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Nowadays, the polarimetric radar is very important in the air defense and antimissile fields.
雷达极化技术的进步和极化测量雷达的出现极大地提高了雷达系统的探测能力和目标识别能力,在防空、反导等领域日益发挥着越来越重要的作用。
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The stealth warplane for the microwave radar usually have complicated structures with the coating of wave absorption. On the base of calculation and modeling of the geometrical structure of the warplane in real size, the HF RCS of the air crafts under two different polarizations in different direction have been calculated with the FDTD. The result shows that the above mentioned stealth warplane have the obvious characterstics of frequency resonance, polarization and the relatively large RCS in HF Band 10-30dBm2, which can be used as the theoretical reference for selection of working frequency for sky wave OTH Radar and it also means that the sky wave OTH radar has good capability of anti-stealth targets quantitatively.
对微波雷达具有隐身作用的飞机,其形体较为复杂且表面涂敷有强吸波材料在对一种具有隐身几何外形结构实际尺寸飞机进行计算建模的基础上,文中采用FDTD技术得到了两种极化状态下该飞机无涂敷时不同方向上的短波雷达截面RCS值其结果显示了这种隐身几何外形飞机在短波波段有明显的频率谐振特性、极化特性和较大的RCS10-30dBm2,可为天波超视距雷达在选择工作频率时提供理论参考,并定量地说明天波超视距雷达具有较优的反隐身目标能力
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sticking point:点
因此在城市吸引力上省域范围内无城市可与抗衡,在区域经济社会流的空间模型中,对首位城市的反磁力(反向心力)的作用在于区域内粘滞点(sticking point)的存在,武汉周边地区正因为粘滞点缺失或粘滞力不足而导致武汉区域极化作用大于辐射带动作用,
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contrapolarization:反极化 反极化作用
contrapedalcurve 逆垂趾曲线 | contrapolarization 反极化 反极化作用 | contraposedcoast 叠置海岸
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deplasmolysis:反质离;原生质复归
脱色作用 depigmentation | 反质离;原生质复归 deplasmolysis | 抗极化;除极化;使极化失去分极的作用 depolarization