您要查找的是不是:
- Creating the archimedean spiral geometry seems to be a big problem to me. 创建阿基米德螺旋几何似乎一大问题me.
- A new-type planar Archimedean spiral antenna,the zigzag planar Archimedean spiral antenna,is presented. 对一种新型的平面阿基米德螺旋天线--锯齿状平面阿基米德螺旋天线进行了研究。
- With the plane Archimedean spiral antenna a calculation of the current on the antenna as well as its radiation is carried out and its frequency independence was verified. 并以平面阿基米德螺旋天线为例 ;计算了天线上的电流分布和辐射特性 ;验证了天线的频率无关特性 .
- We designed an Archimedean spiral antenna to receive the UHF signals, andbuild the UHF detection system with the TDS-684C digital oscilloscope to meet theneed of the laboratory study. 为了试验室研究的需要,研制了阿基米德螺旋天线传感器,并和 TDS-684C数字示波器一起组成了特高频检测装置。
- On the basis of the analysis of the planar equiangular spiral antenna and the Archimedean spiral antenna, we induce a kind of equiangular spiral antenna terminated by Archimedean structures. 其次,为了实现天线口径的小型化,对平面等角螺旋天线与平面阿基米德螺旋天线的电特性进行对比分析,仿真设计了等角螺旋天线始端终端阿基米德化的复合结构螺旋天线,这种天线一方面改善了等角螺旋天线的低频与高频特性,另一方面在一定程度上克服了阿基米德螺旋天线臂长,传输损耗大,效率低的缺点。
- In this paper, Archimedean spiral antenna is analyzed using a mixed potential integral equation, and the equation is solved by the moment method incorporating with curved piecewise triangle sub-domain basis and pulse testing functions. 从混合位积分方程出发,采用矩量法结合曲线分段的三角基函数和脉冲检验函数分析了阿基米德平面螺旋天线,给出了输入阻抗,电流分布以及辐射方向图结果。
- The mathematical model was verified in experiment with the method of indirect squeeze cast Archimedean spiral proof sample. And the experimental results show that the maximum deviation between the theoretical value and measured value is less than 8%. 采用间接挤压铸造阿基米德螺旋线试样的方法对该数学模型进行了实验验证,实验结果表明:理论计算值与实验测定值之间的最大偏差小于8%25;
- The moment method analysis of the plane Archimedean spiral antenna 平面阿基米德螺旋天线的矩量法分析
- Analysis and design of a new-type planar Archimedean spiral antenna 一种新型平面阿基米德螺旋天线的分析与设计
- The principle of this method is to use Archimedes spiral to approaching ellipse. 该方法的实质是用阿基米德螺旋线去逼近离散椭圆。
- At first the antenna is an ultra?wideband double-armed Archimedes spiral antenna and fed by 50 ohm coaxial-cable. 文中首先设计了工作频带为1.;5~12GHz的平面阿基米德螺旋天线;其天线直径为80mm;为了使天线输出端阻抗与50?
- Two calculating methods of straight line and Archimedes spiral approximating involute are introduced. 介绍了用直线及阿基米德螺旋线逼近渐开线的两种方法。
- Study of Archimedean Spiral Method for Testing Thermoplastics Fluidity 塑料流动性能的阿基米德螺线测定法研究
- The radiation fields of the Archimedean spiral antenna are derived by 本文用螺旋的半圆近似法计算了阿基米德螺旋天线的辐射场。 应用几何绕射理论(GTD)导出了机载螺旋天线辐射场的计算公式。
- This paper produces a new way of grinding the hole of a helix flute Archimedes spiral hob: a bob is orientated in three tapers. 介绍了一种采用三圆推销定位磨削阿基米德螺线滚刀内孔的新方法,该方法避免了圆周齿距误差和螺旋槽导程误差的影响。
- This article deals specially with the determination of the, basic parameters of involute cylinder gears,Archimedes spiral worms and worm wheels when measuring them. 本文是对渐开线圆柱齿轮和阿基米德螺线蜗杆及蜗轮在测绘工作中如何确定其基本参数而进行的专题探讨.
- Analysis of Archimedean spiral antenna using moment method with curved segmentations 曲线分段的矩量法分析阿基米德平面螺旋天线
- Military budget continue to spiral. 军费预算继续上升。
- Principle of Archimedes spiral. 阿基米德螺线原理:
- Military budgets continued to spiral. 军事预算继续急遽增加。