dipole dipole system 中文意思是什麼
dipole dipole system
解釋
偶極-偶極體系-
The results show : ( 1 ) that the dynamical properties in the system depend on the degree of entanglement of the initial two identical two - level entangled atoms and the intensity of the coherent optical field, and the atomic dipole moment can be completely squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field ; ( 2 ) that the quantum properties of the system also depend on the degree of entanglement of the initial two identical two - level entangled atoms and the intensity of the coherent optical field, and the radiation field can be effectively squeezed via choosing optimal degree of entanglement of the initial atoms in the fee blish optical field
（ 2 ）相干態光場的強度和兩原子的初始糾纏度對光場的量子特性也有很大的影響。光場的二階相干性質（聚束與反聚束）和光場的壓縮效應均與光場強度和兩原子糾纏度相關聯。在弱光場中，選擇合適的兩原子初始糾纏度，光場壓縮深度和時間可達到最大。 -
Firstly, in spherical coordinate system, the sovp formulation for the time - harmonic electromagnetic fields of the current dipole in conductive infinite - space is derived, using reciprocity theorem and transforming relations between special functions. then, selecting appropriate coordinate system, using superposition principle, the boundary - value problem of modified magnetic vector potential on the problem of a time - harmonic current dipole in spherical conductor is solved and analytical solution is obtained. finally, by means of the addition formulas of legendre polynomial and spherical harmonics function of degree n and order 1, the analytical solution in spherical coordinate system specially located is transformed into that in spherical coordinate system arbitrarily located
首先利用特殊函數間的轉化關系和互易定理推導得到了無限大導體空間中球坐標下時諧電流元電磁場的二階矢量位形式：然後利用疊加原理，選擇合適坐標系，求解了導體球中時諧電流元的修正磁矢量位邊值問題，得到了問題的解析解；最後依據不同坐標系下電磁場解的轉化原理，藉助勒讓德多項式和n次1階球諧函數的加法公式，將坐標系特殊安放時的電磁場解析解變換到坐標系一般安放時的解析解，給出了球內電場和球外磁場的並矢格林函數。 -
Quantum interference occurs in a three - level a system with near - degenerate dipole allowed transitions, which are coupled to the same linearly polarized incoherent field
如，當a型的兩個躍遷與一個線性極化的非相干場進行耦合時，非相干泵浦產生量子干涉。 -
The significant feature of the system model is that the two - dipole moment is in the v configuration. of the two dipole allowed transitions, one is very strong while the other is very weak
系統模型的特徵是，三能級系統中電偶極躍遷構成v型結構，其中一個躍遷很強，另一個躍遷很弱。 -
Analyze the linear dipole array with uniform element spacing using the method of moments ( mom ), derive the analytical expression for the recovered signal with the direct data domain method, demonstrate the effect of the mutual coupling on the performance of the antenna array by examples, the degradation of the system caused by the mutual coupling is simulated and analyzed in two different electromagnetic environments such as the weak and strong interference
用矩量法計算了幾個信號同時照射時對稱陣子均勻直線陣的電流分佈，用直接數據域演算法推導了此接收陣列的恢復期望信號的表達式，舉例說明了互耦對陣列天線性能的影響，數值模擬了在弱干擾和強干擾下，互耦造成系統性能下降的情況並分析了原因。 -
Therefore it is considered that the spontaneous emission of atom is caused by the fluctuation of dipole moment, not by the dipole moment oscillation of the atomic system
原子偶極矩的期待值總是零，但偶極矩的起伏恆等於一個不為零的常數，因此，原子的自發輻射是由偶極矩的漲落引起的，並非原子偶極矩振蕩造成的結果。 -
In this application, the lorentz force generated by the interaction between the current in the wire and the geomagnetic field produces an electro - dynamic drag leading to a fast orbital decay. in this paper, we make an intensive study of the process of de - orbiting using electro - dynamic tether system. the concrete work includes : firstly, i have studied the basic principle of how to generate the electro - dynamic drag, modeled via accuracy geomagnetism, made a concrete analysis of the de - orbiting duration, the magnitude and direction of electro - dynamic drag under the action of the dipole and accurate geomagnetic models, set up a counterbalance between electro - dynamic torque and gravity gradient torque, emulate the de - orbiting process of spacecraft, and compared the change of six orbital factors and the de - orbiting duration under the action of the dipole and accurate geomagnetic models
