free space wave 中文意思是什麼
free space wave
解釋
自由空間波-
And this result is extended to the eigenfunction of maxwell ' s equations. then the mode series of step index planar dielectric waveguide and circular optical fiber are studied, including propagation modes and radiation modes. as application, there are three examples : the emergent wave from planar waveguide to free space, the transverse and longitudinal coupling of waveguide and the measurement of scalar gratings
由於從一個空間到另外一個空間的光束傳播伴隨著界面上各個模式能量之間的耦合，作為應用，本文介紹了完備性在三個情況下的應用：平面波導出射光束的衍射性質、波導的橫向和縱向耦合以及標量光柵的測試。 -
Finally a set of equations with initiate values for boundary value problem is established where the velocity potential and its normal derivative are unknowns. because the model includes the effects of both the time and space to the velocity potential of free surface, it can be applied to strong nonlinear wave. as examples, solitary wave is computed in the numerical flume
推導給出計算域內以所有節點波勢函數和波面位置高度的時間增量為未知量的線性方程組，並同時考慮時間因素和空間變位對波面勢函數的影響，在預設的計算精度下，通過時步內的循環迭代逐一確定每個時步上的波面運動位置，從而建立了一種可適于求解強非線性波浪變形計算的數值模式。 -
The effects of the atmospheric turbulence disturbance for free - space laser communication systems are analyzed in the paper, and the correction of low - order modes with adaptive optics system for wave - front error are also discussed
本論文分析和論述了大氣擾動對空間激光通信的影響以及利用自適應光學系統校正低階模式波前誤差理論。 -
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。 -
Pervasive computing ( also known as ubiquitous computing ) is a new wave of computing paradigm. its main ideas include 1 ) the fusion of cyberspace and physical space, 2 ) the distraction - free computing
普適計算（ pervasive / ubiquitouscomputing ）是繼主機計算、桌面計算之後發展起來的一種新的計算模式，其本質特徵是信息空間與物理空間融合和計算對人透明。 -
Chapter 3 : we find a family of solutions of the paraxial wave equation that represents ultrashort pulsed light beams propagation in free space. these pulsed beams have an arbitrary temporal form and a nearly elegant hermite - gaussian cross section, which pulsed beams we call the ultralshort pulsed elegant hermite - gaussian beams
此脈沖光束解的每個頻率分量都是eleganthermite - gaussain光束，時間脈沖的形狀是任意的，具有相同的衍射距離參數，並且可以描述短於一個光學周期的超短脈沖。 -
Recently, some experiments and theoretical researches showed that there were anomalous propagation of electromagnetic wave in free space and waveguide in some case, and those phenomena is in conflict with classical theories
近年來，不斷有實驗和理論研究表明，在無界空間和波導中，在某些情況下，電磁波的傳播出現異常現象，這些現象同經典理論有些沖突。
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