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But, most of the traditional mushroom structures are restricted to only single EBG frequency design. In this thesis, we propose a novel concept about the interlaced periodic arrayal of the mushroom structure with the suspending microstrip line. By the simulation and measurement result, it is verified that the mushroom structure with the suspending microstrip line can reveal multi-band EBG characteristic.

而传统的蕈状结构的应用，多半只有操作在单一频率的电磁带隙特性，而本论文就针对了蕈状结构结合悬置微带线架构的电磁带隙特性研究，并提出了一种新的穿插周期排列的概念，透过电路模拟与实作量测的验证，我们成功的让蕈状结构结合悬置微带线的架构展现出多频电磁带隙的特性，并且，我们利用了这一个新概念设计了一种新型的微波电路。

A bi-periodic accelerator structure with coupling cavity of arrow-shaped cross-section is described in this paper.

本文对一种使用箭型耦合腔的双周期加速结构进行了研究。

Depreciate or Amortize - An accounting procedure that gradually reduces the book value of an asset through periodic charges to income.

折旧或摊销–一种逐渐减少某固定资产的帐面价值并定期在收入中抵扣的会计程序。

In this thesis, we take the delay r as a bifurcation parameter to investigate the Hopf bifurcation phenomenon in system (1). By analyzing the associated characteristic transcendental equation of system (2), and using the Hopf bifurcation theorem, we obtain one condition for the existence of Hopf bifurcation in system (1). Furthermore, based on the center manifold theorem and the method of normal form, some interesting results about the properties of Hopf bifurcation are obtained, including the direction of Hopf bifurcation and stability of Hopf bifurcating periodic solutions.

我们以时滞T作为分支参数，研究了系统(1)的Hopf分支现象：通过分析系统(2)的特征超越方程，结合利用Hopf分支定理获得了系统(1)的Hopf分支存在的一个条件；利用中心流形定理和正规形方法分析了系统(1)的Hopf分支的性质，包括分支的方向和分支周期解的稳定性。

Assuming that the connect and infectious rate is a periodic function, we study the asymptotic behavior of the solution for this model.

在模型中，假设接触感染率为时间的周期函数，研究模型解的渐近行为，得到了疾病传播的阈值。

In this thesis, we mainly study the multi-scale asymptotic expansion and high accuracy algorithm for the periodic structure of composite materials.

本文主要研究复合材料周期结构的多尺度渐近展开与高精度算法，特别对多孔复合材料的多尺度渐进展开与高精度算法作了比较详细的研究。

The existence and stability of co-exist periodic solutions are investigated by using the bifurcation theory, the implicit function theorem and the method of asymptotic expansion.

运用分歧理论、隐函数定理以及渐近展开的方法，获得了共存周期解的存在性与稳定性的结果。

This paper, considers conservative equation with periodic boundary value problem, and construct a difference scheme, Uses the method of decomposing the singular term from its solution and combining an asymptotic expansion of the equation, proves that the scheme converges uniformly to the solution of differential equation with order one.

研究守恒型奇振动方程的周期边界问题，构造一个差分格式，利用分解解的奇性项的方法，结合问题的渐近展开，证明所构造的差分格式为一阶一致收敛。

This paper presents an asymptotic procedure based on transmission line analogy to determine the radiative characteristic of external calibration loads composed of doubly periodic tapered microwave absorbers.

华中理工大学电子与信息工程系，武汉 430074 本文给出了近似求解二维周期渐变形状吸收体构成的微波辐射计外部定标负载辐射特性的方法。

The present paper presents a general existence result of periodic solutions for functional differential inclusion with nonconvex right side by means of the asymptotic fixed point theorem.

用Horn渐近不动点定理，给出具非凸右端函数的泛函微分包含问题周期解存在性的一般性结果。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。