本文對基於電動力纜繩的航天器離軌過程進行了深入研究，具體工作如下:首先，本文研究了電動力纜繩產生電動力拉力的基本原理，建立了精確地磁場模型;分別在偶極子模型和精確地磁場模型作用下，對電動力拉力的大小、方向、離軌時間及電動力纜繩傾角的大小進行了計算分析;建立了電動力力矩與纜繩系統重力梯度力矩的平衡關系;分析了電動力力矩為系統提供能量的原理;最後分別在偶極子地磁場模型和精確地磁場模型作用下，對受電動力纜繩作用的航天器的離軌過程進行模擬，分析了在不同精度地磁場模型下，航天器離軌過程中各軌道參數的變化情況，並比較了不同模型對離軌時間的影響。 -
First, we study electromagnetically induced absorption. this significant feature of the system model is that a four - level system in which three - dipole transitions are in n configuration in this system, the middle transition serves as a probe transition and two other transitions serve as couple transitions
系統的模型特徵是：三個電偶極躍遷構成n型鏈的四能級系統，其中，中間躍遷為探測躍遷，兩邊的躍遷為耦合躍遷。 -
Finally, by means of time evolution operator and numerical calculations, the time evolution of the atomic population, the atomic dipole squeezing, the time evolution of the squeezing and coherence properties of the light in the system of the two identical two - level entangled atoms interacting with the coherent optical field have been studied
論文的第三部分工作是採用時間演化算符和數值計算方法，研究了兩全同二能級糾纏原子與相干態光場相互作用過程中，原子布居、原子偶極壓縮、光場的二階相干和光場壓縮性質的時間演化特性。 -
According to the dipole transition selection rule, it allows the system to transit from the ground state to the first and second sub - band respectively, the shape of the photoionization cross - section varying with the photon energy in the two cases is quite different
根據偶極躍遷的選擇定則，將使得體系從基態分別躍遷到電子的第一子帶和第二子帶，二者的光電離截面隨光子能量的變化截然不同。 -
Abstract : the atomic quantum behaviors in the system of two - mode squeezed vacuum field interacting with a two - level atom via two - photon process are studied by means of quantum theory. the condition for the occurrence of coherent trapping and the influence of the squeezing parameters on the atomic dipole squeezing are discussed
文摘:運用全量子理論研究了雙模壓縮真空場與二能級原子雙光子作用過程中原子的量子行為，論證了原子發生相干俘獲的條件，討論了壓縮參數對原子偶極壓縮的影響 -
Full digital computerized three - dimensional precise position syetem : it is the wold most advanced 128 guide fulldigital computerized three - dimensional precise position syetem which could monitor epilepsy patient pre - operation, in the operation and after operation. it consists of a 128 guide double - video synchronized electro - encephalographic long - distance monitoring system, a dipole three dimensional imagine position and analysis, a spine peak wave automatic recognized system, eeg and ct mri. these system are full of worldly advanced techniques, precisely providing the preliminary three - dimensional coordinate position of epilepsy inducing foci for surgery and gamma knife therapy
是世界最先進的128導全數字化癲癇術前術中術后診療評估系統，由128導雙視頻腦電同步長程監測系統偶極子三維圖像定位分析系統棘尖波自動識別系統eeg與ct mri圖像融合系統等組成，擁有多項世界領先技術，為外科手術和伽瑪刀治療癲癇提供了精確的「致癇灶」原發三維坐標位置。 -
3. by investigating the two - atom dipole amplitude - squared squeezing and two - mode second - power : h - squeezing in a system of a two - mode vacuum field interacting with two coupled atoms, the influences of the initial atomic coherence and dipole - dipole interaction on the two types of squeezing have been discussed. the relation between the two types of squeezing has also been revealed
中文摘要3 .研究了雙模真空場與兩個禍合二能級原子相互作用系統的雙原子偶極振幅平方壓縮和雙模光場二次方h壓縮，探討了原子的初始相干性及原子間偶極相互作用對這兩種壓縮的影響，並揭示了原子偶極振幅平方壓縮和雙模光場的二次方h壓縮的聯系。
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