1) pattern
[英]['pætn] [美]['pætɚn]
方向图
1.
Modifying MOM-UTD with PO to Compute the Pattern of the Airborne Waveguide Slot Array;
利用PO修正MM-UTD计算机载波导缝隙天线阵的方向图
2.
MIMO Antenna Design for Radiation Pattern;
MIMO天线方向图的辐射鲁棒性设计
3.
Combining UTD with MM for pattern prediction of the antenna in complex environment;
UTD结合MM计算复杂环境中天线的方向图
2) radiation pattern
方向图
1.
Impedance characteristics and radiation patterns of conformal cylindrical bow-tie microstrip antennas;
柱面共形蝶形微带天线的阻抗特性和方向图研究
2.
From the Law of conservation of evergy,a simple formula for calculating its radiation pattern is deduced.
为了解决标准卡氏天线的驻波特性差的问题，本文分析了副面母线为双曲线的环焦天线，给出了这种天线的最佳设计公式，并从能量守恒定理出发，导出了计算其方向图的简单表达式。
3.
The electrical parameter and radiation pattern are optimized and simulated.
研究了一种用于中短距离通信的螺旋天线,分析了螺旋天线特别是轴向模螺旋天线的基本电磁辐射特性,介绍了有限元方法的基本理论和数值计算过程,并结合有限元法对螺旋天线进行了设计、优化,仿真出该天线的电参数和辐射方向图,然后将设计的天线模型进行通信实验。
3) directional image
方向图
1.
Gradient based weighted averaging algorithm for compution of fingerprint directional image;
一种基于加权平均梯度的指纹方向图算法
2.
Fingerprint minutiae extraction algorithm combining with directional image;
结合方向图的指纹特征点提取
3.
In order to enhance the quality of fingerprint image in the automatic identification system, the gradient method is adopted to calculate the directional image of fingerprint.
在自动识别系统中,为了消除噪声以提高指纹图象的质量,采用梯度法计算指纹图像的方向图,通过构造一组方向滤波器对指纹图像进行滤波,然后提出了一种针对方向滤波后的指纹图像消除噪声的方法,试验结果表明了该方法的有效性和实用性。
4) direction image
方向图
1.
Study on direction image repairing algorithm based on shape character of fingerprint;
基于指纹纹线形态特征的方向图修正算法研究
2.
Fingerprint image play a very important role in fingerprint preprocessing,feature extraction and fingerprint classification In this paper,many fingerprint images are classified by using RBF neural network It is efficient and feasible to classify fingerprint based on direction image The method is very robust and can produce good result
指纹的方向图在指纹的预处理、特征提取以及指纹分类诸方面发挥着重要的作用。
3.
In this paper,a direction image method is proposed to segment the fingerprint image.
本文提出了一种用方向图法分割指纹图像的方法,并给出了提取指纹图像方向信息的有效方法,用低通滤波器对求得的方向进行平滑,对平滑后的指纹方向信息与预定方向逼近,使得求到的指纹方向信息更准确,更接近实际。
5) antenna pattern
方向图
1.
According to the relation ship of the antenna pattern and the aperture field, the mechanism of how the aperture distribution affects the antenna sidelobe level is analyzed and discussed through theoretical analysis and simulation calculation.
该文根据天线方向图与其口径场之间的关系,通过理论分析和仿真计算,分析、讨论了口径场分布影响天线副瓣性能的主要机理。
2.
The results demonstrate that the resonance frequency of antenna shifts higher frequency,the antenna pattern is improved obviously,the forward gain increases,the back lobe decrease,3 dB beam width gets narrower.
通过建立模型数值仿真了EBG结构对天线谐振频率、方向图的影响规律及有EBG结构时曲率对天线性能影响。
6) directional pattern
方向图
1.
Considering the limit of the space of the cylindrical equipment cabin to the airborne phased array radar antenna,we studied the directional patterns of the rectangular grid circular planar array antennas.
针对机载相控阵雷达天线受机头圆柱形设备舱约束的条件,研究了矩形栅格圆口径平面相控阵天线的方向图,建立数学模型并对其进行了公式推导和计算机仿真。
2.
The rectangular waveguide slot array is analyzed and directivity function and directional pattern are given in this paper.
文中分析了矩形波导缝隙天线阵 ,给出了方向性函数及方向图 ,编制了分析软件 ,形成了方向图数据文件供通用软件调用。
3.
In this paper,based on a special requirement of the directional pattern,a method is presented that the dielectric is injected into the interspaces between the antennas in order that the phase between them is identical in the far field.
提出了在两副天线之间加入介质的方案,使两副天线在远场相位一致,从而实现了方向图的特殊要求,并通过计算机仿真,得到的结果与预想的一致。
补充资料：图的减缩图(或称图子式)
图的减缩图(或称图子式)
minor of a graph
图的减缩图(或称图子式)【.皿以ofa脚户;MHHoPrpa中a」【补注】设G是一个图(graph)(可以有环及多重边).G的一个减缩图(nullor)是从G中接连进行下述运算而得的任何一个图: i)删去一条边; 五)收缩一条边; 说)去掉一个孤立顶点. NRobe由on与P.D.Se脚aour的图减缩定理(脚Ph nl的。r theon习11)如下所述:已知有限图的无穷序列G，，GZ，…，则存在指标i
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条