轴比

仿真的结果显示，它的阻抗带宽、轴比带宽、增益和相位中心稳定性等性能参数都较好。

Good performances of Impedance Bandwidth , Axial Ratio , Gain and Phase center stability have been obtained by simulation of HFSS .

设计的组合天线具有良好的电磁兼容性，仿真结果表明该天线对于接收“北斗”和GPS信号都具有较好的圆极化轴比和增益方向图。

The simulation indicated that the polarization axial ratio and antenna gain pattern of this antenna are good for " BD-1 " signal and GPS signal .

通过调整椭圆的轴比可以实现E面和H面波束宽度独立可控，并且实现更宽的扫描范围。

The beamwidth in E-and H-planes can be individually controlled and wider coverage is obtained through adjusting the axial ratio of the ellipse .

Ti-15-3合金热变形过程晶粒轴比的预测

Prediction and experimental research of grain axial ratio of Ti-15-3 alloy during hot deformation

结果表明，添加剂浓度和反应液初始pH值对纺锤形α－Fe2O3的轴比具有明显的影响，并且当添加剂浓度增加到一定值时，纺锤形α－Fe2O3出现解体。

The results show that there is a remarkable effect of additive concentration and pH of precursor on axial ratio of spindle α Fe 2O 3.The disintegration of spindle α Fe 2O 3 is observed with increase of additive concentration .

x增加，反铁电四方相的晶轴比a/c和晶胞体积减小，结果是扩大了可以发生电场诱导反铁电-铁电相变的反铁电相区。

Addition of x volue reduces the crystal axis ratio a / c and the volume of tetragonal structure . As a result , it extendes the tetragonal antiferroelectric field that can transform into rhombohedral ferroelectric phase by electric field .

通过X射线衍射还发现，深冷处理可使马氏体轴比和碳含量下降，促使新相碳化物MC析出。

It is discovered by X ray diffraction analysis that the c / a ratio and carbon quantity of martensite in treated wearing surface is lower than those in untreated wearing surface , and cryogenic treatment can enforce MC to precipitate .

结果CIN各组及宫颈癌各组的细胞核面积、周长、直径、圆度四项参数均大于正常对照组（P0.05）。长短轴比无显著差异。

Results It was found that the nuclear area , perimeter , diameter and roundness in different groups of cervix cancer and cervix atypical hyperplasia were all significantly higher than those in normal control ( P0.05 ) .

测量结果表明，天线的阻抗带宽（电压驻波比，VSWR≤2）和圆极化带宽（轴比AR≤3dB）分别达到18.8%和12.3%。

The impedance bandwidth for VSWR ≤ 2 and circular polarization bandwidth for axial ratio AR ≤( 3 dB ) reaches 18.8 % and 12.3 % , respectively .

且采用电磁场仿真软件HFSS，计算了振子圆极化馈源的增益和圆极化轴比，仿真结果表明设计实用、可行。

The gain and circular polarized axial-ratio of the crossed dipoles is calculated with the electromagnetic simulation software HFSS , the results indicate that the design is reasonable and practical .

用FEKO软件对其辐射特性进行仿真，得到天线的方向图、增益和轴比等辐射特性。

Its radiation properties including radiation patterns , power gain and axial ratio are simulated using the software FEKO .

结果：通过比较6MV光子束三个标准方野的深度剂量和离轴比分布的计算结果和测量结果，取得了较好的吻合。

RESULTS : Depth dose and profile source calculations for 6-MV photon beams , for 3 standard square field sizes , were in good agreement with measurement .

获得的实测结果为：中心频率为10GHz，电压驻波比小于2的带宽为33.85%，圆极化轴比小于3dB的带宽为22.4%。

The experimental results show that the frequency bandwidth is 22 . 4 % for a 3-dB axial ratio criterion and is 33.85 % for a VSWR < 2 criterion at the central frequency 10 GHz .

开发的软件（下称FD96）应用于X线立体定向放疗，不仅测试、改进了软件的性能，同时探讨了立体定向放疗中两个关键性问题：靶点位置精确度分析和小野离轴比测量。

Using the developed software ( designated FD96 ) in stereotactic therapy , not only did we test and improve its functions , but also studied two key data figures in stereotactic therapy : off-axis ratio measurements and precision and accuracy of target points . 1 .

球状和低轴比棒状碳酸钡纳米微粒的制备

Preparation for Spherical and Low Axis Ratio Rodlike Barium Carbonate Nanoparticles

平野和楔形野的离轴比测量与验证

Measure and check the off-axis ratio of open and wedge fields

研究了射野深度剂量和离轴比计算的插值和拟合方法。

Revised numerical processing methods for depth dose and off axis ratio .

宽角扫描圆极化相控阵天线轴比的优化设计

Axial Ration Optimization of Wide Scan Phased Array Antenne

轴比为1：1.32、1：1.65、1：1.75和1：1.86；

The axis ratio was 1:1 . 32 , 1:1.65 , 1: 1.75 and 1: 1.86 respectively ;

而且不均匀程度随椭圆度（轴比）的增加而增加。如果中间工序过渡形状不合理又会加剧这种不均匀程度，从而引起局部材料的堆聚或破裂。

Inappropriate intermediate blank form will enlarge the non-uniform extent and makes blank local gather or rupture .

离轴比为10.5%，略优于费米实验室的（14／）。

OAR is 10.5 % , which was slightly better than 14 % of Fermi lab ′ sresult .

其中，读写器天线的研究和设计重点关注阻抗、增益、轴比三个参数，标签天线的研究与设计重点关注阻抗、增益、辐射对称性两个参数。

In reader antenna design , impedance characteristics , antenna gain and axial ratio are three key parameters .

平面等角螺线天线方向图极化椭圆轴比与臂长的关系

The relation between elliptical polarization with axial ratio of radiation pattern for equiangular spiral antenna and its arm length

分析了该天线的反射损耗曲线，辐射方向图，输入阻抗，极化轴比等重要参数。

The reflection loss curve , radiation patterns , input impedance and axial ratio of the antenna were given .

目的：探讨用离轴比曲线分析电子束照射野笔形束模型能量展宽函数的方法。

Objective : To derive the energy spread function of the electron pencil beam model from the measured beam profiles .

用这些探测器测量了电子直线加速器在方型和圆形野情况下的几种重要的剂量分布，如百分深度剂量、组织最大比、离轴比等。

The ion chamber and film were used as detector during the measurements of PDD , TMR and OAR , etc.

与校正前的结果相比，轴比带宽从16.2%提高到22.4%。

Compared with the results before correction , the bandwidth of the axial ratio increases from 16.2 % to 22.4 % .

对同轴馈源方向图、电压驻波比和轴比进行了测试，测试结果与电磁仿真结果比较吻合。

Comparing the EM simulation and experiment results showes a good agreement in directivity pattern , VSWR and axial ratio of circular polarization .

给出理论和实验结果，证明了这种四层曲折圆极化器可以在倍频程范围内得到良好的低轴比、低损耗特性。

The theoretical and experimental results are presented , which show the low axial ratio and low loss characteristics over octave frequency band of the polarizer .

认为椭圆曲线是一种较好的型式，并研究了合理的长轴和长短轴比。

We con - sider the elliptic curve a better shape by calculation and have studied proper long axes and the ratio between long and short axes .