解析法

And the analytical method of sensitivity analysis based on FEM is discussed.

并研究了基于有限元法的灵敏度分析解析算法。

In architectonics, the calculation of rectangular plate on elastic foundation, in common, is used by the finite element method and chart .

在建筑结构设计中的局部均布荷载作用下非均匀弹性地基上矩形板的计算一般采用有限元法和图表，在理论上很难获得一般性的解析解。

By adopting the asymptotic expansion method, the higher order partial differential equation was transformed into the system of ordinary differential equations.

采用渐近展开法，将该控制方程——高阶偏微分方程转化为常微分方程组，求解该方程组获得应力函数，进而得到功能梯度材料中裂纹尖端应力高阶渐近场的解析式。

Moreover, the quasi-analytical expressions of the relative concentrations at the mobile region and the immobile region are deduced respectively by using Bessel equation, Bessel function and the method of Laplace transform under the initial concentration zero and the first or second boundary condition of a semi-infinite one-dimensional space.

并分别在初始浓度为零，半无限一维空间内第一类边界条件和第二类边界条件下，利用Bessel方程、Bessel函数和Laplace变换法推导出了可动区和不动区溶质相对浓度的准解析表达式。

A periodic oscillation analytic solution for the system at bifurcation point was obtained by using the method of series.

利用级数法求出了系统在分歧点处的时间周期振荡解的解析表达式。

Based on the process models and the desired closed-loop system responses, the analytical expressions of the tuning parameters of the primary and secondary controllers were proposed by means of first order Páde approximation, and then the digital PID controllers were obtained by using bilinear transformation method.

基于过程模型和期望闭环系统响应整定PID参数，采用一阶Páde近似纯迟延环节，以解析的形式推导出了主控制器和副控制器整定参数的表达式，并采用双线性变换法得到离散时间PID控制器。

The purpose of the paper is to .give the field calculation for focus deflection system of a camera tube with electrostatic deflection yokes.

本文对静电偏转型聚焦偏转系统的结构作了分析研究，远用分离变量法给出了圆柱坐标中静电聚焦场和静电偏转场的解析解，并给出了计算实例。

In the determination of methyl acrylate,butyl acrylate and methyl methacrylate in ambient air,the sample was absorbed with active carbon and resolved with carbon bisulfide,and then determined by GC.

测定环境空气中的丙烯酸甲酯、丙烯酸丁酯和甲基丙烯酸甲酯时，气样采用活性炭吸附，用二硫化碳解析，直接进气相色谱仪检测，根据保留时间定性，外标法定量，能获得良好的线性和较低的方法检出限，不仅精密度、灵敏度和重复性良好，而且可操作性强，易于在环境监测系统中推广。

In the determination of methyl acrylate,butyl acrylate and methyl methacrylate in ambient air,the sample was absorbed with active carbon and resolved with carbon bisulfide,and then determined by GC.After the qulitation by retention time and quantitation by external standard method,the good linearity and low detection limit were got.

测定环境空气中的丙烯酸甲酯、丙烯酸丁酯和甲基丙烯酸甲酯时，气样采用活性炭吸附，用二硫化碳解析，直接进气相色谱仪检测，根据保留时间定性，外标法定量，能获得良好的线性和较低的方法检出限，不仅精密度、灵敏度和重复性良好，而且可操作性强，易于在环境监测系统中推广。

Methods Capillary gas chromatography and FFAP capillary column were applied; active carbon tube was used to collect the organic solvent samples in the air of workplaces, the samples were dissolved with carbon bisulfide and determined with capillary gas chromatography.

采用毛细管气相色谱法，选用FFAP毛细管分离柱，用活性炭采集工作场所空气中有机溶剂，经二硫化碳解析后进样测定。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。