In the highly crowded HF band, available continuous bandwidth is very narrow, this threaten the viability of HF radar based on the continuous spectra signal system seriously.
在拥挤的高频频段，可用的连续带宽比较窄，基于连续谱信号体制的高频雷达的生存能力受到严重威胁。
The fluorescence spectra show that the thin film material emits the characteristic narrow band emission of Tb3 + ion under the UV excitation.
荧光光谱分析表明，所得到的薄膜材料在紫外激发下发射出铽离子的特征发射线。
应用推荐