根据跳频信号瞬时带宽，将潜在跳频频率点邻域时频图投影到时域，分选潜在频率跳变点集合。
The potential temporal hopping point set is fetched from the temporal projection variance of the adjacent domain time-frequency image according to the instantaneous signal bandwidth.
提出一种跳频电台通过抑制跳频频率点、破坏干扰站网台分选的方法，从而达到对抗跳频跟踪式干扰的目的。
A method of controlled frequency points is put forward, which can destroy FH signal sorting. So the running-after-sport jamming will not be effective.
采用正交磁场由功率调谐曲线实现稳频，可使双频频差的漂移量大大降低。
Adopting mutually orthogonal magnetic fields, the power tuning curve is utilized for stabilizing optical frequency, the frequency difference drift of double frequency is lower greatly.
近年来，各地频频发生的煤矿事故，给人民的生命财产造成了极大的损失，也引起了社会的广泛关注。矿难事故频发，虽然非法开采、设备落后、意识淡薄、执法不力、罚不够狠是祸端。
In recent years the high rate of colliery accidents has had a very bad effect on the life and property of people and they have also drawn the attention of the society.
利用快速四阶循环累积量算法、时频脊线分析与小波变换相结合的方法，实现了跳频频率和码速率等参数的高精度估计。
They are used to yield accurate estimation for the hop frequencies and hop rate, which are fast 4th-order cyclic cumulants algorithm, time-frequency backbone curve analysis, and wavelet transform.
利用快速四阶循环累积量算法、时频脊线分析与小波变换相结合的方法，实现了跳频频率和码速率等参数的高精度估计。
They are used to yield accurate estimation for the hop frequencies and hop rate, which are fast 4th-order cyclic cumulants algorithm, time-frequency backbone curve analysis, and wavelet transform.
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