propagation loss 中文意思是什麼
propagation loss
解釋
傳播損耗, 傳輸損耗- propagation : 持續培養
- loss : n. 1. 喪失；丟失，遺失。2. 減損，損失，虧損（額）；損耗；減少，下降。3. 失敗；輸掉。4. 錯過；浪費。5. 損毀；【軍事】傷亡；〈pl. 〉 傷亡及被俘人數。
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On the base, we designed the waveguides " structure and fabrication parameter. and in the design of symmetric y - branch of proton - exchange s ingle - y phase linbo3 modulaor, we used finite difference beam propagation method to analyze and compare the optical transmission loss of different s - bend y - branch
本文對質子交換linbo _ 3單y相位調制器的重要部件y分支進行了深入的研究，比較了不同s彎曲形式的y分支過渡長度與損耗的關系，並計算出間距250 m時的最小彎曲長度。 -
For coupling loss, the method to reduce this loss is pointed out without changing other structural parameters decided by the above requirements. y - branch loss is analyzed by bpm ( beam propagation method )
對于耦合損耗，指出了在不改變前面結構參數（因為它們的設計是根據半波電壓和單模要求設定的）情況下，實現小耦合損耗的方法。 -
Using the beam propagation method ( bpm ) simulation, we confirm that wide controllability of the branching ratio and low excess loss can be realized by this structure
用bpm方法模擬的結果表明，此結構實現了50 - 94的不對稱分支比，並且具有低的附加損耗的特點。 -
In order to utilize the frquency resource adequately and increase the capacity of mobile communication system, the wireless electric wave propagation of existing mobile system always adopts the microcell structure. forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network, at the same time it is a precondition for the research on the microcell mobile system. the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond, that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method, that is establish the deterministic model based on theoretical analyse. the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth, and introduce the common path loss transmition model in land mobile communication system, also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網路規劃、設計提供了必要條件，同時也是研究微蜂窩移動通信系統性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據實驗、統計所得數據建立經驗性傳播預測模型；另一種是用射線跟蹤方法，即依據理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Accordingly ray tracing model for microcells propagation prediction has become an important subject. this paper discussed the characteristic of propagation in symmetrical atmosphere on the earth, and introduced several kinds of traditional path loss propagation model in land mobile communication system, also pointed out the localization of these models based on experiential methods
本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Modeling of propagation path loss in a canopy
樹冠中電波傳播路徑損耗的研究及模型的建立 -
The paper demonstrates the whole plan of the propagation model application software. with the delphi software, an application software including the function of the realtime calculating path loss value is compiled completely. the paper analyses the planning theory of the td - scdma network. its main aspects include the backbone of the network, the link budget report, the budget of the effective distance, the analyse of the link interference and the analyse of the system capacity
論證了td - scdma傳播模型應用軟體整體方案，利用delphi軟體編寫了具有校正功能和實時計算傳播衰耗值功能（與gps系統配合）的應用軟體。論文從理論的角度分析了td - scdma網路的規劃理論，主要從網路拓撲結構、上下行鏈路功率平衡預算報告、有效通信距離的估算、上下形鏈路干擾的分析和系統最大容量分析五個方面進行了論述。 -
These solutions are basically focused on reducing low - si substrate conduction and loss, resulting in an elimination of wave propagation in the substrate, and ther efore improving the performance of the passive elements. they are accompanied by drawbacks
以上方法基本是集中在改善低阻硅襯底的傳導和降低損耗，來改善射頻微波無源器件的性能，但這些方法均存在許多不同程度的缺陷。 -
From the analytical point of view, with the aid of the numerical simulation, we investigate the propagation properties of optical pulses for the nonlinear schrodinger equation in picosecond regime, the higher - order nonlinear schrodinger equation in femtosecond regime, the nonlinear schrodinger equation with varying gain / loss and frequency chirping in homogeneous optical fibers, and ginzberg - landau equation that describes ultrashort pulses in the presence of self - frequency shift, respectively
