本文就恰当微分方程的积分因子问题进行推广，得出两个定理。
This article makes an extension on the problem of integral factor in the total differential equation and has drawn two theorems.
对于径向分辨率好或高的测量结果而言，其径向微分几何因子在与仪器一定距离的位置有一个尖峰。
A measurement with good or high radial resolution will have a sharp peak in the radial differential geometric factor at some distance from the tool.
讨论了解常微分方程的积分因子法在极限理论、微分学、积分学中的一些应用。
Some simple application of method of integrating factor that solve ordinary differential equation is discussed on the limit theory, differential and integral.
本文对用分组法求积分因子做了一些改进；从而使一类微分方程的积分因子，主要通过积分的运算就可以得到。
An improvement was made in grouping to find the integrating factors, so that those for some differential equations will be worked out mainly by integration.
通过对相应的多因子变量灰微分方程进行参数辨识，求得各影响因素的权系数。
Competence coefficients of each influential factor are solved through parameters identification of related multi-factor variable grey differential equation.
灵活应用“凑微分”与“分部积分”法解被积函数为三个因子连乘形式的不定积分。
Flexible apply "gather together differential" and "divide part integral" method to solve the indefinite integral whose integrable function is the three factor multiple formative.
从一阶线性微分方程结构特点入手，给出了求其通解的常数变易法的数学原理，并简化了积分因子法。
The existence of particular solutions for a class of Riccati equations is studied by means of variation of constants and initial integral methods.
从一阶线性微分方程结构特点入手，给出了求其通解的常数变易法的数学原理，并简化了积分因子法。
The existence of particular solutions for a class of Riccati equations is studied by means of variation of constants and initial integral methods.
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