相干傳播 的英文怎麼說

中文拼音 [xiānggānzhuànbō]
相干傳播 英文
coherent propagation
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 干 : 干Ⅰ名詞1 （事物的主體或 重要部分） trunk; main part 2 （幹部的簡稱） short for cadre Ⅱ動詞1 （做...
  • 傳 : 傳名詞1 （解釋經文的著作） commentaries on classics 2 （傳記） biography 3 （敘述歷史故事的作品）...
  • 播 : 播名詞（姓氏） a surname
  • 相干 : 1 （多用於否定句或疑問句） have to do with; be concerned with 2 [物理學] coherent; 相干散射 coher...
  • 傳播 : 1 （廣泛散布） disseminate; propagate; spread; （over）; diffuse; transmit; run 2 [物理學] propag...
  1. The equations of motion governing the axisymmetric elastic deformation of finite orthotropic cylindrical shells, involving the effect of transverse shear and rotational inertia, are derived. by applying the reverberation method, the displacement and the resultant forces of the shell in the phase space are expressed. then the transient waves in the finite orthotropic cylindrical shell subjected to the axisymmetric impact are obtained by using inverse laplace transforms. furthermore, the transient solutions are decomposed to the generalized ray integrals and computed numerically

    分析了計及剪切變形和轉動慣性的有限長正交異性圓柱殼中彈性瞬態波的傳播問題，採用回傳矩陣法，在相空間中給出了位移和內力的表達式。再利用laplace逆變換，得到正交異性圓柱殼受軸對稱沖擊作用時彈性瞬態波解，然後將其分解為若干廣義射線積分之和，並用數值方法求解之。
  2. Secondly, in phase unwrapping to overcome the spread of wrong point, changing the patch of unwrapping phase is done to improve the correctness of it. then, the relation between the unwrapping phase and the height of reconstructed object is discussed detailedly. the data processing, algorithm analysis and reconstructing object are done for the collecting fringe image which are all based on matlab language, in all these achievements, the improvement and innovation aspect are following : a ) in order to stabilize the interference fringe, a new equivalent shifting object method is presented by using fringe stabilizing device to stabilize the interference fringe though moving object and ccd camera which fixed on a precise moving platform together, the experimental result shows the fringe drift is less than a / 20 in five minutes, and the equivalent phase shifting precision is x / 100

    論文在全面闡述了光學三維輪廓位相測量術的發展、應用現狀、研究熱點及未來發展趨勢的基礎上，簡要介紹了傅立葉變換和相移位相輪廓測量術的基本原理，對兩種測量方法存在的問題及誤差進行詳細分析和比較；針對位相解包裹錯誤點的傳播問題，作者通過改變解包裹路徑來提高位相解包裹的正確性；分析討論從解包裹位相（ x ， y ）到再現物體的高度h （ x ， y ）物理量之間的關系，研究相應的演算法，利用matlab平臺，對實際採集的條紋圖像進行處理和輪廓重構，其中改進及創新工作主要表現在以下兩個方面： （ a ）針對干涉型結構光場干涉條紋出現的漂移抖動對相移的影響，提出了一種用條紋穩定器穩定干涉條紋，用精密移動平臺使物體和ccd攝像頭同步移動實現等效相移的方法，建立了相應的測量系統，系統的條紋穩定可以達到。
  3. In chapter 4, a simulation approach is presented, which combines the outdoor radio propagation model, the eigen - driven patterns of handset diversity antenna with two feed ports and combining schemes of receiving signals, to investigate the performance of a dual antenna handset under co - channel interference ( cci ) and multi - path fading environment

    第四章首先用本徵激勵方向圖的概念來產生手機雙埠分集天線的接收信號矢量，然後將其與城市室外電波傳播模型、分集合併方式相結合，建立了分析在具有共道干擾和多徑衰落環境中手機雙天線系統的性能模型。
  4. Two spherical waves and multiple spherical waves interference, and yang ' s interference experiments are simulated by using different methods. two spherical waves interference is focused on the on - plane or out - plane of the spot light source plane and the observing plane. then, we analyze how the temporal coherence of optical waves influence the contrast of the interference pattern

