| 1. | Based on the fast algorithm , echo from multi - aperture is simulated
并在此基础上仿真了多孔径内的回波。 |
| 2. | Measurement method of double - aperture and multi - aperture cores made of magnetic oxides
磁性氧化物制成的双孔及多孔磁芯测量方法 |
| 3. | The main purpose of this paper is obtaining conclusion by via of experiment , because it have not report about multi - aperture tem technology so far
有关多孔径瞬变电磁技术还未见有关文献报道，因此通过模拟实验定性得出结论是本文的主要研究目的。 |
| 4. | 4 . the dissertation studies in - depth the multi - aperture sar mtdi based on along - track interferometry ( ati ) . it presents and describes the detecting processing in sar image domain using double apertures and analyzes the influence of all kinds of factors including ground clutter , noise , signal - to - clutter , range velocity , multi - look processing and etc on the detection performance
4 、深入研究了基于沿迹干涉衅1 ）技术的多孔径sar系统地面动目标检测和成像方法，给出了采用ati方法对两幅sar复图像进行慢速目标检测的完整过程，详细分析了各种因素如杂波、噪声、目标信杂比、目标速度及多视处理等对检测性能的影响，并通过大量的仿真给予验证。 |
| 5. | The second chapter is about model experiment study , it introduces purpose , scheme , equipment and experiment contents having copperplate and copper ball as object by comparability rule experimenting plenty of physical models , deals with experiment data and makes second field attenuation voltage curves first field isoline both single aperture and mutli - aperture in different situation . in the end , it obtains best depth of multi - aperture source
利用相似性准则进行大量的物理模拟实验，实验观测中以铜板和铜球作为目标体，详细介绍了模拟实验研究的目的、方案、使用设备以及实验内容，并对实验数据进行了处理分析，作出了不同模拟条件下单、多孔径的二次场衰减电压曲线和一次场等值线图，找出多孔径作发射源的探测最佳深度。 |
| 6. | The author discusses the phase - preserved sas imaging algorithm , which is the precondition of interferometric processing . several classical sar algorithms used in sas are analyzed . because of the contradiction of the unambiguous range and along - track sampling requirements , multi - aperture technique is widely used in sas
探讨了保相的sas成像算法，它是后续干涉处理的前提，分析几种常用的合成孔径雷达( sar )成像算法在sas中的应用，通过理论和实验比较各自优缺点。 |
| 7. | According to practice of transient electromagnetic operators , this paper will introduce a new multi - aperture transient electromagnetic method integrating a lot of simulation experiment data on the base of its primary theory and transmission rule . in the end , result shows this new method can improve so much direction of electromagnetic field that it increases lognitudinal resolving power
本论文根据瞬变电磁法勘探工作者的实践，利用电磁波运动学特征在讨论其基本原理和电磁波传播规律的基础上，结合在论文过程中进行的大量模拟实验资料，进一步引入了多孔径瞬变电磁发射场源，实验结果分析证明采用瞬变电磁多孔径发射场源改善了辐射场的方向性，提高了瞬变电磁法勘探的垂向分辨力。 |
| 8. | At the same time , the " stop - hop - stop " approximation is no longer valid in sas due to the low speed of sound . the receiver has unavoidable movement , when echoes get to receiver from different distances . in order to overcome the problem , an image forming algorithm of multi - aperture sas is presented in the thesis , which is suitable for the case of non - " stop - hop - stop "
为了解决测距、测速模糊问题， sas通常采用多子阵技术，而且由于sas “停?走?停”假设往往不再有效，即测绘带内不同距离回波到达基阵时，基阵存在不可忽略的运动，所以论文提出了一种“停?走?停”假设不成立条件下的多子阵合成孔径声纳逐点成像算法以得到相位保真度更高的复图像。 |
| 9. | The third chapter is experiment analyses of multi - aperture transient electromagnetic method , it analyzes multi - aperture transient method in theory and discusses radiation direction characteristic of first field by means phased array theory and integrating result of experiment contrast . according to kinematics character it also brings forward similar interference concept and analyzes reason of similar interference phenomenon , it gained footing between similar interference item and depth on the base of it and experiment formula
借助于相控阵原理的思想，结合模拟实验观测值对比结果，对多孔径tem方法进行模型分析，详细讨论了多孔径一次场的辐射方向特性，利用光波的运动学特征提出类相干的概念，分析了多孔径tem辐射源存在类相干现象，推导出类相干实验公式，并得出类相干项与多孔径框边长以及埋深的关系表达式和。 |
