線路電氣常數 的英文怎麼說

中文拼音 [xiàndiànchángshǔ]
線路電氣常數 英文
linear electric constant
  • : 名詞1 (用絲、棉、金屬等製成的細長的東西) thread; string; wire 2 [數學] (一個點任意移動所構成的...
  • : 1 (道路) road; way; path 2 (路程) journey; distance 3 (途徑; 門路) way; means 4 (條理) se...
  • : Ⅰ名詞1 (有電荷存在和電荷變化的現象) electricity 2 (電報) telegram; cable Ⅱ動詞1 (觸電) give...
  • : Ⅰ名詞1 (氣體) gas 2 (空氣) air 3 (氣息) breath 4 (自然界冷熱陰晴等現象) weather 5 (氣味...
  • : 數副詞(屢次) frequently; repeatedly
  • 線路 : 1. [電學] circuit; line 2. [交通運輸] line; route
  • 電氣 : [電學] electrical; electric電氣安裝 electric mounting; 電氣保護 electric protection; 電氣保護裝置...
  1. 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

    而精確預測無波傳播徑損耗特性,則為合理的微蜂窩無規劃、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、統計所得據建立經驗性傳播預測模型;另一種是用射跟蹤方法,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中的無波傳播的基本特性,介紹了陸地移動通信系統中用的幾種波傳播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波傳播特性研究的局限性。
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