between them.

他们用一个四维阵列点——也就是晶格——来模拟连续的空间和时间，把夸克限制在点上、把胶子限制在点之间的连接上。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。