periodic boundary condition 中文意思是什麼
periodic boundary condition
解釋
周期邊界條件-
In the first part of the paper, the explicit form of difference equation and periodic boundary condition is derived in cartesian coordinate system. secondly, the dispersive characteristic is analyzed in cylinder coordinate system for many high power microwave devices use cylinder sws. and then the method is extended to calculate the band structure of 2 - d photonic crystal, a modified yee ’ s grid is introduced to calculate the dispersive characteristic in the case of triangular lattice, so that both square lattice and triangular lattice cases can be solved in cartesian coordinate system
周期電磁結構的一個重要應用就是用作高功率微波器件中的慢波系統，考慮到目前大部分高功率微波器件的慢波系統多採用圓柱周期結構，在論文第四章中，在圓柱坐標系下，給出了差分方程和周期性邊界條件的具體形式，同時編寫程序，分析了milosws ，盤荷慢波結構的色散特性。 -
Using field transformation ideas and split - field method to solve the difficulty of setting periodic boundary condition when excitation is abnormally incident, and founding time domain function for analysis of fss
採用場變換思想和場分裂方法，建立相應的時域迭代公式，解決了平面波斜入射情況下周期邊界條件設置中的困難。 -
On the equation ( the equation is abbreviated ) with initial condition and periodic boundary condition a system of ordinary differential equations to time was built by the four - order difference method, then the precise integration method was used to solve the system
摘要對于方程（方程式略）的初始值與周期邊值問題，利用四階差分化為關于時間變量的常微分方程組，然後採用精細時程積分法。 -
In this paper, we analyze difference solutions of the burgers - kdv type equations with the periodic boundary condition by use of functional analysis method. the existence of difference solutions is proved by fixed - point theorem and the priori estimates of the difference solution are obtained using interpolation formula of sobolev space. the convergence and stability are proved
本文應用泛函分析方法對一系列burgers - kdv型方程周期邊值問題的差分解進行了分析，運用各種不動點原理證明了差分解的存在性，應用sobolev空間的離散內插公式得到了差分解及其各階差商的先驗估計，利用得到的先驗估計證明了差分解的收斂性和穩定性。 -
A relaxation surface effect is simulated on the basis of a molecular dynamics using the eam ( embedded atom method ) potential by applying a periodic boundary condition for copper. surface atom ' s potential, stress and position changes are presented
運用分子動力學方法對納米單晶銅在接近絕對零度下的表面效應進行了分析，給出了表面原子位置變化、能量大小、應力的大小。 -
In this thesis, author briefly introduces basic theory of fdtd method at first, and research the method for analysing fss : the finite difference time domain combined with periodic boundary condition ( pbc ) and absorber boundary condition ( abc ) becomes the accurate and efficient tools for analysing frequency selective surfaces
其中時域有限差分法（ fdtd ）是求解麥克斯韋微分方程的直接時域方法。本文從fdtd的基本演算法原理出發，研究了頻率選擇表面的特性分析。其中包括了fdtd方法與周期性邊界條件、吸收邊界條件相結合，形成分析各種周期性結構準確、有效的通用工具。 -
In the third chapter, we can obtain the soil temperature field expression under the different depth and the different time through carrying on the analysis of the temperature field of the symmetry semi - infinite big object under the periodic variation boundary condition
在第3章，通過對勻質的半無限大物體周期性變化邊界條件下的溫度場進行分析可以得出在不同深度、不同時刻下的土壤溫度場的表達式。 -
With the application of the periodic boundary condition ( pbc ), the computing domain can be restricted to a single period, which greatly improve the computing efficiency and accuracy
本文通過採用時域有限差分演算法（ fdtd ） ，利用周期電磁結構中場所滿足的周期性，引入周期邊界條件，將計算空間限制在一個周期內。 -
The accuracies of the different orders symplectic difference schemes are compared and the effect of the spatial discretization methods upon the accuracy is analyzed by simulating the propagation of a one - dimensional wave under the periodic boundary condition
本文用一維波動方程的初邊值問題初步比較了不同階數辛格式的精度，並分析了空間離散格式對精度的影響。 -
Finally, multi - passage method was adopted to deal with the phase - difference periodic boundary condition. when the frequency of separated vortex propagating is not the same as the vibrating frequency of blade, this method is much more reasonable than those simple phase - shifted periodic condition in single passage
最後，採用多葉柵通道計算來處理相差周期邊界條件，在分離渦傳播頻率與振動頻率不同時比其它採用簡單相移條件的方法更為合理。
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