periodic field 中文意思是什麼
periodic field
解釋
周期場-
Eeg is a kind of complicated non - periodic bioelectricity signal and its research is still an important field for modern science
腦電是極為復雜的非周期生物電信號，對腦電的研究始終是現代科學的一大熱點。 -
The electron state in the periodic electromagnetic field
周期性電磁場中的電子狀態 -
Orders of periodic elements of general linear group over any field
任意域上一般線性群周期元素的階 -
Through changing the interaction time, the degree of entanglement of the atom - cavity field hasa periodic change
隨著時間的演化，原子與光場組成體系的糾纏度呈現出周期性變化規律。 -
It is the main purpose of this paper to calculate the energy splitting of ground state and excited states induced by thermally assisted quantum tunneling. first, a brief introduction is given for the theoretical and experimental studies on the magnetic macroscopic quantum effects. then, spin tunneling in a uniaxial ferromagnetic particle in transverse magnetic field is converted to a pseudoparticle moving in effective double - well potential with the help of the effective potential description of quantum spin systems developed by ulyanov and zaslavskii. finally using the periodic instanton method we evaluate the transition amplitude, energy shift and prefactor of wkb exponential and the energy splitting of ground state and the tunneling rate for excited states induced by thermally assisted quantum tunneling are obtained
文章首先對磁性宏觀量子效應的理論和實驗方面作了簡單介紹，然後藉助于ulyanov和zaslavskii發展的一種等效勢描述方法，把外磁場沿難磁化軸方向時的自旋隧穿約化成在等效雙勢阱中運動的粒子，利用瞬子方法給出基態能級劈裂，最後利用周期瞬子方法分別計算了隧穿幅、能級移動以及wkb前因子，從而給出由於熱助量子隧穿引起的激發態的隧穿率。 -
In chapter 3, the subgrid eddy - viscosity model for large eddy simulation is applied to calculate the three dimensions unsteady periodic turbulent flow in yantan francis turbine. the pulsating characteristics of some main physical parameters in flow field are found. the calculated axial water thrust of hydraulic turbine agrees with the model - test value
第三章採用大渦模擬亞格子渦粘模型，對巖灘混流式水輪機的流場進行三維非定常湍流分析，得到了流場中各物理量的脈動特性，計算出ms的軸向水推力與模型試驗值大小相當；同時論證了對于下機架承重的混流式水輪發電機組可採用其推力軸承負荷作為水電站廠房振動的最大垂直激振荷載。 -
The basis is that when incident polarized light gets through a liquid - crystal box, it ’ s first diffraction angle and optical intensity are controlled by periodic electric field
其原理為:入射偏振光通過空間周期電場作用下的液晶盒，一級衍射角和衍射光強受到電壓的調制。 -
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。 -
And the subroutine is developed to add the periodic condition in the commercial 3d fem software. 3d electromagnetic field analysis is done to analyze the magnetic flux distribution in the tfpm. base on the field analysis, the mathematical model is given
採用簡化的三維電磁場計算方法對橫向磁通永磁電機內部磁通分佈進行了研究，計算了各部分的磁通密度分佈和漏磁通的走向，得到了電機的空載漏磁系數及空載反電動勢以及主要的漏磁通分量。 -
As the 3d electromagnetic field calculation region of the tfpm is not suitable for the periodic condition, the calculation must be done for the whole region. it takes too much time. firstly, a method is adopted to simplify the 3d model with periodic condition
本文的工作主要包括以下幾部分內容:首先對本文研究的橫向磁通電機的三維電磁場分析模型進行了簡化，提出了對不符合周期條件的求解區域在工程設計允許的范圍內進行簡化處理的方法，同時對商業軟體進行了二次開發，編制了周期條件處理程序，減少了三維電磁場計算時間。 -
Furthermore, the principle and nature of periodic instantaneous temperature field disturbance and permeation have been discussed with several cases of various types to examine the speed of heat transfer and permeation and damping of temperature wave
充分討論了周期性瞬態溫度場的擾動、滲透的機理和實質，以幾種不同的實例考察了熱傳播的速度以及溫度波的滲透和衰減情況。 -
The result shows the periodic characteristics of microjet flow field including vortex pair evolution, immigration and dissipation process
模擬結果顯示了微射流的產生、形成、發展與耗散過程以及微射流的卷吸特徵等。 -
