查询词典 aperture

Polarimetric Synthetic Aperture Radar measures the frequency, magnitude, absolute and relative phase of targets' backscattering signals in imaging scene for any possible combination of transmit and receive antennas. The polarization synthesis technique on one hand has greatly increased the acquired polarization information, on the other hand increased the difficulty of system design and signal processing.

中文摘要极化合成孔径雷达的回波信号可以提供不同收发极化状态组合下成像场景内目标散射波的幅度、绝对和相对相位、频率等信息，极化合成技术的出现使获取的信息量成倍增加，信息量增加的同时系统设计和信号处理的复杂度增加，因此极化合成孔径雷达相关技术的研究成为微波遥感领域的热点。

The results show that the optimum mole percent of Al3+ to Yb3+ is 9—11 for high concentration of ytterbium-doped silica-based fiber at which low concentration quenching probability, high absorption coefficient and proper numerical aperture can be obtained.

揭示出在高掺Yb3+的石英基光纤中，共掺Al3+的摩尔浓度为Yb3+摩尔浓度的9—11倍时既可以减小Yb3+的浓度猝灭概率，又可以获得高吸收系数，同时还可更好地满足数值孔径的要求的结论。

Based on the theory analysis and experiment work, the paper studies the humidifying property of the centrifugal nozzle with firing pin type, high pressure and little aperture. Compared with the traditional air washer, the high efficiency and energy saving character of this kind of nozzle is stood out.

课题从理论和试验两方面分析研究了撞针型高压小孔径离心式喷嘴的雾化加湿性能，并将其与传统喷水室加湿系统进行能耗比较，突出了撞针型高压小孔径离心式喷嘴高效节能的特点。

Synthetic Aperture Radar; Motion Target Detector; Time domain sub-aperture

合成孔径雷达；运动目标检测和成像；时域子孔径

For side-looking IVUS, we propose a single-wire multi-element synthetic aperture system. In this way, we can decrease the number of connections by using multiplexer and synthetic aperture focusing technique, and do beam-forming using optimal filtering.

针对侧向视野之血管内超音波，我们提出单导线系统架构配合多通道合成孔径系统，利用多工器切换与合成孔径聚焦降低连接数，并利用最佳化滤波器做到波束聚焦之效果。

Frequency modulated continuous wave synthetic aperture radar,which combines FMCW technique with synthetic aperture imaging methods,has such advantages as small volume,light-weight,costeffective,high-resolution.

1引言合成孔径雷达具有全天候、全天时、强透射性和高分辨率等优点，已成为重要的军事侦察手段，调频连续波SAR具有体积小、重量轻、成本低和分辨率高等优点，因此，人们对FMCW SAR越来越关注[1-2]。

The Miyun metre-wave aperture synthesis radioteleseope, working at frequency of 232 MHz, consists of: an E-W array of 28 elements each of 9 m aperture. 192 baselines are effected with a full coverage of U-V plane (Fig. 2). The longest baseline is 1,164 m, This instrument is designed for source survey and detection of peculiar source in north declinations.

密云米波综合孔径射电望远镜工作在232MHz，由28面直径9米的东-西天线阵组成，天线阵全长1164米，u-v平面覆盖完整，适于进行北赤纬天区射电源普查及特殊源搜索。2×12小时观测得&热噪音限制&灵敏度0.05Jy，综合方向束3′。8×3′。8cscδ，视场8°×8°，可以在两年以内完成δ≥+30°天区的普查，并开展选区监测。

Deduce the formulae for the aperture coupling and the parameters of different aperture distribution , And construct the mathematic model of Broad band mode discriminators.

系统推导出宽带模式识别器的小孔耦合和耦合孔不同设置方式下相关尺寸及电磁参数的计算公式并建立起较完整的数学模型。2。

Interferometric Synthetic Aperture Radar is one of the most important part in the field of Synthetic Aperture Radar.

合成孔径雷达干涉测量是合成孔径雷达领域诸多应用中的一个重要方面，能够全天候、全天时地提供高分辨率的雷达图像，是目前获取三维数字高程模型最有效的技术手段。

ABSTRACT Interferometric Synthetic Aperture Radar imaging is one of the most important developing direction of Synthetic Aperture R...

干涉合成孔径雷达成象是合成孔径雷达成象重要的发展方向之一，其成象结果的应用领域更为广泛。

This is not an ordinary box, which is used as a background picture of the dialog box, very pretty.

详细说明：这可不是一个一般的对话框，它是用图片作为背景的对话框，非常好看。

Conceal me what I am,and be my aid for such disguise as haply shall become the form of my intent.

遮掩我的身份，帮助我，我的面具将成为我的目的。