ID 原文 译文
23625 接着用非线性变标法对方位空变性进行补偿； second, the nonlinear chirp scaling algorithm for azimuth focusing is applied to compensating the Doppler modulation rate;
23626 最后用 2 维线性变标算法校正高阶视向速度补偿产生的几何形变问题。 finally, the image geometric distortion is eliminated by 2-D chirp scaling operation.
23627 与传统算法相比，该文算法可在扩展较少数据量的情况下避免插值运算，提高成像效率。 Compared with the traditional algorithm, the proposed algorithm avoids the interpolation under the case of extending a small amount of data, hence the calculation needed is less.
23628 仿真结果证明了算法的正确性和有效性。 The simulation results prove the effectiveness of the algorithm.
23629 为解决在站开式距离的人体隐藏危险品检测问题，利用目标对雷达回波的退极化现象实现对枪支等金属物的远距离检测。 In order to detect concealed body-worn weapon at standoff range, the depolarization effect of radar targets is utilized.
23630 通过测量待测对象的雷达的不同极化方向的回波并计算出检测参量，就可以据此判断待测对象是否携带有隐藏危险品。 By measuring radar echoes of the object at different polarization directions, detection parameters can be obtained and whether the human is carrying concealed weapon or not can be decided.
23631 为验证该方法有效性，设计并研制了一套 140 GHz 宽带极化雷达，并进行了实验测量。 In order to verify the effectiveness of the method, a 140 GHz broadband polarized radar is designed and used to carry out experimental measurements.
23632 实验结果表明：一方面，对于枪支，或者简易爆炸物等退极化效应显著的目标，系统具有较好的检测效果； The experimental results show that, on the one hand, for the firearms, or Improvised Explosive Devices (IED) and other targets that have significant depolarization effect, the system has a better detection effect;
23633 另一方面，对于退极化效应不明显的目标的检测以及检测距离的增加会导致系统的虚警和漏警概率增大， 从而降低检测性能。通过增大发射天线尺寸可以改善检测效果，并且通过检测参量的优化可以提高同等距离下检测性能。 on the other hand, the detection of targets with less depolarization effect and the increase of detection distance will result in the increase of the probability of false alarm and probability of leakage alarm and deterioration of the system performance. The system performance can be improved by increasing the size of the transmitting antenna, and the detection performance at the same distance can also be improved by optimizating the detection parameters.
23634 随着社会信息化水平的提高及不稳定因素的增加，人们迫切需要更加可靠的识别技术对身份进行认证。 With the development of information technology and the increasing demanding of information security, people are urgently in need of more reliable identification techniques for identity authentication.