Based on the previous theory, the fdtd method is used to analyze practical antennas, which include dipole antenna, microstrip antenna, log - periodic antenna and broadband resistance loaded monopoles. the particular problems that occur in the calculating of vary type antennas are discussed. the cross - section field of microstrip line and two - conductor line are analyzed, and the effect on the numerical result arising from the incident cross - section mesh size is discussed
在前面理論的基礎上，將fdtd用於振子天線、微帶天線、對數周期天線、電阻加載振子天線等各種天線的計算中，對各種不同類型天線計算中所遇到的特殊問題進行了詳細的討論，並分析各種開放場傳輸線如微帶線、平行雙線等橫向場分佈，討論了入射網格橫向截斷區域的大小對計算結果的影響。 -
Artificial periodic disturbances are introduced to the outer field of turbulent boundary layer in an closed - circuit open water channel. statistical method is employed for analyzing the velocity - fluctuation - time - series. the effect of the disturbance to turbulent structure in boundary layer is studied
在開口式循環水槽底部湍流邊界層外區中引入周期性擾動，對湍流場的速度脈動時間序列信號進行了統計分析，研究了湍流邊界層中周期性人工擾動對湍流結構的影響，結果表明高頻擾動的湍流中she - leveque簡稱sl湍流層次相似律成立。 -
According to faraday law on electromagnetic induction and the difference of the magnetic energy of ferromagnetic materials in their magnetization and demagnetization, it is clarified that the swing, vibration and periodic translational reciprocation of any object made of ferromagnetic material in geomagnetic field must cause spontaneous magnetization of the object itself
摘要依據法拉第電磁感應定律和鐵磁性物質在磁化一退磁過程中的能量差異，闡明了鐵磁性物體在地磁場中的擺動、振動和周期性往復平動都會引起該物體的自發磁化。 -
Periodic visual field and three dimensional disc examination are important for high myopic patients
定期視野及三度空間視神經的檢查在高度近視病患是重要的。 -
Introduced a new way for dispersion compensation in transmission using uniform fiber bragg gratings. at the last, the analysis of fiber grating production with a phase mask was carried out. based on diffraction and interference theories, we access the near - field optical intensity distributions produced by a periodic mask and draw the important conclusion that we must put the mask near the fiber as we can in the experiment
最後論文討論了光纖光柵的製作，分析了掩膜板后干涉光場的分佈，指出了掩膜板製作應該盡量實現零級抑制，且在系統調試中，光纖要盡量靠近掩膜板放置這一重要結論，在此基礎上利用現有實驗設備製作出了光纖光柵，研究了不同曝光條件對光柵製作的影響，並利用實驗分析了光柵的溫度穩定性。 -
At the same time, deadline field is introduced into periodic data frames to differentiate their emergency degree, and non - preemptive edf scheduling method is applied to improve the end - to - end delay of periodic data field
同時還在周期性數據幀中引入截止期限欄位來區分其不同的緊急程度，並對其採用非中斷的edf調度方法來改善周期性數據幀的端到端延遲。 -
The material ways are to model the honeycomb wall as an impredence surface, to express the infinite honeycomb by using periodic green ' s function, and using method of moment to establish the mathematic model, in applying the methods of moments, we choose the roof function as basic function and choose the razor function as test function ; by equating the incident field to sum of the scattering field and impledance field ; we will set up the integral equation for the surface current, solving it by mom equation. then gain it ' s reflected coefficient ' s numerical result. and we propose first the definition of the equivalent electromagnetic parameters and present a method to calculate them from the gained reflection coefficient
具體方法就是將浸漬吸收劑的蜂窩壁用表面阻抗表示，將無限大的周期結構的電場用周期格林函數來表示，選取有耗蜂窩結構中具有代表性的基本計算單元應用矩量法建立數學模型，在運用矩量法時用屋頂函數作為基函數，刀片函數作為檢驗函數，根據蜂窩壁表面電場必須滿足入射電場等於散射電場和阻抗電場之和的規律，推導表面電場積分方程，求解蜂窩結構的表面電流，利用蜂窩的周期規律得到無限大均勻周期陣列的散射電場。 -
Axially periodic field
軸向周期場
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