GH-CONGRUENCE CANONICAL FORM OF QUATERNION MATRIX AND SIMULTANEOUS DIAGONALIZATION OF MATRICES

In this paper,the GH-congruence canonical forms of positive semidefinite and definte inite and definite(need not be self-conjugate)quaternion matrices are given,and a neccessary and sufficientcondition of GH-congruence for two positive semidifinite(definite)quaternion matrices isgiven also.Then simultaneous GH-congruence reduced forms for two self-conjugate matri-ces and some result about the simultaneous GH-congruence diagonalization of quaternionmatrices are obtained.

The Consistency of the Solutions by T-Matrix Method with Canonical Solutions

In this paper, the limitation of T matrix structure is analyzed. It is found that a solution by T matrix method can be transformed to a canonical solution when the boundary of the scatterer tends to the cylindrical form and the scatterer is illuminated by E plane waves. It is concluded that a T matrix is diagonal with the scatter boundary in this limit situation. This is also the best result of numerical solution.

Quasi-Rational Canonical Forms of a Matrix over a Number Field

A matrix is similar to Jordan canonical form over the complex field and the rational canonical form over a number field, respectively. In this paper, we further study the rational canonical form of a matrix over any number field. We firstly discuss the elementary divisors of a matrix over a number field. Then, we give the quasi-rational canonical forms of a matrix by combining Jordan and the rational canonical forms. Finally, we show that a matrix is similar to its quasi-rational canonical forms over a number field.

THE EXISTENCE AND MOMENTS OF CANONICAL BRANCHING CHAIN IN RANDOM ENVIRONMENT

The concepts of branching chain in random environmnet and canonical branching chain in random environment are introduced. Moreover the existence of these chains is proved. Finally the exact formulas of mathematical expectation and variance of branching chain in random environment are also given.

THE CONSTRUCTION OF MULTITYPE CANONICAL MARKOV BRANCHING CHAINS IN RANDOM ENVIRONMENTS

The investigation for branching processes has a long history by their strong physics background, but only a few authors have investigated the branching processes in random environments. First of all, the author introduces the concepts of the multitype canonical Markov branching chain in random environment （CMBCRE） and multitype Markov branching chain in random environment （MBCRE） and proved that CMBCRE must be MBCRE, and any MBCRE must be equivalent to another CMBCRE in distribution. The main results of this article are the construction of CMBCRE and some of its probability properties.

A GROUP REPRESENTATION OF CANONICAL TRANSFORMATION

The mutual relationships between four generating functions F-1(q, Q), F-2(q, P), F-3(p, P), F-4(p, Q) and four kinds of canonical variables q, p, Q, P concerned in Hamilton's canonical transformations, can be got with linear transformations from seven basic formulae. All of them are Legendre's transformation, which are implemented by 32 matrices of 8 x 8 which are homomorphic to D-4 point group of 8 elements with correspondence of 4:1. Transformations and relationships of four state functions G(P, T), H(P, S), U(V, S), F(V, T) and four variables P, V, T, S in thermodynamics, are just the same Lagendre's transformations with the relationships of canonical transformations. The state functions of thermodynamics are summarily founded on experimental results of macroscope measurements, and Hamilton's canonical transformations are theoretical generalization of classical mechanics. Both group represents are the same, and it is to say, their mathematical frames are the same. This generality indicates the thermodynamical transformation is an example of one-dimensional Hamilton's canonical transformation.

A Novel CCA-NMF Whitening Method for Practical Machine Learning Based Underwater Direction of Arrival Estimation

Underwater direction of arrival(DOA)estimation has always been a very challenging theoretical and practical problem.Due to the serious non-stationary,non-linear,and non-Gaussian characteristics,machine learning based DOA estimation methods trained on simulated Gaussian noised array data cannot be directly applied to actual underwater DOA estimation tasks.In order to deal with this problem,environmental data with no target echoes can be employed to analyze the non-Gaussian components.Then,the obtained information about non-Gaussian components can be used to whiten the array data.Based on these considerations,a novel practical sonar array whitening method was proposed.Specifically,based on a weak assumption that the non-Gaussian components in adjacent patches with and without target echoes are almost the same,canonical cor-relation analysis(CCA)and non-negative matrix factorization(NMF)techniques are employed for whitening the array data.With the whitened array data,machine learning based DOA estimation models trained on simulated Gaussian noised datasets can be used to perform underwater DOA estimation tasks.Experimental results illustrated that,using actual underwater datasets for testing with known machine learning based DOA estimation models,accurate and robust DOA estimation performance can be achieved by using the proposed whitening method in different underwater con-ditions.

William E.Roth s第二定理的一个新证明

仅利用矩阵的基本理论建立了四个引理,并且在此基础上对W.E.Roth第二定理给出了新的证明.

Least-Squares Solutions of the Matrix Equation A^TXA=B Over Bisymmetric Matrices and its Optimal Approximation

A real n×n symmetric matrix X=(x_(ij))_(n×n)is called a bisymmetric matrix if x_(ij)=x_(n+1-j,n+1-i).Based on the projection theorem,the canonical correlation de- composition and the generalized singular value decomposition,a method useful for finding the least-squares solutions of the matrix equation A^TXA=B over bisymmetric matrices is proposed.The expression of the least-squares solutions is given.Moreover, in the corresponding solution set,the optimal approximate solution to a given matrix is also derived.A numerical algorithm for finding the optimal approximate solution is also described.

