目前已经出现了四种主要的外汇危机预警模型，即信号方法、概率单位方法、截面回归方法以及主观概率法。
There has been four kinds of main early warning models of exchange crisis at present, namely "signal" approach, probit model, cross-county regression model and subjective probability method.
低截获概率信号的出现对于电子对抗提出了新的挑战。
The present of LPI signals brings a new challenge to electronic warfare.
低截获概率信号的出现对于电子对抗提出了新的挑战。
The present of LPI signals brings a new challenge to electronic warfare.
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