正定的

词组短语

positive definite

与正定的相关的网络例句 [注：此内容来源于网络，仅供参考]

In this paper, an extended divide and conquer algorithm is intended proposed, which is for solving the real symmetric band generalized eigenvalue problem under distributing environment Eigenvalue partition theorem is presented and proved Based on divide and conquer by extension, this algorithm computes generalized eigenpaires of symmetric band matrix pencil by bisection and generalized Rayleigh quotient iteration Theoretic analysis and numerical results show that this algorithm is better than the classic software package LAPACK when bandwidth is small and the scale is large Combined with multisection, which has good parallelism, it got good effects under distributed environments

提出了分布式环境下计算对称带状广义特征值问题的一种扩展分治算法，给出了特征值分割定理及其证明算法在扩展分治的基础上，利用二分压缩结合广义Rayleigh商迭代计算广义特征对理论分析和数值实验表明，对于窄带宽大规模的广义特征值问题，该分治算法明显优于LAPACK软件包结合并行性好的多分法，在分布式环境下获得了很好的并行效果1 引言本文研究了对称带状广义特征值问题Ax =λBx ( 1)的并行计算，其中，A ，B均为半带宽为r的n阶实对称带状矩阵且其中之一是正定的本文总假设B是正定的求解此问题有两种传统方法，第1种方法是通过计算矩阵B的Cholesky分解，将问题( 1)转化为标准特征值问题[1～3] ，进一步

This thesis has mainly contributed two results in theory: one is that the covariance matrix is not positive definitive if the number of sampling is least than the number of variables, the other is that the covariance matrix of discrete sample is positive definitive if and only if the sum of every random column vector of data matrix is non I-linear combination.

本论文在理论上，主要得出两个新的结果：ⅰ抽样调查中，若样本的个数少于变量的个数则样本协方差矩阵恒为非正定；ⅱ离散型样本协方差矩阵正定的充要条件是样本资料阵的各随机列向量是非I-线性组合。

Further more, this thesis has provided a new method for optimizing sampling in theory, and established the probability model for the positive definitiveness of discrete sample by which the number of sampling was optimized.

在应用上，建立了离散型样本协方差矩阵正定的概率模型；提出了一种新的优化抽样调查设计方案，优化了抽样个数。

In a special case of 2 dimensional variables, the probability of the positive definitiveness of the discrete sample covariance matrix is given in term of sample size and variable dimension. Based on the results, the optimal sample size is provided in this thesis.

推出了离散型样本协方差矩阵正定的充要条件，得到了求离散型样本协方差矩阵正定概率的模型，建立了特殊情况下的抽样优化模型。

In the inversion of re- flection coefficient, t...

迭代反演反射系数时，对于过渡矩阵没有对称正定的限制，从而改善了算法的稳定性，同时减少计算量。

Though alone in the wilderness, if one lives heedlessly, one won't cross over, beyond Mara's sway.

因为一个心灵充满憍慢的人，内心不可能温顺慈善；一个心灵没有正定的人，内心不可能有智慧。

The first way is to ensure the kernel function to be positive definite by introducing space mapping transformation;the second way is using similar-SVR model to solve the unsolvable problem of SVR model with non-positive definite kernel function.

一是通过引入空间映射变换保证所得到的SVR的核函数是正定的；二是利用近似SVR模型解决具有非正定核的SVR模型的不可解问题。

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 the conclusion that the algorithms are very effective in accuracy and can avoid the major defect of non—positive definite coefficent matrix of static analysis based on conventional mixed models.

这两种模型除具有很高的计算精度外，还避免了一般空间混合元静力分析中系数矩阵不正定的重要缺陷。

A prerequisite for positive or negative quadratic form was presented and it was proved by use of definition.

本文给出了二次型正定的1个必要条件，并对二次型正定、负定的必要条件给出了用定义证明的方法。

与正定的相关的网络解释 [注：此内容来源于网络，仅供参考]

bedingt konvergent conditionally convergent：无条件收敛的

Basiswinkel base angle 底角 | bedingt konvergent conditionally convergent 无条件收敛的 | bedingt positiv definit conditionally positive definite 无条件正定的

positive definite：正定

唯一性,及求出的解是使得残差项平和(SSE)最小的解,证明的方法是通过矩阵X'X是非奇异阵(nonsingular matrix)及 正定(positive definite)来说明非齐次线性方程系统(heterogeneity linear equations system)的解的存在性及唯一性,

positive definite：正定的

正相关 positive correlation | 正定的 positive definite | 正超几何分布;正超几何分配 positive hypergeometric distribution

positive definite：正定的;定正的

正相关 positive correlation | 正定的;定正的 positive definite | 正定型 positive definite form

positive definite：正定,正定的

positive damping 正阻尼 | positive definite 正定,正定的 | positive definite differential form of degree two 正定二次微分形式

DNR：正定霉素

例如正定霉素(DNR)可以与接上了半乳糖末端残基的入血清白蛋白结合成肝靶向药物(DNR-Gal-HSA),用于肝癌的治疗,使70%的药物浓集在肝脏,降低药物的毒副反应.

completion problem for partial matrix：部分正定阵的完成

多端口电小天线:electrically small antenna with two ports | 部分正定阵的完成:completion problem for partial matrix | 集装箱港口竞争力评价指标体系:container ports competitive edge evaluating index

positive definite differential form of degree two：正定二次微分形式

positive definite 正定,正定的 | positive definite differential form of degree two 正定二次微分形式 | positive definite form 正定型

positive definite operator：正定算子

positive definite matrix 正定矩阵 | positive definite operator 正定算子 | positive definite 正定的

positively definite variational problem：正定变分问题

positively definite sequence of numbers 正定数列 | positively definite variational problem 正定变分问题 | positively related 正相关的