Differential method is used for the discretion of time zone , and a direct solution method and an incremental solution method are given out for the solution of the non - linear system equation 求解方程时,在时间域上采用差分法进行离散,给出了求解系统方程的直接法和增量法。
Iris boundary localization based on integral - differential method is modified to improve the localization success rates and the localization speed by eliminating light spots interference and using pupil the position estimation 本文采用亮点梯度检测方法消除光源像点干扰问题,通过瞳孔位置估计提高微积分定位快速性。
The calculation of relative variation of the negative feedback amplifier by differential method results in some errors under certain condition , so there was certain limitation in this method 摘要利用求微分的方法计算负反馈放大器增益的相对变化量,由于在一定的条件下计算出的结果存在一定误差,因而使用这种方法具有一定的局限性。
Finite differential method ( fdm ) was applied to analyze the external flow field by fluent and calculate the drag coefficient , and the result of the external flow field by changing the shape of automobile model can be compared 采用有限差分法,运用fluent软件,分析某轿车模型附近的流场,计算出阻力系的数值,研究车身前部改进对汽车外流场的影响。
In addition , describes the trouble diagnosis of catalytic converter by using the comparing method of double waste - gases , the comparing method of cold and heat idle speed , the temperature differential method in idle speed , the vacuum measuring method and etc 另外,阐述了利用两次废气对比法、冷热怠速对比法、怠速温差法及真空测量法等方法对催化转化器的故障诊断。