| 1. | By this way , the exact solutions of parabolic lossless ntl can be gained
用这种等效方法可以求解抛物线型无损非均匀线的精确解。 |
| 2. | Using these formulas , we can calculate the sensitivity of arbitrary output with respect to arbitrary parameters of the network which includes parabolic ntls
利用所推导的灵敏度公式和已有的伴随灵敏度公式，可求得含抛物线型非均匀线网络中任意输出对任意参数的灵敏度。 |
| 3. | Stress distribution at cross section of transverse uniformly distributed load and non - uniformly distributed load applied to concrete cylinder by finite element method is analyzed
摘要采用有限元的方法计算分析了混凝土圆柱体在受横向均匀线荷载和非均匀线荷载时其横截面上的应力状况。 |
| 4. | 4 . problem of circular array ’ s high side - lobe ( relative to main - lobe ) and the lower depth of zeros is resolved using mode space transform , which changing uniform
4 .利用模式空间变换将均匀圆形阵列转化成虚拟的均匀线阵,解决了圆形阵列副瓣电平较高(相对于主瓣) 、零点深度相对较浅的问题。 |
| 5. | The performance of beamspace high - resolution direction - of - arrival ( doa ) estimation is analyzed . a dense beamspace music ( dbmusic ) algorithm for the uniform linear array ( ula ) is proposed
深入分析了波束域高分辨方位估计性能，捉出了一种基于均匀线列阵的密集波束域music ( dbmusic )法。 |
| 6. | The results show that the area of cross - sectional tensile stress exceeds 90 percent , and the value of tensile stress is relatively uniform when transverse distributed load and negate mean distributed load are applied to cylinder
结果显示，在横向均匀线荷载和非均匀线荷载作用时，圆柱体横截面90 %以上的面积为拉应力，且拉应力大小相对比较均匀。 |
| 7. | The three - dimension dbf of circular array and cylinder array are presented . we adopt equivalent with uniformity linear array ( ula ) in cylinder beam forming , and compare pattern of directional elements with of omni - directional elements
在圆柱阵的波束形成仿真中,采用了等效均匀线阵的方法,简化了数字波束形成的计算量,并且还对有向阵元和全向阵元在阵列波束形成中的影响进行了仿真比较。 |
| 8. | The method which eleminates the doa ambiguity using the nula is presented in this dissertation . the theory and the algorithm of the doa ambiguity resolution is showed . the re - configurating array elements location is not necessary in this algorithm , and the ambiguiry is well suppressed
本文讨论了通过非均匀线阵阵列设置解模糊的方法,阐述了变频率解测角模糊的原理,并给出一种算法,该算法不需要对阵元位置进行设置,且对模糊有较好的抑制。 |
| 9. | Based on theoretical studies on these algorithms , by means of computer simulation and the water tank experiment , we analyzed the performance of these algorithms in uniform linear array , which included the separation and reconstruction of source signals and doa estimation performance
在详细分析各种算法内在机理的基础上，针对均匀线列阵，通过大量的计算机仿真实验与水池实验数据处理结果，分析、讨论了几种算法对目标源信号的分离、捕获能力以及方位估计性能。 |
| 10. | Broadband source location method is investigated by using signal - phase - matching principle , and simulations and experiments are carried out to show the validity of the method ; two high resolution algorithms of broadband signals are proposed , which are the dft interpolation algorithm and the frequency invariant beam space algorithm . the proposed algorithms have no requirement for prior information of source locations , so the results of doa estimation can be unbiased ; a method of temporal - spatial averaging , which can improve the performance of doa estimation for uniform linear arrays , is given . this method can be applied in the most narrowband or broadband eigen - structure based high resolution algorithms
提出了利用信号相位匹配法的宽带信号方位估计方法并从仿真和实验两方面对其进行了验证；提出了基于dft插值的和基于频率不变响应波束域的两种宽带信号高分辨方位估计算法，这两种方法在进行方位估计时均不需要进行方位预估，从而避免了因角度预估可能带来的估计偏差；最后提出了一种提高均匀线列阵方位估计性能的时空平均法，该方法可适用于多数窄带或宽带的特征结构类高分辨方位估计算法中。 |
