病态

Keywords: singular systems with delay; existence and uniqueness; stability; blind signal processing; ill-conditioned cases.

中文关键词：广义系统；存在唯一性；稳定性；信号盲处理；病态情形。

After linearization of various geophysical inverse problems, all kinds of inversion algorithms are reduced to solve ill-conditioned linear systems.

地球物理反问题线性化处理之后，各种反演算法归结为对病态线性方程组的求解。

In recent years, because of the ill-conditioned psychology, the students often make mistakes in psychology and behavior, even crime, which has had a bad effect on their development of their body and soul, even endangered the family and the society.

近年来，中小学生由于病态心理而导致心理与行为上的失误，甚至犯罪的现象时有发生，严重影响了学生的身心健康和发展，甚至危害了家庭、危害了社会。

Usual methods to cope with this difficulty depend either on the use of very expensive high precision instruments, or on the development of special computation technologies for the solution of ill-conditioned equations.

历来的解决办法是花高价提高测量仪器的精度，或发展对于病态方程的计算技术。

Because the MLS is used in this method, the disadvantages of the method are its less efficiency, and can form an ill-conditioned or singular equations sometimes.

但是移动最小二乘法的使用影响了该方法的计算效率，而且很容易形成病态方程组。

Construction of biased estimates for nonlinear ill-conditioned models are explored, and a simulation method of amending the deviations of nonlinear biased estimates is given here.

探索了非线性病态模型的有偏估计的构造，给出了非线性有偏估计偏差修正的仿真方法。

Be- cause of noisy data,the linearization of nonlinear problems,and in- adequate parameterization of the model,migration velocity analysis is thought to be ill-posed and ill-conditioned.

但由于非线性问题的线性化、噪声及不具物理意义的模型参数化假设，偏移速度分析是不适定和病态的。

This paper has improved some conventional algorithms and presents the weighting iterative improved algorithm and PSD-PCG algorithm, basing on the analysis of ill-conditioned linear system of equations characteristic and origin.

本文在分析了病态线性方程组的特点和成因的基础上，对一些传统的算法进行了改进，给出了加权迭代改善法和PSD—PCG法。

The PSD-PCG algorithm is effective to sovle ill-conditioned linear system of equations whose coefficient matrix is symmetric and positive definite and sparse.

本章提出的PSD—PCG法是解对称正定的稀疏病态线性方程组的有效算法。

Professor Deng pointed out the ill-conditioned problem of grey model firstly, but how to research have not appear. This paper mainly research on the ill-conditioned problem of grey model.

因此研究GM模型的病态性问题，寻找能降低系数矩阵条件数的有效方法，是保证灰预测控制实际效果可靠性的重要基础。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。