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- This system can describe infinite kinds of nonclassical periodic structures,especially for those with locally n-fold rotational symmetries forbidden by the rules of the classical crystallography. 该体系能描述无穷多类非经典周期结构，特别是一些经典晶体群规则所不允许的具有局部5，8，10或12次旋转对称的周期结构。
- Materials with negative refractive index attracted lots of interest recently because they can be realized with metamaterials or photonic crystals (PCs), which are usually periodic structures. 拥有负折射率的材料在最近是相当热门的，将人造复合材料或介电材料作周期性排列后，发现可产生负折射的现象，称此结构为超常材料或光子晶体。
- The investment function of insurance (mainly life insurance) and the static and dynamic period structures of financial assets possessing continuate cash flows have been researched. 对保险(以寿险为主)的投资功能和具有持续现金流的金融资产进行了静态和动态周期结构研究。
- 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。
- 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 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。
- That period was a bright page in the history of Chinese literature. 那个时期是中国文学史上光辉的一页。
- Let us hope that the period of this injustice will be over soon. 让我们希望这个不公正的时期很快结束吧。
- Childhood is a period of rapid growth. 幼年是生长迅速的时期。
- 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。
- He consulted the chronicles of the period. 他参考了这一时期的编年史。
- 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。
- 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)。
- Active Control Wave Propagation in Simple Periodic Structures 简单周期结构波传播主动控制研究
