对于频域，直接对散射场回波复数据进行外推，可获得外推散射场。
The complex data samples are directly extrapolated to obtain the extrapolated echo data in the frequency domain.
目的探讨磁共振快速场回波技术(FFE)在脑内海绵状血管瘤(CA)中的诊断价值。
Objective To evaluate the value of MRI fast field echo (FFE) scan technique in diagnosis of cerebral cavernous angiomas (ca).
但在非均匀风场中，回波结构在运动过程申发生变化，导致该方法的误差大大增加。
In a nonuniform wind field, however, great changes take place in the structure, causing an increase of errors.
在均匀风场情况下，回波结构在运动过程中不发生变化，故用该方法确定的回皮运动精度很高。
The echoes do not change their structure as they move in a uniform wind field so that the method can be used to track the echoes with great accuracy.
介绍一种用矩不变量跟踪天气雷达回波，以估测回波区域内部流场的方法。
A new moment invariant method was presented to evaluate the flow field within weather radar echo.
多普勒速度场、回波顶高、垂直液态含水量、对应的上升气流以及温度平流对这次降水具有预报指示意义。
The vortex in Doppler velocity field, Echo tops, Vertical integrated liquid, lift stream and cold advection are significant in this rainfall case.
波段双基站多普勒天气雷达系统是一种新型气象探测雷达系统，主要用于测量降雨回波的三维风场。
X band bistatic Doppler weather radar is a new kind of weather detection radar system. It can detect three dimensional wind vector fields from the echo of rain.
结果应用低场梯度回波序列(GE)T2 W扫描可提高半月板损伤的诊断。
Results: Making use of the low field gradient echo (GE) -t2w's scanning can improve identifying meniscus injury.
将安徽合肥新一代天气雷达观测的回波强度按上述方法加入到MM5中，形成敏感试验的初始场。
The echo intensity data of Hefei Doppler radar observations come into being the initial fields of MM5 sensitive experimentation.
但在非均匀风场中，回波结构在运动过程申发生变化，导致该方法的误差大大增加。
In a nonuniform wind field, however, great changes take place in the structure, causing an increase of...
根据不同尺度回波生命史来约束其预报时效，得到分尺度下的降水预报场，实现暴雨回波多尺度的合成降水量临近预报；将分尺度与不分尺度降水预报结果进行了比较。
By using the life time of a certain scale echo to restrict the lead time, a forecast can be made for the rainfall at this scale, and total rainfall is obtained through composing.
1775年四月十九日，英军经过列克里敦、康科德两场战役，返回波士顿，途中被撒母耳。惠特莫尔看见了。
On 19 April 1775, British forces were returning to Boston from the battles of Lexington and Concord when they were spotted by Samuel Whittemore.
1775年四月十九日，英军经过列克里敦、康科德两场战役，返回波士顿，途中被撒母耳。惠特莫尔看见了。
On 19 April 1775, British forces were returning to Boston from the battles of Lexington and Concord when they were spotted by Samuel Whittemore.
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