查询词典 helix
- 与 helix 相关的网络例句 [注：此内容来源于网络，仅供参考]
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The quadrifilar helix antenna is widely used in the space communication, as it has globe symmetry band and good circular polarization.
四臂螺旋天线由于其优良的圆对称半球波束特性，良好的广角极化特性，在空间通信中得到广泛的应用。
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A new quadrifilar helix antenna is given. The antenna has four feed ports and the phase difference between two border upon ports is 90 degree. The simulation results indicate that this antenna has a good performance of axial ratio and gain pattern.
为了改善天线的轴比性能，文章提出了一种4臂等幅馈电、相位依次相差90度的天线方案，仿真结果表明，这种天线的增益特性和轴比特性都得到了较大的改善。
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Considering the actual condition on the satellite, the forms of the antennas are defined as quadrifilar helix antenna and microstrip antenna, and their pros and cons are discussed.
其主要内容如下： 1 概述了该小卫星上对各种天线的使用需求，并针对该卫星实际情况，选定天线的形式，即四臂螺旋天线和微带天线，同时论述了它们的优缺点。
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The paper studies a quadrifilar helix antenna with good radiation property and proposes a new one.It has four feed ports and the phase difference between two borders upon ports is 90 degree.
K ilgus在1968年提出的谐振式四臂螺旋天线[1]具有一些引人注目的特点，该天线通过选择适当的物理尺寸以及馈电方式可以形成不同的辐射方向图；此外它还具有重量轻、尺寸小、不需要参考地的优点。
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A Quadrifilar Helix Antenna is adopted for the platform positioning and a horizontal monopole using the cylindrical wall of the cavity as its ground is adopted for communication.
定位天线采用四绕螺旋天线；通信天线采用以腔壁为地的水平单极振子。
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quadrifilar helix antenna ; circular-polarization ; axial ratio
它有四根旋臂和顶部的两根直臂，每根旋臂的旋转角
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When human DNA begins to rebundle as a twelve-stranded helix system and this information is acted upon, there will be incredible power.
当人类的 12 条 DNA 螺旋系统开始重新连接一起—而信息就开始起作用，那将有着不可思议的力量。
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Analysis online showed that its secondary structure was rich with helix and extended-beta, and phylogenetic tree revealed that it clustered closely with Sparus aurata.
斜带石斑鱼FAD和ELO全长cDNA序列的获得，为今后进一步研究其高不饱和脂肪酸合成途径奠定基础。
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Analysis online showed that its secondary structure was mainly composed helix and extended-beta, and phylogenetic tree revealed that it clustered closely with Sparus aurata and Dicentrarchus labrax.
二级结构分析显示其以螺旋和β折叠为主，系统进化分析表明其与金头鲷和欧洲鲈鱼的亲缘关系最近。
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The main factors leading to difference include staticelectro and steric interaction of DNA helix and the complex probe.
导致这种识别识别差异的主要因素是DNA螺旋结构和金属配合物的形状导致的静电相互作用和空间阻力作用。
- 相关中文对照歌词
- Double Helix
- 推荐网络例句
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In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.
。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。
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Go down on one's knees;kneel down
屈膝跪下。。。下跪祈祷
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Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.
Nusa Dua ：豪华度假村，冲浪和潜水，沙滩，水晶般晶莹剔透的水，网络冲浪。