短語詞組短語Indoor propagation loss model 室內(nèi)傳播損耗模型sound propagation attenuation model 聲傳播衰減模型back propagation ann model bp 神經(jīng)網(wǎng)絡(luò)模型flood propagation numerical model 洪水縯進(jìn)數(shù)值模型back propagation bp model 反曏傳播神經(jīng)網(wǎng)絡(luò)fault propagation probability model 故障傳播概率模型propagation loss model 傳播損耗模型propagation fading model 傳播損耗模型propagation attenuation model 傳播衰減模型 返回 propagation model