引言

To solve the characteristic polynomial and the eigenvalues of square matrices with higher order normally is not an easy way.

1引言在高等代数中，求一个n阶方阵A的特征值时，常用的方法是求解A的特征多项式|λE-A|的根。

An exact solution is derived for the equation of motion of a charged particle driven by an electrostatic wave.

1引言中作一维运动，E0为静电波电场的幅值。

A higher moment method with the basis of Chebyshev polynomial ｛T_k｝ is presented,which is used in the reliability analysis of engineering structures.

1引言在工程结构的可靠性分析中，一次二阶矩法(包括中心点法、JC法、映射变换法和实用分析法)以及二次二阶矩法得到了广泛应用[1，2]。

Using fresh chlorophyll distilled from fresh leaves of yulan as experimental material,this research analyses the change of the absorption spectra of chlorophyl under light of different wave length,different illuminating time,different temperature by means of using the WGS-9 chroma analysing instrument.

引言光谱分析在各个领域内有广泛的应用，对许多物质，光的吸收性是一个重要的本质特性，通过对物质的光谱分析可以得知它的元素组成成分[1]。在自然界中，叶绿素是广泛存在于植物的叶和茎中的绿色色素，它也有其特定的吸收光谱。

This paper includes five parts. Part one is an introduction which introduces the definition of the circular chromatic number and its equal definition, and then it presents theories and conclusions cited later.

本文一共分为五个部分，第一部分为引言，介绍了圈色数的定义及其等价定义，还总结了后面常会引用的定理和结论。

Chromosome is the carrier of genetic material.

0引言染色体是遗传物质的载体，是基因的载体。

In this paper,finite-difference time-domain method was used to calculate the driving-point impedance of radial disk in circular groove guide.

引言圆形槽波导是一种新型波导，和传统波导相比，具有低损耗、高功率容量、低色散和宽频带等优良特性。

For the optical system with circular apertures,it is difficult to get the boundary radical slope of phase and the accurate sampling value in the circular domain boundary when the intensity transport equation is used to recover the original phase.

1引言相位恢复是指利用光束传播时所探测到的光强信息反演出相位[1]，为了获得更多的光强信息以把相位恢复到最佳，一次光强测量是不够的，因此这就要求在光学系统的输出或成像光轴方向上进行多次光强测量。

Concrete structure with circular cross section,especially concrete column has wide application in engineering.

0引言圆形截面混凝土结构在工程中应用非常广泛，随着我国建筑技术的迅速发展，由于建筑造型的需要在多层及高层建筑中采用了越来越多的圆形截面柱。

According to the annual warning water levels from the Jinchengjiang Guaging Station on the Longjiang River, with 500 hPa circulation index, circulation characteristic amount, local climate and etc., analysis can be made with variance cycle, multiple linear regression, stepwise regression procedure.

1引言 龙江河流域发源于贵州省荔波县境内，流经桂西北地区中部，到达柳州市后流人柳江河，全长390公里。龙江河流域拥有10多个中小型梯级电站，具有发电、灌溉、航运、养殖等功能，是桂西北地区发展经济的主要河流。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。