1) broadband impulsive sound propagation
宽带脉冲声传播
1.
A representation of broadband impulsive sound propagation with moving source and receiver was derived based on beam tracing theory with reference to normal-mode propagation of moving source and receiver.
应用傅立叶综合方法和波束跟踪理论,研究了分层介质中运动声源和接收器的宽带脉冲声传播,根据运动声源和接收器声传播的简正波理论,导出了基于波束跟踪方法的运动声源和接收器宽带脉冲声传播表达式。
2) sound pulse propagation
脉冲声传播
3) broad band ultrasonic pulse
宽频带超声脉冲
4) broadband pulse
宽带脉冲
1.
It is found that they are the same in the neighbourhood of z-axis for narrowband pulses, but in the case of broadband pulses, singularities emerge near z-axis for pulsed beams obtained by using complex amplitude envelope representation and only complex ana.
数值结果表明脉冲光束为窄带时,在传输方向轴中心的一定范围内两种解是一致的,而对于宽带脉冲光束,复振幅包络解在轴中心较近的距离即表现出奇异性,复解析信号解才是符合物理意义的表示式。
5) pulse bandwidth
脉冲带宽
6) pulse propagation
脉冲传播
1.
The parameter matrices C, L, R, G in the model are calculated by using static-steady electromagnetic fiele theory and using the relationship between the parameters and the pulse propagation velocity, which is tested on a single bar laid down in a slot of turbine generator stator.
利用多导体传输线原理，建立大型汽轮发电机定子绕组的脉冲传播模型，模型参数是基于似稳电磁场的有限元数值计算方法，根据电容、电感、电导、阻抗、传播速度间的关系求得。
补充资料：宽带和窄带业务
宽带业务是相对窄带业务而言的，一般来说，对于速率低于2Mb/s的通信业务统称窄带业务，如电话网、N-ISDN所提供的业务。对于高于2Mb/s的通信业务，如帧中继业务、视频点播、ATM业务、TV会议等称为宽带通信业务。 目前投入应用的宽带接入技术主要有两种：ADSL和FTTX＋LAN。
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