查询词典 helix

Helix, antihelix, helix rim, tragus, antitragus.

耳轮，耳珠，耳屏

The rules of the cold-test characteristics changing with helix pitch are also studied and it turns out that, with increasing helix pitch, the phase velocity increases linearly, the interaction impedance changes nonlinearly and the attenuation constant decreases nonlinearly. At the same time, with the limitation of the synchronism between the electron beam and the electromagnetic wave, the change of pitch is small and therefore an approximate linear relation can be introduced.

研究表明：相速几乎随螺距增大而线性变大，互作用阻抗与螺距是非线性的关系，衰减常数随螺距增大而非线性地减小；由于在维持电子注与电磁波速度同步的限制下，螺距变化的幅度不可能很大，因此可近似按线性关系来处理互作用阻抗及衰减常数与螺距之间的关系。

Helix and angles turns out alternately in Sheep C3d second structure, which helix accounted for 55.12%, strand to 2.31%and coil for the 42.57% of such a structure conducive to the performance of barrel-shaped structure is formed.

绵羊C3d二级结构中螺旋和转角交替出现，其中α-螺旋占55.12%、β-折叠为2.31%，转角区域为42.57%，这样的结构有利于其桶状结构的形成。

with the development of satellite navigation communication,antenna is a very important unit,performance of the satellite navigation communication system is affected by it partly.a new type of bifilar helix for satellite navigation communication system is introduced,and the traving-wave bifilar helix is analyzed briefly.meanwhile,the design and the test results are given.the results show that the antenna possesses excellent circular hemispherical beam with wide angle circular polarization and better impedance match,and has a compact structure and high integration.it can be applied in caps systems successful.

小 摘要：随着卫星导航通信技术的迅速发展，天线作为卫星导航通信系统中的重要部分，在一定程度上决定着卫星导航通信系统的性能。介绍一种用于卫星导航通信系统的双臂螺旋天线，讲述爬行波式螺旋天线的设计过程，并给出最终测试结果。结果表明，该天线具有优良的圆对称半球波束，良好的广角圆极化特性和优良的阻抗匹配特性，其结构简单、紧凑，为通信入站回传提供了一种优良的选择。

According to the theory of antenna and electromagnetic, I simulated the helix antenna which is common antenna on the satellite, and I acquire the preferable result and made different circular polarization helix antenna.

根据天线和电磁场理论，笔者通过仿真星载天线中最常见的螺旋天线，得到较好的效果后，制作不同圆极化方向的螺旋天线。

The experiment results are provided to show that the correspondence quality of the circular polarization helix antennal is good and it meets the design requirements.helix antenna; finite - element method ; radiation pattern; antenna gain

他是2O世纪5O年代首先在连续体力学领域——飞机结构静、动态特性分析中应用的一种收稿日期：2006～12一O7 基金项目：广西自然科学基金(0447090)有效的数值分析方法，随后很快广泛应用于求解热传导、电磁场、流体力学等连续性问题。

This article consists of:(1) a brief review of the previous work concerning this subject,(2) the various methods of studying the arrangement of fibers in yarns, and (3)two basic forms of fiber arrangement——approximate cylindrical helix and approximat conical helix——in ordinary cotton yarns, spun by the roller-drafting system The reasons of formation of such arrangement and their influence on yarn strength are also analyzed.

本文分三部分，第一部分引述了国外以往对细纱中纤维排列形态的研究结果，从而引出本文研究目的；第二部分主要介绍了研究棉纱中纤维排列形态的方法；第三部分根据所采用之方法得出试验结果，表明在一般棉纱中纤维排列成近似圆柱形螺旋线与近似圆锥形的复什的螺旋线二种基本形态。

According to the geometrical principle of conical milling cutter with equal helix angle, a new process of rough machining of conical milling cutter with equal helix angle on universal milling machine by using additive equipment is presented.

根据等螺旋锥铣刀几何原理，提出一种借助附加装置在万能铣床上进行等螺旋角锥铣刀粗加工工艺，介绍了该方法加工锥铣刀时工作铣刀的运动方程；给出了附加装置的设计原理，通过对用此方法加工出的铣刀参数进行测试，证明了这种方法的可行性和实用性。

The horizontal universal milling machine technological transformation based on Mitsubishi PLC;2. Analysis of some important points for makinghelical gear on universal milling machine ;3. According to the geometrical principle of conical milling cutter with equal helix angle, a new process of rough machining of conical milling cutter with equal helix angle on universal milling machine by using additive equipment is presented.

根据等螺旋锥铣刀几何原理，提出一种借助附加装置在万能铣床上进行等螺旋角锥铣刀粗加工工艺，介绍了该方法加工锥铣刀时工作铣刀的运动方程；给出了附加装置的设计原理，通过对用此方法加工出的铣刀参数进行测试，证明了这种方法的可行性和实用性。

Generally, B in the configuration closest cell's DNA conformation, it and the double helix model are similar. A-DNA and when RNA member double helix area as well as duplication forms the DNA-RNA hybrid molecule conformation is close. Z-DNA take the nucleotide dimer as the unit left-hand winding, its principal chain assumes the denticle the shape, therefore.

一般认为，B构型最接近细胞中的DNA构象，它与双螺旋模型非常相似。A－DNA与RNA分子中的双螺旋区以及转录时形成的DNA－RNA杂交分子构象接近。Z－DNA以核苷酸二聚体为单元左向缠绕，其主链呈锯齿形，故名。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。