一般来说，象这样的同时的函数更可取。
In general, simultaneous functions such as this one are preferable.
一个量或一个函数可取的最大值和最小值之间的差。
The difference between the highest and the lowest values that a quantity or function may take.
计算机模拟结果表明，选择合适的窗口函数类型和窗口参数，利用STFT进行跳频信号的跟踪、分析，可取得较好的效果。
Computer simulating results have shown that it is a good method to track and to analyze FH SS signal by using STFT if a proper window function with proper parameter is selected.
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