矩问题

Using three moment invariants describing 3-D object reduces data greatly in the model database, this provides a potential solution to 3-D object recognition in arbitrary view.

用三维不变矩来表示三维物体可以极大地减少模型库中的数据量，为从根本上解决任意角度三维目标识别问题提供了潜在的希望。

For both Gram-Schmidt method and adjoint matrix method of MTS, multicollinearity is solved by improving Mahalanobis distance function.

不管是马氏田口的施密特正交化法，还是伴随矩阵法，都是通过改进马氏距离函数来解决强相关问题。

Finally, a hospital viscosity of plasma diagnostic system is optimized by adjoint matrix method and M-P generalized inverse matrix method of MTS. The results show that adjoint matrix method can't select effective variables and M-P generalized inverse matrix method is robust.

最后，利用马氏田口伴随矩阵法和M-P广义逆矩阵法对某医院现阶段血粘度诊断系统进行优化，说明伴随矩阵法在选择有效变量时存在的问题和M-P广义逆矩阵法的稳健性。

Since a proposed application of Dirac structures is to the reduction of some mechanical systems, the reduction of Dirac structures is considered in detail in this paper, without using the existence of momentum mappings or the introducing of the notion of admissible function, etc..

因为引入Dirac结构的—个基本目的即应用于一些力学系统的约化，本文详细地讨论了Dirac结构的约化问题，包括其在Poisson流形以及Jacobi流形等的约化中的重要应用，重点利用了Dirac结构的特征对以及对偶特征对的工具，从而避开了讨论矩映射的存在性以及容许函数等一些复杂概念的介入。

The QED runningcoupling constant α and the anomalous magnetic moment of muon 〓 are twofundamental quantities for the precision test of the Standard Model.

在标准模型精确检验问题中，QED精细结构常数〓和μ轻子的反常磁矩〓中强子的贡献，只能用唯象的色散理论，将夸克贡献"转化"为强子，通过〓湮灭到强子末态的实验数据的积分计算得到。

As an application, a solution of the Manakov-type equation associated with a 3×3 spectral problem is given by using the results on the third coupled equations of the matrix AKNS hierarchy.

作为这样推广的例子，可以从矩阵型AKNS族n=3的结果，给出了一个与3×3谱问题相应的Manakov型方程的解。

A new sensorless speed control scheme for permanent magnet synchronous motor driver is presented. The nonlinear mathematical model of PMSM is established in α-β reference frame and linearized around the best estimator.

永磁同步电机无位置传感器调速系统具有控制方法简单，转矩脉动小，抗扰动能力强，调速性能好等特点，调速系统所要解决的问题是采用何种方法获取转速和转角。

The algorithm speeds up the solution convergence while preserving the sparse matrix structure.

建立了瞬态涡流场问题矩量法解的时域多尺度分析法，加速了解的收敛性，同时又保持了解矩阵的稀疏性。

Taking velocity moment as controlled variable, the formulas were deduced to calculate quasi-3D inverse problem for uniform stream model of guide pulley. According to the theory of two relative flow surfaces and the force analysis of air bubble, the formulas were deduced to calculate quasi-3D direct problem while gas and liquid running in the guide pulley of multiphase pump, and a method was provided to carry on quasi-3D numerical calculation of inner flow filed.

以速度矩作为控制参数，推导出多相泵导轮中均匀流模型的准三维反问题计算公式；基于两类相对流面理论及气泡的受力分析，推导出气、液两相在多相泵导轮中运动的准三维正问题的计算公式，提出一种对多相泵导轮内流场进行准三维数值计算的方法。

And then dynamic process including starting,losing step,reclosing and open-phase operations were analyzed with tine-stepping finite element method and field experiments.

首先研究了同步电机动态分析的共性问题，即局部电磁力、电磁转矩计算与场-路-运动直接耦合求解问题，进而对稀土永磁电机起动、失步、断相、重合闸等动态过程进行时步有限元分析和实验研究。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