尺度噪声水平估计
scale noise level estimation
噪声水平测试
sound pressure level test
自动扫描射水水炮灭火装置
automatic scanning water-jetting high-altitude water cannon fire-extinguishing device
低噪声前置放大电路
low noise preamplifier circuit
固定区间白噪声Wiener平滑器
fixed-interval white noise Wiener smoother