1) echo characteristics
回声特性
1.
Planar element method is one of approximate computation means for echo characteristics of submerged targets.
板块元法是一种水下目标回声特性的近似计算方法,提高其积分计算的稳定性和快速性是应用中常遇到的问题。
2) high-frequency echo characteristics
高频回声特性
1.
In present paper a hybrid technique that planar elements method combined with the method calculating the reflection characteristics of multiple-layer structures based on transfer matrix method is developed for more exactly studying high-frequency echo characteristics of underwater targets with multiple-layer structures.
为准确预报其高频回声特性,提出平面元方法结合基于传递矩阵的多层结构反射特性计算方法的混合方法研究水下三维多层结构目标体的高频回声特性,并研究多层圆板、圆球和有限长圆柱等水下多层结构三维目标体的回声特性。
3) acoustic echo channel characteristic
声回授通道特性
1.
The application of periods pseudo random binary signals for room s acoustic echo channel characteristic measurement;
多周期PRBS信号在测量房间声回授通道特性中的应用
2.
Authors introduce the measurement on room s acoustic echo channel characteristic based on classics spectral estimation method.
介绍基于经典谱估计方法进行房间声回授通道特性的测量,并用相干函数衡量其准确性,就测量结果做了分析,为实际的自适应回声对消系统提供参考和指导。
4) echoes characteristic
回声特征
5) echoic property
回声性
6) noise characteristic,noise characteristice
噪声特性<声>
补充资料：边界回声
边界回声
boundary echo
器官、组织或病灶的边界处回声。可观察被膜(包膜）有无、厚薄、钙化等，有无粘连，边缘是否光滑、规则或清晰等。观察边界回声对疾病诊断具有重要价值，尤其对鉴别良性和恶性肿瘤作用更显著。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条