    用光波波前疊加的方法實現了對兩列球面波干涉、多光束干涉等實驗的模擬；用傳播矩陣描述衍射光波波前傳播的方法對楊氏雙縫和雙孔干涉實驗進行了模擬，並具體詳細地分析了單縫衍射對雙縫干涉的影響；另外還分析了光場的時間相干性對干涉條紋反襯度的影響。
  5. Theoretically, using the theory of mutual effect between laser and plasma, the rule of laser propagating in plasma, and the principle of differential interferometry, the basic model of differential interferometry for plasma density measurement was built

    理論上，運用激光與等離子體的相互作用原理、激光在等離子體中的傳播規律、以及差分剪切干涉測量技術原理，建立了使用差分干涉技術測量稠密等離子體密度的基本模型。
  6. It is found that the fwm field can cause the asymmetry of electromagnetically induce transparency profile. in addition, the effect of different propagating orientations of probe field on the electromagnetically induced transparency is also discussed. in the molecular multi - level system with the perturbed superposition levels, we discuss the electromagnetically induced transparency, spontaneous emission enhancement, double dark resonance and double electromagnetically induced transparency by using the density matrix equation under weisskopf - winger approximation and dressed - state density matrix equation

    針對實際的實驗條件，考慮了一種影響量子干涉的新的因素-四波混頻場，研究了四波混頻場對雙光子探測的-型能級體系的eit的影響，發現四波混頻場能夠導致雙光子探測的eit線型的不對稱，在此基礎上，討論了不同探測場的傳播方式對eit的影響，針對分子中實際存在的包含有微擾能級的不同多能級系統，我們分別採用綴飾態繪景下的密度矩陣方程和weisskopf - wigner近似下的密度矩陣方程詳細地討論了電磁感應透明、自發輻射的干涉相消和相長、雙暗態共振和雙電磁感應透明現象。
  7. Finally, we present the approximate distribution of trapping potential of the guided cold atoms in the atomic funnel based on the vccc or the uccc. by using a similar method in the analysis of optical coherence, we study the coherent evolution of the ground - state wave function of ultra - cold atoms in atomic funnel, and obtain some normalized correlation functions of the first, second, third and high order

    最後，給出了原子在基於v -型和u -型載流導體構建的原子漏斗中所感受到的囚禁勢的摘要採用漂流導體的原子易引及其原於光學器件近似分分，並採用類似於光場相干性的分析方法，計算了超冷原子物質波的基進波函數及其在原子漏斗中傳播時相干性的演化，得到了物質波的一階、二階、三階和高階相於度。
  8. The research interests in this team are nonlinear optics at low light intensities, including photorefractive nonlinear optics ( photorefractive materials, effects and their applications ), optical storage materials, nonvolatile optical recording technology and mechanics with high recording rates, high data density and high data transfer rates, nonlinear dispersive system and the dynamic propagation properties of photons in such dispersive system, and nonlinear optical properties of phasonian systems such as electromegnetically induced transperancy

    本實驗室目前從事弱光光學非線性方面的研究：主要包括光折變非線性材料、效應以及應用；超快超高密度光存儲材料、非揮發存儲技術及其機理；非線性色散系統以及光子在非線性色散系統中的傳播動力學；量子相干系綜中的非線性光學性質如電磁感應透明等幾個方面的研究。
  9. Because of radio wave propagating along the ducts with enhanced fields on the order of the free - space field, the problems of the co - channel interference are more complicate for communication systems with the results of intersystem interference and the formation of other system, and therefore affecting the determination of the coordination distances or the optimization of the distribution and separation of delay, and for surveillance system such as radar system the problems can be radar holes or the extensions of detect range

    對于通信電路，它使系統間的相互干擾問題變得復雜，既可能幹擾其他系統又可能形成另外的系統，從而影響系統的有關參數如中繼電路的最佳組合（分佈、間隔）和協調距離，對于探測系統產生的則是雷達空洞、超視距探測等問題。這些問題對相關無線電系統特別是軍事應用系統可能是致命的，因而以波導傳播為代表的反常傳播特性研究受到極大重視。
  10. Pertinent nasal problems include allergies to air - borne particles such as animal dander, and dryness of the nose because of a wood - burning stove

