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- nonsingular quadric 非奇二次曲面,满秩二次曲面
- We call this surface the stress quadric. 我们称这个曲面为应力二次曲面。
- Conic sections and quadric surfaces. 二次曲线与二次曲面。
- Aim To find a new practice sufficient condition for nonsingular H-matrix. 摘要目的寻求判别非奇异H阵的一个新的实用充分条件。
- In this paper, we gave some new conditions for nonsingular H-matrices. 本文给出了非奇异H-矩阵若干个新的判据。
- Theorem 1 If , where P is a nonsingular matrix, then rank (A)=rank (B). 即B仍是实对称矩阵;所以式(6.;2
- How to prove the problems of inequality by quadric form is discussed. 讨论了利用二次型证明不等式的问题.
- We call a matrix the generalized cyclic matrix if it can be written the product of a nonsingular diagonal matrix and a cyclic matrix. 摘要可表为非奇异对角矩阵和循环矩阵乘积的矩阵，我们称其为广义循环矩阵。
- Positive semi-definite matrices are positive definite if and only if they are nonsingular. 正半定矩阵是正定的，当且仅当它们是非奇异矩阵。
- It is difficult to determine a nonsingular H-matrix in practice.The problem is investigated in some paper. 摘要非奇异H-矩阵的判定在实际中非常困难，许多文章讨论了这类问题。
- A simple method of solving an orthogonal transformation with a primary transformation is presented by change quadric form into canonical form. 给出了利用初等变换求一个正交变换化实二次型为标准形的简便方法。
- We turned the singular boundary value problems to nonsingular problems, and presented a numerical method for them. 通过变换将奇异边值问题转化为非奇异边值问题，提供了求解这类奇异边值问题部分数值解的数值求解方法。
- It has appeared many results about regularity for weak solutions of quadric jncreasing parabolic equations. 得到了一类二阶散度型椭圆方程很弱解的一个正则性结果。
- The key idea of SSVM is to transform the standard model of SVM into an unconstraint quadric convex programming problem. SSVM模型的基本思想是将标准的支撑向量机模型转化成一个无约束二次凸规划模型进行求解。
- Extracting quadric surface from measured data is an important problem in reverse engineering of mechanical parts. 摘要在机械产品的逆向工程中，针对测量数据提取常用二次曲面是非常重要的。
- In the meantime, the matrix's eigenwert and nonsingular problem was analyzed under the condition of irreducibility and diagonally dominance. 另一方面,从若干角度分析了在不可约且对角占优条件下,矩阵的特征值和奇异性问题。
- This paper proposes for the first time to use genetic algorithm based on real-number-coding to extract quadric surface. 首次提出利用基于实数编码的遗传算法针对离散数据点进行二次曲面提取。
- The generalized inverse of partitioned matrices and the expression of generalized inverse using maximal nonsingular submatrix are discussed. 摘要讨论了分块矩阵的广义逆，以及用矩阵的满秩子块表示广义逆。
- On the area of actual process, It is often seen that one surface of the part is quadric surface. 在实际生产中,如果某一加工表面是二次曲面,对于这类曲面轮廓的加工常采用数控加工方法。
- Moreover, we give the bounds for the inverse of a nonsingular M-matrix and the upper bound for an arbitary complex matrix. 在推论部分给出了非奇异M矩阵之逆的谱半径的界的估计以及任意复矩阵谱半径的一个上界的估计。
