In this paper, we introduced another method of variation of constant of the second-order linear equation.
介绍了二阶线性微分方程的又一种常数变异法。
In this paper, a linear function of bearing variation versus time is given, and the method of work-point drifting are used to solve filter system which is unstable in bearing small change.
给出了一个形式简洁的方位随时间线性变化的可量测函数，并利用工作点漂移的技术解决了滤波器在方位小变化量时系统的不稳定现象。
A new method for analyzing a heat exchange system performance variation is proposed along with the establishment of a relevant linear mathematical model.
本文提出了分析系统性能变化的一种新方法，并建立相应的线性数学模型。
Based on biconjugate gradient method, we redefine inner products using general variation principle, which can make complex linear equations solving have high-performance.
在一般双共轭梯度法的基础上，本文利用广义变分原理对内积进行了重新定义，使双共轭梯度法求解复线性方程组更为有效。
METHODS Accelerated test classical constant temperature method, and multi-variation linear model were used to estimate shelf life.
方法 ：采用加速试验 ，经典恒温法和多元线性模型预测其有效期。
METHODS Accelerated test classical constant temperature method, and multi-variation linear model were used to estimate shelf life.
方法 ：采用加速试验 ，经典恒温法和多元线性模型预测其有效期。
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