分量表示

The classical principal component analysis is one of the most effective feature extraction methods. PCA essentially gives the optimal representation in a minimum of mean square sense, so it is usually used to minify the dimension of high dimensional image pattern modes.

传统的主分量分析方法是最为经典的图像特征抽取方法之一，由于其本质上是在最小均方差意义下给出了模式样本的最优表示，所以它通常被作为对高维图像模式进行降维的一种常用方法。

In view of this problem,a parameter extremum optimization model is developed,in which such error factors as the decaying DC components,nonsynchronous sampling and harmonics are precisely depicted.A new measuring method based on the hybrid genetic algorithmis developed to use this model for finding accurate power system parameters such as the amplitude,phase,frequency and harmonics.

针对这一问题，建立了电力参数极值优化模型，同时对衰减直流分量、非同步采样及谐波等多个误差参数加以精确表示，利用混合遗传算法对该模型进行求解，可得到准确的系统幅值、相位、频率及谐波等电力参数。

The relationship between electric components of incident and refracted waves is expressed by transmission coefficients from Fresnel equations.

其中， 入射光和折射光电场分量之间的关系用菲涅耳方程中的透射系数表示。

A universal formula of MINQUE of variance components;2. It is concluded that the phasor can be represented by the form of a-jb,and thus the impedance and negative sequence component can be calculated correctly.

通过分析近年发表的相关傅氏算法的文献，提出对几个问题的质疑，结合实际的工程实例和信号的物理意义，认为信号的虚部是-b即相量用In=an-jbn表示，才能正确计算出阻抗、负序分量等。

In the spline interpolation for well trajectory ,each coordinate of the well trajectory can be indicated as a 3-order spline which variated with well depth.

在计算实钻井眼轨迹的样条插值法中，假设井眼轨迹的每个坐标分量都可以表示成以井深为参数的分段三次样条函数。

By means of coordinate transformation, the part of stresses in the expression of stress field caused by temperature at the moment of application of transient current on the plate with a side-crack was separated and expressed in polar coordinate.

采用坐标变换的方式，将单边裂纹载流薄板通电瞬间由温度产生的应力场表达式中的各应力分量分离，并用极坐标进行表示。

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。