To study the method of designing nonlinear frequency modulation (NLFM) signal waveform, the dynamic selection method was adopted on the basis of phase stationary theory.
研究非线性调频信号波形设计方法。 依据相位逗留原理，采用动态优选法，给出了一种改进的非线性调频信号波形设计方法。
Dynamic data is used in this method resulted in high accuracy and strong objectiveness, overcoming the subjectiveness in former single well measure selection.
此方法均应用动态数据，客观性较强、准确性较高，克服了以往选择单井措施的盲目性和主观性。
In a dynamic system analysis with the method of state variable, when the system is more complex, the selection of state-variable has some difficulties.
用状态变量法分析动态系统时，若系统比较复杂，对于状态变量的选择就存在一定的困难。
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