A New Approach for Inverting the Pascal Matrix Plus a Scalar

In this paper,using the Jordan canonical form of the Pascal matrix Pn,we present a new approach for inverting the Pascal matrix plus a scalar Pn+aIn for arbitrary real number a≠1.

The Reflexive Solutions of the Matrix Equations (AX,XB^H )= (C,D^H )

The matrix equations (AX, XBH)=(C, DH) have been widely used in structural design, parameter identification, linear optimal control, and so on. But few researches studied the reflexive solutions. A new approach for the reflexive solutions to the matrix equations was proposed. By applying the canonical correlation decomposition (CCD) of matrix pairs, the necessary and sufficient conditions for the existence and the general expression for the reflexive solutions of the matrix equations (AX, XBH)=(C, DH) were established. In addition, by using the methods of space decomposition, the expression of the optimal approximation solution to a given matrix was derived.

On Least Squares Solutions of Matrix Equation MZN=S

Let be a given Hermitian matrix satisfying . Using the eigenvalue decomposition of , we consider the least squares solutions to the matrix equation , with the constraint .

Hurwitz-Radon矩阵方程的华罗庚链

1947年,华罗庚独立研究了Hurwitz-Radon矩阵方程,遗憾的是由于失误他未能得出完整结果。文章补充完善了华罗庚对于Hurwitz-Radon矩阵方程的求解。遵循华罗庚的思路,所采用的方法是矩阵的相似标准型。得到了华罗庚链,并通过酉化技巧得到其酉版本。

关于矩阵幂的秩不变的充要条件的一个证明

设P为一般数域,A=(aij)n×n为P上的矩阵,R(A)为A的秩,利用矩阵的有理标准形给出了A满足R(A^(2))=R(A)的充分必要条件的一个新的证明.

成分数据典型相关分析的增量算法

成分数据典型相关分析(CCAI)是一种研究多个成分数据变量之间线性相关关系的方法,在经济、管理、地质、化学等多个领域应用广泛。在海量数据背景下,研究如何针对成分数据流展开典型相关建模分析,具有重要的理论意义和实用价值。为此,提出了成分数据典型相关分析的增量方法,通过对增量成分数据的协方差分解,实现对成分数据流典型相关性的精确计算。同时,给出序贯式和并行式2种分块增量算法,可处理多组成分数据的数据流建模问题,序贯式分块增量算法,按照数据流的先后顺序进行计算,并行式分块增量算法可以达到提高计算效率的目的。通过对不同概率分布和样本规模的成分数据流的仿真研究及微博假新闻的实例分析,验证了所提算法相比于传统的非增量算法,在保证计算准确性的前提下,具有提高运算效率的优势。

An equivalence canonical form of a matrix triplet over an arbitrary division ring with applications

We in this paper give a decomposition concerning the general matrix triplet over an arbitrary divisionring F with the same row or column numbers. We also design a practical algorithm for the decomposition of thematrix triplet. As applications, we present necessary and suficient conditions for the existence of the generalsolutions to the system of matrix equations DXA = C1, EXB = C2, F XC = C3 and the matrix equation AXD + BY E + CZF = Gover F. We give the expressions of the general solutions to the system and the matrix equation when thesolvability conditions are satisfied. Moreover, we present numerical examples to illustrate the results of thispaper. We also mention the other applications of the equivalence canonical form, for instance, for the compressionof color images.

矩阵方程的最小二乘{P,Q,k+1}-自反解

Let P∈C^( m×m )and Q∈C^( n×n) be Hermitian and{k+1}-potent matrices,i.e.,P k+1=P=P∗,Qk+1=Q=Q∗,where(·)∗stands for the conjugate transpose of a matrix.A matrix X∈C m×n is called{P,Q,k+1}-reflexive(anti-reflexive)if P XQ=X(P XQ=−X).In this paper,the least squares solution of the matrix equation AXB=C subject to{P,Q,k+1}-reflexive and anti-reflexive constraints are studied by converting into two simpler cases:k=1 and k=2.

8阶上三角幂零矩阵在上三角变换下的Belitskii标准形

通过对算法进行计算机编程,计算8阶上三角幂零矩阵在可逆上三角矩阵变换下的所有402个不可分解标准形,其中333个标准形不含参数,有65个标准形仅含1个参数,有4个标准形含2个参数.

Jordan定理及其应用

Jordan标准形是矩阵论中的重要概念,在代数学中发挥着重要作用.Jordan定理是解决相关数学问题的有力工具,文章通过例子展示其在矩阵分解、矩阵相似、特征值的计算及微分线性方程组的求解等方面的应用.

地市级广播中心播出总控系统信号流详解

近年来,随着网络技术的大力发展,传统广播业务不断走向融合,催生技术系统走向整合,处理的信号不再局限于音频信号,分发的平台也不限于传统的收音机,而是扩展到微信、微博、广电机顶盒、融媒体App等网络渠道。提供这些服务的硬件种类繁多数量巨大,且日趋呈现小型化、智能化的特点,对技术安全提出了新的挑战。结合多年来运维实践,以系统底层的硬件输入输出为切入点,全面梳理信号流转,力求建立清晰的传输节点,有利于同类从业人员在复杂的环境中快速定位故障,清晰把控重点设备,寻找替代方案保障技术安全,同时提出针对现有系统未来改造升级的要点供专业人员参考。