换元法

用特定系数法、换元法、配方法探求二元二次函数的极值公式。

The extremal formula of binary quadratic functions is studied by using method of undetermined coefficients , substitution method and method of completing the square .

你们应该了解换元法，让U等于某值，然后就能把式子变成udu的形式，这就是换元法了。

You should know also substitution , how to set U equals something , and then see , oh , this becomes u times du , and so substitution method .

双站聚束SAR极坐标格式成像算法关于利用极坐标换元法求二重极限的思考

Polar Format Algorithm for Bistatic Spotlight SAR Some Ideas About Seeking the Solution to Double Limit With the Substitution Technique of Polar Coordinate

第二类换元法是一种既重要又不易掌握的积分方法。

The second method of transformation is an important but not-easy-to-master calculus method .

用换元法求连续型随机变量函数分布的两个问题

Two Problems in Finding the Distribution , of Continuous Random Variable Function by Substitution

解布尔方程的换元法

Change of variables to solve Boolean Equations

定积分换元法是定积分计算的主要方法之一。对称性在定积分计算中的应用

The method of the definite integral by substitution is one of the main techniques among the definite integral calculation . Application of the Symmetry in the Definite Integral Calculation

关于换元积分法的两点注记

A Note on Integral by Substitution

第二换元积分法是求函数不定积分的一种重要方法，具有一定的适用范围，对某些无理函数的积分的求解通常使用该方法。

The integration by second substitution is an important method of calculating indefinite integral , it has a certain application , it usually applies to calculate some integrals of irrational function .

通过实例分析了在换元积分法中容易犯的一类错误及其产生的原因，指出了在解题中避免产生这类错误的一般方法。

Specific examples were cited to analyze the mistakes and causes in the use of integration by substitution , and the general method was pointed out to avoid such kinds of mistakes in operation .

在定积分计算中初学者常用的计算方法有三种：（1）利用牛顿-莱布尼兹公式，（2）定积分的换元积分法，（3）定积分的分部积分法。

In calculation of definite integral , beginners tend to use three methods of calculation : ( 1 ) Leibniz formula ,( 2 ) integration by substitution of definite integral ,( 3 ) integration by parts of definite integral .

介质辐射换热有限元法的扩散综合加速算法

Finite element diffusion-synthetic acceleration for radiative heat transfer in participating medium

含多个任意参数的广义变分原理及换元乘子法

Generalized Variational Principles with Several Arbitrary Parameters and the Variable Substitution and Multiplier Method

以控制变分的概念探讨有限变形非对称弹性力学中两类变分原理的泛函π1和π2，并在此基础上用换元乘子法提出能满足全场方程的控制变量广义变分原理。

Two kinds of functional of variational principle π _1 and π _2 are studied in the concept of controled variational , and consequently the controled generalized variational principles are proposed using exchanging element method .

首先导出了厚板哈密顿对偶微分方程，然后采用换元乘子法导出了厚板哈密顿变分原理的泛函表示式，最后提出并证明了厚板理论的两个正交关系。

The Hamiltonian dual differential equations for thick plates are derived and the functional expressions of Hamiltonian variational principle are obtained using the variable substitution and multiplier method . Two orthogonality relationships of the thick plate theory are proposed and demonstrated .