本文從解析的角度出發，同時藉助各種微擾理論和數值分析方法，分別研究描述皮秒光脈沖傳輸的非線性薛定諤方程、飛秒光脈沖傳輸的高階非線性薛定諤方程、非均勻光纖中光脈沖傳輸的含有頻率啁啾和增益損耗項的非線性薛定諤方程以及描述超短光脈沖傳輸的ginzberg - landau方程的解的特性，為進一步實現超高速、大容量的光信息傳輸提供一定的理論依據。 -
Because it is a long time before the hybrid method getting the field, one can use the artificial net work ' s character of learning by itself, and get the law of the path loss. consequently, it become easier to study the wireless electrical wave ' s propagation characters
利用混合法計算場，比較耗時，可以運用人工神經網路的自學習功能，就能很快得出路徑損耗規律，從而更加方便對室內的無線電波傳播特性進行研究。 -
This text has counted the electric wave propagation path loss of street in one kind of typical rule range urban area, and reaches calculations data fairly with the measured data in the document. then calculate and analyze electric wave propagation ’ s characteristic in urban area. finally give an electric wave propagation prediction application example of column building model
本文最後計算了一種典型的規則排列得城市環境中街道得電波傳播路徑損耗，並與文獻中得實測及計算數據進行了比較，然後進一步對矩形、圓柱型建築物城市小區電波傳播進行了分析計算。 -
Firstly, the propagation of intense laser light in ionizing gases is analyzed including the ionization - modulation instability, the vectorial and nonparaxial effects, and the mechanism of laser energy loss. secondly, we analyze the propagation of intense laser light in plasmas, and effects such as the weakly relativistic nonlinearity, the ponderomotive force and the wakefield are analyzed
文中對強激光在電離氣體中傳輸的電離不穩定性、矢量非傍軸傳輸和能量損耗機制，以及強激光在等離子體中傳輸的弱相對論性非線性效應、有質動力作用和尾波場效應等都作了基本的分析。 -
Second, the mode fields of a strip waveguide and some slab waveguides have been simulated by applying finite - difference time - domain ( fdtd ) method. the curvature radius ; vicinity coupling ; transition loss and power attenuation of a s - shape bend waveguide have been analysed numerically by employing wide angle finite - difference beam propagation method ( fd - bpm ), as well as the coupling loss of optical fiber and waveguide. in addition, the framework of the s - shape waveguide laser has been
其次，應用時域有限差分法，結合波導模式理論對條形與平面波導進行了模場模擬;應用廣角有限差分光束傳播法，對s形彎曲波導的曲率半徑、鄰近耦合、過渡損耗、功率衰減以及波導與光纖的各種耦合損耗進行了數值分析，並在此基礎上，對s形波導激光器的結構作了初步設計。 -
Some of these considderationsinclude insertion loss, cross talk, propagation delay, and unterminated stubs
需要考慮的因素包括插入損耗、串擾、傳輸延遲和未端接短截線。 -
The propagation characteristics of underwater acoustic channels and their influences on long - range information transmission are studied thoroughly. based on the sonar equation, the optimal frequency band is abtained. from the calculation about transmission loss, the source level is forecasted. based on the random time varying channel theory, the fading characteristics of long - range underwater acoustic channels are analyzed
系統、深入地研究了水聲通道特性及其對水聲遠程信息傳輸系統的影響；從聲納方程出發，確定了系統的最佳工作頻段；在聲傳播損失計算的基礎上，給出了聲源級的預報；基於時變通道理論，描述了遠程水聲通道的衰落特性。 -
The radiation loss was obtained from the imaginary part of the complex propagation constant and the transition loss was calculated by two - dimension overlap integral method
基於計算得到的直彎波導的模場分佈，採用二維重疊積分法計算了兩者連接時的過渡損耗。 -
Effects of loss, third - order dispersion and five - order nonlinearity on chirp gaussian pulses propagation in optical fiber
高階非線性效應對啁啾高斯光脈沖傳輸的影響 -
The simulation using the bi - directional beam propagation method proves that the demultiplexer can have very low insertion loss and high isolation ratio
藉由雙向光束傳播法來模擬此組件，結果顯示此解多任務器具有很低的插入損耗和高的隔離度。 -
Then critical technologies of simulation system are discussed, including frame processing structure, fh sequence generator, simulation models of path loss and multipath channel, simulation of signal propagation delay and jamming signal etc
其次，討論了模擬系統實現的關鍵技術，包括幀處理結構、跳頻序列發生器、路徑損耗與多徑通道模擬模型、信號傳播延時及干擾信號的模擬等。 -
By analyzing the model of radio wave propagation loss, this paper provides a weighted centroid localization algorithm that uses coefficients, which are decided by the influence of beacons to unknown nodes, to prompt localization accuracy
文中通過對無線電傳播路徑損耗模型的分析，提出了加權質心定位演算法，用信標節點對未知節點的不同影響力來確定加權因子，以提高定位精度。
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