    與鼻子相關的因素包括：對空氣傳播的微粒過敏，如動物的皮屑，還有因使用燒木炭的壁爐而使得鼻腔過干。
  11. The muf and the possible maximum skywave field strength are calculated and are compared with the corresponding groundwave. and the conclusion is that the main propagation mode 200 kilometers on the sea is groundwave and the disturbance of skywave could be omitted

    得出天波傳播的最高可用頻率、可能的最強天波場強，並與相應的地波場強進行了比較，闡明了海上200公里距離上的短波通信中電波主要是以地波的形式傳播的，天波對地波通信的多徑干擾問題可以忽略的結論。
  12. Pulsar radio emission is markedly different from other astrophysical radio sources, characterised by extremely high brightness temperature and high degree of linear or circular polarization. the high brightness temperature of the pulsar radio emission implies that the underlying emission mechanism must be coherent. so far there is no widely accepted model for the radio emission. this paper discusses recent developments in studies of the production and propagation of pulsar radio emission

    脈沖星的射電輻射與其他天體物理輻射源有很大的不同，因為它們有著極高的亮溫度和高度的線或圓偏振.極高的亮溫度意味著起作用的發射機制一定是相干的.至今尚無對這種輻射普遍接受的模型.本文討論了關于脈沖星的射電輻射產生和傳播研究中的新進展
  13. Active underwater acoustic positioning / tracking systems locate target by measuring the range from object to receiving sensors. usually the target - receiver range can be got by the propagating time of a signal pulse. if this propagating time is larger than the pulse repetition period, it will mean that more than one signal pulse are on propagation

    主動水聲跟蹤定位系統通過測量脈沖信號的傳播時延可以測得目標相對接收機的距離，當此傳播時延大於系統同步周期時，時延測量就會呈現不確定性，可能相差若干個重復周期，導致定位解多值，稱之距離模糊現象。
  14. Then the important reference are provided for the optimal system design and technical parameters selecting of long - range underwater acoustic information transmission system. 2. the underwater acoustic channel model based on ray theory is studied, and in combination with the system function of coherent multi - path channel, the method for underwater acoustic channel response prediction through eigenrays finding is obtained

    研究了基於聲線理論的水聲通道聲場模型，分析並模擬了在多種不同聲速條件下的聲線傳播以及不同海底狀況下的聲傳播；結合相干多途通道的系統函數，通過求取本徵聲線進行了水聲通道響應的預測。
  15. Future wireless communication systems trend to provide multi - services to mobile users. cdma technique is adopted by the 3rd generation mobile communication systems due to its flexibility in supporting multi - services. how to keep qos of heterogeneous services and utilize the scarce radio spectrum resources is challenging for 3rd generation mobile communication systems in this thesis we developed a radio resource allocation framework for wireless code division access ( cdma ) networks that support multi - class traffic with different data rates and bit error rate requirements. we proposed a new resource allocation scheme using joint adaptive power control and mmse multiuser receiver in multipath fading system

    為移動用戶提供多種業務服務是未來無線通信網路的主要發展方向。由於cdma技術具有靈活支持多種業務的優點，因而被第三代移動通信系統所采納。如何在惡劣的無線傳播環境里以及用戶運動且相互干擾的情況下為為各類業務提供qos保證，同時充分利用珍貴的無線頻譜資源，是基於cdma技術的第三代蜂窩通信系統必須致力解決的問題。
  16. The topic we have tackled are as the following, ( 1 ) numerical simulation for light propagation and visualization of light - field distribution of fresnal diffraction and fraunhofer diffraction with ( 2 ) computation and display of hologram by method of simulation - anneal ( 3 ) hologram computation of a point source based on method of interference hologram computation

    論文中具體完成了以下工作： 1 、對光的傳播特性進行了數值模擬，以可視化方式表現了菲涅耳衍射和夫瑯禾費衍射的光場分佈。 2 、用模擬退火演算法實現了全息圖的計算及顯示。 3 、在基於干涉全息圖的計算方法上，計算了一個點光源的干涉全息圖和相位分佈。
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