...谐波分量间的频率间隔也趋于零， 即原周期信号的离散频谱(discrete spectrum)变为了非周期信 号的连续频谱(continuous spectrum) ，同时原傅里叶级数的 求和变为了积分。 非周期信号是由无限多个频率极其接近的频率成分合成， 故其频谱为连续谱。
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... continuous foundation 连续基础 continuous-frequency spectrum 连续频谱 continuous fuel replacement 连续换[燃]料 ...
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不连续频谱 discontinuous spectrum
The benefits to this algorithm is based on the identification of continuous spectrum, time-frequency conversion and modeling using FFT.
该算法的创新之处在于它是基于连续频谱的识别，应用FFT进行时频序列转换然后在频域内建模。
参考来源 - 基于FFT的实时系统控制模型的辨识与应用·2,447,543篇论文数据，部分数据来源于NoteExpress
功率谱密度不论水淹程度如何，整体为一随频率增大其能量按指数递减连续频谱；
The density of power spectral entropy, on the whole, is an exponential decline curve with frequency augmentation without reference to water flooded extent.
结果表明：发动机噪声主要是加性、低强度的连续频谱，在某几个频率成分上也分布着线状频谱。
The results show that the engine noise is additive weak-intensity continuous spectrum or compound spectrum and for some frequencies it is both continuous and linear.
其次研究了非连续频谱感知策略的优化设计问题，即在满足感知开销限制的条件下，如何最小化空闲频谱发现时间。
Secondly, the optimal design of discontinuous spectrum sensing scheme was studied, which aimed at minimizing the spectrum opportunities discovery time while satisfying the sensing overhead constraint.
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