difference beam造句

例句与造句

1. they are the property of sum and difference beams, the errors of the elements and channels and different pulse repeating frequency ( prf )
   这些因素包括和、差波束的特性、阵元和通道的误差、不同的脉冲重复频率(prf)。
2. their interest in ? a-stap stemmed from the fact that antenna engineers have excelled in the design of high performance sum and difference beam whether for phased array or for reflector antenna
   人们对这种特殊的空时二维处理感兴趣的原因是无论相控阵天线系统还是反射面天线系统，天线工程师都可以设计出性能很好的和、差波束。
3. aiming at the problem of angle motion estimation in monopulse three-dimension imaging, a novel angle motion parameters estimation method based on the inverse synthetic aperture radar imaging for difference beam is presented
   摘要针对单脉冲三维成像时的目标角运动估计问题，提出一种基于差波束逆合成孔径雷达成像的新的角运动参数估计方法。
4. the effective index method is applied to simplify an awg structure from 3d to 2d . two simulation methods are presented in detail based on the gaussian beam propagation formula and the finite difference beam propagation method
   文中采用等效折射率方法把三维结构简化为二维结构，然后分别基于高斯光束的传播和有限差分光束传播方法(fd-bpm)，给出了两种对整个awg进行全局模拟的具体方法。
5. using the relation between spectrum width and entropy and the different contributions devoted by each angle motion parameter to the echo spectrum width of the difference beam, the global optimal estimation is obtained through searching the angle motion parameters of zero and higher order via max-entropy and min-entropy respectively
   该方法利用了各阶运动参数对差波束回波谱宽度的不同贡献以及熵与谱宽度的关系，通过最大熵和最小熵分别对0阶和1阶以上角运动参数进行搜索，得到全局最优估计。
6. It's difficult to find difference beam in a sentence. 用difference beam造句挺难的
7. and the results of them have been analyzed, from basic one to sum-difference beam measurements which are popular in phased array radar . then there is a deep investigation on the application of sum-difference amplitude comparison in target tracking in the multi-path environment . finally, the origin of multi-path effects is analyzed and some methods to eliminate the multi-path effects are introduced briefly
   从基本的方法入手,过渡到相控阵雷达常用的单脉冲和差波束法,分析了这些方法各自的测角效果;着重研究了多径效应影响下比幅和差波束法在目标跟踪中的运用,并分析了多径效应的形成原因,简单介绍了几种常用的多径消除技术。
8. the finite difference beam propagation method ( fd-bpm ) can simulate the performance of the waveguide accurately . single mode rid waveguide structure parameters are derived by variational-effective index method; fd-bpm and its transparent boundary condition ( tbc ) are concerned, and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed; finally we summarize the characteristic of the y branch
   本文先利用变分有效折射率法推导出满足单模传输的脊形波导结构参数;接着介绍了有限差分束传播法及求解的透明边界条件,同时分析了将三维结构转化为二维结构的有效折射率法,最后对y分支的特性进行了模拟。
9. on the base, we designed the waveguides " structure and fabrication parameter . and in the design of symmetric y-branch of proton-exchange s ingle-y phase linbo3 modulaor, we used finite difference beam propagation method to analyze and compare the optical transmission loss of different s-bend y-branch
   本文对质子交换linbo_3单y相位调制器的重要部件y分支进行了深入的研究，比较了不同s弯曲形式的y分支过渡长度与损耗的关系，并计算出间距250m时的最小弯曲长度。
10. variational-effective index method and finite difference beam propagation method ( fd-bpm ) are both practicable waveguide simulation tools . the variational-effective index method is based on mixing the variational method ( vm ) and the effective index method ( eim ), it can be used with very accuracy to simulate the field distribution
    变分有效折射率法是变分法(vm)和有效折射率法(eim)的结合,它能够很精确地模拟光场分布情况;有限差分束传播法则能够准确地模拟波导的性能。
11. second, the mode fields of a strip waveguide and some slab waveguides have been simulated by applying finite-difference time-domain ( fdtd ) method . the curvature radius; vicinity coupling; transition loss and power attenuation of a s-shape bend waveguide have been analysed numerically by employing wide angle finite-difference beam propagation method ( fd-bpm ), as well as the coupling loss of optical fiber and waveguide . in addition, the framework of the s-shape waveguide laser has been
    其次,应用时域有限差分法,结合波导模式理论对条形与平面波导进行了模场仿真;应用广角有限差分光束传播法,对s形弯曲波导的曲率半径、邻近耦合、过渡损耗、功率衰减以及波导与光纤的各种耦合损耗进行了数值分析,并在此基础上,对s形波导激光器的结构作了初步设计。
12. in this paper, the foundamental principles of fd _ bpm ( finite-difference beam propagation method ) used to simulate and calculate the process of beam propagation is first introduced . then ， the theory of boundary condition is carefully presented . based on those theories mentioned above, a new kind of fd _ bpm arithmetic is brought forward . compared with the traditional arithmetic, this one has much more advantages . in virtue of the new arithmetic, author accomplished the whole simulating designs with two kinds of optical splitter ( stright y-junction optical splitter and sine-type optical splitter ), including propagation field simulating, vital parameter calculating, acquired some optimized waveguide parameters ， and finished the template by those results at last
    本文主要借助这种改进的fd_bpm算法，对两种结构的光分路器（直y型光分路器，上升正弦型光分路器）进行了器件设计的软件仿真，包括对两种结构光分路器传输场进行模拟，并对两种结构光分路器的重要参数，如波导宽度，分叉角，纵横比，损耗进行了仿真计算；得到了一些有价值的优化波导结构参数值，根据这些优化值设计制作了光刻模板。