four-level 中文意思是什麼

four-level 解釋
四層的
  • four : n 1 四人小組；（套在車上的）四匹馬。2 四的記號；（骰子的）四點；（鐘點的）四時；四歲。3 〈pl 〉 ...
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  1. In this paper we have done two work, one is we, in the dressed states representation, reveal that the constructive interference of atomic coherence on absorption leads to electromagnetically induced absorption, which is in sharp contrast to the case in which destructive interference of atomic coherence gives rise to electromagnetically induced transparency and the other is we reveal that coupling field linewidth inhibits electromagnetically induced absorption, by employing a four - level system in which three transitions are in n configuration and the middle transition serves as a probe transition

    本文主要做了兩方面的工作：一是在修飾態表象中揭示修飾態原子相干對吸收的相長干涉產生電磁誘導吸收，這與修飾態原子相干對吸收的相消干涉導致電磁誘導透明的情形形成鮮明的對照。二是在裸態中，引入耦合場的線寬，從而發現耦合場的線寬抑制電磁誘導吸收。首先研究電磁誘導吸收。
  2. 4. the feature of linearity and ring structures shows that three structural lenses that are formed by the junction of four level i faults in alignment are helpful to the formation of ore - body. in longshujiao and longtouzhai lenes there are many intersectant east - north and west - north low level faults, so they are concentration place of ore - bodys

    4 、從遙感線環構造特徵上看，區內的四條主要東西向線性構造，是級控巖控礦線性構造，它們在走向上弧形交接形成三個構造透鏡體，是成礦的有利部位。
  3. We analyze the influences of the perturbed energy - level space and superposion, laser power and intermediate level offset on quantum interference. experimentally, in the sodium dimmer rhomb - type four - level system with a pair of perturbed levels, the interference enhancement of two - photon absorption caused by coherent superposition of the perturbed levels is experimentally observed

    分析了微擾能級的間隔和疊加程度、激光功率以及中間能級的失諧對量子干涉效應的影響，實驗上觀察了包含有一對微擾疊加中間能級的菱形四能級系統中的雙光子激發現象，發現微擾能級的相干疊加可增強雙光子吸收。
  4. Abstract : we have studied theoretically a beat effect in a four - level system due to fifth - order optical polarization, and considered the cases that the pump beams have either narrowband or broadband linewidth. we have found that the accuracy for the energy - level splitting measurement is determined by the homogeneous linewidths of the optical transitions. that is to say, this technique can achieve doppler - free precision in the measurement of the energy level splitting between two excited states which are dipolar forbidden from the ground state

    文摘:研究了四能級系統中基於五階極化的拍頻效應，考慮了抽運光束為窄帶線寬或寬帶線寬的情形.發現其對能級分裂的測量精度決定於光學躍遷的均勻增寬.也就是說，這種技術在測量與基態是偶極禁戒躍遷的兩激發態之間的能級分裂時，可得到消除多普勒增寬的精度
  5. Atomic coherence effects in four - level system

    四能級系統中的原子相干效應
  6. The coherence properties of spontaneous radiation in the four - level atom

    四能級原子自發輻射的量子相干特性
  7. Teleportation of an unknown four - level atomic state by epr of a - type three - level atom

    單個未知多能級粒子態的概率隱形傳輸
  8. Entropy evolution of the field interacting with a quasi - - type four - level atom

    二項式光場與二能級原子的相互作用及場熵的演化
  9. Equivalent - circuit model for a four - level - coaxial - circular - cone - like magnetically insulated transmission line

    4層圓盤錐形磁絕緣傳輸線的等效電路模型
  10. Evolution properties of the field entropy in the system of the su coherent states field interacting with a four - level atom

    雙模光場與級聯三能級原子相互作用系統中熵的演化
  11. This four - level - n - configuration atomic system is easily accessible, what ' s more, it has testified in the experiment

    這種n型結構的原子系統很容易實現，而且在實驗上已經得到證實。
  12. Thermodynamic model and performance of an irreversible four - level - temperature absorption refrigeration cycle with finite heat capacities

    有限熱源四溫位不可逆吸收式製冷循環模型及性能分析
  13. Aiming at the drawbacks of variant levels of key hierarchy, this paper describes two four - level schemes of key hierarchy in cas

    該方案不但降低了密鑰分配復雜度，而且實現的系統的動態管理。
  14. Evolution of the field entropy in the interaction of the two - mode su coherent states field with four - level atom added kerr - like medium

    激發相干態光場與級聯型三能級原子相互作用的場熵與場的線性熵演化特性
  15. The focus of the thesis consists in the 5th chapter, in which the author brings forward four conclusions : set up the four - level budget structure : budget management commission, comprehensive budget department, budget chargeable department and budget responsibility center

    本文的創新之處是實踐性、針對性較強，對sr發電公司委託代管和控股經營模式下的預算管理問題進行了改進探討，運用了責任會計理論，將預算管理與資產經營責任制結合起來。
  16. Compared with three - level atomic system, the atomic coherence effects in four - level can lead to eit and eia, which depend on the intensity of control light and the relaxation of the fourth level

    與三能級原子系統相比，四能級原子相干效應即可導致電磁感應透明的產生，也可產生電磁感應吸收現象，取決于控制光的強度和第四個能級衰變率的大小。
  17. According to the situation request, we combine with the fact on the railway for the time being, raised the whole views and suggestions to the railway improvement, the first : to realise railway shareholding entreprises is the basic way of railway improvement winder the public ownership circumstance, the second : it is gotton the whole locatim to the function of ministery of rail ways, railway bureau. the branch of railway bureau and the units of railway department, it is designed the whole developing frame that the funtion of ministry of railways is macro - controler, the railway bureau or its branch is management substance which ouur legal qualifaction the unit of railway department is the basic product unit, the third : it describes kinds of faults on the present four level management, and tolal the data auording to the fact

    根據形勢要求，結合目前鐵路的實際情況，對當今鐵路的改革提出了整體的看法和建議：第一、實現鐵路企業股份制是公有制條件下鐵路改革的根本出路；第二、對鐵道部、鐵路局、鐵路分局、基層站段的功能給予了整體的定位；設計了鐵道部的功能是宏觀調控者，鐵路局或分局為法人代表的經營實體，基礎站段為生產基本單位的整體改革框架；第三、對目前四級管理體制的種種缺陷作了描述，並根據實際情況進行了數據統計。
  18. The atomic coherences in four and three level systems are discussed in this thesis : 1 ) atomic coherence effects in four - level n - type atomic system are discussed

    為此，我們對此做了一系列深入研究，本文的主體內容有二：第一，研究了n型四能級原子系統中的原子相干效應。
  19. Next we consider the effect of the coupling field linewidth to electromagnetically induced absorption, by employing a four - level system in which three transitions are in n configuration and the middle transition serves as a probe transition, we find that coupling field linewidth inhibits electromagnetically induced absorption

    碩士學位論文master 』 st } iesis其次，本文研究在裸態下，考慮禍合場線寬對原子相干的作用，進一步揭示了禍合場線寬抑制電磁誘導吸收。這與禍合場線寬增強eit的吸收形成鮮明的對比。
  20. 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。
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