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- double periodic structure 双周期性结构
- The complex resonant frequency and radar cross abation(RCS)are formulated by spectral domainapproach of periodic structure. 运用无限周期结构的诸城法建立起微带阵列天线的复谐振频率和雷达散射截面公式。
- The computation of lyapunov exponent with different parameters shows that there were double periodic, almost periodic and chaotic motion behavior in this system. 通过对系统李雅普诺夫指数的计算，发现了该系统存在倍周期、概周期运动以及混沌运动现象。
- The charge, orbital, or spin ordering of valence electrons in advanced materials can be incommensurate with the periodic structure of lattice. 摘要在前瞻性材料中，价电子的分布可呈现与原子结构不一致的周期性，形成电荷、轨域或自旋有序排列。
- Photonic crystal is a new type periodic structure with frequency bandgaps, their unique bandgap features bring about wide application prospect. 摘要光子晶体是一种具有具有频率禁带的新型周期结构，它独特的频率带隙特性使得光子晶体具有广泛的应用前景。
- The optical characteristics such as transmission and polarization of this periodic structure in different incident tangos and refractivity conditions were analysed. 利用光学传输矩阵法研究了这种结构的光子晶体,分析了在不同入射角和折射率条件下,该周期结构的透射和偏振的光学特性。
- In order to calculate the equivalent step index of the periodic structure of the cladding holey optical fiber, all-vectorial fundamental space filling mode approach was utilized. 为了计算周期结构包层多孔光纤的等效阶跃折射率，采用了全矢量基本空间充填模式法。
- The influence of atomic internal state population on its translational motion in a quantized standing wave cavity field with spatial periodic structure is investigated. 基于原子作双光子共振跃迁的原子场缀饰态,讨论了驻波腔场中两能级原子的量子化平移运动与原子内态布居间的相互影响。
- In a word, the paper has presented theory base and circuit design examples to novel Radar systems and MIC with high performance, small size, low power loss, and novel periodic structure (EBG and DGS). 总之,本文为研究和设计面向下一代雷达系统、具有高性能、小尺寸、低功耗、基于新颖周期结构(EBG结构和DGS结构)的微波集成电路,提供理论基础和电路设计范例。
- Theoretical analysis showed that under well specified conditions, electromagnetic slow wave can interact stationary with moving periodic structure,based on that the a working principle can be proposed for a class of MEMS motor and actuator. 理论分析表明,在特定的条件下,电磁慢波与运动周期结构之间可以发生稳定的相互作用,这能够成为一大类MEMS电机或执行器的一种不同的工作原理。
- Secondly, the dispersion equation of longitudinal wave is derived based on the transmission model that longitudinal waves propagate along the periodic structure such as the drill strings or oil pipe. 其次，建立了理想钻杆和油管这种宏观周期性结构中沿管轴方向传播的纵波传播模型，推导出了纵波的频率方程(色散方程)。
- The capability of periodical structure attenuating incident wave has been proved by simulation results. 3. 3、 在电磁波有源吸收研究方面，提出了结构性吸收的概念。
- Frequency selective surface (FSS) is a two-dimensional periodical structure and used mostly in the filter. 频率选择表面(FSS)是一种具有二维周期性结构的滤波结构,主要在滤波器上使用。
- Frequency-selective surface (FSS) is a two-dimensional periodic structure consisting of a dielectric substrate and the metal units (or apertures) arranged periodically on it. 频率选择表面(FSS)是二维周期结构，由周期性排列的金属单元(或孔径单元)和介质衬底构成。
- He is working double tides to finish his essay. 他日夜苦干，赶写他的文章。
- With appropriate top and bottom periodic hole structures arrangement, the emission peaks from SPs resonance in the bottom periodic structure are observed simultaneously. 在适当的上、下周期性结构设计之下，可观察到由下层周期结构所造成的表面电浆共振产生的发射频谱。
- I do not realize it is a double feature. 我原先不知道这是双片连映。
- Double agents live in a perpetual state of fear. 两面派永远过着提心吊胆的生活。
- I want a double room with a view. 我要一间能看到风景的双人房间。
- He was so fat that he had a double chin. 他胖得有双下巴了。
