1)direct wave直达波
1.Thus in common receiving gathers,firstly calculate the polarization coefficient of direct wave for each trace,and then use the resulted coefficients as weights to determine the main polarization direction in detector coordinates via weighted least square metho.因而,可以在共检波点道集中,首先计算各道直达波的偏振系数,再用偏振系数作为权系数,采用加权最小二乘算法直接计算出检波器坐标中的主偏振方向,以此准确估算出检波器方位。
2.This paper firstly established emulation mode of the transmission of outer radiant point signal,therefore calculated intensity of direct wave signal and multipath signal,and compared it with practical measure value.首先建立了外源信号传播的仿真模型,由此推算出直达波信号与多径反射信号的强度,并与实际测量情况进行了比较验证,然后将直达波强度与多径信号强度作了对比分析,得出直达波的存在对布站的影响,从而为接收站的布置问题提供了参考依据。
3.Interference of acoustic direct wave coming from sound source makes accurate determination of underground conditions with acoustic waves difficult.在浅地层地下物体的声波探测中，沿地表层传播的声直达波干扰是影响探测结果的主要因素之一。
英文短句/例句
1.Get tickets through to Boston.买直达波士顿的票吧。
2.Is there a bus that goes to Boston directly ?有直达波士顿的车吗？
3.A Study on Anti-direct Path Interference Technology in Radar System Based on Opportunity Illuminator外辐射源雷达抗直达波干扰技术研究
4.The debris falling back to earth may generate additional direct and surface-wave noise.碎石落回地面可产生附加的直达波和面波噪声。
5.Suppressing the direct wave interference in GPR data using adaptive interference canceling自适应对消在去除探地雷达信号直达波的应用
6.Direct-path Interference Suppression for Passive Radar Based on DTTB Illuminator基于DTTB照射源的无源雷达直达波干扰抑制
7.Direct signal DOA estimation algorithm in radar low angle bearing environment雷达低空测向环境中的直达波DOA估计算法
8.Direct-Path Signal Obtaining to Digital Video Broadcasting Transmitter Radar Based on the Spatial Filtering数字电视辐射源雷达基于空域滤波的直达波获取
9.Study of CT Detecting Concrete Lacunas of Surface Direct Wave表层直达波CT探测混凝土空洞的试验研究
10.A blind source separation approach to active sonar’s direct path interference suppression主动声纳直达波干扰抑制的盲分离算法
11.No, this train is an express one and it's going straight to Boston.不停，这是直达快车，直接开到波斯顿。
12.UA Flight 222 is a direct flight to Boston.联航222班机是去波士顿的直达班机。
13.His line of communications trailed back a thousand miles to Tripoli.他的交通线长达一千英里，直到黎波里。
14.Simulation of motion model and radar echo of linear moving target according to PolSAR极化SAR直线运动目标建模与雷达回波仿真
15.DOA Estimation of Rectilinear Signals Using Defective Electromagnetic Vector Arrays残缺电磁矢量阵列直线信号波达方向估计
16.This reflected blast wave, like the original (or direct) wave, is also capable of causing material damage.反射爆震波〔像入射（或直达）波）一样，也会对物质起破坏作用。
17.The object of the filtering is to enhance the direct pulse from the shot and to attenuate the ghost.滤波的目的，是改善来自炮点的直达脉冲并压制伴随波。
18.The video signal is directed to the CRT through a sound trap which eliminates the sound-carrier frequency.视频信号通过声音陷波电路，消除声音载波频率，直达CRT。
相关短句/例句
direct signal直达波
1.The detecting performance of the external illuminator base bistatistic continuous wave radar system is greatly influenced by the direct signal and the multipath reflected clutter received by the main receiving channel.在利用外辐射源构成的收发分置连续波雷达系统中,直达波及多径杂波严重地影响了雷达对运动目标的探测性能。
3)direct-path-wave直达波
1.The factor to affect the performance of the passive radar is as following:direct-path-wave,multi-path effect,co-channel interference,etc.影响外辐射源雷达性能的主要因素有直达波信号对消、多径信号对消、同频干扰的消除等,在系统设计中应进行针对性设计。
2.When FM broadcast transmitter is regarded as extra irradiation source,multipath interference will lead to mismatch between the direct-path-wave reference signal and the echo reflected from target during matching filter,and then it will degrade the performance of moving target detection.利用民用FM广播信号为无源雷达的外辐射源时,由于信号在空间传输时产生严重的多径干扰,导致接收站获取的直达波参考信号与目标反射的回波在后继匹配滤波时出现失配现象,严重影响了雷达的目标检测性能。
4)direct-arrival wave直达波
1.This paper studies the method of restraining direct-arrival wave of passive radar based on outside radiation source,which adopts the adaptive technique of phased array radar,generates zero falling in the direction of direct-arrive wave to restrain the jamming by adjusting weighted vector.对基于外辐射源的无源雷达系统中的直达波抑制方法进行了研究,采用相控阵雷达的自适应技术,通过加权向量调整从而在直达波干扰方向上产生零陷来抑制其干扰。
5)non-line-of-sight非直达波
1.How to mitigate position error caused by non-line-of-sight (NLOS) propogation when we use range-based tracking algorithm in Cellular Networks?2.在跟踪蜂窝移动通信网络中移动终端的运动轨迹时,如何利用粒子滤波器减弱非直达波传播对滤波跟踪算法精度的显著影响?2。
6)NLOS非直达波
1.Large tracking error has been found in the use of classic extended Kalman filter in LOS/NLOS hybrid environment.扩展卡尔曼滤波算法在直达波(Line-Of-Sight,LOS)和非直达波(None-Line-Of-Sight,NLOS)混合环境中存在显著的误差。
2.The simulation results show that NLOS (non-linear of sight) error of the ROS model is higher than DOS model’s.同时还分析讨论了现有的几种直达波定位算法,并在直达波环境下和非直达波环境下对现有的基本直达波算法进行了仿真。
延伸阅读
直达1.谓直接到达，直通。 2.谓交通便利，往来自如。 3.谓直接送呈。 4.谓正直而通达事理。
