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diameter of aperture
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  孔径
     The application of double frequency laser on the ultra precision measuring system of diameter of aperture
     双频激光在超精孔径测量中的应用
短句来源
     A ultra precison measuring system for diameter of aperture based laser wave length was presented. The resolution over 0.01(m and the accuracy over over 0.1μm was obtained in the range 8mm 50mm by means of double frequency laser interference technique.
     一种以激光波长为基准的小孔孔径超精测量系统 ,采用双频激光干涉技术、温度误差实时修正技术和符合阿贝原则的合理布局 ,在 8mm~ 5 0mm的范围内实现 0 .0 1μm的分辨力和 0 .1μm的测量精度。 该方法已成功应用在惯性仪表零件孔径及垂直度的超精测量中。
短句来源
     In this thesis, the optimized hybrid antenna system which is brought up by reference, i.e.: the hybrid antenna system, in which the diameter of aperture is 60λ, the diameter of feed array is 30λ. From the results, we can conclude that when the scanning angle is within the range of ±20°, the beam keeps the same and the system realizes wide-scan.
     本文就文献中优化的混合天线系统,即:反射面孔径的大小为60λ,馈源孔径面的大小为30λ的混合天线系统的波束形成进行分析,由分析结果可以看出:这种天线在±20°扫描角范围内,波束形状基本保持不变,实现了较大角域内的波束扫描。
短句来源
     RESULTS: Under the condition of fixed subregion and diameter of aperture,the selections of binders and thickness of spray painting were key factors concerning the release period of helicid.
     结果:体外溶出实验表明三维打印技术在合理的分区设置与孔径大小情况下,能够通过黏结剂的选择、喷涂层厚的变化、喷涂次数的调节等多种方式调节馅饼型零级控释片的释药周期。
短句来源
     It also shows that the transmission coefficient changes with the diameter of aperture.
     同时也研究了透过率有效系数随孔径变化的情况.
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  “diameter of aperture”译为未确定词的双语例句
     Only when the diameter of aperture is large enough,the center lober of an apertured Bessel beam can maintain "non-'divergent' within some distance; "
     只有当阑孔足够大时,截取后的有限直径“无衍射”光束在一定范围内仍具有中心光斑不发散特性;
短句来源
  相似匹配句对
     Study on the Effects of Aperture's Diameter and Number on Package
     孔径和开孔数目对打孔膜包装效果的影响
短句来源
     was ~ 4mm for 2mm diameter aperture.
     对于2mm直径铅准直孔的空间分辨率(FWHM)约为4mm。
短句来源
     It also shows that the transmission coefficient changes with the diameter of aperture.
     同时也研究了透过率有效系数随孔径变化的情况.
     Simulation of Coupling Aperture Diameter and Its Influence to Filter Properties
     滤波器耦合槽直径对其性能的影响仿真
短句来源
     and the fruit diameter, T.
     果实直径、T.
短句来源
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  diameter of aperture
Symptoms are those of recurrent non-bilious vomiting and vary according to the diameter of aperture of the membrane.
      


This article theoretically introduces the calculation method of the diameter of aperture of porous glass,and the parameters which influence the diameter of aperture are also dis- cussed.It may be favourable to process control.

本文从理论上介绍了多孔玻璃孔径计算方法,且讨论了其影响参数,有利于工艺控制。

In China's research and development of precision radar tracking system, it has become urgent to solve the problem of suppression of angle scintillation. Computer simulation shows that the research results presented in this paper appear to be promising for meeting this urgent nced.The well-known n-element series model, consisting of a series of passive short dipoles, appears to the author to be too complicated. So the author proposes a simplified two-element-short-dipole model of target.The author uses this simplified...

In China's research and development of precision radar tracking system, it has become urgent to solve the problem of suppression of angle scintillation. Computer simulation shows that the research results presented in this paper appear to be promising for meeting this urgent nced.The well-known n-element series model, consisting of a series of passive short dipoles, appears to the author to be too complicated. So the author proposes a simplified two-element-short-dipole model of target.The author uses this simplified model to anlyze the scintillation behavior of echo of radar target.Then the author studies how to reduce angle scintillation of target with the utilization of integration of frequency domain and field integration of space wave.Eq.(10) is an important relationship derived by the author on the basis of the simplified model. From eq.(10) the follwing suggcestion may be made:(1) In the design of radar system, when suppression is to be achieved, the designer should select chirp or frequency diversity system.(2) When △f/ f<< 1, it is bighly beneficial to suppression to select a relatively large value of △f(△fisbandwidth of frequency modulation radar).(3) Provided that the requirements of radar system structure are satisfied, the field intogration of space wave of radar echo should be increased by increasing D, the diameter of aperture of radar antenna.At the cud of the paper a numerical example is given. The author takes D=15 cm, △f=515.464 MHz.r=200m.Then the author performs computer simulation and uses eq.(13) to compute e (average disalignment of angle scintillation of target). For this particular numerical example, simulation results show that e can be reduced by 15.24 dB with the suggested measures of this paper.

在n个无源短偶极子串列模型的基础上给出了目标二元短偶极子简化模型,并利用求雷达线性调频的宽带频率均方根和目标回波相位波前孔径面场均方根的方法,分析了抑制目标角闪烁的有效途径和方法.最后给出了计算机的仿真结果.

In this paper,three viewpoints have been explained:non-diffracting beam isn't a "non-divergent" beam;Only when the diameter of aperture is large enough,the center lober of an apertured Bessel beam can maintain "non-'divergent' within some distance; "non-diffracting limit"s is not proper.

本文提出以下观点:“无衍射”光束并非“不发散”光束;只有当阑孔足够大时,截取后的有限直径“无衍射”光束在一定范围内仍具有中心光斑不发散特性;“超衍射极限”提法欠妥.

 
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