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- The result reveals that small geometric focal length and large angle may decrease the -3dB focal area, and increase length to width ratio and the pressure magnitude of main lobe. 由结果得知，曲率半径愈小张角愈大会导致烧灼面积减小、长宽比增加以及压力主峰值的提高。
- The actual-3 dB main lobe width is a bit wider than in the ideal case that neglects the element size. 结果表明:阵元宽度对主瓣半功率点宽度的影响非常有限,而且不同的阵元宽度造成的半功率点宽度之间的差异也很小。
- A large solid angle Bragg-curfe Spectrometer(BCS) is introduced in this paper. 本文介绍的大张角Bragg探测器的张角为±8°的锥形腔体。
- At last,a simulation example of main lobe clutter power for low altitude and ... 最后给出了一低空远界理论弹道主瓣杂波功率的仿真样例。
- The unit of solid angle adopted under the System International d'Unites. 国际单位制采用的立体角度单位。
- For short biphase codes,the main lobe to sidelobe ratio of pulse compression is low,so sidelobe suppression is necessary. 二相码信号是一类常见的脉冲编码信号,但码较短时,匹配滤波的主副比不高,需要采用旁瓣抑制技术。
- Based on uniform line array,the sonar equation of active sonar beam main lobe and side lobe interfered by noise-jammer are presented. 研究了噪声干扰器对鱼雷主动声呐的对抗原理,以等间隔直线阵为例,分别给出了干扰器对鱼雷主动声呐主瓣和旁瓣的干扰方程。
- The solid angle is this component divided by the square of the length of this line. 立体角就是这个分量除以这条线的长度的平方。
- The directivity of forming beam are prominent, the width of main lobe is distinct, and producing wavy plan with more powerful, which make for scanning in space. 形成波束指向性突出，主瓣宽度明显，延时产生的波阵面能量较强，有利于空间扫描。
- It covers geometrically 86% of the 4t solid angle and has very low detection thresholds. 整个探测器系统轴向对称排列，工作在真空中。
- Light collecting efficiency of PMT in the position is in proportion to solid angle of the PMT at the position. 光电倍增管对于某位置的光收集效率与光电倍增管对此位置所张的立体角成正比。
- The ratio of the flux emitted within the solid angle defined by the beam spread, to the bare lamp flux. 由光束角限定的立体角内辐射出的光通量与裸光源光通量之比。
- Virtually LPI guide radar is a radar which stacks up against with ESM receiver of target in system detection sensitivenes,therefore in the system design it should consider the technology measures emphaticaly to ensure its antenna main lobe LPI capability. LPI制导雷达实质上是一种从系统上与目标的ESM接收机进行探测灵敏度较量的雷达,因此在系统设计上应着重考虑使其天线主瓣LPI的技术措施。
- The brightness or luminance of an object is defined as the luminous flux emitted per unit area of the object into unit solid angle. 物体的亮度或发光率定义为物体面积发射到单位立体角内的光通量。
- This method more effectively suppresses spatial nonstationary and stationary noise than the adaptive null-forming beamformer method by using a rotatable main lobe in the 2-D plane. 该方法克服了自适应零限波束形成只能抑制空间相干噪声的缺点,并得到可在二维平面上旋转的波束主瓣。
- In the other hand, after pulse compression processing, the output signal's main lobe will be extended and its amplitude or phase will be modulated, and the range resolution will descend too. 由于信号带宽的损失，脉压输出回波信号的主瓣展宽，距离分辨力下降；另外，主瓣幅度或相位还会受到调制。
- Lumen: The unit for measuring luminous flux. One lumen is the flux emitted in one solid angle by a point light source of one candela. 流明:量度光通量的单位。1流明是由1烛光的点光源在1立体角内所发出的通量。
- Simulation results show that with 13 unit lasers, a beam with the flatness of less than 1% in the optimizing region can be achieved.The main lobe contains over 95% of the total power. 计算结果表明：13个单元光源所合成的远场光束可在优化区域内达到平坦度小于1%25，对应主峰包含95%25以上的总能量。
- Using the grid ionization chamber method and small solid angle method,the number of 238U nucleus in the highly pure U3O8 sample is determined. 用屏栅电离室法和小立体角法测量了高纯度U3O8样品中的238U核素数目。
- IJF coding refers to converting digital baseband signal into Intersymbol Interference and Jitter Free baseband signal.It has the features of narrower spectral main lobe and faster roll off. IJF编码是一种将基带信号转换为无符号间干扰和抖动的信号，其主瓣窄，频谱滚降快。
