英汉例句

• a modified range-doppler algorithm for spaceborne sar with large squint angle is presented and the quality of images of simulated point target echoes gained by two algorithms are list in the paper.

  提出了一种适合大斜视角星载sar系统的改进距离-多普勒算法，并给出了处理仿真点目标数据得到图像质量的比较。

• the simulation results prove that roll error and its stabilization and spaceborne sar squint angle are the key factors to sar resolution performance errors. the conclusion is valuable t…

  分析仿真结果表明，滚动向指向误差和稳定度以及星载sar中心视角对分辨特性影响较大，该研究结果对于卫星总体参数确定和优化设计具有参考价值。

• signal properties of spaceborne spotlight sar were discussed. the relationships of centroid doppler, doppler bandwidth and prf(pluse repetition frequency) with squint angle were analyzed.

  分析了星载聚束式合成孔径雷达（sar）的信号特性，主要研究了多普勒中心频率、多普勒带宽以及脉沖重复频率（prf）与斜视角的关系。

• rd algorithm based on minimum entropy criteria carries out the correction phase errors caused by high squint angle via searching error coefficients for improving the imaging focus effect.

  基于最小熵準则的自聚焦rd算法在一般rd算法的基础上引入最小熵準则来补偿由于大斜视角引起的相位误差，改善图像聚焦效果。

• these conclusions are important for choosing suitable radar system parameters such as center frequency , resolution and imaging squint angle in engineering design.

  这些结论对工程设计牛选择合适的工作参数，如载频、分辨率、成像斜角等具有较为重要的参考价值。

• the quality of images of simulated bistatic echoes focused by the algorithm is much better than algorithm based on two-order range model at the case of large squint angle and high resolution.

  最后对仿真点目标双基地回波进行成像处理，结果与基于二阶距离模型的成像算法相比较，证明了本文等效距离模型和成像算法的优越性。

• with the analysis of r-d algorithm, the relationship between the frequency of radar, the signal frequency width and the squint angle is deduced. the result is identified by computer simulation.

  该文通过对r-d成像方法的分析，推导了在r-d成像方法下雷达工作频率，信号带宽与成像角之间的关系，并用计算机仿真进行了验证。

• it is proved that the choice of the reference frequency in ncsa is unique. a multiple-look sar imaging method for the large squint angle is presented.

  指出了非线性cs算法在实际应用中其参考频率的选择是唯一的，并提出了一种在大斜视角下进行多视处理的方法。

• the relationship shows that the maximum bandwidth is limited for these algorithms and becomes narrow when the center frequency is lower and the imaging squint angle is larger.

  这种关系表明雷达可用的信号带宽是有一定限制的，随着工作频率的下降和成像斜角的增大，可用的信号带宽会变得越来越小。

• the special relationship among signal bandwidth, center frequency and imaging squint angle in the range-doppler imaging algorithm and other methods is also presented in the chapter 3.

  本章通过分析提出了距离多普勒等成像方法中信号带宽、工作频率和成像斜角之间存在的特定关系。