系数矩阵

However,the spectral condition number of the coefficient matrix becomes larger and the rate of residual convergence becomes slow.

然而，虽然所得的系数矩阵是非亏损的，但却导致谱半径变大，使得残量的收敛速度变慢。

Because of the problem of convergence, the key techniques to complete the one step simulation were explored thoroughly. The geometry mapping method based on finite element model and inverse deformation was developed to get the approximate initial blank for one step simulation. The effective selection of convergence factor in Newton-Raphson method was studied. The divergence criterion in iterative process for one step simulation was put forward. Also the countermeasure to ill equations coefficient matrix was studied.

由于存在收敛性的问题，本文重点研究了一步模拟方法计算机实现的关键技术：提出了基于有限元模型的几何映射方法和反向变形方法来确定初始毛坯的近似解，研究了带收敛因子的Newton-Raphson方法中如何高效地选取收敛因子，提出了一步模拟迭代求解过程中的发散准则，并研究了病态方程组系数矩阵的修正方法。

If the Landweber method and pre-iteration method were convergent, the residue sequence would be monotone decreasing. By analyzing the convergence, the fact is demonstrated that for the severe ill-conditioned matrix of sensitivity coefficient, because of the limitation of the precision of the computer, the residue sequence is not monotone decreasing; thereby the reconstruction images diverge from the true distribution of the conductivity. So the generalized inverse method with threshold is established and the selection way of the regularization parameter is presented, by which the better images are reconstructed.

Landweber法和预迭代法收敛，则其残差序列单调递减，通过对它们的收敛性进行分析，证实对于病态性严重的灵敏度系数矩阵，由于受计算精度的限制，迭代过程中的残差序列不再单调递减，从而导致重建图象偏离实际电导率分布，因此作者建立了带阈值的广义逆算法，提出了规则化参数选择方法，获得了较好的图象重建质量。

Based on the matrix of correlation coefficient,linear structural relation model was utilized for data analysis as we...

用相关系数矩阵配合模型结果显示，除上述影响糖尿病患病状况的因素外，还发现自我保健因子对患病状况有间接影响。

Then the corresponding sigma matrix is given to further estimate the beam emittance extracted from electron cyclotron resonance ion source.

然后给出了相应的相椭圆系数矩阵来进一步估算从ECR离子源引出束流的发射度。

Firstly,driving forces equations of each driving pair of the whole mechanism are established by combining D'Alembert Principle with virtual displacement Principle.

然后利用虚设机构法建立机构中各杆件的速度、加速度的一、二阶影响系数矩阵，从而解决了少自由度关联机构惯性力求解中各杆件的速度和加速度难以求解的问题。

The above system can be converted to a linear dynamic system with deterministic parameter matrices but state-dependent process and measurement noises.

上述的系统可转化为一个具有确定系数矩阵的线性动态系统，只是转化后的系统的过程噪声和量测噪声均依赖于状态。

An algorithm MR〓 is proposed based on R〓R〓 transformation and reduced echelon matrix.

接着在第三章里，给出了线性R〓R〓变换可诱导出自然形式系数矩阵的约化梯阵方法MR〓。

The systematic error can be corrected through the integral light energy coefficient matrix.

本文提出通过焦斑积分式光能分布系数矩阵进行校正，并进行了数值模拟研究。

This method solves the problems of choosing coefficient matrices, and it does not need to satisfy a terminal state equality constraint. A PL system example shows that the method is valid and feasible.

该方法解决了系数矩阵的选择问题，不需要满足最终状态等式约束一个分段线性系统的实例证明了该方法是可行的。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新