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??;輸?shù)簟?4.錯過;浪費(fèi)。 5.損毀;【軍事】傷亡;〔pl.〕 傷亡及被俘人數(shù)。 loss of sight 失明。 copper loss【電學(xué)】銅耗。 core [iron] loss【電學(xué)】鐵耗。 a dead loss凈虧,純損。 an idling loss空轉(zhuǎn)損耗。 a total loss總損失。 His death is a great loss to the country. 他的死是國家的大損失。 profit and loss盈虧。 suffer heavy losses 遭受重大損失。 loss of pressure 壓力下降。 loss in weight 重量[體重]減少。 loss of weight 失重。 the loss of a war 戰(zhàn)敗。 loss of opportunity 錯過機(jī)會。 at a loss 1. 無辦法,為難 (I am at a loss what to do. 我就是不知道怎樣辦才好)。 2. (獵犬)失去獵物嗅跡。 3. 虧本地 (sell sth. at a loss賠本賣出某物)。 cut a [the] loss 趕緊脫手以免多受損失。 for a loss 處于苦惱中 (throw them for a loss 使他們苦惱)。 make a loss 虧損。 without (any) loss of time 即刻,馬上。
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(quán)質(zhì)心定位算法,用信標(biāo)節(jié)點(diǎn)對未知節(jié)點(diǎn)的不同影響力來確定加權(quán)因子,以提高定位精度。
The thesis analyzes the transmitting characteristic of the uwa channel , derives the propagation losses , eigenrays and channel impulse responses of uwa channel by use of the kraken normal wave mode and the ray trace algorithm based on velocity - depth curvilinear profile approximation . based on the analysis , a scheme of auto - replying lduwarc system by means of spread spectrum technique has been designed 論文首先分析了遠(yuǎn)程聲遙控信道傳輸特性,分別利用kraken簡正波和射線跟蹤模型對深海和淺海水聲信道的傳輸特性進(jìn)行分析,對信道的多徑結(jié)構(gòu)、衰落和環(huán)境噪聲進(jìn)行了計(jì)算,并在此基礎(chǔ)上設(shè)計(jì)了基于擴(kuò)頻技術(shù)的自主應(yīng)答式遠(yuǎn)程聲遙控系統(tǒng)方案。