The matrices in CwMtx include vectors and square matrices, where vectors include space vectors and quaternions.
CwMtx中的矩阵包括向量和方阵，其中向量包括空间向量和四元数。
A square real matrix a is called an S2NS matrix, if every matrix with the same sign pattern as a is invertible, and the inverses of all such matrices have the same sign pattern.
一个实方阵a称为是S2NS阵，若所有与A有相同符号模式的矩阵均可逆，且它们的逆矩阵的符号模式都相同。
In this paper a "compact least square method" is presented to overcome the ill-conditioned coefficient matrices in the linear regression models.
本文提出一种克服线性回归模型系数矩阵病态的“紧致最小二乘估计”。
Braces are used for the column matrices to distinguish them from rectangular matrices usually put in square brackets.
大括号用于列矩阵，以便使列矩阵与矩形矩阵区分开，矩形矩阵通常采用方括号。
On the other hand, square roots of semi-positive matrices can be expressed by the symmetric expression of eigenvalues, if the eigenvalues of semi-matrices are difficult to compute.
当特征根难以求出而特征根的对称式易求时，半正定矩阵的算术平方根可直接由矩阵的本身的性质来表示。
Finally, the methods to find all instant center velocities and the shortest path leading to any instant center velocity of a mechanism using square adjacent matrices are explained.
给出了应用瞬心速度图的邻接矩阵自乘求解机构全部瞬心速度及求解给定瞬心速度最短路经的方法。
The least square estimate of covariance matrices in the growth curve model with random effects;
该文研究了非线性随机效应模型，为非线性张度大的模型提供了理论和方法。
The least square estimate of covariance matrices in the growth curve model with random effects;
该文研究了非线性随机效应模型，为非线性张度大的模型提供了理论和方法。
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