查询词典 lag covariance

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

Taking mapping QTL that affect leaf age growth trajectories in rice of a DH population as an example, we used 3 biological meaningful submodels and 2 orders Legendre polynomial to model the mean vector of QTL genotypes and 11 stationary and non-stationary models to fit residual covariance matrix.

以水稻一个DH群体的叶龄性状为例，我们分别用3个具有生物学意义的子模型和2阶Legendre多项式去拟合QTL基因型的均方向量，用13个平稳和非平稳模型去描述剩余协方差的变化。

Second,Principal component analysis is essentially a linear method based on the covariance matrix which reflects the linear dependence.

用能反映非线性结构的四阶累积量函数代替相关函数构造矩阵，对主分量分析方法进行改进。

The problem of D-stable robust covariance control for the delta operator formulated linear uncertain systems based on dynamic output feedback is studied.

研究Delta算子描述的线性不确定系统基于动态输出反馈的D-稳定鲁棒协方差控制问题。

The concise and unified formula for testing any local parameter using F-statistic in covariance analysis is presented.The specific algorithm is also described.

给出了在协方差分析中，对任何局部参数进行检验时使用F-统计量的简明统一表达式，也给出了具体的算法。

In this paper, a new model adaptation using vector Taylor series is presented, which adapts the mean vector and covariance matrix of hidden Markov model.

该文将矢量泰勒级数用于模型自适应，同时对HMM模型的均值向量和协方差矩阵进行变换，使其与实际环境相匹配。

Moreover, it processes only a single snapshot data with no use for the formation of the sample covariance matrix and matrix inversion operation.

同时，它只对单快拍数据进行处理，避免了样本协方差矩阵的构造以及矩阵求逆运算，更适合于实时处理。

Analyzing the inner configuration of the covariance matrix, a new multiple targets DOA tracking algorithm is presented based on a matrix norm minimization technique.

摘要该文分析了协方差矩阵的内部结构，得到了一种具有较低运算量的基于范数最小准则的多目标DOA跟踪算法。

When oversampling factor is 2, the covariance matrix composed of the coefficients of correlation between those samples can be calculated by numerical method.

按Nyquist采样率均匀抽取出的采样点之间相互独立同分布，推广到过采样系数为2时，得到此时由各采样点之间相关系数构成的协方差矩阵，利用数值计算对其进行分析。

Getting out the Eigen values and eigenvectors of the series covariance matrix by the Jacobi algorithm in C language also is discussed in this paper.

本文使用C语言，利用雅可比算法，编写出可快速求出数据因子分析中所要求的矩阵特征值和特征向量的程序。

He studied their excrement for evidence of livestock hair.

他为家畜毛的证据研究他们的粪便。

Loneliness is not grounds for deportation, deportation of the people are not all lonely people.

寂寞也不是放逐的理由，放逐的人也并不都是孤独的人。