此图可根据各不同参数下的等倾线照片来绘制。
This can be accomplished by tracing the lines of different parameters from photographs.
提了基于二阶线性系统等倾线法绘制相平面原理，实现了高阶非线性控制系统相平面相轨迹的作图算法。
In this paper a new concept of phase contrail of phase plane for higher order nonlinear control system based on isoclines method of second-order linear system is proposed.
提出了一种简单的数字图像方法分离等倾线与等差线，得到全场等差线条纹图；
A simple digital image processing method is proposed to separate the isochromatics from the isoclinics.
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