By analyzing the influence of sound speed perturbation and array tilt on ray travel-time,ray travel-time and relative arrival-time errors are formulated in this paper.
本文通过分析声速扰动与基阵倾斜对声线传播时间的影响,推导了声线传播时间误差和时延误差估计公式,揭示了基于声线传播时间和相对到达时刻的匹配场声源定位对失配的敏感性。
The affecting factor analysis of propagation time of peak flood in downstream of the Yellow River;
影响黄河下游洪峰传播时间因素的分析
under the condition of identical source sensor location,testing stress wave propagation time-goal sensor location curve,respectively in the hole sample and the intact.
在确定传感器布置方式及数量的基础上,通过敲击不同位置源传感器,测试未钻孔木圆盘试样应力波传播时间,在同一试样钻一定直径孔洞,测试应力波传播时间;在源传感器位置相同的条件下,分别测试出有孔洞、无孔洞传播时间—目标传感器位置曲线,对比分析应力波在有孔洞木材内部传播时间变化的特点,实现对木材内部孔洞定性判别。
Nondestructive pressure measurement based on surface wave usually requests accurate measurement of propagation time of surface wave in the medium.
基于表面波的压力无损测量方法要求精确地测量表面波在介质中的传播时间。
Sound speed profile in ocean inverted by using travel time;
由传播时间反演海水中的声速剖面
The measurement technology of the ultrasonic travel time of the ultrasonic based on phase-matched theory was presented.
通过虚拟仪器平台的实验,表明该测量系统的信号传播时间测量具有ns级的测量精度。
In this paper,we not only consider the difference between "up-crossing"and "down-crossing" of the wavefront and the stochastic surface and present the general equations of the probabilities of the travel time of the earlier arrivals,but also extend the resu.
Fuks和Godin关于随机界面背向散射脉冲传播时间统计特性理论只适应于随机界面和波阵面“up-crossing”且界面高度-斜率不相关情形。
The ACM was designed for transmitting and receiving the sound signal at same time,and accurate measuring acoustic travel time between two separated stations,using the M-sequence sound signal and GPS time clock.
该声学测流仪采用了M序列码声信号,通过利用GPS时间信号进行两个站位间异地同步水下声信号的发送和接收,实现双向声传播时间的精确测量。
The method of propaga-tion time and the method of tide lag can be used for forecasting the occurrence-time of tide bore.
涌潮潮时预报方法有传播时间法和隔日滞后时间法。
Research on Measurement of Ultrasonic Transit Time Based on Sing-around Method;
基于回振法的超声波传播时间测量方法研究
Research of Acoustic Temperature Field Measurement System and Acoustic Travel-time Measurement Method
声学法测温系统及声传播时间测量方法研究
Analysis of pulse transit time variability based on LZ complexity
基于LZ复杂度的脉搏传播时间变异性分析
Preprocessing methods for spectrum analysis of pulse transit time variability
脉搏传播时间变异性谱分析的预处理方法研究
Review of the Signal Processing Techniques in Transit-Time Ultrasonic Flowmeters
传播时间法超声流量计信号处理技术进展述评
Numerical simulation study on inversion of two dimensional flow field using acoustic ray travel time
基于声传播时间的二维流场反演数值仿真研究
a delay line based on the time of propagation of sound waves.
基于传播声波的时间的延滞线路。
a delay line based on the time of propagation of electromagnetic waves.
基于传播电磁波时间的延滞电路。
Propagation Characteristics of Time-Reversed Electromagnetic Wave and Its Application
时间反演电磁波的传播特性及其应用
He explained that gravity was not an instantaneous force as Newton assumed, but that it took time to travel.
他解释，重力不像牛顿说的那样是瞬时传播的，它的传播需要时间。
It was put forward that in recent market transmitting environment, the research and practice of symbol transmitting is in urgent need.
提出在传播环境中,关于符号传播研究和时间的迫切性。
In a hundredth of a second, light travels 3,000 kilometers.
在百分之一秒的时间里，光传播了3000千米。
Pair-wise Broadcast Time Synchronization Algorithm for Wireless Sensor Networks
无线传感器网络比对广播时间同步算法
The Analysis of the Property and Stabilized Time of the Pressure Step Propagation in the Pressure Transducer
压力传感器中压力阶跃的传播特性与稳定时间分析
The time that a radio or television station is broadcasting.
广播时间无线电广播或电视台广播的时间
The time delay is twice the pressure-wave transport time from one end of the pipe to the other.
时滞是压力波从管的一端传播到另一端所需时间的两倍。
From "Hard Communication Times" to "Soft Communication Times"--Inquiring about Historically "Hard Communication" Phenomenon Trend;
从“硬传播时代”到“软传播时代”——关于“硬传播”现象走向的历史质询
