English translation for "主瓣宽度"
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- main lobe width
Related Translations:
装载宽度: maximum loading width 踏步宽度: tread runtread width 开口宽度: width of jaw opening
- Example Sentences:
| 1. | When the signal frequency is 4688hz , the width of the main lobe of the directivity is 28 degrees and the theoretical value is 26 degrees
指向性测试结果显示,最大值方向和第一对最低点宽度与理论值吻合,主瓣宽度实测28度,而理论值为26度。 | | 2. | At last this paper points out that precision of test can be improved by enhancing reflection level of quiet - zone , and researches the relation of reflection level , precision of test and main lobe of testing radar
最后指出可以通过提高静区静度指标要求到达提高试验精度的目的，并研究了静区指标与被试品主瓣宽度、角模拟精度之间的关系。 | | 3. | First , it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width , side lobe amplitude , elimination of grating lobes ) , amplitude of ultrasonic pressure , element viberation pattern , mutual radiation among elements , efficient test regions , ability to keep accurate and near - field distance and so on . based on the direction of ultrasonic field in ulpa deduced by ourselves . in addition , on the base of integrating all kinds of factors , it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer , and its design programme and interface were compiled
首先在推导超声相控线阵换能器声场的指向性的基础上，就各个晶片几何参数对指向性指标(主瓣宽度、旁瓣幅度、消除栅瓣) 、声压幅值、阵元振动模式、阵元间互辐射、有效检测区域、精确控制能力、近场长度等方面的影响进行了论述，并在综合各方面影响的基础上，提出了晶片几何参数优化设计的原则和方法，编写了设计程序和界面。 | | 4. | The antenna is obtained by extending the longitudinal strip of the fin - line , and etched on a metallized dielectric substrate . it is operating at ka band ( center frequency : 34ghz ) , which has a good agreement between simulated and measured results . its e - and h - plane 3db main lobe beamwidth are 79 . 25 and 80 . 03 degrees respectively with sidelobes less than - 10db
天线工作的中心频率为34ghz , e面和h面测试方向图主瓣宽度分别为79 . 25o和80 . 03o ,旁瓣电平均小于- 10的db ,仿真和试验结果基本一致,所设计天线的各项指标经测试基本达到要求。 | | 5. | In the terms of interpolation , the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character . 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation , the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation , the more number of summation and the more order of interpolation polynomial , the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation , the more of reconstruction time simultaneously , aimed at eliminating the effects of noise contained in projection data , in this paper , author analysis cause and effects of common artifacts . importantly , discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector
在ct图像重建时，选择有限带宽窗有较好的空间分辨率，三角形窗有较好的密度分辨率，选择余弦窗则使得空间分辨率与密度分辨率的折衷；从窗函数的频谱角度来讲，可以用于图像重建的一个良好的卷积窗函数应该具备以下条件： ( ? )小的3db带宽b ，即最小的主瓣宽度； ( ? )最小的旁瓣最大峰值a ； ( ? )最大的旁瓣峰值衰减速度d ；就内插函数而言，临近点内插与线性内插重建图像噪声大，但有较好的边缘与细节； 4 4三次内插、三次b -样条与四次拉格朗日多项式内插图像平滑，局部特性较好。 | | 6. | In chapter 4 , a chebyshev method beamforming for uniform circular arrays ( ucas ) is proposed based on dolph - chebyshev method for uniform linear arrays ( ulas ) . this method is that it computationally efficient which makes it eminently suitable for real - time beamforming and beamstearing applications . we describe the new approach for synthesizing array patterns with guaranteed least sidelobe levels for any look direction
我们对基于均匀线阵dolph - chebyshev波束合成方法进行研究，提出了基于均匀圆阵dolph - chebyshev波束合成算法，即期望信号在任意入射角度时，均能保证同样的主瓣宽度和最小旁瓣电平的阵列方向图合成算法。 |
- Similar Words：
- "主伴音磁迹" English translation, "主瓣" English translation, "主瓣方向" English translation, "主瓣辐射图" English translation, "主瓣干扰" English translation, "主瓣立体角" English translation, "主瓣零点宽度" English translation, "主瓣偏频对消" English translation, "主瓣图" English translation, "主瓣增益" English translation
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